Eta Persei

Eta Persei (η Persei) is a binary star in the constellation Perseus. The stars that make the binary system are called Eta Persei A and Eta Persei B. Eta Persei A is also called Miram.[7]

η Persei
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Location of η Per (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 50m 41.766s[1]
Declination +55° 53′ 43.7876″[1]
Apparent magnitude (V) 3.79[2]
Characteristics
Spectral type K3 Ib[3]
U−B color index +1.90[2]
B−V color index +1.69[2]
Astrometry
Radial velocity (Rv)−1.07 ± 0.27[4] km/s
Proper motion (μ) RA: +16.574[1] mas/yr
Dec.: −12.709[1] mas/yr
Parallax (π)4.2061 ± 0.3744[1] mas
Distance780 ± 70 ly
(240 ± 20 pc)
Absolute magnitude (MV)−4.29[5]
Details
Radius134[6] R
Luminosity4,130[6] L
Temperature3,986±170[6] K
Rotational velocity (v sin i)5.8[3] km/s
Other designations
Miram, η Persei, η Per, Eta Per, 15 Persei, BD+55 714, CCDM J02506+5553A, FK5 99, GC 3390, HD 17506, HIP 13268, HR 834, IDS 02434+5529 A, PPM 28039, SAO 23655, WDS J02507+5554A
Database references
SIMBADdata

Eta Persei Media

References

  1. 1.0 1.1 1.2 1.3 1.4 Template:Cite DR2
  2. 2.0 2.1 2.2 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. 3.0 3.1 De Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. arXiv:1312.3474. Bibcode:2002A&A...395...97D. doi:10.1051/0004-6361:20021214.
  4. 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. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
  5. Ryon, Jenna; Shetrone, Matthew D.; Smith, Graeme H. (2009). "Comparing the Ca ii H and K Emission Lines in Red Giant Stars". Publications of the Astronomical Society of the Pacific. 121 (882): 842. arXiv:0907.3346. Bibcode:2009PASP..121..842R. doi:10.1086/605456. S2CID 17821279.
  6. 6.0 6.1 6.2 Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.
  7. "Naming Stars". IAU.org. Retrieved 16 December 2017.