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] |
Distance | 372 ± 3
ly (113.9 ± 0.8 pc) |
Absolute magnitude (MV) | +0.11 |
Orbit [6] | |
Primary | HD 23277 A |
Companion | HD 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 | |
Mass | 2.38 ± 0.13 [7] M☉ |
Radius | 3.55+0.16 −0.24 [7] R☉ |
Luminosity | 59.7 [8] L☉ |
Surface gravity (log g) | 3.72 ± 0.08 [7] cgs |
Temperature | 8,317+194 −189 [7] K |
Rotational velocity (v sin i) | 25 ± 5 [9] km/s |
Age | 610 [10] Myr |
B | |
Mass | 2.11 [6] M☉ |
Rotational velocity (v sin i) | 25 ± 5 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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]
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] |
Distance | 372 ± 3
ly (113.9 ± 0.8 pc) |
Absolute magnitude (MV) | +0.11 |
Orbit [6] | |
Primary | HD 23277 A |
Companion | HD 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 | |
Mass | 2.38 ± 0.13 [7] M☉ |
Radius | 3.55+0.16 −0.24 [7] R☉ |
Luminosity | 59.7 [8] L☉ |
Surface gravity (log g) | 3.72 ± 0.08 [7] cgs |
Temperature | 8,317+194 −189 [7] K |
Rotational velocity (v sin i) | 25 ± 5 [9] km/s |
Age | 610 [10] Myr |
B | |
Mass | 2.11 [6] M☉ |
Rotational velocity (v sin i) | 25 ± 5 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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]