HR 178
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 41m 36.043s[1] |
| Declination | +24° 37′ 44.43″[1] |
| Apparent magnitude (V) | 6.061 |
| Characteristics | |
| Spectral type | A7m |
| B−V color index | 0.27 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | -14.6 km/s |
| Proper motion (μ) | RA: 104.84 ± 0.36[1] mas/yr Dec.: -22.78 ± 0.24[1] mas/yr |
| Parallax (π) | 7.89 ± 0.40[1] mas |
| Distance | 410 ± 20 ly (127 ± 6 pc) |
| Absolute magnitude (MV) | 6.326 |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 178 is a star in the constellation Andromeda. Located approximately 127 parsecs (410 ly) distant,[2] the star is an evolved Am star[3] with a combined apparent magnitude of 6.06, meaning that it can only be seen with the naked eye on dark, clear nights. The star is suspected of variability, possibly varying between magnitudes 6.04 and 6.06.[4]
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry - ↑ "HR 178". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 15 June 2014.
- ↑ Burkhart, C.; Coupry, M. F.; Faraggiana, R.; Gerbaldi, M. (2005). "The field Am and ? Puppis-like stars: Lithium and heavier elements". Astronomy and Astrophysics. 429 (3): 1043. Bibcode:2005A&A...429.1043B. doi:10.1051/0004-6361:20040467.
- ↑ VSX (18 January 2010). "NSV 258". AAVSO Website. American Association of Variable Star Observers. Retrieved 15 June 2013.
This article is issued from Wikipedia - version of the 8/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.