AB Aurigae
 AB Aurigae and its dust disk. |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 04h 55m 45.8445s |
| Declination | +30° 33′ 04.292″ |
| Apparent magnitude (V) | 7.05 |
| Characteristics | |
| Spectral type | A0Vpe |
| U−B color index | +0.04 |
| B−V color index | +0.11 |
| Variable type | Orion |
| Astrometry | |
| Radial velocity (Rv) | 8.90 ± 0.9 km/s |
| Proper motion (μ) |
RA: 2.63 mas/yr Dec.: -24.73 mas/yr |
| Parallax (π) | 7.18 ± 0.96mas |
| Distance | approx. 450 ly (approx. 140 pc) |
| Details | |
| Mass | 2.4 M☉ |
| Radius | 2.5 R☉ |
| Luminosity | 47 L☉ |
| Temperature | 9772 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
AB Aurigae is a star in the Auriga constellation. It is 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.
Oppenheimer et al. (2008) 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.
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