Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Camelopardalis |
Right ascension | 13h 12m 25.43269s [1] |
Declination | +80° 28′ 16.7089″ [1] |
Apparent magnitude (V) | 6.25 [2] (6.33 + 9.04) [3] |
Characteristics | |
Spectral type | G8 III + A8 V: [4] |
B−V color index | +0.94 [2] |
Astrometry | |
Radial velocity (Rv) | −9.38±0.21 [5] km/s |
Proper motion (μ) |
RA: −6.288
mas/
yr
[1] Dec.: +10.446 mas/ yr [1] |
Parallax (π) | 4.6717 ± 0.0166 mas [1] |
Distance | 698 ± 2
ly (214.1 ± 0.8 pc) |
Absolute magnitude (MV) | −0.32 [6] |
Details | |
A | |
Mass | 3.4 [1] M☉ |
Radius | 16.4 [1] R☉ |
Luminosity | 161 [1] L☉ |
Surface gravity (log g) | 2.38 [1] cgs |
Temperature | 5,160 [1] K |
Metallicity [Fe/H] | −0.13 [1] dex |
Rotational velocity (v sin i) | <1 [7] km/s |
Age | 270 [1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 115337 is a binary star located in the northern circumpolar constellation Camelopardalis. The pair have a combined apparent magnitude of 6.25, [2] placing it near the limit for naked eye visibility. Parallax measurements place the system at a distance of 698 light years. [1] It has a heliocentric radial velocity of −9.4 km/s, [5] indicating that it is drifting towards the Solar System.
The components have spectral classifications of K0 Ib [9] and A8 V, [4] indicating a K-type lower luminosity supergiant and an A-type main-sequence star (with uncertainty). At present the primary has 3.4 times the mass of the Sun and an enlarged radius of 16.4 R☉ due to its evolved status. It radiates 161 times the luminosity of the Sun from its photosphere at an effective temperature of 5,160 K, [10] giving a yellowish orange hue. HD 115337A is metal deficient, having an iron abundance only 74% of solar levels. Like most giants, it spins slowly with a projected rotational velocity of less than 1 km/s. [7]
Ironically, the characteristics of HD 115337A belong to a giant star as opposed to a supergiant. It has even been classified as G5 III [11] or G8 III, [4] more consistent with the above properties. Nevertheless, optical measurements from Mason et al. (2001) find the pair to have a mean separation of an arcsecond along a position angle of 184°. [12]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Camelopardalis |
Right ascension | 13h 12m 25.43269s [1] |
Declination | +80° 28′ 16.7089″ [1] |
Apparent magnitude (V) | 6.25 [2] (6.33 + 9.04) [3] |
Characteristics | |
Spectral type | G8 III + A8 V: [4] |
B−V color index | +0.94 [2] |
Astrometry | |
Radial velocity (Rv) | −9.38±0.21 [5] km/s |
Proper motion (μ) |
RA: −6.288
mas/
yr
[1] Dec.: +10.446 mas/ yr [1] |
Parallax (π) | 4.6717 ± 0.0166 mas [1] |
Distance | 698 ± 2
ly (214.1 ± 0.8 pc) |
Absolute magnitude (MV) | −0.32 [6] |
Details | |
A | |
Mass | 3.4 [1] M☉ |
Radius | 16.4 [1] R☉ |
Luminosity | 161 [1] L☉ |
Surface gravity (log g) | 2.38 [1] cgs |
Temperature | 5,160 [1] K |
Metallicity [Fe/H] | −0.13 [1] dex |
Rotational velocity (v sin i) | <1 [7] km/s |
Age | 270 [1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 115337 is a binary star located in the northern circumpolar constellation Camelopardalis. The pair have a combined apparent magnitude of 6.25, [2] placing it near the limit for naked eye visibility. Parallax measurements place the system at a distance of 698 light years. [1] It has a heliocentric radial velocity of −9.4 km/s, [5] indicating that it is drifting towards the Solar System.
The components have spectral classifications of K0 Ib [9] and A8 V, [4] indicating a K-type lower luminosity supergiant and an A-type main-sequence star (with uncertainty). At present the primary has 3.4 times the mass of the Sun and an enlarged radius of 16.4 R☉ due to its evolved status. It radiates 161 times the luminosity of the Sun from its photosphere at an effective temperature of 5,160 K, [10] giving a yellowish orange hue. HD 115337A is metal deficient, having an iron abundance only 74% of solar levels. Like most giants, it spins slowly with a projected rotational velocity of less than 1 km/s. [7]
Ironically, the characteristics of HD 115337A belong to a giant star as opposed to a supergiant. It has even been classified as G5 III [11] or G8 III, [4] more consistent with the above properties. Nevertheless, optical measurements from Mason et al. (2001) find the pair to have a mean separation of an arcsecond along a position angle of 184°. [12]