KK Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 01h 34m 16.607s[1] |
| Declination | +37° 14′ 13.72″[1] |
| Apparent magnitude (V) | 5.91 |
| Characteristics | |
| Spectral type | B9 IV |
| U−B color index | -0.3 |
| B−V color index | -0.07 |
| Variable type | Alpha CVn |
| Astrometry | |
| Radial velocity (Rv) | -4 km/s |
| Proper motion (μ) | RA: 13.58 ± 0.35[1] mas/yr Dec.: -21.90 ± 0.22[1] mas/yr |
| Parallax (π) | 6.97 ± 0.32[1] mas |
| Distance | 470 ± 20 ly (143 ± 7 pc) |
| Absolute magnitude (MV) | +0.35[2] |
| Details | |
| Mass | 2.85 ± 0.15[2] M☉ |
| Radius | 2.7 ± 0.4[2] R☉ |
| Luminosity | 91[2] L☉ |
| Surface gravity (log g) | 4.19 ± 0.13[2] cgs |
| Temperature | 10,940[2] K |
| Rotation | 0.67 days[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
KK Andromedae, also known as HD 9531, is a star in the constellation Andromeda. An Alpha² Canum Venaticorum variable, it varies by 0.012 of a magnitude every 0.66 days.[3]
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 - 1 2 3 4 5 6 7 North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286, Bibcode:1998A&A...334..181N
- ↑ Watson, Christopher (4 January 2010). "KK Andromedae". AAVSO Website. American Association of Variable Star Observers. Retrieved 1 November 2014.
Coordinates: 
01h 34m 16.6065s, +37° 14′ 13.727″
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