Chalawan, BD+41°2147, FK5 1282, GC 15087, GCTP 2556.00, Gliese 407, HD 95128, HIP 53721, HR 4277, LTT 12934, SAO 43557
Database references
SIMBAD
The star
planet b
planet c
planet d
Exoplanet Archive
data
ARICNS
data
47 Ursae Majoris (abbreviated 47 UMa), formally named Chalawan/ˈtʃɑːləwən/,[7][8] is a yellow dwarf star approximately 45.3 light-years[1] from Earth in the constellation of Ursa Major. As of 2011[update], three extrasolar planets (designated 47 Ursae Majoris b, c and d; the first two later named Taphao Thong and Taphao Kaew) are believed to orbit the star.
The star is located fairly close to the Solar System: according to astrometric measurements made by the Gaia space observatory, it exhibits a parallax of 72.0070 milliarcseconds, corresponding to a distance of 45.30 light-years.[1] With an apparent magnitude of +5.03, it is visible to the naked eye and its absolute magnitude of +4.29 implies a visual luminosity around 60% greater than the Sun. A solar analog, with a spectral type of G1V, it has a similar mass to that of the Sun but is slightly hotter at around 5,882 K.[3] and slightly more metal-rich with around 110% of the solar abundance of iron.
Like the Sun, 47 Ursae Majoris is on the main sequence, converting hydrogen to helium in its core by nuclear fusion. Based on its chromospheric activity, the star may be around six billion years old, though evolutionary models suggest an older age of around 8.7 billion years.[6] Other studies have yielded estimates of 4.4 and 7 billion years for the star.[9] The low level of magnetic activity makes it a Maunder Minimum candidate star.[10]
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"Stars Table". Catalog of Nearby Exoplanets. Archived from the original on 17 October 2008. Retrieved 2008-10-04.
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G. T. van Belle; K. von Braun (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085. S2CID 18370219.
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V. V. Kovtyukh; Soubiran, C.; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. arXiv:astro-ph/0308429. Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378. S2CID 18478960.
^ ab
C. Saffe; Gómez, M.; et al. (2005). "On the Ages of Exoplanet Host Stars". Astronomy and Astrophysics. 443 (2): 609–626. arXiv:astro-ph/0510092. Bibcode:2005A&A...443..609S. doi:10.1051/0004-6361:20053452. S2CID 11616693.
^"IAU Catalog of Star Names". Retrieved 28 July 2016.
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E. E. Mamajek; L. A. Hillenbrand (2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". Astrophysical Journal. 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785. S2CID 27151456.
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47UrsaeMajoris (abbreviated 47 UMa), formally named Chalawan /ˈtʃɑːləwən/, is a yellow dwarf star approximately 45.3 light-years from Earth in the constellation...
47UrsaeMajoris b (abbreviated 47 UMa b), formally named Taphao Thong /təˌpaʊ ˈtɒŋ/, is a gas planet and an extrasolar planet approximately 46 light-years...
47UrsaeMajoris d (sometimes abbreviated 47 Uma d) is an extrasolar planet approximately 46 light-years away in the constellation of Ursa Major. The planet...
and ranges between 7.75m and 8.48m. 47UrsaeMajoris is a Sun-like star with a three-planet system. 47UrsaeMajoris b, discovered in 1996, orbits every...
Iota UrsaeMajoris (ι UrsaeMajoris, abbreviated Iota UMa, ι UMa), also named Talitha /ˈtælɪθə/, is a star system in the northern circumpolar constellation...
Kappa UrsaeMajoris (κ UrsaeMajoris, abbreviated Kappa UMa, κ UMa) is a binary star in the constellation of Ursa Major. With a combined apparent magnitude...
Mu UrsaeMajoris (μ UrsaeMajoris, abbreviated Mu UMa, μ UMa), formally named Tania Australis /ˈteɪniə ɔːˈstreɪlɪs/, is a binary star in the constellation...
Sigma1 UrsaeMajoris (σ1 UMa) is the Bayer designation for a solitary star in the northern circumpolar constellation of Ursa Major. With an apparent visual...
BE UrsaeMajoris is a binary star system in the northern circumpolar constellation of Ursa Major, abbreviated BE UMa. The two components are an unusual...
4 UrsaeMajoris (sometimes abbreviated 4 UMa) is the Flamsteed designation of a star in the northern circumpolar constellation of Ursa Major. It also...
Nu UrsaeMajoris (ν UrsaeMajoris, abbreviated Nu UMa, ν UMa), formally named Alula Borealis /əˈluːlə bɒriˈælɪs/, is a double star in the northern circumpolar...
Alkaid /ælˈkeɪd/, also called Eta UrsaeMajoris (Latinised from η UrsaeMajoris, abbreviated Eta UMa, η UMa), is a star in the constellation of Ursa Major...
Chi UrsaeMajoris or χ UrsaeMajoris, formally named Taiyangshou /ˌtaɪˌjæŋˈʃoʊ/, is a single star in the northern circumpolar constellation of Ursa Major...
SW UrsaeMajoris is a cataclysmic binary star system in the northern circumpolar constellation of Ursa Major, abbreviated SW UMa. During quiescence it...
Age Message and 2003 Cosmic Call 2, for example, were sent to the 47UrsaeMajoris system, known to contain three Jupiter-mass planets and possibly with...
XY UrsaeMajoris is a short period binary star system in the northern circumpolar constellation of Ursa Major. It is an eclipsing binary with a baseline...
UX UrsaeMajoris is an Algol type binary star system in the northern circumpolar constellation of Ursa Major. It is classified as a nova-like variable...
nearby eccentric giant planet. 51 Pegasi b Tau Boötis b 55 Cancri b 47UrsaeMajoris b Upsilon Andromedae b List of exoplanets discovered before 2000 Sanders...
c UrsaeMajoris is the Bayer designation for a double-lined spectroscopic binary star system in the northern constellation of Ursa Major. It has an apparent...
Tau UrsaeMajoris (τ UMa) is the Bayer designation for a binary star in the northern circumpolar constellation of Ursa Major. It is visible to the naked...
ER UrsaeMajoris is a variable star in the northern circumpolar constellation of Ursa Major, abbreviated ER UMa. It is a prototype system for a subclass...
Major ε UrsaeMajoris A Alioth Member of the Big Dipper or the Plough (UK). /ˈæliɒθ/ Cygnus ε Cygni Aa Aljanah /ˈældʒənə/ Ursa Major η UrsaeMajoris Alkaid...
advertisement that was transmitted on June 12, 2008. The ad was beamed towards 47UrsaeMajoris, a distant star within the Ursa Major constellation that is orbited...
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