HD 7853
HD 7853 is a double star in the constellation Andromeda. With an apparent magnitude of 6.46, the stars can barely be seen with the naked eye even on the best of nights. The system is located approximately 148 parsecs (480 ly) distant, and the brighter star is an Am star, meaning that it has unusual metallic absorption lines. The spectral type estimates of the primary range between A4 and A9.[3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 01h 18m 47.0086s[1] |
Declination | +37° 23′ 10.5648″[1] |
Apparent magnitude (V) | 6.497[2] |
Characteristics | |
Spectral type | A4–A9m[3] |
B−V color index | 0.217[2] |
Astrometry | |
Radial velocity (Rv) | 5.0±2.90[4] km/s |
Proper motion (μ) | RA: −8.659±0.107[1] mas/yr Dec.: −3.016±0.120[1] mas/yr |
Parallax (π) | 6.7595 ± 0.0592[1] mas |
Distance | 483 ± 4 ly (148 ± 1 pc) |
Other designations | |
Database references | |
SIMBAD | data |
Database references | |
SIMBAD | data |
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H.
- Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
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