28 Aquarii

28 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 01m 05.01458s[1]
Declination +00° 36′ 16.9803″[1]
Apparent magnitude (V) 5.597[2]
Characteristics
Spectral type K2III[3]
U−B color index +1.40[4]
B−V color index +1.28[4]
Astrometry
Radial velocity (Rv)8.12 ± 0.1[5] km/s
Proper motion (μ) RA: 6.22[1] mas/yr
Dec.: -11.05[1] mas/yr
Parallax (π)4.56 ± 0.45[1] mas
Distance720 ± 70 ly
(220 ± 20 pc)
Details[6]
Mass1.47 M☉
Surface gravity (log g)2.3 cgs
Temperature4361 K
Age2.9 Gyr
Other designations
BD−00° 4296, HD 209128, HIP 108691, HR 8390, SAO 127235
Database references
SIMBADdata

28 Aquarii (abbreviated 28 Aqr) is an orange giant star in the constellation of Aquarius. 28 Aquarii is the Flamsteed designation. It is 2.9 billion years old.[6]

References

  1. 1 2 3 4 5 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357.
  2. ↑ 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.
  3. ↑ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5: 0. Bibcode:1999MSS...C05....0H.
  4. 1 2 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
  5. ↑ Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S. (2002). "Radial Velocities for 889 Late‐Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503. Bibcode:2002ApJS..141..503N. arXiv:astro-ph/0112477 Freely accessible. doi:10.1086/340570.
  6. 1 2 Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo; Aguirre, Victor Silva; Zamora, Olga (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society. 456 (4): 3655. Bibcode:2016MNRAS.456.3655M. arXiv:1511.08203 Freely accessible. doi:10.1093/mnras/stv2830.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.