Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation
Ursa Major
Right ascension
11h 46m 3.01407s[1]
Declination
+47° 46′ 45.8626″[1]
Apparent magnitude (V)
3.72[2]
Characteristics
Evolutionary stage
Horizontal branch[3]
Spectral type
K0.5 IIIb[4]
U−B color index
+1.16[2]
B−V color index
+1.18[2]
Astrometry
Radial velocity (Rv)
−9.02±0.20[2] km/s
Proper motion (μ)
RA: −138.29[1] mas/yr Dec.: 28.57[1] mas/yr
Parallax (π)
17.76 ± 0.16 mas[1]
Distance
184 ± 2 ly (56.3 ± 0.5 pc)
Absolute magnitude (MV)
0.10±0.02[5]
Details[2]
Mass
1.49[6]M☉
Radius
20.8±0.8[7]R☉
Luminosity
158 L☉
Surface gravity (log g)
2.2 cgs
Temperature
4,416±9 K
Metallicity [Fe/H]
−0.44 dex
Rotational velocity (v sin i)
2.3 km/s
Other designations
Alkaphrah[8], El Koprah[8], Taiyangshou, Chi UMa, χ UMa, 63 Ursae Majoris, BD+48°1966, FK5 441, HD 102224, HIP 57399, HR 4518, SAO 43886[9]
Database references
SIMBAD
data
Chi Ursae Majoris or χ Ursae Majoris, formally named Taiyangshou/ˌtaɪˌjæŋˈʃoʊ/,[10] is a single[11] star in the northern circumpolar constellation of Ursa Major. The star has an orange hue and is visible to the naked eye at night with an apparent visual magnitude of 3.72.[2] It is located at a distance of approximately 184 light-years from the Sun based on parallax, but is drifting closer with a radial velocity of −9 km/s.[2]
^ abcdeCite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
^ abcdefgCite error: The named reference Jennens1975 was invoked but never defined (see the help page).
^Cite error: The named reference Alves2000 was invoked but never defined (see the help page).
^Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
^Cite error: The named reference park2013 was invoked but never defined (see the help page).
^Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
^Cite error: The named reference Nordgren1999 was invoked but never defined (see the help page).
^ abCite error: The named reference Bakich1995 was invoked but never defined (see the help page).
^Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^"Naming Stars". IAU.org. Retrieved 16 December 2017.
^Cite error: The named reference Eggleton_Tokovinin_2008 was invoked but never defined (see the help page).
ChiUrsaeMajoris or χ UrsaeMajoris, formally named Taiyangshou /ˌtaɪˌjæŋˈʃoʊ/, is a single star in the northern circumpolar constellation of Ursa Major...
Herschel on February 5, 1788. It is located below the magnitude 3.7 star ChiUrsaeMajoris in Ursa Major. The Type IIn supernova SN 1998S is the only supernova...
Royal Psi UrsaeMajoris Ursa Major A single-star asterism in the Purple Forbidden enclosure 太陽守 Tài Yáng Shǒu Guard of the Sun ChiUrsaeMajoris Taiyangshou...
Detailed position of HR 4550 ( = Groombridge 1830; bottom-left edge) related to Chi UMa and Psi UMa. Observation data Epoch J2000 Equinox J2000 Constellation...
Lambda Aquilae Star 3.431 Chi Carinae Star 3.44 Eta Cassiopeiae Binary star system Suspected variable star 3.45 Lambda UrsaeMajoris Star 3.45 Eta Ceti Star...
it is classified as a rotating ellipsoidal variable and possibly a W UrsaeMajoris-type system, although not in physical contact. The components of this...
"Fundamental properties and atmospheric structure of the red supergiant VY Canis Majoris based on VLTI/AMBER spectro-interferometry". Astronomy and Astrophysics...
standstills are seen, part way between maximum and minimum brightness. SU UrsaeMajoris stars, which undergo both frequent small outbursts, and rarer but larger...