Misplaced Pages

49 Persei

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Star in the constellation Perseus
49 Persei
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 04 08 15.38813
Declination +37° 43′ 38.9875″
Apparent magnitude (V) 6.07
Characteristics
Spectral type K1 III
B−V color index 0.943±0.003
Astrometry
Radial velocity (Rv)−44.35±0.20 km/s
Proper motion (μ) RA: −98.909 mas/yr
Dec.: −195.772 mas/yr
Parallax (π)22.0897 ± 0.0483 mas
Distance147.7 ± 0.3 ly
(45.27 ± 0.10 pc)
Absolute magnitude (MV)2.85
Details
Mass1.38 M
Radius3.72+0.10
−0.09 R
Luminosity7.95±0.03 L
Surface gravity (log g)3.45 cgs
Temperature5,028+61
−70 K
Metallicity 0.02±0.04 dex
Age3.93 Gyr
Other designations
40 Per, BD+37°881, HD 25975, HIP 19302, HR 1277, SAO 57000
Database references
SIMBADdata

49 Persei is a star in the northern constellation of Perseus. It is just visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 6.09. Based upon parallax measurements, this star is located around 147.7 light-years (45.27 parsecs) away from the Sun, but is drifting closer with a radial velocity of −44 km/s. It has a relatively large proper motion, traversing the celestial sphere at a rate of 0.220·yr.

This is an aging red giant star with a stellar classification of K1III, a star that has used up its core hydrogen and is expanding. It is a candidate horizontal branch star, which would indicate it is past the red giant branch stage and is fusing helium at its core. The star is nearly four billion years old with 1.4 times the mass of the Sun and 3.7 times the Sun's radius. It is radiating eight times the luminosity of the Sun from its photosphere at an effective temperature of 5,028 K.

References

  1. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ 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, S2CID 119257644.
  3. Roman, Nancy G. (December 1955), "A Catalogue of High-Velocity Stars", The Astrophysical Journal Supplement Series, 2: 195, Bibcode:1955ApJS....2..195R, doi:10.1086/190021, ISSN 0067-0049.
  4. ^ Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal, 153 (1): 19, arXiv:1611.02897, Bibcode:2017AJ....153...21L, doi:10.3847/1538-3881/153/1/21, S2CID 119511744, 21.
  5. "49 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-18.
  6. Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.
  7. Afșar, Melike; et al. (June 2018), "A Spectroscopic Survey of Field Red Horizontal-branch Stars", The Astronomical Journal, 155 (6): 25, arXiv:1804.04477, Bibcode:2018AJ....155..240A, doi:10.3847/1538-3881/aabe86, S2CID 119336618, 240.
Constellation of Perseus
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Star
clusters
NGC
Other
Nebulae
NGC
Other
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
Category
Categories: