Phi Capricorni

Phi Capricorni
Location of φ Capricorni (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension 21h 15m 37.89982s[1]
Declination −20° 39′ 06.1032″[1]
Apparent magnitude (V) +5.16[2]
Characteristics
Spectral type K0 II-III[3]
B−V color index +1.15[2]
Astrometry
Radial velocity (Rv)−4.5±0.5[4] km/s
Proper motion (μ) RA: +15.01[1] mas/yr
Dec.: −2.07[1] mas/yr
Parallax (π)5.07 ± 0.25 mas[1]
Distance640 ± 30 ly
(197 ± 10 pc)
Absolute magnitude (MV)−1.16±0.107[5]
Details
Mass2.63[6] M☉
Luminosity447[6] L☉
Surface gravity (log g)1.77[5] cgs
Temperature4,490±25[6] K
Metallicity [Fe/H]−0.15[5] dex
Rotational velocity (v sin i)3.8[7] km/s
Age1.24[6] Gyr
Other designations
φ Cap, 28 Cap, BD−21°5974, HD 202320, HIP 104963, HR 8127, SAO 190173[8]
Database references
SIMBADdata

Phi Capricorni (φ Cap, φ Capricorni) is a solitary[9] star in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +5.16.[2] Based upon an annual parallax shift of 5.07 mas as seen from the Earth,[1] the star is located about 640 light years from the Sun, give or take 30 light years.

This is an evolved, orange-hued K-type giant/bright giant star with a stellar classification of K0 II-III[3] It shows an infrared excess, which may be due to leftover material from a mass-loss event.[7] The star has an estimated 2.63 times the mass of the Sun,[6] and radiates 447 times the solar luminosity from its photosphere at an effective temperature of 4,490 K.[6] Phi Capricorni is around 1.24[6] billion years old and is spinning with a projected rotational velocity of 3.8 km/s.[7]

  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 Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1988 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference park2013 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Fekel1998 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).