Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
A | |
Right ascension | 06h 39m 33.12003s [2] |
Declination | +28° 15′ 47.2764″ [2] |
Apparent magnitude (V) | 6.22 [3] |
B | |
Right ascension | 06h 39m 33.11965s [2] |
Declination | +28° 15′ 47.2740″ [2] |
Apparent magnitude (V) | 7.82 [3] |
Characteristics | |
Spectral type | B7 III [4] |
B−V color index | −0.087±0.007 [5] |
Variable type | Algol [6] |
Astrometry | |
A | |
Radial velocity (Rv) | +19.0±4.3 [5] km/s |
Proper motion (μ) |
RA: −5.461
[2]
mas/
yr Dec.: −10.523 [2] mas/ yr |
Parallax (π) | 3.5961 ± 0.0952 mas [2] |
Distance | 910 ± 20
ly (278 ± 7 pc) |
Details | |
54 Aur A | |
Luminosity | 315.49 [7] L☉ |
Temperature | 11,083 [7] K |
Rotational velocity (v sin i) | 65 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
54 Aurigae is a multiple star system located around 800 light-years (51,000,000 AU) away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 6.02. [5] The system is moving further from the Sun with a heliocentric radial velocity of around +19 km/s. [5]
54 Aurigae is resolved into two visible components, of magnitudes 6.22 and 7.82, separated by 0.8 ″. The double was discovered in 1843 when the separation was only 0.7″. [10] There is no separate measure of the parallax of the secondary, but it shares a common proper motion with the brighter star [11] and they are assumed to form a binary. [10] The spectral class B7 III is assigned to the brighter of the pair, indicating a hot giant star, although it has also been given as B7/8 III/V, suggesting it may be a main sequence star. [12] Most sources can't give a separate spectral classification for the fainter star, but it has been listed as DA1/K4V, indicating it is either a white dwarf or red dwarf. [13]
The brighter component of the visible pair is an eclipsing binary with a period of 1.8797 days, and a primary eclipse depth of 0.03 magnitudes. [14] It is radiating 315 times the luminosity of the Sun from its photosphere at an effective temperature of 11,083 K (10,810 °C; 19,490 °F), [7] and is spinning with a projected rotational velocity of 65 kilometres per second (40 mi/s). [8]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
A | |
Right ascension | 06h 39m 33.12003s [2] |
Declination | +28° 15′ 47.2764″ [2] |
Apparent magnitude (V) | 6.22 [3] |
B | |
Right ascension | 06h 39m 33.11965s [2] |
Declination | +28° 15′ 47.2740″ [2] |
Apparent magnitude (V) | 7.82 [3] |
Characteristics | |
Spectral type | B7 III [4] |
B−V color index | −0.087±0.007 [5] |
Variable type | Algol [6] |
Astrometry | |
A | |
Radial velocity (Rv) | +19.0±4.3 [5] km/s |
Proper motion (μ) |
RA: −5.461
[2]
mas/
yr Dec.: −10.523 [2] mas/ yr |
Parallax (π) | 3.5961 ± 0.0952 mas [2] |
Distance | 910 ± 20
ly (278 ± 7 pc) |
Details | |
54 Aur A | |
Luminosity | 315.49 [7] L☉ |
Temperature | 11,083 [7] K |
Rotational velocity (v sin i) | 65 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
54 Aurigae is a multiple star system located around 800 light-years (51,000,000 AU) away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 6.02. [5] The system is moving further from the Sun with a heliocentric radial velocity of around +19 km/s. [5]
54 Aurigae is resolved into two visible components, of magnitudes 6.22 and 7.82, separated by 0.8 ″. The double was discovered in 1843 when the separation was only 0.7″. [10] There is no separate measure of the parallax of the secondary, but it shares a common proper motion with the brighter star [11] and they are assumed to form a binary. [10] The spectral class B7 III is assigned to the brighter of the pair, indicating a hot giant star, although it has also been given as B7/8 III/V, suggesting it may be a main sequence star. [12] Most sources can't give a separate spectral classification for the fainter star, but it has been listed as DA1/K4V, indicating it is either a white dwarf or red dwarf. [13]
The brighter component of the visible pair is an eclipsing binary with a period of 1.8797 days, and a primary eclipse depth of 0.03 magnitudes. [14] It is radiating 315 times the luminosity of the Sun from its photosphere at an effective temperature of 11,083 K (10,810 °C; 19,490 °F), [7] and is spinning with a projected rotational velocity of 65 kilometres per second (40 mi/s). [8]