Delta Apodis

δ¹ Apodis

Location of δ¹ Apodis (center)
Observation data Epoch J2000      Equinox J2000
Constellation	Apus
Right ascension	16h 20m 20.8056s
Declination	-78° 41′ 44.682″
Apparent magnitude (V)	4.76
Characteristics
Spectral type	M5IIIb
U−B color index	1.69
B−V color index	1.69
Variable type	irregular variable
Astrometry
Radial velocity (Rv)	-12 km/s
Proper motion (μ)	RA: -9.91 mas/yr Dec.: -36.59 mas/yr
Parallax (π)	4.26 ± 0.57 mas
Distance	approx. 800 ly (approx. 230 pc)
Absolute magnitude (MV)	-2.3
Details
Mass	5 M☉
Radius	125 R☉
Luminosity	2500 L☉
Temperature	3100 K
Other designations
HR 6020, HD 145366, CP-78°1092, FK5 1424, HIP 80047, SAO 257380.
Database references
SIMBAD	data
Database references
SIMBAD	data

Delta Apodis (δ Aps, δ Apodis) is a double star in the constellation Apus.

The brighter of the pair, δ¹ Apodis, is a M-type red giant with a mean apparent magnitude of +4.68. It is classified as an irregular variable star and its brightness varies from magnitude +4.66 to +4.87. At a separation of 102.9 arcseconds is δ² Apodis, an orange K-type giant with an apparent magnitude of +5.27.

Hipparcos data report the distance to δ¹ Apodis to be approximately 770 light years, while δ² Apodis is found to be approximately 663 light years from Earth. The error in these measurements are such that it is not certain if these two stars form a gravitationally bound system. They have a common proper motion, which lends support to the idea that they are gravitationally interacting.

References

• Image δ Apodis