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. Bibcode2018A&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. Bibcode2000A&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. Bibcode1999MSS...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. Bibcode2019AJ....158..138S. 
  5. "78 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=78+Aqr.