Delta Apodis

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**δ¹ Apodis**
Observation data Epoch J2000
δ Apodis
Constellation (pronunciation)	Apus
Right ascension	16^h 20^m 20.8056^s
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	Mira
Astrometry
Radial velocity (R_v)	-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 (M_V)	6.35
Details
Metallicity	?
Rotation	?
Age	? years
Visual binary orbit
Companion	δ Apodis B
Semimajor axis (a)	102.9"
Inclination (i)	12°
Visual binary orbit
Companion	δ Apodis C
Semimajor axis (a)	90.5"
Inclination (i)	74°
Other designations
HR 6020, HD 145366, CP-78°1092, FK5 1424, HIP 80047, SAO 257380, GC 21862, CCDM 16204-7841.
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.

[edit] Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
δ Apodis B (HD 145388) or δ² Apodis	16^h 20^m 26.8588^s	-78° 40' 02.985	5.276	K3III	Simbad
δ Apodis C (CPD-78 1093C)	16^h 20^m 50.3^s	-78° 41' 13	12.5		Simbad