32 Pegasi

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32 Pegasi
Pegasus constellation map.svg
Red circle.svg

Location of 32 Pegasi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 22h 21m 19.33935s[1]
Declination 28° 19′ 49.9027″[1]
Apparent magnitude (V) 4.81[2]
Spectral type B9III[3]
U−B color index -0.19[2]
B−V color index +0.00[2]
Radial velocity (Rv) +11.40[4] km/s
Proper motion (μ) RA: +17.78[1] mas/yr
Dec.: +5.18[1] mas/yr
Parallax (π) 4.69 ± 0.62[1] mas
Distance approx. 700 ly
(approx. 210 pc)
Absolute magnitude (MV) -1.82[5]
Luminosity 541[5] L
Temperature 11,403[6] K
Rotational velocity (v sin i) 60[7] km/s
Other designations
BD+27°4299, CCDM J22213+2820AF, GC 31253, HIP 110371, HR 8522, HD 212097, SAO 90440, WDS J22213+2820Aa,Ab
Database references

32 Pegasi (32 Peg) is a class B9III[3] (blue giant) star in the constellation Pegasus. Its apparent magnitude is 4.81[2] and it is approximately 700 light years away based on parallax.[1]

It is a multiple star; the closest companion is Ab, at separation 0.42" and magnitude 8.86. Other companions include B, at 70.7" separation from the primary and magnitude 10.73, and C, at 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).[8][9]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ Paunzen, E.; Schnell, A.; Maitzen, H. M. (2005). "An empirical temperature calibration for the Δa photometric system". Astronomy and Astrophysics. 444 (3): 941. Bibcode:2005A&A...444..941P. arXiv:astro-ph/0509049Freely accessible. doi:10.1051/0004-6361:20053546. 
  7. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590. 
  8. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.  Vizier catalog entry
  9. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. Bibcode:2008MNRAS.389..869E. arXiv:0806.2878Freely accessible. doi:10.1111/j.1365-2966.2008.13596.x.  Vizier catalog entry