Astronomy:94 Piscium

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Short description: Star in the constellation Pisces
94 Piscium
Observation data
Equinox J2000.0]] (ICRS)
Constellation Pisces
Right ascension  01h 26m 41.67906s[1]
Declination +19° 14′ 25.5356″[1]
Apparent magnitude (V) 5.495[2]
Characteristics
Evolutionary stage horizontal branch
Spectral type K1 III[3]
B−V color index 1.106±0.005[4]
Astrometry
Radial velocity (Rv)−42.53±0.09[5] km/s
Proper motion (μ) RA: 51.382[1] mas/yr
Dec.: -58.041[1] mas/yr
Parallax (π)10.6874 ± 0.1404[1] mas
Distance305 ± 4 ly
(94 ± 1 pc)
Absolute magnitude (MV)0.84[4]
Details
Mass1.34[6] M☉
Radius12.8+0.1
−0.4[1] R☉
Luminosity68.759±1.058[1] L☉
Surface gravity (log g)2.45±0.10[7] cgs
Temperature4,665±42[7] K
Metallicity [Fe/H]−0.03±0.04[7] dex
Age4.1[6] Gyr
Other designations
BD+18° 189, FK5 1039, HD 8763, HIP 6732, HR 414, SAO 92444[8]
Database references
SIMBADdata

94 Piscium is a single[9] star in the zodiac constellation Pisces,[8] located 305 light years away from the Sun.[1] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.495.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −43 km/s.[5] It is a possible member of the Wolf 630 moving group.[10]

This is an evolved K-type giant star with a stellar classification of K1 III.[3] It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core.[11] The star is 4.1 billion years old with 1.34[6] times the mass of the Sun and 13 times the Sun's radius. It is radiating 69[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,665 K.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 McWilliam, Andrew (1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". The Astrophysical Journal Supplement Series 74: 1075. doi:10.1086/191527. Bibcode: 1990ApJS...74.1075M. 
  4. ↑ 4.0 4.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  5. ↑ 5.0 5.1 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. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F. 
  6. ↑ 6.0 6.1 6.2 Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo et al. (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society 456 (4): 3655. doi:10.1093/mnras/stv2830. Bibcode: 2016MNRAS.456.3655M. 
  7. ↑ 7.0 7.1 7.2 7.3 Bubar, Eric J.; King, Jeremy R. (2010). "Spectroscopic Abundances and Membership in the Wolf 630 Moving Group". The Astronomical Journal 140 (2): 293. doi:10.1088/0004-6256/140/2/293. Bibcode: 2010AJ....140..293B. 
  8. ↑ 8.0 8.1 "94 Psc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=94+Psc. 
  9. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  10. ↑ Bubar, Eric J.; King, Jeremy R. (August 2010), "Spectroscopic Abundances and Membership in the Wolf 630 Moving Group", The Astronomical Journal 140 (2): 293–318, doi:10.1088/0004-6256/140/2/293, Bibcode: 2010AJ....140..293B. 
  11. ↑ Tautvaišienė, G. et al. (December 2010), "C, N and O abundances in red clump stars of the Milky Way", Monthly Notices of the Royal Astronomical Society 409 (3): 1213–1219, doi:10.1111/j.1365-2966.2010.17381.x, Bibcode: 2010MNRAS.409.1213T 



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