| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 01h 27m 26.6729s[2] |
| Declination | +41° 06′ 04.178″[2] |
| Apparent magnitude (V) | 6.46[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | Am(kA5/hF1/mF2)[4] |
| U−Bcolor index | 0.03[3] |
| B−Vcolor index | 0.27[3] |
| V−Rcolor index | 0.26[3] |
| R−Icolor index | 0.16[3] |
| Variable type | γ Doradus andδ Scuti[5] |
| Astrometry | |
| Radial velocity (Rv) | 0.8±0.3[1] km/s |
| Proper motion (μ) | RA: 9.611±0.030[2]mas/yr Dec.: 25.910±0.024[2]mas/yr |
| Parallax (π) | 18.7624±0.0298 mas[2] |
| Distance | 173.8 ± 0.3 ly (53.30 ± 0.08 pc) |
| Absolute magnitude (MV) | +2.68[1] |
| Details | |
| Mass | 1.55±0.1[1] M☉ |
| Radius | 1.7±0.1[1] R☉ |
| Luminosity | 6.5±0.6[1] L☉ |
| Surface gravity (log g) | 4.1±0.2[5] cgs |
| Temperature | 7560±180[5] K |
| Metallicity | +0.11[6] |
| Rotational velocity (v sin i) | 53.1±0.5[5] km/s |
| Age | 727[2] Myr |
| Other designations | |
| HD 8801,HIP 6794,SAO 37227,PPM 44004,HR 418,HD 8801,BD+40°289 | |
| Database references | |
| SIMBAD | data |
V529 Andromedae, also known as HD 8801, is avariable star in theconstellation of Andromeda. It has a 13th magnitude visual companion star 15" away, which is just a distant star on the same line of sight.
It is also anAm star with aspectral classification Am(kA5/hF1/mF2), meaning that it has thecalcium K line of a star with spectral type A5, theBalmer series of a F1 star, and metallic lines of an F2 star.[4]
The variable brightness of V529 Andromedae was first detected in theHipparcos satellite data. It was classified as an "unsolved variable" (meaning it could not be placed into any specific variable star category) in theHipparcos catalog released in 1997.[7] The star's variability was confirmed in a study published byGregory W. Henry and Francis C. Fekel in 2005,[1] and the star was given itsvariable star designation in 2011.[8]
V529 Andromedae was the first star known to combineGamma Doradus andDelta Scuti type pulsations.[1] Nine different pulsation frequencies have been observed, and three of them could arise from a previously unknown stellar pulsation mode.[9]
V529 Andromedae has a 13th magnitude companion about15″ away.[10] It is a far more distant star than V529 Andromedae, only coincidentally aligned in the sky.[11]
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