Eta Persei

From Wikipedia, the free encyclopedia
Jump to: navigation, search
η Persei
Perseus constellation map.svg
Red circle.svg

Location of η Per (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 50m 41.80959s[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: +16.23[1] mas/yr
Dec.: −13.54[1] mas/yr
Parallax (π) 3.71 ± 0.27[1] mas
Distance 880 ± 60 ly
(270 ± 20 pc)
Absolute magnitude (MV) −4.29[5]
Details
Radius 44[6] R
Luminosity 5,135[7] L
Temperature 4,047[7] K
Rotational velocity (v sin i) 5.8[3] km/s
Other designations
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
SIMBAD data

Eta Persei (Eta Per, η Persei, η Per), also known as Miram, is a star in the constellation Perseus. It belongs to spectral class K3 and has an apparent magnitude of +3.76. It is approximately 1331 light years away from Earth. This star radiates 35,000 times the luminosity of the Sun.[8]

Name and etymology[edit]

References[edit]

  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752free to read. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c 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 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. 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/0409579free to read. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  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:0907.3346free to read. Bibcode:2009PASP..121..842R. doi:10.1086/605456. 
  6. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367 (2): 521. arXiv:astro-ph/0012289free to read. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. 
  7. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. arXiv:1208.2037free to read. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. 
  8. ^ Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics, 352: 495–507, Bibcode:1999A&A...352..495M 
  9. ^ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York: Dover Publications Inc. p. 331. ISBN 0-486-21079-0. Retrieved 2012-09-04. 
  10. ^ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日