Astronomy:78 Aquarii

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Short description: Star in the constellation Aquarius
78 Aquarii
78 Aquarii.png
Snapshot of 78 Aqr from Digitized Sky Survey project
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquarius
Right ascension  22h 54m 34.12147s[1]
Declination −07° 12′ 16.6508″[1]
Apparent magnitude (V) 6.181[2]
Characteristics
Spectral type K2III[3]
Astrometry
Radial velocity (Rv)11.95 ± 0.22[1] km/s
Proper motion (μ) RA: −14.505[1] mas/yr
Dec.: −34.478[1] mas/yr
Parallax (π)5.4637 ± 0.0851[1] mas
Distance597 ± 9 ly
(183 ± 3 pc)
Details
Radius21.775[4] R☉
Temperature4400 ± 30[4] K
Other designations
BD−07° 5886, HD 216637, HIP 113127, HR 8710, SAO 146382[5]
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.[1]

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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 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. ↑ 4.0 4.1 4.2 Stassun, K.G. (October 2019). "The revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  5. ↑ "78 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=78+Aqr. 




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