Kappa2 Apodis

κ2 Apodis
Location of κ2 Apodis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Apus
Right ascension 15h 40m 21.33360s[1]
Declination –73° 26′ 48.0648″[1]
Apparent magnitude (V) 5.65[2]
Characteristics
Spectral type B7 III-IV + K0 V[3]
U−B color index –0.38[2]
B−V color index –0.04[2]
Astrometry
Radial velocity (Rv)–19.0[4] km/s
Proper motion (μ) RA: –12.36[1] mas/yr
Dec.: –20.56[1] mas/yr
Parallax (π)4.18 ± 0.28 mas[1]
Distance780 ± 50 ly
(240 ± 20 pc)
Absolute magnitude (MV)−1.24[5]
Details
Luminosity351[5] L☉
Other designations
CPD–73° 1625, HD 138800, HIP 76750, HR 5782, SAO 257307.[6]
Database references
SIMBADdata

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,[2] which makes the system faintly visible to the naked eye.

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.[7] 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.[3]

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference mnras389_2_869 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference houk1978 was invoked but never defined (see the help page).