Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Apus |
Right ascension | 15h 31m 30.82213s [1] |
Declination | −73° 23′ 22.5295″ [1] |
Apparent magnitude (V) | 5.52 [2] |
Characteristics | |
Spectral type | B1npe [3] |
U−B color index | −0.791 [2] |
B−V color index | −0.128 [2] |
Variable type | γ Cas [4] |
Astrometry | |
Radial velocity (Rv) | +62 [5] km/s |
Proper motion (μ) |
RA: +0.996
[1]
mas/
yr Dec.: −18.345 [1] mas/ yr |
Parallax (π) | 3.0798 ± 0.0717 mas [1] |
Distance | 1,060 ± 20
ly (325 ± 8 pc) |
Absolute magnitude (MV) | −2.47 [6] |
Details | |
Mass | 12.0±0.3 [7] M☉ |
Luminosity | 2,120 [6] L☉ |
Surface gravity (log g) | 3.90 [8] cgs |
Temperature | 21,500 [8] K |
Age | 5.6±1.0 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa1 Apodis, Latinized from κ1 Apodis, is the Bayer designation for a binary star [3] system in the southern circumpolar constellation of Apus. Based upon parallax measurements, it is located roughly 1,060 light-years (325 parsecs) from Earth. The combined apparent visual magnitude of the system is 5.52, [2] indicating that this is a faint, naked eye star that can be viewed in dark suburban skies. It is moving away from the Sun with a radial velocity of +62 km/s. [5]
This is a spectroscopic binary system with an orbital period of 0.6 days. [3] The combined spectrum matches a stellar classification of B1npe. [3] The 'e' suffix indicates that this is a Be star with emission lines in the spectrum. An 'n' means that the absorption lines in the spectrum are broadened from the Doppler effect as a result of rapid rotation. Finally, the 'p' shows some peculiarity in the spectrum. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +5.43 to +5.61.
This is a runaway star with a peculiar velocity of 69.8±4.7 km/s. [7] Because it is a binary star system, it was most likely not turned into a runaway system as the result of a supernova explosion. [3] A companion star is a 12th magnitude orange K-type subgiant located at an angular separation of 27 arcseconds.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Apus |
Right ascension | 15h 31m 30.82213s [1] |
Declination | −73° 23′ 22.5295″ [1] |
Apparent magnitude (V) | 5.52 [2] |
Characteristics | |
Spectral type | B1npe [3] |
U−B color index | −0.791 [2] |
B−V color index | −0.128 [2] |
Variable type | γ Cas [4] |
Astrometry | |
Radial velocity (Rv) | +62 [5] km/s |
Proper motion (μ) |
RA: +0.996
[1]
mas/
yr Dec.: −18.345 [1] mas/ yr |
Parallax (π) | 3.0798 ± 0.0717 mas [1] |
Distance | 1,060 ± 20
ly (325 ± 8 pc) |
Absolute magnitude (MV) | −2.47 [6] |
Details | |
Mass | 12.0±0.3 [7] M☉ |
Luminosity | 2,120 [6] L☉ |
Surface gravity (log g) | 3.90 [8] cgs |
Temperature | 21,500 [8] K |
Age | 5.6±1.0 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa1 Apodis, Latinized from κ1 Apodis, is the Bayer designation for a binary star [3] system in the southern circumpolar constellation of Apus. Based upon parallax measurements, it is located roughly 1,060 light-years (325 parsecs) from Earth. The combined apparent visual magnitude of the system is 5.52, [2] indicating that this is a faint, naked eye star that can be viewed in dark suburban skies. It is moving away from the Sun with a radial velocity of +62 km/s. [5]
This is a spectroscopic binary system with an orbital period of 0.6 days. [3] The combined spectrum matches a stellar classification of B1npe. [3] The 'e' suffix indicates that this is a Be star with emission lines in the spectrum. An 'n' means that the absorption lines in the spectrum are broadened from the Doppler effect as a result of rapid rotation. Finally, the 'p' shows some peculiarity in the spectrum. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +5.43 to +5.61.
This is a runaway star with a peculiar velocity of 69.8±4.7 km/s. [7] Because it is a binary star system, it was most likely not turned into a runaway system as the result of a supernova explosion. [3] A companion star is a 12th magnitude orange K-type subgiant located at an angular separation of 27 arcseconds.