7 Piscium

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7 Piscium
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 23h 20m 20.58314s[1]
Declination 5° 22′ 52.7012″[1]
Apparent magnitude (V) 5.069[2]
Characteristics
Spectral type K1 IV[3]
U−B color index +1.12[4]
B−V color index +1.20[4]
Astrometry
Proper motion (μ) RA: 78.47[1] mas/yr
Dec.: −60.00[1] mas/yr
Parallax (π) 7.54 ± 0.40[1] mas
Distance 430 ± 20 ly
(133 ± 7 pc)
Details[5]
Surface gravity (log g) 1.81 ± 0.28 cgs
Temperature 4314 ± 80 K
Metallicity [Fe/H] −0.71 ± 0.12 dex
Other designations
BD+04 4997, FK5 3871, HD 220009, HIP 115227, HR 8878, SAO 128126
Database references
SIMBAD data

7 Piscium , also known as 7 Psc or HR 8878, is a metal-deficient giant star in the constellation Pisces.[6] It has an effective temperature of 4314 Kelvin.[5]

References[edit]

  1. ^ a b c d e van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357. 
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. 
  3. ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H. 
  4. ^ a b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J. 
  5. ^ a b Prugniel, Ph.; et al. (July 2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, Bibcode:2011A&A...531A.165P, arXiv:1104.4952Freely accessible, doi:10.1051/0004-6361/201116769. 
  6. ^ Smiljanic, R.; Porto de Mello, G. F.; da Silva, L. (June 2007), "Abundance analysis of barium and mild barium stars", Astronomy & Astrophysics, 468 (2): 679–693, Bibcode:2007A&A...468..679S, arXiv:astro-ph/0702421Freely accessible, doi:10.1051/0004-6361:20065867 .