Zeta Pavonis

Star in the constellation Pavo

ζ Pavonis
Observation data Epoch J2000 Equinox J2000
Location of ζ Pavonis (circled)
Constellation	Pavo
Right ascension	18^h 43^m 02.13528^s^[1]
Declination	−71° 25′ 41.2065″^[1]
Apparent magnitude (V)	+4.01^[2]
Characteristics
Spectral type	K0III^[2]
U−B color index	+1.02^[3]
B−V color index	+1.13^[2]
Astrometry

Radial velocity (R_v)	−16.30^[4] km/s
Proper motion (μ)	RA: +0.81^[1] mas/yr Dec.: −158.15^[1] mas/yr
Parallax (π)	14.93 ± 0.18 mas^[1]
Distance	218 ± 3 ly (67.0 ± 0.8 pc)
Absolute magnitude (M_V)	−0.12^[2]

Details

Radius	19^[5] `R`_☉
Luminosity	155^[2] `L`_☉
Rotational velocity (v sin i)	10.0^[6] km/s

Other designations
ζ Pav, CPD−71° 2353, FK5 698, GC 25522, HD 171759, HIP 91792, HR 6982, SAO 257620, CCDM J18430-7125A, WDS J18430-7126A
Database references
SIMBAD	data

Zeta Pavonis, Latinized from ζ Pavonis, is an orange-hued star in the southern constellation Pavo. Its apparent magnitude is 4.01,^[2] which is bright enough to be faintly visible to the naked eye. The annual parallax shift of this star is 14.93 mas as seen from Earth,^[1] which provides a distance estimate of approximately 420 light-years (130 parsecs) away from the Sun. It is moving closer to the Sun with a radial velocity of −16.30.^[4] Based upon its motion through space, this star appears to be a member of the Hyades Supercluster.^[7]

This is an evolved K-type giant star with a stellar classification of K0 III,^[2] which indicates it has exhausted the supply of hydrogen at its core. The measured angular diameter of this star, after correction for limb darkening, is 2.63±0.07 mas.^[8] At the estimated distance of this star, this yields a physical size of about 19 times the radius of the Sun.^[5] The star is radiating 155^[2] times the Sun's luminosity.

Zeta Pavonis has a companion, probably optical, of apparent magnitude 12.0 at about 55.6" separation.^[9]^[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 ^f ^g ^h 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
^ Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
^ ^a ^b 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 Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(67.0\cdot 2.63\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 37.9\cdot R_{\bigodot }\end{aligned}}$
^ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G. Vizier catalog entry
^ Montes, D.; et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars" (PDF), Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x, S2CID 55727428, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04.
^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
^ Dommanget, J.; Nys, O. (2002). "VizieR Online Data Catalog: CCDM (Catalog of Components of Double & Multiple stars) (Dommanget+ 2002)". VizieR On-line Data Catalog: I/274. Originally Published in: Observations et Travaux 54. 1274. Bibcode:2002yCat.1274....0D. 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

Constellation of Pavo

Stars

Bayer	α (Peacock) β γ δ ε ζ η θ ι κ λ μ¹ μ² ν ξ ο π ρ σ τ υ φ¹ φ² ω
Variable	R V X Y SX AR BD KZ MW NU NZ V346 V347
HR	6586 6624 6634 6740 6760 6796 6805 6808 6828 6899 6908 6939 6996 7004 7012 7015 7022 7027 7111 7130 7161 7221 7278 7320 7383 7434 7435 7455 7498 7513 7527 7531 7558 7579 7587 7588 7644 7663 7691 7707 7732 7838 7872 7959 8019 8061 8073 8081 8125 8159
HD	161475 162521 164427 175007 175167 176522 179419 181433 186302 190984 192887 195190 195772 196050
Other	Gliese 693 SCR 1845−6357 SCR 1826−6542