QX Andromedae

QX Andromedae
Location of QX Andromedae (circled) in NGC 752
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 01h 57m 57.7818s[1]
Declination +37° 48′ 22.4500″[1]
Apparent magnitude (V) 11.28 – 11.5 variable[2]
Characteristics
Spectral type F6[2]
Apparent magnitude (B) 11.77[3]
Apparent magnitude (R) 11.23[3]
Apparent magnitude (G) 11.2929[1]
Apparent magnitude (J) 10.393[4]
Apparent magnitude (H) 10.225[4]
Apparent magnitude (K) 10.163[4]
Variable type W UMa[2]
Astrometry
Radial velocity (Rv)11.70±0.27[5] km/s
Proper motion (μ) RA: 10.016±1.295 [1] mas/yr
Dec.: −11.926±0.281[1] mas/yr
Parallax (π)2.2376 ± 0.0676 mas[1]
Distance1,460 ± 40 ly
(450 ± 10 pc)
Orbit[6]
Period (P)0.4121716 days
Semi-major axis (a)2.89±0.04 M☉
Inclination (i)54.6±0.2°
Details[6]
Primary
Mass1.47±0.05 M☉
Radius1.46±0.02 R☉
Surface gravity (log g)4.27±0.03 cgs
Temperature6,440 K
Age1.34±0.06[7] Gyr
Secondary
Mass0.45±0.02 M☉
Radius0.88±0.02 R☉
Surface gravity (log g)4.20±0.03 cgs
Temperature6420±20 K
Age1.34±0.06[7] Gyr
Other designations
2MASS J01575777+3748224, RX J015758.0+374820, TYC 2816-1950-1
Database references
SIMBADdata

QX Andromedae (often abbreviated to QX And) is an eclipsing binary in the constellation Andromeda. It varies from a maximum apparent visual magnitude of 11.28 to a minimum of 11.50. Since it is impossible to specify the onset time of the eclipses, it is classified as a W Ursae Majoris variable star.[2] It is also observed as an X-ray source[8] and is a member of the open cluster NGC 752.[7]

  1. ^ a b c d e f 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. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d Cite error: The named reference GCVS was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference SuperWASP was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference 2MASS Cat 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 aaa_525 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Agüeros2018 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Belloni1996 was invoked but never defined (see the help page).