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Hephaestus Research Station, currently on Day 448 of its orbit around red dwarf star Wolf 359. In case you're wondering, Wolf 359 is not located within the Solar System, and there is only one star in the Solar System, the Sun. Wolf 359 does not have a proper name and is only known by catalogue designations, including Wolf 359, Gliese 406 (GJ 406), and the variable star designation CN Leonis. Wikipedia says 7.9 light years to wolf 359. Ross 248 is about 10.3light-years from Earth in the constellation Andromeda. b) The ratio apparent brightness of . Wolf 359 is a red dwarf star located in the constellation Leo, near the ecliptic. 7.8 light years from Earth. Measuring to a point 1/2 way between earth and New Horizons (which is essentially the same as to the sun or earth in light years) I am still amazed at "how close it was to the correct answer". (ii) Calculate the distance in light-year from Earth to Wolf 359. In fact, to be able to see it, they have to use telescopes. In reality, Wolf 359 is located only 7.78 light-years from Earth. 1. That's true. The parallax of Wolf 359 was first measured at Mount Wilson Observatory in 1928 and reported as 0.407 0.009 arcseconds. Wolf 359 location, image: Torsten Bronger (CC BY-SA 3.0). The total distance is about 80 light years. Distance (light years . Nearest stars to the Sun, image: Wikimedia Commons/Nsae Comp (CC BY-SA 4.0). The advantage of these tandem observations is that the New Horizons probe is 46 times the Earth-Sun . if(document.querySelector("#google_image_div")){ The star Wolf 359 is at a distance of 7.8 light-years from Earth. With an apparent magnitude of 13.54, it is invisible to the unaided eye and can only be seen in larger telescopes. Does ZnSO4 + H2 at high pressure reverses to Zn + H2SO4? A high rate of proper motion can indicate that a star is located nearby, as more distant stars must move at higher velocities in order to achieve the same rate of angular travel across the celestial sphere. Its space velocity indicates that it is an old-disk star. At the time of the observations, New Horizons was more than 4.3 billion miles (about 7 billion kilometers) from Earth, where a radio signal, traveling at the speed of light, needed a little under 6 hours and 30 minutes to reach home. For an Earth-like world to have liquid water . Wolf 359 is a red dwarf that is located in the constellation Leo, near the ecliptic. It was also the site where Captain Benjamin Sisko lost his wife during the battle. It's not visible to the naked eye. New Horizons which flew by Pluto in 2015, and the remote Kuiper Belt object Arrokoth in January 2019 recently photographed our nearby stars Proxima Centauri and Wolf 359. Picard is on Rigel 7 and needs to go to Earth, traveling a distance of 776.6 light-years, but the warp drive is broken. The Gliese ID of the star is GL 406. Its proximity to Earth has led to its mention in several works of fiction. . ThoughtCo, Aug. 28, 2020, thoughtco.com/closest-stars-to-earth-3073628. LHS (Luyten Half-Second) catalogue is a catalogue of stars whose proper motions exceed half a second of arc annually. This indicates the star must be at least 100 million years old. The human eye cannot detect these shifts. In early 2367, on stardate 44002.3, a fleet of forty starships, under the command of Admiral J.P . (Reference book: Spaceflight Chronology) The Wolf 359 system was the site of a major battle between the United Federation of Planets and the Borg. However, because Proxima Centauri is a smaller and cooler red dwarf type star, the planet's orbit is within the habitable zone. Keeping in mind that the speed of light is , and that in 1 year there are 365 days x 24 hours x 60 minutes x 60 seconds = , the distance between Wolf-359 and Earth is . ga('ads.send', { Minimising the environmental effects of my dyson brain. Ceti-Epsilon Eridani- 40 Eridani-Sirius-Procyon-Wolf 359-Alpha Centauri -Sun. Making statements based on opinion; back them up with references or personal experience. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Wolf 359 is one of the nearest stars to the Sun; only the Alpha Centauri system (including Proxima Centauri), Barnard's Star, and the brown dwarfs Luhman 16 (WISE 1049-5319) and WISE 08550714 are known to be closer. . The companion images of Proxima Centauri and Wolf 359 were provided by different institutes. Lalande 21185. . Leo is one of the 48 Greek constellations, first catalogued by the Greek astronomer Ptolemy in the 2nd century CE. Wolf 369 is known to many as the famous battle . imported from Wikimedia project. If Star X is 50 times as far from the sun as Wolf 359 is, how far is Star X from the sun, to the nearest light-year? The radius of 0.16 solar radii was determined by a 1990 study that combined optical and infrared photometry of red and orange dwarfs, including Wolf 359. } 7.780.04 light-year. This star is named for the 19th-century French astronomer Joseph Jrme Lefranois deLalande. hitType: 'event', Wolf 359 has at least 2 Extrasolar Planets believed to be in orbit around the star. b) Calculate the distance in light-years from Earth to Wolf 359. (i) Describe how this parallax angle is measured. What was the largest death count in Star Trek? 0.0000158. According to experts, this is New Horizons' first interstellar "parallax experiment" in which stars appear to be in different locations due to the "parallax effect." Life's not easy for Doug Eiffel, the communications officer for the U.S.S. reporters on a platform technologically tailored to meet the needs of the modern reader. Some of those worlds may exist in its habitable zone, a region that allows liquid water to flow freely on planetary surfaces. Wolf 359 - posted in Experienced Deep Sky Imaging: Wolf 359 is one of the closest stars to our sun and also one of the smallest and least luminous stars known (other than brown dwarfs, which are not really stars). At a distance of approximately 7.9 light years from Earth, it has an apparent magnitude of 13.54 and can only be seen with a large telescope. There are closer stars to our Sun which include the Sun. Still, astronomers will keep checking on possible worlds and their habitability for life. "The New Horizons experiment provides the largest parallax baseline ever made over 4 billion miles and is the first demonstration of an easily observable stellar parallax," said Tod Lauer, New Horizons science team member from the National Science Foundation's National Optical-Infrared Astronomy Research Laboratory, who coordinated the parallax demonstration. His only company on board the stati This projected rotational velocity of Wolf 359's equator is less than 3km/s, which is below the threshold of detection through spectral line broadening. These are equivalent to the Longitude and Latitude on Earth. As the Earth is titled, we therefore have Celestial and Ecliptic hemispheres and they can be different for a star. } Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Answer (1 of 2): Parallax measurements always have some uncertainty due to the sensitivity of the measurements taken to determine it. The images collected on Earth when New Horizons was observing Proxima Centauri and Wolf 359 really exceeded my expectations,"said Lauer. We'll assume that the Borg cube was traveling slightly under it's maximum speed. We've added a "Necessary cookies only" option to the cookie consent popup, Latest Blog Post: Jacks Bad Movies Black Adam (2022). That's because Wolf 359 is a faint red dwarf star. The Sun's radius is 695,800km, therefore, the star's radius is an estimated 111,328.km. These include Messier 65, Messier 66 and NGC 3628 in the Leo Triplet (M65 Group), and Messier 95, Messier 96 and Messier 105 in the Leo I Group (M96 Group). This article is about the star. For example, a red star can be large or small. [52], In June of 2019, an international team of astronomers led by Mikko Tuomi from the University of Hertfordshire, UK, submitted a preprint with the results of the first reported detection of two candidate exoplanets orbiting Wolf 359 using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii. Wolf 359 is a star, a red dwarf, 7.8 light years from Earth. I also think StarTrek.com may be under reporting the distance from Wolf 359 to Earth a little. Star Trek.com tells us that the system is 7.6 light years away. Are lightsails possible? . - Age: 350 million years System: Akela and its planets are apparently named after lupine characters in an old Earth fiction work Jungle Book (the identity of the author, only . Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. CNLeoLightCurve.png 1,500 975; 105 KB. [44] During flare activity, Wolf 359 has been observed emitting X-rays and gamma rays. Procyon . Wolf 359 is a flare star, a variable star of the UV Ceti type that can undergo sudden increases in brightness across the spectrum. Observations with the Hubble Space Telescope detected 32 flare events within a two-hour period, with energies of 1027 ergs (1020 joules) and higher. John P. Millis, Ph.D. is a professor of physics and astronomy at Anderson University. So, what's the closest star to us? Wolf 359 is a red dwarf star of the spectral type M6.5 Ve or dM6. In order to calculate the distance to Wolf 359 correctly, one would have to account for the shifts in all the reference stars. In 1919 he published a catalog of over one thousand stars with high proper motions, including this one, that are still identified by his name. distance from Earth. At 9.68 light-years . 12 Iconic Images From Hubble Space Telescope, How to Spot the Cassiopeia Constellation in the Night Sky, The Hercules Constellation: Location, Stars, Deep Sky Objects, There's a Starry Pooch in the Sky Named Canis Major, How to Find the Capricornus Constellation, Ph.D., Physics and Astronomy, Purdue University. The constellations brightest star Regulus marks the celestial Lions heart, the stars of the Sickle outline the mane, Zosma and Chertan the rump, and Denebola the tail. (ii) Calculate the distance, in metres, from Wolf 359 to Earth. It has a mass of 3.8 Earth masses (0.012 Jupiter masses) and orbits the star from a distance of 0.018 astronomical units with a period of 2.68687 days. Epsilon has a dust disk around it and appears to have a planetary system. Either that or someone bumped up the distance in Wikipedia. The Proxima Centauri image was obtained on April 22 by a remotely operated 0.4-meter telescope at the Siding Spring node of the Las Cumbres Observatory in Australia. Its mass is just above the lowest limit (0.08 solar masses) at which a star is massive enough to ignite stable hydrogen burning in its core. The location of the Wolf 359 in the night sky is determined by the right ascension (R.A.) and declination (Dec.). [31], The entire star is undergoing convection, whereby the energy generated at the core is being transported toward the surface by the convective motion of plasma, rather than by transmission through radiation. It lies 8.5 light-minutes away from Earth, which translates to 149 million kilometers (93 million miles). NASA's New Horizons spacecraft travels at nearly 60,000 km/h, the fastest a spacecraft has ever traveled in the Solar System. It represents the Nemean lion, a Greek mythical monster that met its end at the hands of Heracles as part of the heros Twelve Labours. Located only 8.31 light years from the Sun, it is also one of our nearest neighbours. Wolf 359 is located in the Milky Way galaxy, and this is the galaxy that you reside in. document.querySelector("#google_image_div").addEventListener('click',function(){ Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. Wolf 359 is located approximately 2.4 parsecs or 7.7 light years from the Earth. Once the Borg had destroyed the fleet, it should have taken them almost no time to reach Earth. It's located in the direction of the constellation Leo. What is wolf 359's distance from the sun? The brightness of a star depends on its temperature hotter stars emit more light . With a mean stellar flux of about three times that of the Earth (and over 60% higher than Venus), there is no likelihood that Wolf 359c is a potentially habitable planet. I also think StarTrek.com may be under reporting the distance from Wolf 359 to Earth a little. window.googletag.cmd.push(function() { Wolf 359 is one of the nearest stars to the Sun; only the Alpha Centauri system (including Proxima Centauri), Barnard's Star, and the brown dwarfs Luhman 16 (WISE 1049-5319 . Neither planet orbits in the stars habitable zone, which is between 0.024 and 0.052 astronomical units from the star. Wolf 359 is one of the nearest stars to the Sun only the Alpha Centauri s pg.acq.push(function() { Other well-known examples of this variable class in the Suns neighbourhood include Proxima Centauri and Barnards Star, the first and fourth nearest stars to the solar system. Most of these events were microflares. [50] The closest stellar neighbor to Wolf 359 is the red dwarf Ross 128 at 3.79ly (1.16pc) away. At a distance of approximately 7.9 light years from Earth, it has an apparent magnitude of 13.54 and can only be seen with a large telescope. Guaranteed time observations Data Release 1 (2016-2020)", The Encyclopedia of Astrobiology, Astronomy, and Spaceflight, Celestial objects within 510 light-years, https://en.wikipedia.org/w/index.php?title=Wolf_359&oldid=1140844104, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 22 February 2023, at 01:42. It is also known as Gliese 65 and is a binary star system. It first came to the attention of astronomers about a century ago because of its relatively high proper motion of 4.7 arc seconds per year first measured in 1917 by German astronomer Max Wolf (1863-1932) of the . Connect and share knowledge within a single location that is structured and easy to search. [6] This low rate of rotation may have been caused by loss of angular momentum through a stellar wind. It was recorded as one of the most destructive battles in Federation history prior to the Dominion War. 3. Wolf 359 is one of the nearest stars to the Sun; only the Alpha Centauri system, Barnard's Star, and the brown dwarfs Luhman 16 and WISE 08550714 are known to be closer. Millis, John P., Ph.D. "The 10 Closest Stars to Earth." @Xantec thanks for picking that up - my bad! Located in the constellation Ursa Major, Lalande 21185 is a faint red dwarf that, like many of the stars in this list, is too dim to be seen with the naked eye. Based on the location of Leo, Wolf 359 can be located in the northern hemsiphere of the celestial sky. Just saying. His only company on board the station are stern mission chief Minkowski, insane science officer Hilbert, and . On this Wikipedia the language links are at the top of the page across from the article title. 'Very open to the idea': Julia Wandelt takes DNA test to verify if she is missing Swiss girl Livia Schepp, Kayla Lemieux: Teacher with prosthetic Z-cup breasts suspended WITH PAY after pics show her dressed as man, Michael Schneider: Psychic detective gives '100%' verdict on whether Julia Wandelt is Madeleine McCann, Lindsay Clancy case: Psychologist reveals psychosis red flags family members could have spotted, 'I'd be horrified if my kids did that': Internet slams eight-year-old's pregnant mom for enabling 'disgusting' behavior. So, to travel that distance at warp 9.9, it would be (7.2e13 / 913,878,914) / 3600 seconds = approximately 22 hours. [33], A search of this star by the Hubble Space Telescope revealed no stellar companions. 4. . Statistics; OpenStreetMap; Locator tool; Search depicted; Media in category "Wolf 359" The following 5 files are in this category, out of 5 total. For the fictional Star Trek battle, see, Wolf 359 is shown near the ecliptic in the southern region of, "Gaia Early Data Release 3: Summary of the contents and survey properties", Monthly Notices of the Royal Astronomical Society, "A search for faint companions to nearby stars using the wide field planetary camera 2", "List of the nearest 100 stellar systems", "The CARMENES search for exoplanets around M dwarfs. Absolute Magnitude is the star's apparent magnitude from 10 parsecs or 32.6 light years. The number refers to where the star was indexed in the library. Wolf 359 is the name of the red dwarf that is located in the Leo Constellation, near ecliptic. His only company on board the station are stern mission chief Minkowski, insane science officer Hilbert, and Hephaestus Station's . eventCategory: event.slot.getSlotElementId(), . . window.googletag.pubads().addEventListener('slotRenderEnded', function(event) { . 3.324), Adhafera (Zeta Leo, mag. eventAction: 'view' Pixels on the camera's grid . In combination with a lower rate of hydrogen consumption due to its low mass, the convection will allow Wolf 359 to remain a main-sequence star for about eight trillion years. 5. The 2005 study derived an age of 200 350 million years and a mass of 0.1 0.09 M from a measured effective temperature of 2,800 K and a luminosity of -2.95 L. Millis, John P., Ph.D. "The 10 Closest Stars to Earth." 5 items. Wolf 359 is known by a variety of names. They are caused by magnetic activity in the stars atmosphere. It's thought that Proxima Centauri b receives approximately the same amount of solar energy as Earth does from our Sun. [35][36] Radial velocity measurements of this star using the Near Infrared Spectrometer (NIRSPEC) instrument at the Keck II observatory have not revealed any variations that might otherwise indicate the presence of an orbiting companion. Wolf 359 is a relatively slow spinner, with a projected rotational velocity of less than 3 km/s. [34] No excess infrared emission has been detected, which may indicate the lack of a debris disk in orbit around it. How did Starfleet replace 39 ships in a year? hitType: 'event', [14], The proper motion Wolf 359 against the background is 4.696arcseconds per year, and it is moving away from the Sun at a velocity of 19km/s. #4. He's stuck on a scientific survey mission of indeterminate length, 7.8 light years from Earth. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Since it has less than 0.25 solar masses, it will never become a red giant. The combination yields a 3D view of the stars "floating" in front of their background star fields," said NASA. rev2023.3.3.43278. [14], Wolf 359 is classified as a UV Ceti-type flare star,[5] which is a star that undergoes brief, energetic increases in luminosity because of magnetic activity in the photosphere. However, that hasn't kept astronomers from studying it. The star is named for Willem Jacob Luyten, who helped determine its proper motion. [42] The strength of this line can vary over a time period of several hours, which may be evidence of microflare heating. Lalande 21185 is the brightest red dwarf in the northern sky, but still invisible to the unaided eye with an apparent magnitude of 7.520. It can only be observed in larger telescopes. Asking for help, clarification, or responding to other answers. Solariabsg25, Nov 5, 2016. The nearest neighbour to Wolf 359 is Ross 128, a red dwarf appearing near Zavijava (Beta Virginis) in the constellation Virgo. Like Wolf 359, it is a red dwarf classified as a UV Ceti variable. Wolf 359 - 7 . The distance to the star Wolf 359 = 2,409 0.009 pc, ie 7.86 light-years (+/-0.03 ly) Remarks: On April 22, 2020, we made observations with the ATEO-1 remote telescope in tandem with the New Horizons space probe at nearby star Wolf 359. Here's an interesting bit of trivia about this star: it was the location of an epic battle on the television series"Star Trek: The Next Generation,"where the cyborg-human Borg race and the Federation fought for control of the galaxy. Since the Earth-Sun distance is 15 meters in the Voyage model, a basketball-size Earth would require an Earth-Sun distance of about 3 kilometers, and a Sun-Pluto distance of about 120 kilometers.) You can decline to give a name; if that is the case, the comment will be attributed to a random star. The Battle of Wolf 359 took place in early 2367 in the Wolf system, roughly eight light years from Earth, between the forces of the United Federation of Planets and the Borg Collective. hitType: 'event', It comprises the closest set of stars, even if their light does take just over four years to reach us. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. The 10 Closest Stars to Earth. window.adsContainer = {"position2":{"code":"Article_Mobile_Above_Next_Rel","max_width":300,"max_height":250},"position3":{"code":"Article_Mobile_300x250_ATF_Rel","max_width":300,"max_height":250},"position4":{"code":"Article_Mobile_Middle_Rel","max_width":300,"max_height":250},"position5":{"code":"Article_Mobile_Middle1_Rel","max_width":300,"max_height":250},"position6":{"code":"Article_Mobile_Middle2_Rel","max_width":300,"max_height":250},"position7":{"code":"Article_Mobile_Middle3_Rel","max_width":300,"max_height":250},"position8":{"code":"Article_Mobile_Middle4_Rel","max_width":300,"max_height":250},"position9":{"code":"Article_Mobile_Middle5_Rel","max_width":320,"max_height":250},"position10":{"code":"Article_Mobile_Middle6_Rel","max_width":320,"max_height":250},"position11":{"code":"Article_Mobile_Middle7_Rel","max_width":320,"max_height":250},"position12":{"code":"Article_Mobile_Middle8_Rel","max_width":320,"max_height":250},"position13":{"code":"Article_Mobile_Middle9_Rel","max_width":320,"max_height":250},"position14":{"code":"Article_Mobile_Middle10_Rel","max_width":320,"max_height":250},"position15":{"code":"Article_Mobile_Middle11_Rel","max_width":320,"max_height":250},"position16":{"code":"Article_Mobile_Middle12_Rel","max_width":320,"max_height":250}} This instrumentation is sensitive enough to detect the gravitational perturbations of massive, short period companions with the mass of Neptune or greater. If we broaden our definition of "nearby," however, there are more stars closer to the Sun than we expect. The most massive is 40 Eridani A, chosen as Vulcan's home world. [39] Numerous molecular bands appear in the spectrum of Wolf 359, including those of carbon monoxide (CO),[40] iron hydride (FeH), chromium hydride (CrH), water (H2O),[16] magnesium hydride (MgH), vanadium(II) oxide (VO),[14] titanium(II) oxide (TiO) and possibly the molecule CaOH. Notable stars in the constellation include Regulus (Alpha Leonis), the 21st brightest star in the sky, Algieba (Gamma Leonis), a binary system composed of two giants, the white giant Adhafera (Zeta Leonis), the carbon star CW Leonis, the white supergiant Eta Leonis, Icarus (MACS J1149 Lensed Star 1), one of the most distant stars known, and Caffaus Star (SDSS J102915+172927), one of the oldest stars known in the Milky Way with an estimated age of 13 billion years. The timing accounts for New Horizons being nearly three light hours closer to Proxima Centauri than Earth when the images were taken. Sun. These photographs of Proxima Centauri and Wolf 359 stars that are well-known to amateur astronomers and science fiction aficionados alike employ the largest distance between viewpoints ever achieved in 180 years of stereoscopy," said May. NASA probe captures images of our nearest stars appearing to be in different positions than seen from Earth. Thanks for contributing an answer to Science Fiction & Fantasy Stack Exchange! [30] For comparison, the equatorial radius of the planet Jupiter is 71,492km, which is 73% as large as Wolf 359's. The primaries in the system, Alpha Centauri A and Alpha Centauri B, are about 4.37 light-years from Earth. But since even the nearest stars are hundreds of thousands of times farther away than the diameter of Earths orbit, the parallax shifts are tiny, and can only be measured with precise instrumentation. 3.52), and Rho Leonis (mag. One planetary companion is suspected, with another candidate planet having been found to be a likely false positive, but as yet no debris disks have been found. eventCategory: event.slot.getSlotElementId(), Check out our list of the top ten closest stars to Earth. Distance from Earth: 7.78 0.04 ly; . His only company on board the station are stern mission chief Minkowski . Only objects with a magnitude of 6.5 or less can be seen on a clear night. It is not part of the Leo constellation outline but is within the borders of the constellation. Objects with less than 0.08 solar masses are known as brown dwarfs and they cannot trigger sustained nuclear fusion of hydrogen into helium. Barnard's Star Distance from Earth. Russian Wikipedia. Full impulse is of the . Discovered by the German astronomer Max Wolf in 1917 the star has a distance of approximately 7.8 light years from the earth and can be seen with the help of a large telescope. The star cannot be seen by the naked eye, you need a telescope to see it. Which are you interested in; why the. 1.40), Algieba (Gamma Leo, mag. Determine the ratio In the email will be a link to unsubscribe to further notifications. Given its relatively short distance from Earth of 31 light-years, Wolf 1069 b is now the sixth closest Earth-mass habitable zone exoplanet; the others are, in order of increasing distance, Proxima . The distance from the star where an Earth-type planet would be comfortable with . [Hint: how is parallax angle related to . The designation Wolf 359 comes from a 1919 catalogue of stars with high proper motions published by the German astronomer and astrophotography pioneer Max Wolf, who was the first to measure the stars proper motion in 1917. The calculation is correct (I divided by 60 and then again by 60). 1 reference. As close as it is at a distance of 8.29 light-years, it is not likely that humans will travel to Lalande 21185 any time soon. 1 light year is the distance covered by the light in 1 year. These flares emit strong bursts of X-ray and gamma ray radiation that have been observed by space telescopes. 3.33), Eta Leonis (mag. Notifications can be turned off anytime from browser settings. Launched in 2006, New Horizons will eventually leave the solar system, joining the Voyagers and Pioneers on their paths to the stars. It would be interesting to see it at that time. Now, we learn in TNG 'Q Who' that the Borg Cube was capable of keeping up with the Enterprise-D at Warp 9.65 (Source). Of the stars listed below, which is furthest from Earth? Wolf 359 is the fifth closest star to earth. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Astronomers will keep looking, of course, but it doesn't seem too likely that it contains planetary neighbors. His only company on board the station are stern mission chief Minkowski, insane science officer Hilbert, and Hephaestus Station's . When a scientist recreates the environment of a distant planet, its accelerated rate of evolution suggests a shocking future for mankind. [19], The first parallax measurement of Wolf 359 was reported in 1928 from the Mount Wilson Observatory, yielding an annual shift in the star's position of 0.407 0.009 arcseconds.