10 Delphini

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10 Delphini
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Delphinus
Right ascension 20h 41m 16.2079s [1]
Declination +14° 34′ 58.3606″ [1]
Apparent magnitude  (V)6.00±0.01 [2]
Characteristics
Evolutionary stage red giant branch [1]
Spectral type K4 III [3]
U−B color index +1.44 [4]
B−V color index +1.24 [5]
Astrometry
Radial velocity (Rv)−32±2 [6] km/s
Proper motion (μ)RA: −9.462 mas/yr [1]
Dec.: −0.344 mas/yr [1]
Parallax (π)6.6178±0.0397  mas [1]
Distance 493 ± 3  ly
(151.1 ± 0.9  pc)
Absolute magnitude  (MV)+0.06 [7]
Details
Mass 2.42±0.71 [8]   M☉
Radius 18.47+1.02
−1.03 [9]   R☉
Luminosity 125±2 [9]   L☉
Surface gravity (log g)2.27 [10]   cgs
Temperature 4,378 [10]   K
Metallicity [Fe/H]0.00 [10]   dex
Age 794±33 [8]   Myr
Other designations
10 Del, AG+14°2269, BD+14°4393, GC 28826, HD 197121, HIP 102080, HR 7918, SAO 106384
Database references
SIMBAD data

10 Delphini (10 Del) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.00, allowing it to be faintly seen with the naked eye. Parallax measurements put the object at a distance of 493 light years but is drifting closer with a heliocentric radial velocity of −32  km/s .

10 Delphini has a stellar classification of K4 III [3] or K2 III, [11] both indicating that it is a red giant. However, there is some uncertainty behind the first classification. It has twice the mass of the Sun [8] but at an age of 794 million years [8] — expanded to 18 times the radius of the Sun. [9] It shines at 125  L☉ [9] from its enlarged photosphere at an effective temperature of 4,378 K, [10] giving it an orange glow. 10 Del has a solar metallicity. [10]

10 Del has been suspected to be a variable star, although it hasn't been catalogued as such in the GCVS. [12]

References

  1. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. ↑ 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. 1 2 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi: 10.1086/143628 . ISSN   0004-637X.
  4. ↑ Paunzen, E. (May 2022). "Catalogue of stars measured in the Geneva seven-colour photometric system". Astronomy & Astrophysics. 661: A89. arXiv: 2111.04810 . Bibcode:2022A&A...661A..89P. doi: 10.1051/0004-6361/202142355 . eISSN   1432-0746. ISSN   0004-6361.
  5. ↑ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
  6. ↑ 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. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID   17804304.
  7. ↑ 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.
  8. 1 2 3 4 Feuillet, Diane K.; Bovy, Jo; Holtzman, Jon; Girardi, Léo; MacDonald, Nick; Majewski, Steven R.; Nidever, David L. (20 January 2016). "Determining Ages of Apogee Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv: 1511.04088 . Bibcode:2016ApJ...817...40F. doi: 10.3847/0004-637X/817/1/40 . eISSN   1538-4357.
  9. 1 2 3 4 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.
  10. 1 2 3 4 5 Forsberg, R.; Jönsson, H.; Ryde, N.; Matteucci, F. (November 2019). "Abundances of disk and bulge giants from high-resolution optical spectra". Astronomy & Astrophysics. 631: A113. arXiv: 1909.10535 . Bibcode:2019A&A...631A.113F. doi: 10.1051/0004-6361/201936343 . eISSN   1432-0746. ISSN   0004-6361.
  11. ↑ Bartkevicius, A.; Lazauskaite, R. (1 January 1997). "Classification of Population II Stars in the Vilnius Photometric System. II. Results". Open Astronomy. 6 (4): 499. Bibcode:1997BaltA...6..499B. doi: 10.1515/astro-1997-0402 . eISSN   2543-6376.
  12. ↑ Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. ISSN   1063-7729. S2CID   255195566.
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