Eta Apodis

η Apodis
Observation data Epoch J2000 Equinox J2000
Constellation	Apus
Right ascension	14^h 18^m 13.8961^s^[1]
Declination	−81° 00′ 27.937″^[1]
Apparent magnitude (V)	+4.89
Characteristics
Spectral type	A2m^[2]
U−B color index	+0.11^[3]
B−V color index	+0.25^[3]
Astrometry

Radial velocity (R_v)	−9.4^[4] km/s
Proper motion (μ)	RA: -19.95^[1] mas/yr Dec.: -65.39^[1] mas/yr
Parallax (π)	23.36 ± 0.50^[1] mas
Distance	140 ± 3 ly (42.8 ± 0.9 pc)

Details

Radius	2.13^[5] R_☉
Luminosity	15.5^[5] L_☉
Temperature	7,860^[5] K
Rotational velocity (v sin i)	15^[5] km/s

Other designations
HR 5303, CD -80°706, HD 123998, SAO 258693, FK5 3129, HIP 69896.
Database references
SIMBAD	data

Eta Apodis (η Aps, η Apodis) is a star in the constellation Apus. It is approximately 140 light years from Earth.^[1]

The stellar classification shows this is an Am star, which means it is chemically peculiar with magnetic lines in the spectrum.^[2] Based upon observations with the Spitzer Space Telescope, this system is emitting an excess of 24 μm infrared radiation. This may be caused by a debris disk of dust orbiting at a distance of more than 31 astronomical units from the star.^[5]

References

^ ^a ^b ^c ^d ^e ^f Perryman, M. A. C.; et al (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P.
^ ^a ^b Bychkov, V. D.; Bychkova, L. V.; Madej, J. (August 2003). "Catalogue of averaged stellar effective magnetic fields. I. Chemically peculiar A and B type stars". Astronomy and Astrophysics 407: 631–642. arXiv:astro-ph/0307356. Bibcode 2003A&A...407..631B. doi:10.1051/0004-6361:20030741.
^ ^a ^b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory 4 (99). Bibcode 1966CoLPL...4...99J.
^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode 1953QB901.W495......
^ ^a ^b ^c ^d ^e Plavchan, Peter; et al. (June 2009). "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope". The Astrophysical Journal 698 (2): 1068–1094. Bibcode 2009ApJ...698.1068P. doi:10.1088/0004-637X/698/2/1068.