Kappa Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 40m 24.508s |
| Declination | +44° 20′ 02.16″ |
| Apparent magnitude (V) | 4.139 |
| Characteristics | |
| Spectral type | B9 IVn |
| U−B color index | −0.221 |
| B−V color index | −0.067 |
| Astrometry | |
| Radial velocity (Rv) | −12.7±0.8 km/s |
| Proper motion (μ) | RA: +79.998 mas/yr Dec.: −19.011 mas/yr |
| Parallax (π) | 19.4064±0.2104 mas |
| Distance | 168 ± 2 ly (51.5 ± 0.6 pc) |
| Absolute magnitude (MV) | +0.59 |
| Details | |
| Mass | 2.768+0.1 −0.109 M☉ |
| Radius | 2.303+0.039 −0.016 (equatorial) 1.959+0.033 −0.028 (polar) R☉ |
| Luminosity | 62.60±9.83 L☉ |
| Surface gravity (log g) | 3.968+0.028 −0.025 (equatorial) 4.296+0.019 −0.012 (polar) cgs |
| Temperature | 10,342+384 −138 (equatorial) 12,050+448 −39 (polar) K |
| Rotational velocity (v sin i) | 142.2+13.1 −21.1 km/s |
| Age | 47+27 −40 Myr |
| Other designations | |
| Kaffalmusalsala, κ And, 19 Andromedae, BD+43°4522, FK5 1619, HD 222439, HIP 116805, HR 8976, SAO 53264, PPM 64525 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Kappa Andromedae, Latinized from κ Andromedae, also named Kaffalmusalsala, is a star in the northern constellation of Andromeda. It is visible to the naked eye with an apparent visual magnitude of 4.1. Based on the star's ranking on the Bortle Dark-Sky Scale, it is luminous enough to be visible from the suburbs and from urban outskirts, but not from brightly lit inner city regions. Parallax measurements place it at a distance of approximately 168 light-years (52 parsecs). It is drifting closer with a radial velocity of −13 km/s, and there is a high likelihood (86%) that it is a member of the Beta Pictoris moving group. The star has one known exoplanet, Kappa Andromedae b.