RX Andromedae
Cataclysmic variable star system in the constellation Andromeda / From Wikipedia, the free encyclopedia
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RX Andromedae is a variable star in the constellation of Andromeda. Although it is classified as a dwarf nova of the Z Camelopardalis (UGZ) type, it has shown low-luminosity periods typical of VY Sculptoris stars.[10] However, for most of the time it varies from an apparent visual magnitude of 15.1 at minimum brightness to a magnitude of 10.2 at maximum brightness, with a period of approximately 13 days.[3]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 01h 04m 35.53730s[2] |
Declination | +41° 17′ 57.78369″[2] |
Apparent magnitude (V) | 10.2 to 15.1[3] |
Characteristics | |
Spectral type | pec(UG)[3] |
B−V color index | -0.4556[4] |
Variable type | UGZ[3] |
Astrometry | |
Radial velocity (Rv) | -12[5] km/s |
Proper motion (μ) | RA: 1.217 ± 2.221[6] mas/yr Dec.: -22.225 ± 0.699 [6] mas/yr |
Parallax (π) | 5.0276 ± 0.0507 mas[2] |
Distance | 649 ± 7 ly (199 ± 2 pc) |
Orbit | |
Period (P) | 5.075[7] hours |
Details | |
White dwarf | |
Mass | 0.8[8] M☉ |
Surface gravity (log g) | 8.2[8] cgs |
Temperature | 40,000 - 45,000[8] K |
Rotational velocity (v sin i) | 200[8] km/s |
Donor star | |
Surface gravity (log g) | 4.5[9] cgs |
Temperature | 3,500[9] K |
Metallicity | +0.07[9] |
Other designations | |
Database references | |
SIMBAD | data |
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