Xi2 Ceti

Xi² Ceti

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Cetus
Right ascension	02^h 28^m 09.543^s[1]
Declination	+08° 27′ 36.20″[1]
Apparent magnitude (V)	+4.28
Characteristics
Spectral type	B9III [2]
Astrometry
Proper motion (μ)	RA: 41.80 ± 1.42[1] mas/yr Dec.: –13.55 ± 0.91[1] mas/yr
Parallax (π)	16.89 ± 1.21[1] mas
Distance	190 ± 10 ly (59 ± 4 pc)
Absolute magnitude (MV)	+0.639[2]
Details
Mass	4[2] M☉
Radius	2.6[2] R☉
Luminosity	74[2] L☉
Temperature	10630 ± 400[3] K
Age	225 Million[2] years
Other designations
73 Ceti, HD 15318, HR 718 , HIP 11484
Database references
SIMBAD	data
Exoplanet Archive	data

Xi² Ceti (ξ² Ceti), is a star located in the constellation Cetus.

In Chinese, 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, Xi² Ceti itself is known as the Sixth Star of Circular Celestial Granary, Tiān Qūn Liù.^[4]

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
2. Jim Kaler (Dec 17, 2007). "Xi-2 Ceti".
3. Zorec, J.; et al. (2009). "Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ_1, D) parameters into Teff". Astronomy and Astrophysics 501 (1): 297–320. arXiv:0903.5134. Bibcode:2009A&A...501..297Z. doi:10.1051/0004-6361/200811147.
4. (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日

• http://server3.wikisky.org/starview?object_type=1&object_id=889
• http://www.alcyone.de/cgi-bin/search.pl?object=HR0718