Xi2 Ceti
02h28m 09.55706s[1]
+08° 27′ 36.2168″[1]
+4.279[2]
Characteristics
U−B color index
−0.137[5]
B−V color index
−0.053±0.003[5]
Radial velocity (Rv)
11.90±1.3[6] km/s
Proper motion (μ)
RA: 23.707±0.844[1] mas/yr
Dec.: −4.787±0.778[1] mas/yr
Parallax (π)
Absolute magnitude (MV)
+0.45[5]
Details
Surface gravity (log g)
Metallicity [Fe/H]
Rotational velocity (v sin i)
55[7] km/s
Database references
Xi2 Ceti, Latinized from ξ2 Ceti, is a star located in the equatorial constellationofCetus. It is visible to the naked eye with an apparent visual magnitude of +4.3.[2] This star is located at a distance of approximately 197 light years from the Sun based on parallax, and is drifting further away with a radial velocity of 12 km/s.[6] It made its closest approach some 2.7 million years ago at a distance of around 128 light-years.[5]
Xi2 Ceti is a spectrophotometric standard star.[2] It displays a stellar classification of B9.5III,[3] which suggests it has exhausted its core hydrogen, evolved away from the main sequence, and expanded to become a giant star, although still only 127 million years old.[7] It has 2.45[7] times the mass and 2.6[8] times the radius of the Sun.
InChinese, 天囷 (Tiān Qūn), meaning Circular Celestial Granary, refers to an asterism consisting of α Ceti, κ1 Ceti, λ Ceti, μ Ceti, ξ1 Ceti, ξ2 Ceti, ν Ceti, γ Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti and 66 Ceti. Consequently, the Chinese name for Xi2 Ceti itself is "the Sixth Star of Circular Celestial Granary", Tiān Qūn Liù.[10]
Other
Other
