Kappa2 Apodis
Kappa2 Apodis (κ2 Apodis) is the Bayer designation for a double star in the southern circumpolar constellation of Apus. It is located at a distance of roughly 780 light-years (240 parsecs) from Earth, based upon parallax measurements with a 7% margin of error. The pair have a combined apparent visual magnitude of +5.65, which makes the system faintly visible to the naked eye.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Apus |
| Right ascension | 15h 40m 21.33360s |
| Declination | –73° 26′ 48.0648″ |
| Apparent magnitude (V) | 5.65 |
| Characteristics | |
| Spectral type | B7 III-IV + K0 V |
| U−B color index | –0.38 |
| B−V color index | –0.04 |
| Astrometry | |
| Radial velocity (Rv) | –19.0 km/s |
| Proper motion (μ) | RA: –12.36 mas/yr Dec.: –20.56 mas/yr |
| Parallax (π) | 4.18 ± 0.28 mas |
| Distance | 780 ± 50 ly (240 ± 20 pc) |
| Absolute magnitude (MV) | −1.24 |
| Details | |
| Luminosity | 351 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
The brighter star has a stellar classification of B7 III-IV, with the luminosity class of III-IV suggesting that it may lie in an intermediate stage between a subgiant and a giant star. The faint companion is a K-type main sequence star with a classification of K0 V. It has a visual magnitude of 12.5 and an angular separation of 15 arcseconds from the brighter member.
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