HD 23277

HD 23277
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 03h 49m 13.7393s[1]
Declination +70° 52′ 15.781″[1]
Apparent magnitude (V) 5.391 ± 0.009[2]
Characteristics
Spectral type kA2hA6VmA7[3]
U−B color index +0.12[4]
B−V color index +0.09[4]
Astrometry
Radial velocity (Rv)17 ± 0.9[5] km/s
Proper motion (μ) RA: 21.451(45) mas/yr[1]
Dec.: −62.431(55) mas/yr[1]
Parallax (π)8.7759 ± 0.0632 mas[1]
Distance372 ± 3 ly
(113.9 ± 0.8 pc)
Absolute magnitude (MV)+0.11
Orbit[6]
PrimaryHD 23277 A
CompanionHD 23277 B
Period (P)15.5132 d
Semi-major axis (a)43.0229 AU
Eccentricity (e)0.2210
Argument of periastron (ω)
(secondary)		287.41°
Argument of periastron (ω)
(primary)		107.41°
Semi-amplitude (K1)
(primary)		22.20 km/s
Semi-amplitude (K2)
(secondary)		24.69 km/s
Details
A
Mass2.38 ± 0.13[7] M☉
Radius3.55+0.16
−0.24[7] R☉
Luminosity59.7[8] L☉
Surface gravity (log g)3.72 ± 0.08[7] cgs
Temperature8,317+194
−189[7] K
Rotational velocity (v sin i)25 ± 5[9] km/s
Age610[10] Myr
B
Mass2.11[6] M☉
Rotational velocity (v sin i)25 ± 5[9] km/s
Other designations
BD+70°257, HD 23277, HIP 17854, HR 1138, SAO 5000
Database references
SIMBADdata

HD 23277 (HR 1138) is a spectroscopic binary[11] located in the northern circumpolar constellation Camelopardalis. With a combined apparent magnitude of 5.39,[2] it is faintly visible to the naked eye under ideal conditions. This star is located at a distance of 372 light years,[1] but is drifting away at a rate of 17 km/s.[5]

The primary has a classification of kA2hA6VmA7,[3] which indicates that it has the calcium K-line of an A2 star, but its hydrogen lines suggest a class of A6 V and metallic lines of an A7 star. At present it has 2.38 times the Sun's mass, and 3.55 times its radius.[7] It radiates at 59.7 times the luminosity of the Sun[8] from its photosphere at an effective temperature of 8,317 K,[7] which gives it a white hue. The companion has 2.11 times the Sun's mass,[6] which suggests it is an A-type main-sequence star like the primary. Both stars spin at a projected rotational velocity of 25 km/s, common for an Am star.[9]

  1. ^ a b c d e Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Kraicheva1980 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference AllendePreito1999 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Howe2009 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference DDR was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).