8 Aquarii

8 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 20h 59m 54.826s[1]
Declination −13° 03′ 05.87″[1]
Apparent magnitude (V) 6.60[2]
Characteristics
Spectral type A3/4 IV[3]
B−V color index 0.177±0.007[4]
Astrometry
Proper motion (μ) RA: −31.787 mas/yr[1]
Dec.: −6.566 mas/yr[1]
Parallax (π)10.9478 ± 0.1472 mas[1]
Distance298 ± 4 ly
(91 ± 1 pc)
Absolute magnitude (MV)1.91[4]
Details
Mass1.9[5] M☉
Radius2.27[5] R☉
Luminosity19[5] L☉
Surface gravity (log g)4.06[6] cgs
Temperature8,008[5] K
Metallicity [Fe/H]0.11[6] dex
Other designations
BD−13°5813, HD 199828, HIP 103640, SAO 164046[7]
Database references
SIMBADdata

8 Aquarii (abbreviated 8 Aqr) is a blue-white sub-giant of the spectral class A4IV in the constellation Aquarius. 8 Aquarii is the Flamsteed designation. It is approximately 298 light-years away from Earth, based on parallax.[1] It is approximately 1.7 solar masses and about 3 times hotter than the Sun and thus allows lines of ionized metals with an abundance of metals.[citation needed]

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. ^ 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. Bibcode:1999MSS...C05....0H.
  4. ^ 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. S2CID 119257644.
  5. ^ a b c d 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.
  6. ^ a b Anders, F.; et al. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1354....0A.
  7. ^ "* 8 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg.


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