Rho Pavonis

Variable star in the constellation Pavo

Rho Pavonis
Observation data Epoch J2000 Equinox J2000
Location of ρ Pavonis (circled)
Constellation	Pavo
Right ascension	20^h 37^m 35.31275^s^[1]
Declination	−61° 31′ 47.7145″^[1]
Apparent magnitude (V)	4.86^[2] (4.85 – 4.91)^[3]
Characteristics
Spectral type	Fm δ Del^[4]
U−B color index	+0.19^[3]
B−V color index	+0.43^[3]
Variable type	δ Sct^[5]
Astrometry

Radial velocity (R_v)	+8.0±0.8^[2] km/s
Proper motion (μ)	RA: +59.61^[1] mas/yr Dec.: −72.69^[1] mas/yr
Parallax (π)	17.20 ± 0.24 mas^[1]
Distance	190 ± 3 ly (58.1 ± 0.8 pc)
Absolute magnitude (M_V)	1.04^[6]

Details

Radius	4.33+0.39 −0.17^[7] `R`_☉
Luminosity	34.1±0.8^[7] `L`_☉
Temperature	6,704+136 −285^[7] K
Rotational velocity (v sin i)	45.0^[8] km/s

Other designations
ρ Pav, CPD−61°6495, FK5 3647, GC 28668, HD 195961, HIP 101773, HR 7859, SAO 254835^[9]
Database references
SIMBAD	data

Rho Pavonis, Latinized from ρ Pavonis, is a single,^[10] variable star in the southern constellation of Pavo. It is yellow-white in hue and faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.86.^[2] The star is located at a distance of approximately 190 light years from the Sun based on parallax,^[1] and is drifting further away with a radial velocity of +8 km/s.^[2] It is a candidate outlying member of the Tucana Association of co-moving stars.^[11]

A light curve for Rho Pavonis, plotted from *TESS* data^[12]

This is a metallic-line star with a stellar classification of Fm δ Del,^[4] where the suffix notation indicating it is a δ Delphini star. It is a Delta Scuti variable, varying in brightness by 0.03 magnitudes.^[13] The dominant pulsation period is 2.74 hours, but the effects of other pulsation periods are apparent in the light curve.^[14] The star has 4.3^[7] times the girth of the Sun and is spinning with a projected rotational velocity of 45 km/s.^[8] It is radiating 34^[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,704 K.^[7]

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 Gontcharov, G. A. (November 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 Garcia, J. R.; Cebral, J. R.; Scoccimarro, E. R.; Wahnon, P.; Arena, R.; Bazterra, V.; Pellizza, L.; Risi, A.; Rodriguez, M. L.; Zimmermann, M. (1995). "A catalogue of variable stars in the lower instability strip". Astronomy and Astrophysics Supplement. 109: 201. Bibcode:1995A&AS..109..201G.
^ ^a ^b Houk, N.; Cowley, A. P. (1975), Michigan catalogue of two-dimensional spectral types for the HD stars. Declinations -90_ to -53_ƒ0, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H
^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-Line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b Głȩbocki, R.; Gnaciński, P. (March 2005), "Catalog of Stellar Rotational Velocities", VizieR On-Line Data Catalog: III/244. Originally Published in: Proceedings of the 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 3244, Bibcode:2005yCat.3244....0G Vizier catalog entry
^ "rho Pav". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-16.
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
^ Zuckerman, B.; et al. (September 2001). "Tucana Association". The Astrophysical Journal. 559 (1): 388–394. Bibcode:2001ApJ...559..388Z. doi:10.1086/322305.
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^ Rodríguez, E.; et al. (June 2000). "A revised catalogue of delta Sct stars". Astronomy and Astrophysics Supplement. 144 (3): 469–474. Bibcode:2000A&AS..144..469R. doi:10.1051/aas:2000221. hdl:10261/226673.
^ Kurtz, D. W. (March 1981). "The δ Scuti variability of the high metallicity δ Del star, rho Pavonis". Monthly Notices of the Royal Astronomical Society. 194: 737–746. doi:10.1093/mnras/194.3.737.

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