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 mas[1] |
| 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 | |
| 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 kelvins.[5]
References
- ^ a b c d e van Leeuwen, F.; et al. (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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ a b Prugniel, Ph.; et al. (July 2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769.
- ^ 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, arXiv:astro-ph/0702421, Bibcode:2007A&A...468..679S, doi:10.1051/0004-6361:20065867.
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