Mu Capricorni

Mu Capricorni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension 21h 53m 17.77054s[1]
Declination −13° 33′ 06.3679″[1]
Apparent magnitude (V) +5.081[2]
Characteristics
Spectral type F2 V[3]
U−B color index +0.012[2]
B−V color index +0.367[2]
Astrometry
Proper motion (μ) RA: +311.22[1] mas/yr
Dec.: +13.46[1] mas/yr
Parallax (π)37.57 ± 0.67 mas[1]
Distance87 ± 2 ly
(26.6 ± 0.5 pc)
Absolute magnitude (MV)+2.96±0.04[4]
Details
Mass1.29[5] M☉
Radius1.8[6] R☉
Surface gravity (log g)4.28[5] cgs
Temperature6,892±234[5] K
Metallicity [Fe/H]−0.14[4] dex
Rotational velocity (v sin i)69.3±3.5[7] km/s
Age1.6±0.3[4] Gyr
Other designations
μ Cap, 51 Cap, BD−14° 6149, FK5 1577, Gl 838.5, HD 207958, HIP 108036, HR 8351, SAO 164713[8]
Database references
SIMBADdata

Mu Capricorni (μ Cap, μ Capricorni) is a solitary[9] star in the southern constellation of Capricornus. Based upon an annual parallax shift of 37.57 mas as seen from the Earth,[1] the star is located about 87 light years from the Sun. It is visible to the naked eye with an apparent visual magnitude of +5.081.[2]

It is a yellow-white hued, F-type main sequence star with a stellar classification of F2 V.[3] It is an estimated 1.6[4] billion years old and is spinning with a projected rotational velocity of 69 km/s.[7] The star has 1.29[5] times the mass of the Sun and around 1.8[6] times the Sun's radius, with an effective temperature of 6,892 K.[5]

In Chinese, 哭 (Kū), meaning Crying, refers to an asterism consisting of μ Capricorni and 38 Aquarii.[10] Consequently, the Chinese name for μ Capricorni itself is 哭一 (Kū yī, English: the First Star of Crying.).[11] From this Chinese name, the name Kuh has appeared.[12]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GutierrezMoreno1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Reiners2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ (in 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.
  11. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 5 日
  12. ^ Cite error: The named reference Allen1963 was invoked but never defined (see the help page).