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Nu Pegasi
Location of ν Pegasi (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Pegasus
Right ascension 22h 05m 40.75170s [1]
Declination 5° 03′ 30.7201″ [1]
Apparent magnitude (V) 4.84 [2]
Characteristics
Evolutionary stage red giant branch [3]
Spectral type K4III [4]
U−B color index +1.80 [2]
B−V color index +1.44 [2]
Variable type suspected [5]
Astrometry
Radial velocity (Rv)−18.90 [6] km/s
Proper motion (μ) RA: +101.759 [7]  mas/ yr
Dec.: +100.923 [7]  mas/ yr
Parallax (π)12.4810 ± 0.3322  mas [7]
Distance261 ± 7  ly
(80 ± 2  pc)
Absolute magnitude (MV)0.26 [8]
Details [9]
Mass1.13  M☉
Radius24.57  R☉
Luminosity149  L☉
Surface gravity (log g)1.72  cgs
Temperature4,073  K
Metallicity [Fe/H]+0.02  dex
Rotational velocity (v sin i)2.3 [10] km/s
Age8.1+2.3
−0.4 [3]  Gyr
Other designations
ν Peg, 22 Pegasi, NSV 14020, BD+04°4800, GC 30894, HD 209747, HIP 109068, HR 8413, SAO 127285 [11]
Database references
SIMBAD data

ν Pegasi, Latinized as Nu Pegasi is a single [12] star in the northern constellation of Pegasus. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.84. [2] The star is located approximately 261  light years away based on parallax, [7] but is drifting closer with a radial velocity of −19  km/s. [6]

This is an aging giant star, most likely (94% chance) on the red giant branch, [3] with a stellar classification of K4III. [4] It is a suspected variable, with a magnitude range observed from 4.83 to 4.86. [5] With the supply of hydrogen at its core exhausted, the star has cooled and expanded to 24.6 times the Sun's radius. It is 13% more massive than the Sun and is radiating 149 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,073  K. [9]

References

  1. ^ a b 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. S2CID  18759600. Vizier catalog entry
  2. ^ a b c d 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 c Stock, Stephan; et al. (August 2018). "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search". Astronomy & Astrophysics. 616: 15. arXiv: 1805.04094. Bibcode: 2018A&A...616A..33S. doi: 10.1051/0004-6361/201833111. S2CID  119361866. A33.
  4. ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode: 1999MSS...C05....0H.
  5. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
  6. ^ a b Famaey, B.; et al. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy & Astrophysics. 430: 165–186. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  7. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  8. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644. Vizier catalog entry
  9. ^ a b Reffert, Sabine; et al. (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv: 1412.4634. Bibcode: 2015A&A...574A.116R. doi: 10.1051/0004-6361/201322360. hdl: 10722/215277. S2CID  59334290. Vizier catalog entry
  10. ^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv: astro-ph/0608248. Bibcode: 1999A&AS..139..433D. doi: 10.1051/aas:1999401. Vizier catalog entry
  11. ^ "nu. Peg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-01.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
Retrieved from " https://en.wikipedia.org/?title=Nu_Pegasi&oldid=1180932898"
From Wikipedia, the free encyclopedia
Nu Pegasi
Location of ν Pegasi (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Pegasus
Right ascension 22h 05m 40.75170s [1]
Declination 5° 03′ 30.7201″ [1]
Apparent magnitude (V) 4.84 [2]
Characteristics
Evolutionary stage red giant branch [3]
Spectral type K4III [4]
U−B color index +1.80 [2]
B−V color index +1.44 [2]
Variable type suspected [5]
Astrometry
Radial velocity (Rv)−18.90 [6] km/s
Proper motion (μ) RA: +101.759 [7]  mas/ yr
Dec.: +100.923 [7]  mas/ yr
Parallax (π)12.4810 ± 0.3322  mas [7]
Distance261 ± 7  ly
(80 ± 2  pc)
Absolute magnitude (MV)0.26 [8]
Details [9]
Mass1.13  M☉
Radius24.57  R☉
Luminosity149  L☉
Surface gravity (log g)1.72  cgs
Temperature4,073  K
Metallicity [Fe/H]+0.02  dex
Rotational velocity (v sin i)2.3 [10] km/s
Age8.1+2.3
−0.4 [3]  Gyr
Other designations
ν Peg, 22 Pegasi, NSV 14020, BD+04°4800, GC 30894, HD 209747, HIP 109068, HR 8413, SAO 127285 [11]
Database references
SIMBAD data

ν Pegasi, Latinized as Nu Pegasi is a single [12] star in the northern constellation of Pegasus. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.84. [2] The star is located approximately 261  light years away based on parallax, [7] but is drifting closer with a radial velocity of −19  km/s. [6]

This is an aging giant star, most likely (94% chance) on the red giant branch, [3] with a stellar classification of K4III. [4] It is a suspected variable, with a magnitude range observed from 4.83 to 4.86. [5] With the supply of hydrogen at its core exhausted, the star has cooled and expanded to 24.6 times the Sun's radius. It is 13% more massive than the Sun and is radiating 149 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,073  K. [9]

References

  1. ^ a b 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. S2CID  18759600. Vizier catalog entry
  2. ^ a b c d 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 c Stock, Stephan; et al. (August 2018). "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search". Astronomy & Astrophysics. 616: 15. arXiv: 1805.04094. Bibcode: 2018A&A...616A..33S. doi: 10.1051/0004-6361/201833111. S2CID  119361866. A33.
  4. ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode: 1999MSS...C05....0H.
  5. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode: 2009yCat....102025S.
  6. ^ a b Famaey, B.; et al. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy & Astrophysics. 430: 165–186. arXiv: astro-ph/0409579. Bibcode: 2005A&A...430..165F. doi: 10.1051/0004-6361:20041272. S2CID  17804304.
  7. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  8. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644. Vizier catalog entry
  9. ^ a b Reffert, Sabine; et al. (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv: 1412.4634. Bibcode: 2015A&A...574A.116R. doi: 10.1051/0004-6361/201322360. hdl: 10722/215277. S2CID  59334290. Vizier catalog entry
  10. ^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv: astro-ph/0608248. Bibcode: 1999A&AS..139..433D. doi: 10.1051/aas:1999401. Vizier catalog entry
  11. ^ "nu. Peg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-01.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
Retrieved from " https://en.wikipedia.org/?title=Nu_Pegasi&oldid=1180932898"

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