40 Aquarii

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40 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension  22h 13m 26.3800s[1]
Declination −11° 55′ 34.042″[1]
Apparent magnitude (V) 6.93[2]
Characteristics
Spectral type G5 IV[3]
B−V color index +0.762±0.008
Astrometry
Radial velocity (Rv)−2.9±0.3[4] km/s
Proper motion (μ) RA: +20.95[5] mas/yr
Dec.: −20.05[5] mas/yr
Parallax (π)4.53 ± 0.28[1] mas
Distance720 ± 40 ly
(220 ± 10 pc)
Absolute magnitude (MV)−0.47[6]
Details[7]
Luminosity154.44[6] L
Surface gravity (log g)2.69[7] cgs
Temperature5,355±80[7] K
Metallicity [Fe/H]−0.13[7] dex
Age100[7] Myr
Other designations
40 Aqr, BD−12° 6209, HD 210845, HIP 109720, SAO 164935[8]
Database references
SIMBADdata

40 Aquarii (abbreviated 40 Aqr) is a yellow subgiant in the constellation of Aquarius. 40 Aquarii is its Flamsteed designation. It is approximately 720 light-years (220 parsecs) from Earth, based on its parallax.[1]

References[edit]

  1. ^ a b c d Gaia Collaboration (2016). "Gaia Data Release 1". Astronomy & Astrophysics. 595: A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.
  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.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 4. Bibcode:1988mcts.book.....H.
  4. ^ Gontcharov, G. A. (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.
  5. ^ a b van Leeuwen, F.; et al. (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.
  6. ^ a b 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.
  7. ^ a b c d e Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
  8. ^ "* 40 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 August 2017.