32 Pegasi

32 Pegasi
Location of 32 Pegasi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 22h 21m 19.33896s[1]
Declination 28° 19′ 49.8786″[1]
Apparent magnitude (V) 4.81[2] (4.83 + 8.86)[3]
Characteristics
Spectral type B9III[4]
U−B color index −0.19[2]
B−V color index +0.00[2]
Astrometry
Radial velocity (Rv)+11.40[5] km/s
Proper motion (μ) RA: +17.426[1] mas/yr
Dec.: +7.122[1] mas/yr
Parallax (π)5.7814 ± 0.3196 mas[1]
Distance560 ± 30 ly
(173 ± 10 pc)
Absolute magnitude (MV)−1.82[6]
Details
32 Peg Aa
Luminosity541[6] L☉
Temperature11,403[7] K
Rotational velocity (v sin i)60[8] km/s
Other designations
32 Peg, BD+27°4299, GC 31253, HD 212097, HIP 110371, HR 8522, SAO 90440, CCDM J22213+2820AF, WDS J22213+2820Aa,Ab[9]
Database references
SIMBADdata

32 Pegasi is a binary star[10] system in the northern constellation of Pegasus. It is visible to the naked eye as a faint, blue-white hued point of light with an apparent visual magnitude of 4.81[2] The system is located approximately 560 light years away from the Sun based on parallax, and is drifting further away with a radial velocity of +11.4 km/s.[5]

The brighter member of this system, designated component Aa, has visual magnitude 4.83 with a stellar classification of B9III,[4] matching a late B-type star with the luminosity class of a giant. It is spinning with a projected rotational velocity of 60 km/s,[8] and is radiating 541[6] times the luminosity of the Sun from its photosphere at an effective temperature of 11,403 K.[7]

The fainter secondary, component Ab, is of magnitude 8.86 with an angular separation of 0.50″ along a position angle of 288° from the primary, as of 2005. Visual companions include component B, at a 70.7″ separation from the primary and magnitude 10.73; C, at a separation from B of 3.2″ and magnitude 12.4; as well as D (separation from A of 42.8″ and magnitude 11.9) and E (separation from A of 58.3" and magnitude 11.9).[3]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference WDS was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference XHIP was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Paunzen2005 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).