RT Andromedae

RT Andromedae

RT Andromedae system.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 23h 11m 10.099s[1]
Declination +53° 01′ 33.04″[1]
Apparent magnitude (V) 9.043[2]
Characteristics
Spectral type F8-G0V + K1-3V [3]
Variable type RS CVn
Astrometry
Radial velocity (Rv)0.60±0.6[4] km/s
Proper motion (μ) RA: -7.01[1] mas/yr
Dec.: -20.80[1] mas/yr
Parallax (π)10.1267 ± 0.0424 mas[5]
Distance322 ± 1 ly
(98.7 ± 0.4 pc)
Absolute bolometric
magnitude (Mbol)		5.707 / 4.079[6]
Orbit[7][6]
Period (P)0.62893095 ± 0.00000009 d
Semi-major axis (a)0.01787 AU (3.839 R☉)
Eccentricity (e)0.0049 ± 0.0005
Inclination (i)87.26 ± 0.07°
Periastron epoch (T)JD 2436697.857
Details[6]
RT And A
Mass1.088 ± 0.030 M☉
Radius1.286 ± 0.011 R☉
Temperature6,150 ± 132 K
RT And B
Mass0.837 ± 0.030 M☉
Radius0.956 ± 0.012 R☉
Temperature4,780 K
Other designations
RT And, GSC 03998-02167, HIP 114484, TYC 3998-2167-1, BD+52° 3383a, GCRV 14555, 2MASS J23111009+5301330
Database references
SIMBADdata

RT Andromedae is a variable star in the constellation of Andromeda. The system is estimated to be 322 light-years (98.7 parsecs) away.[3]

The Infrared (K band) light curve of RT Andromedae plotted from data presented in Arévalo & Lázaro (1995)[8]

RT Andromedae is classified as a RS Canum Venaticorum variable, a type of close eclipsing binary star. It varies from an apparent visual magnitude of 9.83 at minimum brightness to a magnitude of 8.97 at maximum brightness, with a period of 0.6289216 days.[9] The system consists of a G-type main-sequence star slightly more massive than the Sun, and a K-type main-sequence star slightly less massive; the light curve of this eclipsing binary exhibits secular variations of period and minima.[3]

  1. ^ a b c d Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. ^ a b c Cite error: The named reference Pribulla was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference mnras_3_349 was invoked but never defined (see the help page).
  5. ^ 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.
  6. ^ a b c Cite error: The named reference Manzoori was invoked but never defined (see the help page).
  7. ^ Erdem, A.; Demircan, O.; Güre, M. (2001). "The light and period changes of RT Andromedae". Astronomy & Astrophysics. 379 (3): 878. Bibcode:2001A&A...379..878E. doi:10.1051/0004-6361:20011357.
  8. ^ Cite error: The named reference Arevalo was invoked but never defined (see the help page).
  9. ^ RT 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 2009-06-22.