78 Pegasi

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78 Pegasi
Pegasus constellation map.svg
Red circle.svg

Location of 78 Pegasi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 23h 43m 59.48560s[1]
Declination 29° 21′ 41.2342″[1]
Apparent magnitude (V) 4.93[2]
Spectral type K0III[3]
U−B color index +0.63[4]
B−V color index +0.96[4]
Radial velocity (Rv) -8.33[5] km/s
Proper motion (μ) RA: +71.10[1] mas/yr
Dec.: -40.58[1] mas/yr
Parallax (π) 14.54 ± 0.56[1] mas
Distance 224 ± 9 ly
(69 ± 3 pc)
Absolute magnitude (MV) 0.75[2]
Mass 1.50[6] M
Radius 10[6] R
Luminosity 57.35[2] L
Surface gravity (log g) 2.62[6] cgs
Temperature 4,898[6] K
Metallicity [Fe/H] +0.01[2] dex
Rotational velocity (v sin i) 1.1[7] km/s
Other designations
BD+28°4627, CCDM J23440+2922AB, GC 32954, HIP 117073, HR 8997, HD 222842, SAO 91457, WDS J23440+2922AB
Database references

78 Pegasi (78 Peg) is a class K0III[3] (orange giant) star in the constellation Pegasus. Its apparent magnitude is 4.93[2] and it is approximately 224 light years away based on parallax.[1]

It is a binary star, orbiting in a 630-year orbit with eccentricity 0.11 with the 8.10 magnitude companion B.[8]


  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 e 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
  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 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  5. ^ Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. 
  6. ^ a b c d Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002Freely accessible. Bibcode:1999A&A...352..555A.  Vizier catalog entry
  7. ^ 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
  8. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774.  Vizier catalog entry