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78 Aquarii

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78 Aquarii

Snapshot of 78 Aqr from Digitized Sky Survey project
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 54m 34.12178s[1]
Declination −07° 12′ 16.6490″[1]
Apparent magnitude (V) 6.181[2]
Characteristics
Spectral type K2III[3]
Astrometry
Radial velocity (Rv)11.63±0.14[1] km/s
Proper motion (μ) RA: −14.811[1] mas/yr
Dec.: −34.596[1] mas/yr
Parallax (π)5.4411±0.0498 mas[1]
Distance599 ± 5 ly
(184 ± 2 pc)
Details
Radius21.775[4] R☉
Luminosity203[1] L☉
Surface gravity (log g)1.72[5] cgs
Temperature4,400±30[4] K
Metallicity [Fe/H]−0.01[5] dex
Other designations
BD−07°5886, HD 216637, HIP 113127, HR 8710, SAO 146382[6]
Database references
SIMBADdata

78 Aquarii (abbreviated 78 Aqr) is a star in the constellation of Aquarius. 78 Aquarii is its Flamsteed designation. Based on stellar parallax measurements made by Gaia, it is located about 600 light-years (180 parsecs) from the Sun.

78 Aquarii has a spectral type of K2III,[3] indicating a giant star with a reddish color. Its apparent magnitude is 6.18,[2] indicating it is not visible to the sky for all but the best viewing conditions. At its surface, its temperature is estimated to be roughly 4,400 K.[4] It has no known exoplanets.

References

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  1. ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b 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. ^ a b 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 c Stassun, K.G.; et al. (October 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. S2CID 166227927.
  5. ^ a b Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics. 685: A59. arXiv:2212.11639. Bibcode:2024A&A...685A..59M. doi:10.1051/0004-6361/202245762.
  6. ^ "78 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-22.


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