HD 10800

HD 10800
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Octans
Right ascension 01h 37m 55.5567s[1]
Declination −82° 58′ 29.9867″[1]
Apparent magnitude (V) 5.87[2]
Characteristics
Spectral type G1 V[3]
U−B color index +0.10[2]
B−V color index +0.61[2]
Astrometry
Radial velocity (Rv)−1.1±0.4[4] km/s
Proper motion (μ) RA: +122.526 mas/yr[1]
Dec.: +120.827 mas/yr[1]
Parallax (π)37.0128 ± 0.229 mas[1]
Distance88.1 ± 0.5 ly
(27.0 ± 0.2 pc)
Absolute magnitude (MV)+3.69[5]
Orbit[6]
PrimaryAa
CompanionAb
Period (P)19.371 d
Eccentricity (e)0.103±0.001
Periastron epoch (T)2,456,938.6±0.02 JD
Argument of periastron (ω)
(primary)		243±0.4°
Semi-amplitude (K1)
(primary)		36.45±0.04 km/s
Semi-amplitude (K2)
(secondary)		43.32±0.05 km/s
Orbit[6]
PrimaryA
CompanionB
Period (P)1.7486±0.0005 yr
Semi-major axis (a)7.823±0.047 mas
Eccentricity (e)0.191±0.002
Inclination (i)47.6±0.5°
Periastron epoch (T)2,456,903.42±0.94 JD
Argument of periastron (ω)
(primary)		151.2±0.3°
Semi-amplitude (K1)
(primary)		9.1±0.03 km/s
Semi-amplitude (K2)
(secondary)		17.9±0.05 km/s
Details
Aa
Mass1.09[7] M☉
Radius1.1[8] R☉
Luminosity1.82±0.04[9] L☉
Surface gravity (log g)5[10] cgs
Temperature5,802[11] K
Metallicity [Fe/H]−0.09±0.11[12] dex
Rotational velocity (v sin i)7[7] km/s
Age5.01±4.51[9] Gyr
Ab
Mass0.64[13] M☉
B
Mass1±0.1[9] M☉
Luminosity0.98+0.25
−0.20[9] L☉
Temperature5,741[7] K
Age4.79+1.24
−0.98[9] Gyr
Other designations
3 G. Octantis[14], CPD−83°27, GC 2063, GJ 67.1, HD 10800, HIP 7601, HR 512, SAO 258271, WDS J01379-8259AB[15]
Database references
SIMBADdata

HD 10800, also known as HR 512 or Gliese 67.1, is a triple star located in the southern circumpolar constellation Octans. It has a combined apparent magnitude of 5.87,[2] allowing it to be faintly seen with the naked eye. The system is relatively close at a distance of 88.1 light years[1] but is drifting closer with a heliocentric radial velocity −1.1 km/s.[4]

The system has a blended spectral classification of G1 V,[3] indicating an ordinary G-type main-sequence star. The primary is a spectroscopic binary consisting of a G-type and K-type star circling around each other in 19 days.[6] HD 10800B has a class of G2 V,[9] the same spectral class as our own Sun. The AB pair take 1.7 years to orbit each other.[6]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Torres2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Tokovinin2016 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Nordstrom2004 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference PF2001 was invoked but never defined (see the help page).
  9. ^ a b c d e f Cite error: The named reference Piccotti2020 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Piters1998 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Rocha-Pinto1998 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Netopil2017 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Tokovinin2014 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference GouldNEW was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).