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HD 193556
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Delphinus
Right ascension 20h 20m 20.5234s [1]
Declination +14° 34′ 09.3206″ [1]
Apparent magnitude (V) 6.17±0.01 [2]
Characteristics
Spectral type G8 III [3]
U−B color index +0.67 [4]
B−V color index +0.92 [4]
Astrometry
Radial velocity (Rv)11.7±0.3 [5] km/s
Proper motion (μ) RA: −3.887  mas/ yr [1]
Dec.: +5.610  mas/ yr [1]
Parallax (π)6.9878 ± 0.0252  mas [1]
Distance467 ± 2  ly
(143.1 ± 0.5  pc)
Absolute magnitude (MV)+0.04 [6]
Details
Mass2.65 [7]  M☉
Radius11.33 [8]  R☉
Luminosity102 [9]  L☉
Surface gravity (log g)2.76 [10]  cgs
Temperature5,104 [10]  K
Metallicity [Fe/H]+0.03 [10]  dex
Rotational velocity (v sin i)1.5±1.2 [11] km/s
Age490 [7]  Myr
Other designations
AG+14°2187, BD+14°4263, FK5 3629, GC 28288, HD 193556, HIP 100274, HR 7778, SAO 105988 [12]
Database references
SIMBAD data

HD 193556 (HR 7778) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.17, [2] making it visible to the naked eye under ideal conditions. Parallax measurements place the object at a distance of 467 light years [1] and it is currently receding with a heliocentric radial velocity of 11.7  km/s. [5]

HD 193556 has a stellar classification of G8 III, [3] indicating that it is a red giant. It has 2.65 times the mass of the Sun and is currently 490 million years old, [7] having expanded to 11.33 times the radius of the Sun. [8] It shines with a luminosity of 102  L☉ [9] from its enlarged photosphere at an effective temperature of 5,104  K, [10] giving it a yellow glow. HD 193556 has an iron abundance around solar level [10] and spins leisurely with a poorly constrained projected rotational velocity of 1.5  km/s. [11]

References

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID  227254300. (Erratum:  doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361.
  3. ^ a b Harlan, E. A. (September 1969). "MK classifications for F and G-type stars. I." The Astronomical Journal. 74: 916. Bibcode: 1969AJ.....74..916H. doi: 10.1086/110881. ISSN  0004-6256.
  4. ^ a b Fernie, J. D. (May 1983). "New UBVRI photometry for 900 supergiants". The Astrophysical Journal Supplement Series. 52: 7. Bibcode: 1983ApJS...52....7F. doi: 10.1086/190856. eISSN  1538-4365. ISSN  0067-0049.
  5. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. ISSN  1063-7737. S2CID  119231169.
  6. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. ISSN  1063-7737. S2CID  255204555.
  7. ^ a b c Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv: 0804.4473. Bibcode: 2008ApJS..178...89D. doi: 10.1086/589654. eISSN  1538-4365. ISSN  0067-0049.
  8. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. ISSN  0004-6256.
  9. ^ a b Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv: 1507.01466. Bibcode: 2015AJ....150...88L. doi: 10.1088/0004-6256/150/3/88. eISSN  1538-3881. ISSN  0004-6256. S2CID  118505114.
  10. ^ a b c d e Liu, Y. J.; Tan, K. F.; Wang, L.; Zhao, G.; Sato, Bun'ei; Takeda, Y.; Li, H. N. (31 March 2014). "The Lithium Abundances of a Large Sample of Red Giants". The Astrophysical Journal. 785 (2): 94. arXiv: 1404.1687. Bibcode: 2014ApJ...785...94L. doi: 10.1088/0004-637X/785/2/94. eISSN  1538-4357. ISSN  0004-637X.
  11. ^ a b de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433–460. Bibcode: 1999A&AS..139..433D. doi: 10.1051/aas:1999401. ISSN  0365-0138.
  12. ^ "HD 193556". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 20, 2022.
Retrieved from " https://en.wikipedia.org/?title=HD_193556&oldid=1154751514"
From Wikipedia, the free encyclopedia
HD 193556
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Delphinus
Right ascension 20h 20m 20.5234s [1]
Declination +14° 34′ 09.3206″ [1]
Apparent magnitude (V) 6.17±0.01 [2]
Characteristics
Spectral type G8 III [3]
U−B color index +0.67 [4]
B−V color index +0.92 [4]
Astrometry
Radial velocity (Rv)11.7±0.3 [5] km/s
Proper motion (μ) RA: −3.887  mas/ yr [1]
Dec.: +5.610  mas/ yr [1]
Parallax (π)6.9878 ± 0.0252  mas [1]
Distance467 ± 2  ly
(143.1 ± 0.5  pc)
Absolute magnitude (MV)+0.04 [6]
Details
Mass2.65 [7]  M☉
Radius11.33 [8]  R☉
Luminosity102 [9]  L☉
Surface gravity (log g)2.76 [10]  cgs
Temperature5,104 [10]  K
Metallicity [Fe/H]+0.03 [10]  dex
Rotational velocity (v sin i)1.5±1.2 [11] km/s
Age490 [7]  Myr
Other designations
AG+14°2187, BD+14°4263, FK5 3629, GC 28288, HD 193556, HIP 100274, HR 7778, SAO 105988 [12]
Database references
SIMBAD data

HD 193556 (HR 7778) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.17, [2] making it visible to the naked eye under ideal conditions. Parallax measurements place the object at a distance of 467 light years [1] and it is currently receding with a heliocentric radial velocity of 11.7  km/s. [5]

HD 193556 has a stellar classification of G8 III, [3] indicating that it is a red giant. It has 2.65 times the mass of the Sun and is currently 490 million years old, [7] having expanded to 11.33 times the radius of the Sun. [8] It shines with a luminosity of 102  L☉ [9] from its enlarged photosphere at an effective temperature of 5,104  K, [10] giving it a yellow glow. HD 193556 has an iron abundance around solar level [10] and spins leisurely with a poorly constrained projected rotational velocity of 1.5  km/s. [11]

References

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID  227254300. (Erratum:  doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361.
  3. ^ a b Harlan, E. A. (September 1969). "MK classifications for F and G-type stars. I." The Astronomical Journal. 74: 916. Bibcode: 1969AJ.....74..916H. doi: 10.1086/110881. ISSN  0004-6256.
  4. ^ a b Fernie, J. D. (May 1983). "New UBVRI photometry for 900 supergiants". The Astrophysical Journal Supplement Series. 52: 7. Bibcode: 1983ApJS...52....7F. doi: 10.1086/190856. eISSN  1538-4365. ISSN  0067-0049.
  5. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. ISSN  1063-7737. S2CID  119231169.
  6. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. ISSN  1063-7737. S2CID  255204555.
  7. ^ a b c Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv: 0804.4473. Bibcode: 2008ApJS..178...89D. doi: 10.1086/589654. eISSN  1538-4365. ISSN  0067-0049.
  8. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. ISSN  0004-6256.
  9. ^ a b Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv: 1507.01466. Bibcode: 2015AJ....150...88L. doi: 10.1088/0004-6256/150/3/88. eISSN  1538-3881. ISSN  0004-6256. S2CID  118505114.
  10. ^ a b c d e Liu, Y. J.; Tan, K. F.; Wang, L.; Zhao, G.; Sato, Bun'ei; Takeda, Y.; Li, H. N. (31 March 2014). "The Lithium Abundances of a Large Sample of Red Giants". The Astrophysical Journal. 785 (2): 94. arXiv: 1404.1687. Bibcode: 2014ApJ...785...94L. doi: 10.1088/0004-637X/785/2/94. eISSN  1538-4357. ISSN  0004-637X.
  11. ^ a b de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433–460. Bibcode: 1999A&AS..139..433D. doi: 10.1051/aas:1999401. ISSN  0365-0138.
  12. ^ "HD 193556". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 20, 2022.
Retrieved from " https://en.wikipedia.org/?title=HD_193556&oldid=1154751514"

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