55 Pegasi
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 07m 00.25965s[1] |
| Declination | 9° 24′ 34.1703″[1] |
| Apparent magnitude (V) | 4.51[2] |
| Characteristics | |
| Spectral type | M1IIIab[3] |
| U−B color index | +1.88[2] |
| B−V color index | +1.58[2] |
| Astrometry | |
| Radial velocity (Rv) | -5.34[4] km/s |
| Proper motion (μ) | RA: +6.41[1] mas/yr Dec.: -12.71[1] mas/yr |
| Parallax (π) | 9.92 ± 0.29 mas[1] |
| Distance | 329 ± 10 ly (101 ± 3 pc) |
| Absolute magnitude (MV) | -0.48[5] |
| Details | |
| Mass | 1.61±0.13[6] M☉ |
| Radius | 45.87+1.31 −1.38[6] R☉ |
| Luminosity | 483.1±37.2[6] L☉ |
| Temperature | 3994±50[6] K |
| Age | 2.13±0.46[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
55 Pegasi (55 Peg) is a class M1III[3] (red giant) star in the constellation Pegasus. Its apparent magnitude is 4.51[2] and it is approximately 329 light years away based on parallax.[1]
It is a suspected variable, with an observed magnitude range from 4.50 to 4.56.[7]
References
- ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ^ 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.
- ^ 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.
- ^ 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/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
- ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
- ^ a b c d e Baines, Ellyn K.; et al. (2018). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer". The Astronomical Journal. 155. 30. arXiv:1712.08109. Bibcode:2018AJ....155...30B. doi:10.3847/1538-3881/aa9d8b.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23–25. 25: 47. Bibcode:2006SASS...25...47W.
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