Psi Capricorni

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ψ Capricorni
Observation data
Epoch J2000      Equinox J2000
Constellation Capricornus
Right ascension 20h 46m 05.73s
Declination –25° 16′ 15.2″
Apparent magnitude (V) 4.15
Characteristics
Spectral type F5 V[1]
U−B color index 0.00
B−V color index 0.42
Variable type None
Astrometry
Radial velocity (Rv) 25.8 km/s
Proper motion (μ) RA: -51.38 mas/yr
Dec.: -156.66 mas/yr
Parallax (π) 68.16 ± 0.91 mas
Distance 47.9 ± 0.6 ly
(14.7 ± 0.2 pc)
Absolute magnitude (MV) 3.32
Details
Age 1.4[1] Gyr
Other designations
psi Cap, 16 Capricorni, 16 Cap, Gl 805, HR 7936, CD −25°15018, HD 197692, GCTP 4947.00, SAO 189664, FK5 779, GC 28929, HIP 102485.

Psi Capricorni (ψ Cap, ψ Capricorni) is a star in the constellation Capricornus. ψ Capricorni is a yellow-white F-type main sequence dwarf with an apparent magnitude of +4.13. It is approximately 47.9 light years from Earth. The measured rotational velocity of this star is approximately 37 km/s (the Sun has an equatorial rotation velocity of 2 km/s).

Chinese name[edit]

In Chinese, 天田 (Tiān Tián), meaning Celestial Farmland, refers to an asterism consisting of ψ Capricorni, ω Capricorni, 3 Piscis Austrini, and 24 Capricorni.[2] Consequently, ω Capricorni itself is known as 天田四 (Tiān Tián sì, English: the Fourth Star of Celestial Farmland.)[3]

In R. H. Allen's version, this star was represent the state Yue.[4]

References[edit]

  1. ^ a b Ehrenreich, D. et al. (November 2010), Deep infrared imaging of close companions to austral A- and F-type stars, Astronomy and Astrophysics 523: A73, arXiv:1007.0002, Bibcode:2010A&A...523A..73E, doi:10.1051/0004-6361/201014763  |first4= missing |last4= in Authors list (help)
  2. ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  3. ^ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日
  4. ^ Star Names - R.H.Allen p.142

External links[edit]

  • "HD 197692 -- Star". SIMBAD: Centre de Données astronomiques de Strasbourg. Retrieved 2006-08-16. 
  • "4C01688". ARICNS. 1998-03-04. Retrieved 2006-08-16.