AB Aurigae
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Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Auriga |
Right ascension | 04h 55m 45.8445s |
Declination | +30° 33′ 04.292″ |
Apparent magnitude (V) | 7.06 |
Characteristics | |
Spectral type | A0Vpe |
U−B color index | 0.04 |
B−V color index | 0.11 |
Variable type | Orion variable |
Astrometry | |
Radial velocity (Rv) | 8 km/s |
Proper motion (μ) | RA: 1.71 mas/yr Dec.: -24.24 mas/yr |
Parallax (π) | 6.93 ± 0.95 mas |
Distance | approx. 470 ly (approx. 140 pc) |
Absolute magnitude (MV) | 7.18 |
Details | |
Mass | 3.1 M☉ |
Radius | 2.1 R☉ |
Luminosity | 40 L☉ |
Temperature | 7,500–10,000 K |
Age | 3 ± 4 million years |
Other designations | |
Database references | |
SIMBAD | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
AB Aurigae is a star in the Auriga constellation. It is better known for hosting a dust disk that may harbour a condensing planet or brown dwarf. The star could host a possible substellar companion in wide orbit.
Planetary System
Oppenheimer et al. (2008)[1] observed an annulus feature in AB Aurigae's dust disk between 43 and 302 AU from the star, a region never seen before. An azimuthal gap in an annulus of dust at a radius of 102 AU would suggest the formation of at least one small body at an orbital distance of nearly 100 AU. Such object could turn out either a massive planetary companion or more likely a brown dwarf companion, in both cases located at nearly 100 AU from the bright star. So far the object is unconfirmed.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (unconfirmed) | ≥5–37 MJ | 102 | ≥800 | ? | — | — |
See also
References
Further reading
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External links
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