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Eta Phoenicis - Wikipedia

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η Phoenicis
Observation data Epoch J2000 Equinox J2000
Location of η Phoenicis (circled)
Constellation	Phoenix
Right ascension	00^h 43^m 21.23841^s^[1]
Declination	−57° 27′ 47.0073″^[1]
Apparent magnitude (V)	4.36^[2]
Characteristics
Spectral type	A0IV^[2]
U−B color index	-0.02^[3]
B−V color index	+0.00^[3]
Astrometry

Radial velocity (R_v)	+7.70^[4] km/s
Proper motion (μ)	RA: -5.07^[1] mas/yr Dec.: +16.51^[1] mas/yr
Parallax (π)	13.24 ± 0.34 mas^[1]
Distance	246 ± 6 ly (76 ± 2 pc)
Absolute magnitude (M_V)	-0.03^[2]

Details

Mass	2.93^[5] `M`_☉
Luminosity	120^[5] `L`_☉
Surface gravity (log g)	3.85^[6] cgs
Temperature	9,822^[6] K
Metallicity [Fe/H]	0.00^[7] dex
Rotational velocity (v sin i)	124^[5] km/s

Other designations
CCDM J00434-5728A, FK5 23, GC 866, HIP 3405, HR 191, HD 4150, SAO 232162, WDS J00434-5728A
Database references
SIMBAD	data

Eta Phoenicis (η Phe) is a class A0IV^[2] (white subgiant) star in the constellation Phoenix. Its apparent magnitude is 4.36^[2] and it is approximately 246 light years away based on parallax.^[1]

Eta Phoenicis has two reported companions; in addition to a distant secondary, B, at magnitude 11.5 and separation 20", the primary has a reported companion Ab with an estimated separation of 6.8 AU, a period slightly longer than 10 years, a magnitude of 8.5, and a spectral type around G5V.^[8]^[9] The primary is surrounded by an orbiting debris disk.^[10]

References

^ ^a ^b ^c ^d ^e ^f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
^ ^a ^b ^c ^d ^e Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
^ ^a ^b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ ^a ^b ^c Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
^ ^a ^b David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
^ Marion, L.; Absil, O.; Ertel, S.; Le Bouquin, J.-B.; Augereau, J.-C.; Blind, N.; Defrère, D.; Lebreton, J.; Milli, J. (2014). "Searching for faint companions with VLTI/PIONIER". Astronomy & Astrophysics. 570: A127. arXiv:1409.6105. Bibcode:2014A&A...570A.127M. doi:10.1051/0004-6361/201424780. S2CID 8756486.
^ Marion, L.; et al. (October 2014), "Searching for faint companions with VLTI/PIONIER. II. 92 main sequence stars from the Exozodi survey", Astronomy & Astrophysics, 570: 12, arXiv:1409.6105, Bibcode:2014A&A...570A.127M, doi:10.1051/0004-6361/201424780, S2CID 8756486, A127.

Constellation of Phoenix

Stars

Bayer	α (Ankaa) β γ δ ε ζ (Wurren) η θ ι κ λ¹ λ² μ ν ξ π ρ σ τ υ φ χ ψ ω
Variable	RV SX YZ AD AE AI AW AZ BB BD
HR	6 23 73 109 111 120 140 148 162 171 198 202 209 229 299 350 408 411 443 447 519 524 537 574 588 632 636 659 686 698 706 8910 8920 8929 8959 8993 9001 9046 9077 9082
HD	2039 5388 6434 (Nenque) 8535 9895 11421 13218 13387 223549 224782
Other	CD-44 170 BPM 30551 HE 0107-5240 NGC 405 WASP-4 WASP-5 WASP-18 WASP-29 WASP-96 WD 2359-434

Exoplanets	HD 142 b HD 2039 b HD 6434 b HD 8535 b HIP 65Ab WASP-4b WASP-5b WASP-18b WASP-96b

Galaxies

NGC	25 28 31 37 87 88 89 92 98 119 159 212 238 312 319 322 323 324 328 348 368 454 482 625
Other	Phoenix Dwarf

Galaxy clusters	El Gordo Phoenix Cluster Robert's Quartet