Nu Pegasi

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ν Pegasi
Pegasus constellation map.svg
Red circle.svg

Location of ν Pegasi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 22h 05m 40.75170s[1]
Declination 5° 03′ 30.7201″[1]
Apparent magnitude (V) 4.84[2]
Spectral type K4III[3]
U−B color index +1.80[2]
B−V color index +1.44[2]
Variable type suspected[4]
Radial velocity (Rv) -18.90[5] km/s
Proper motion (μ) RA: +102.09[1] mas/yr
Dec.: +102.39[1] mas/yr
Parallax (π) 12.01 ± 0.40[1] mas
Distance 272 ± 9 ly
(83 ± 3 pc)
Absolute magnitude (MV) 0.26[6]
Mass 1.13[7] M
Radius 24.57[7] R
Luminosity 149[7] L
Surface gravity (log g) 1.72[7] cgs
Temperature 4,073[7] K
Metallicity [Fe/H] +0.02[7] dex
Rotational velocity (v sin i) 2.3[8] km/s
Other designations
BD+04°4800, 22 Pegasi, GC 30894, HIP 109068, HR 8413, HD 209747, NSV 14020, SAO 127285
Database references

Nu Pegasi (ν Peg) is a class K4III[3] (orange giant) star in the constellation Pegasus. Its apparent magnitude is 4.84[2] and it is approximately 272 light years away based on parallax.[1]

It is a suspected variable, with a magnitude range observed from 4.83 to 4.86.[4]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. 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. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....1.2025S. 
  5. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy & Astrophysics. 430: 165. arXiv:astro-ph/0409579Freely accessible. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  6. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  7. ^ a b c d e f Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv:1412.4634Freely accessible. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360.  Vizier catalog entry
  8. ^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401.  Vizier catalog entry