CR Ursae Majoris, BD+55 1634, HIP 67231, HD 120198, HR 5187, SAO 28885[10]
Database references
SIMBAD
data
84 Ursae Majoris, also known as HD 120198, is a star about 300 light years from the Earth, in the constellation Ursa Major.[2] It is a 5th magnitude star, making it faintly visible to the naked eye of an observer far from city lights. It is an Ap star with an 1,100 gauss magnetic field,[7] and an α2 CVn variable star, varying in brightness from magnitude 5.65 to 5.70, over a period of 1.37996 days.[3] 84 Ursae Majoris is located just 70 arcseconds from the star LDS 2914, but that star is believed to be a background star not physically associated with 84 Ursae Majoris.[11]
Gerhard Jackisch discovered that 84 Ursae Majoris is a variable star, with a period greater than one day, in 1972.[12] It was given the variable star designation CR Ursae Majoris in 1974.[13]
In 1994 John Rice and William Wehlau used Doppler imaging to map the distribution of iron and chromium on the surface of 84 Ursae Majoris. They found that the distribution of those elements across the surface was similar, and the abundances of those elements varied by a factor of 15 across the surface. Chromium was found to be about 600 times more abundant than on the Sun in the regions of the 84 Ursae Majoris surface with the minimum chromium abundance.[14]
The size of 84 Ursae Majoris was measured in red light during 2015 and 2016, using the CHARA array. The limb darkened angular diameter was 0.226±0.008 milliarcseconds.[4]
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background star not physically associated with 84UrsaeMajoris. Gerhard Jackisch discovered that 84UrsaeMajoris is a variable star, with a period greater...
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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...
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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...
AW UrsaeMajoris is a binary star system in the northern circumpolar constellation of Ursa Major, abbreviated AW UMa. It is an A-type W UrsaeMajoris variable...
78 UrsaeMajoris is a binary star system in the northern circumpolar constellation of Ursa Major. It is visible to the naked eye as a faint point of light...
1929, and designated AH Vir. This component was determined to be a W UrsaeMajoris variable, and an orbital period of 9.78 hours was found by F. Lause...
circumpolar constellation of Draco. It was a latter designation of 87 UrsaeMajoris, and is visible to the naked eye with an apparent visual magnitude of...
constellation Ursa Major. The closest star to the star system is CW UrsaeMajoris, at a distance of 5.3 light-years. The primary star, Gliese 414 A, is...
jovian in the 47 UrsaeMajoris system. In the novel, Coyote is a natural satellite of Bear, the fourth planet of the 47 UrsaeMajoris system, 46 light-years...
Pickering had found the first spectroscopic binary or double star, ζ1 UrsaeMajoris (Mizar A). Maury was asked to determine its orbit, which she did using...
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