1 Persei

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1 Persei
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Perseus
Right ascension 01h 51m 59.320s[1]
Declination +55° 08′ 50.58″[1]
Characteristics
Spectral type B1.5V [2]
Variable type eclipsing binary[3]
Astrometry
Proper motion (μ) RA: 12.05 ± 0.25[1] mas/yr
Dec.: −9.18 ± 0.28[1] mas/yr
Parallax (π) 2.52 ± 0.33[1] mas
Distance approx. 1,300 ly
(approx. 400 pc)
Other designations
HR 533, HD 11241, BD+54°396, HIP 8704, SAO 22690[2]

1 Persei (1 Per) is a eclipsing binary[3] star in the constellation Perseus. Its apparent magnitude is 5.51.

Properties[edit]

1 Persei is an eclipsing binary star consisting of two B2 stars in a 25.9 day orbit.[4]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b SIMBAD, 1 Persei (accessed 13 January 2013)
  3. ^ a b North, P. et al. (1981). "1 Per: a new eclipsing binary with a long period and an elliptical orbit". Information Bulletin on Variable Stars 2036. Bibcode:1981IBVS.2036....1N. 
  4. ^ Harmanec, P. et al. (1997). "Search for forced oscillations in binaries. I. The eclipsing and spectroscopic binary V436 Persei = 1 Persei.". Astronomy and Astrophysics 319 (2): 867–880. Bibcode:1997A&A...319..867H.