DX Andromedae
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Right ascension23h 29m 46.6839s[2]
Declination+43° 45′ 04.034″[2]
Apparentmagnitude(V)11.0 – 15.5 variable [3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 29m 46.6839s[2] |
| Declination | +43° 45′ 04.034″[2] |
| Apparent magnitude (V) | 11.0 – 15.5 variable [3] |
| Characteristics | |
| Spectral type | pec(UG)[3] (K1 V[4]) |
| Apparent magnitude (B) | 11.00[5] |
| Apparent magnitude (G) | 14.7821[2] |
| Apparent magnitude (J) | 13.106[6] |
| Apparent magnitude (H) | 12.512[6] |
| Apparent magnitude (K) | 12.390[6] |
| Variable type | Dwarf nova |
| Astrometry | |
| Radial velocity (Rv) | -2[5] km/s |
| Proper motion (μ) | RA: −8.343±0.035[2] mas/yr Dec.: −9.835±0.030[2] mas/yr |
| Parallax (π) | 1.6685±0.0249 mas[2] |
| Distance | 1,950 ± 30 ly (599 ± 9 pc) |
| Orbit | |
| Period (P) | 10.6 hours[7] |
| Inclination (i) | 45[8]° |
| Details[8] | |
| White Dwarf | |
| Mass | 0.8 (assumed) M☉ |
| Temperature | 25,000 K |
| Donor star | |
| Surface gravity (log g) | 4.0 cgs |
| Temperature | 5,000 K |
| Metallicity [Fe/H] | 0 dex |
| Rotational velocity (v sin i) | 79±5 km/s |
| Other designations | |
| 2MASS J23294667+4345040 | |
| Database references | |
| SIMBAD | data |
DX Andromedae (often abbreviated to DX And) is a cataclysmic variable star in the constellation Andromeda. It has a typical apparent visual magnitude of 15.5 during the quiescent phase, but becomes brighter (up to a magnitude of 11.0) during outbursts recurring with a mean cycle length of 330 days,[7] thus is classified as a dwarf nova of the SS Cygni type.[3]
