Barnard's Star Data
Object Name: Barnard’s Star, LHS 57, GJ 699, G 140-24, NLTT 45718, TYC 425-2502-1, HIP 87937
Object Type: Star, Red Dwarf Star, High Proper Motion Star
Object Location: RA: 17h 57m 48.s498 Dec: +04° 41’ 35.”40 J2000.0. Galactic coordinates l = 031.009 b = +14.063 J2000.0. In the constellation Ophiuchus.
Object Distance: 5.977 ly (1.834 pc)
Object Size: mass = 0.16 solar masses, radius = 0.200 solar radii
Object Brightness: apparent visual magnitude = 9.53 (VJM), absolute visual magnitude = 13.24
View of Barnard's Star (superimposed on a steady background) showing the shift in location over just 6 years. (Source: http://rst.gsfc.nasa.gov/Sect20/A5a.html
View of Barnard's Star (superimposed on a steady background) showing the shift in location over just 6 years. (Source: http://rst.gsfc.nasa.gov/Sect20/A5a.html
Object Description:
Barnard’s Star is a fascinating object, not only because of its high proper motion and nearness, but also because of earlier suggestions that it hosted planets. Edward Emerson Barnard (AD 1857-1923) first reported this faint star with an unusually high proper motion in 1916. It remains the star with the highest known proper motion, 10.3700 arcsec yr-1 nearly due north. The space velocity of Barnard's Star has been used to classify it as belonging to the halo of our Milky Way Galaxy or an older disk population than our Sun.
Although Barnard's Star is currently the second closest star system to our Solar System, it is moving towards us with a radial velocity of 110.5 km s-1. It will pass within 3.8 light-years of us in the year 11,800 AD. In comparison, Alpha Centauri is about 4.24 light-years away. As Barnard's Star approaches, it will appear to brighten. However, at its closest approach, its apparent visible magnitude will be approximately 8.6 still requiring a telescope in order to view it.
References
Barnard, E. E. 1916, Astron. J., 29, 181[1]
Benedict, G. F. et al. 1999, Astron. J., 118, 1086[2]
Delfosse, X., Forveille, T., Ségransan, D., Beuzit, J.-L., Udry, S., Perrier, C., & Mayor, M. 2000, Astron. Astrophys., 364, 217[3]
Dawson, P. C. & De Robertis, M. M. 2004, Astron. J., 127, 2009 [4]
Harrington, R. S. & Harrington, B. J. 1987, Mercury, 16, 77[5]
Høg, E. et al. 2000, Astron. Astrophys., 355, L27 (Tycho)[6]
Leggett, S. K. 1992, Astrophys. J. Suppl. Ser., 82, 351[7]
Mitchell, S. A. 1923, Obs., 46, 158[8]
Nidever, D. L., Marcy, G. W., Butler, R. P., Fischer, D. A., & Vogt, S. S. 2002, Astrophys. J. Suppl. Ser., 141, 503[9]
Ochsenbein, F., Bauer, P., & Marcout, J., 2000, Astron. Astrophys. Suppl. Ser., 143, 221 (Vizier)[10]
SIMBAD database, operated at Centre de Données astronomiques de Strasbourg (CDS), Strasbourg, France[11]
Weis, E. W. 1993, Astron. J., 105, 1962[12]
Citation
Bartlett, Jennifer (Contributing Author); Bernard Haisch (Topic Editor). 2008. "Barnard's Star." In: Encyclopedia of the Cosmos. Eds. Bernard Haisch and Joakim F. Lindblom (Redwood City, CA: Digital Universe Foundation). [First published November 13, 2007].
<http://www.cosmosportal.org/articles/view/135469/>
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Barnard's Star Data
Object Name: Barnard’s Star, LHS 57, GJ 699, G 140-24, NLTT 45718, TYC 425-2502-1, HIP 87937
Object Type: Star, Red Dwarf Star, High Proper Motion Star
Object Location: RA: 17h 57m 48.s498 Dec: +04° 41’ 35.”40 J2000.0. Galactic coordinates l = 031.009 b = +14.063 J2000.0. In the constellation Ophiuchus.
Object Distance: 5.977 ly (1.834 pc)
Object Size: mass = 0.16 solar masses, radius = 0.200 solar radii
Object Brightness: apparent visual magnitude = 9.53 (VJM), absolute visual magnitude = 13.24
View of Barnard's Star (superimposed on a steady background) showing the shift in location over just 6 years. (Source: http://rst.gsfc.nasa.gov/Sect20/A5a.html
View of Barnard's Star (superimposed on a steady background) showing the shift in location over just 6 years. (Source: http://rst.gsfc.nasa.gov/Sect20/A5a.html
Object Description:
Barnard’s Star is a fascinating object, not only because of its high proper motion and nearness, but also because of earlier suggestions that it hosted planets. Edward Emerson Barnard (AD 1857-1923) first reported this faint star with an unusually high proper motion in 1916. It remains the star with the highest known proper motion, 10.3700 arcsec yr-1 nearly due north. The space velocity of Barnard's Star has been used to classify it as belonging to the halo of our Milky Way Galaxy or an older disk population than our Sun.
Although Barnard's Star is currently the second closest star system to our Solar System, it is moving towards us with a radial velocity of 110.5 km s-1. It will pass within 3.8 light-years of us in the year 11,800 AD. In comparison, Alpha Centauri is about 4.24 light-years away. As Barnard's Star approaches, it will appear to brighten. However, at its closest approach, its apparent visible magnitude will be approximately 8.6 still requiring a telescope in order to view it.
References
Barnard, E. E. 1916, Astron. J., 29, 181[1]
Benedict, G. F. et al. 1999, Astron. J., 118, 1086[2]
Delfosse, X., Forveille, T., Ségransan, D., Beuzit, J.-L., Udry, S., Perrier, C., & Mayor, M. 2000, Astron. Astrophys., 364, 217[3]
Dawson, P. C. & De Robertis, M. M. 2004, Astron. J., 127, 2009 [4]
Harrington, R. S. & Harrington, B. J. 1987, Mercury, 16, 77[5]
Høg, E. et al. 2000, Astron. Astrophys., 355, L27 (Tycho)[6]
Leggett, S. K. 1992, Astrophys. J. Suppl. Ser., 82, 351[7]
Mitchell, S. A. 1923, Obs., 46, 158[8]
Nidever, D. L., Marcy, G. W., Butler, R. P., Fischer, D. A., & Vogt, S. S. 2002, Astrophys. J. Suppl. Ser., 141, 503[9]
Ochsenbein, F., Bauer, P., & Marcout, J., 2000, Astron. Astrophys. Suppl. Ser., 143, 221 (Vizier)[10]
SIMBAD database, operated at Centre de Données astronomiques de Strasbourg (CDS), Strasbourg, France[11]
Weis, E. W. 1993, Astron. J., 105, 1962[12]
Citation
Bartlett, Jennifer (Contributing Author); Bernard Haisch (Topic Editor). 2008. "Barnard's Star." In: Encyclopedia of the Cosmos. Eds. Bernard Haisch and Joakim F. Lindblom (Redwood City, CA: Digital Universe Foundation). [First published November 13, 2007].
<http://www.cosmosportal.org/articles/view/135469/>
Are you absolutely sure you want to delete this article? This process cannot be undone and is permanent.
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