RX Andromedae

RX Andromedae

The visual band light curve of RX Andromedae, from AAVSO data[1]
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]
Distance649 ± 7 ly
(199 ± 2 pc)
Orbit
Period (P)5.075[7] hours
Details
White dwarf
Mass0.8[8] M☉
Surface gravity (log g)8.2[8] cgs
Temperature40,000 - 45,000[8] K
Rotational velocity (v sin i)200[8] km/s
Donor star
Surface gravity (log g)4.5[9] cgs
Temperature3,500[9] K
Metallicity+0.07[9]
Other designations
2MASS J01043553+4117577, TYC 2807-1623-1
Database references
SIMBADdata

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]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  3. ^ a b c d RX And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2009-06-30.
  4. ^ Cite error: The named reference TYCHO was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference rv was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference dr1 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference kaitchuk1989 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference sepinsky2002 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Harrison2018 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference schreiber2002 was invoked but never defined (see the help page).