36 Capricorni

This article is about b Capricorni. Not to be confused with β Capricorni.
36 Capricorni
Observation data
Epoch J2000      Equinox J2000
Constellation Capricornus
Right ascension 21h 28m 43.40070s[1]
Declination −21° 48′ 25.8504″[1]
Apparent magnitude (V) +4.50[2]
Characteristics
Spectral type G7IIIb Fe–1[3]
B−V color index 0.889[1]
Astrometry
Radial velocity (Rv)−20.8±0.9[4] km/s
Proper motion (μ) RA: +134.83 mas/yr[1]
Dec.: −5.73 mas/yr[1]
Parallax (π)19.06 ± 0.29 mas[1]
Distance171 ± 3 ly
(52.5 ± 0.8 pc)
Absolute magnitude (MV)0.811[5]
Details[6]
Mass2.26±0.19 M☉
Radius8.59±0.07 R☉
Luminosity43.15±0.69 L☉
Surface gravity (log g)2.96±0.10 cgs
Temperature5,047±5 K
Metallicity [Fe/H]−0.01±0.10 dex
Age770±170 Myr
Other designations
b Cap, 36 Cap, BD−22° 5692, HD 204381, HIP 106039, HR 8213, SAO 190374[7]
Database references
SIMBADdata

36 Capricorni is a single,[8] yellow-hued star in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.50.[2] The distance to this star, as determined from an annual parallax shift of 19.06±0.29 mas,[1] is around 171 light years. It is currently moving closer with a heliocentric radial velocity of −21 km/s, and will come within 145 ly (44.58 pc) in about 685,000 years ago.[4]

This is an evolved G-type giant star with a stellar classification of G7IIIb Fe–1,[3] where the suffix notation indicates an underabundance of iron found in the spectrum. At the age of 770 million years it has become a red clump giant, meaning it is generating energy through helium fusion at its core. It has 2.26 times the mass of the Sun, but has expanded to 8.6 times its radius. It is radiating 43 times the Sun's luminosity from its photosphere at an effective temperature of 5,047 K.[6]

  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 Cite error: The named reference aaa454_3_943 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Liu2007 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gallenne2018 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).