78 Aquarii

Last updated
78 Aquarii
78 Aquarii.png
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]
Distance 599 ± 5  ly
(184 ± 2  pc)
Details
Radius 21.775 [4]   R
Luminosity 203 [1]   L
Surface gravity (log g)1.72 [5]   cgs
Temperature 4,400±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
SIMBAD data

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

  1. 1 2 3 4 5 6 7 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. 1 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. 1 2 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 3 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. 1 2 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.