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 | ±0.008 +0.762 |
Astrometry | |
Radial velocity (Rv) | ±0.3 −2.9[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 |
Distance | 720 ± 40 ly (220 ± 10 pc) |
Absolute magnitude (MV) | −0.47[6] |
Details[7] | |
Luminosity | 154.44[6] L☉ |
Surface gravity (log g) | 2.69[7] cgs |
Temperature | ±80 5,355[7] K |
Metallicity [Fe/H] | −0.13[7] dex |
Age | 100[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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
- 1 2 3 4 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.
- ↑ 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.
- ↑ 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.
- ↑ 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.
- 1 2 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.
- 1 2 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.
- 1 2 3 4 5 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.
- ↑ "* 40 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 August 2017.
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