8 Aquarii

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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]
Distance 298 ± 4  ly
(91 ± 1  pc)
Absolute magnitude  (MV)1.91 [4]
Details
Mass 1.9 [5]   M☉
Radius 2.27 [5]   R☉
Luminosity 19 [5]   L☉
Surface gravity (log g)4.06 [6]   cgs
Temperature 8,008 [5]   K
Metallicity [Fe/H]0.11 [6]   dex
Other designations
BD −13°5813, HD 199828, HIP 103640, SAO 164046 [7]
Database references
SIMBAD data

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. 1 2 3 4 5 6 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. 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. S2CID   119257644.
  5. 1 2 3 4 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. 1 2 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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