13 Andromedae

13 Andromedae

The visual band light curve of 13 Andromedae, adapted from Adelman (2005)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 23h 27m 07.40s[2]
Declination +42° 54′ 43.2″[2]
Apparent magnitude (V) 5.75[3]
Characteristics
Spectral type B9 III or B9 Mn[4]
B−V color index −0.007±0.004[3]
Variable type α2 CVn[5]
Astrometry
Radial velocity (Rv)−8.1±1.6[6] km/s
Proper motion (μ) RA: 87.05[2] mas/yr
Dec.: 16.54[2] mas/yr
Parallax (π)10.87 ± 0.30 mas[2]
Distance300 ± 8 ly
(92 ± 3 pc)
Absolute magnitude (MV)0.98[7]
Details
Luminosity42.89[3] L☉
Rotational velocity (v sin i)75[8] km/s
Age345[7] Myr
Other designations
13 And, V388 Andromedae, BD+42° 4672, HD 220885, HIP 115755, HR 8913, SAO 53039, PPM 64250[9]
Database references
SIMBADdata

13 Andromedae, abbreviated 13 And, is a single,[10] blue-white hued variable star[5] in the northern constellation of Andromeda. 13 Andromedae is the Flamsteed designation, while it bears the variable star designation V388 Andromedae. With a typical apparent visual magnitude of around 5.75,[3] it is dimly visible to the naked eye under good seeing conditions. The distance to this star can be directly estimated from its annual parallax shift of 10.9 mas,[2] yielding a range of 300 light years. At that distance, its brightness is diminished by an extinction of 0.13 magnitude due to interstellar dust.[7] The star is moving closer to the Earth with a heliocentric radial velocity of −8 km/s.[6]

This is a magnetic chemically peculiar star that has been assigned stellar classifications of B9 III or B9 Mn.[4] It is a variable star of the Alpha2 Canum Venaticorum type, ranging in magnitude from 5.73 down to 5.77[5] with a period of 1.47946 days.[4] The star has a high rate of spin, showing a projected rotational velocity of 75 km/s.[8] 13 Andromedae is around 345[7] million years old and shines with 43[3] times the Sun's luminosity.

  1. ^ Cite error: The named reference Adelman was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Adelman2005 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Abt2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).