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HD 223311 - Wikipedia

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HD 223311
Observation data Epoch J2000 Equinox J2000
Constellation	Aquarius^[1]
Right ascension	23^h 48^m 32.47911^s^[2]
Declination	−06° 22′ 49.5328″^[2]
Apparent magnitude (V)	6.08^[3]
Characteristics
Spectral type	K4III^[4]
U−B color index	+1.71^[3]
B−V color index	+1.452^[4]
Variable type	suspected^[5]
Astrometry

Radial velocity (R_v)	−20.069±0.008^[4] km/s
Proper motion (μ)	RA: +0.01^[6] mas/yr Dec.: −19.04^[6] mas/yr
Parallax (π)	3.5950±0.0884 mas^[2]
Distance	910 ± 20 ly (278 ± 7 pc)
Absolute magnitude (M_V)	−0.80^[1]

Details

Mass	5.0^[7] `M`_☉
Radius	40.78+3.27 −7.51^[2] `R`_☉
Luminosity	496±15^[2] `L`_☉
Surface gravity (log g)	1.04^[8] cgs
Temperature	4,267+457 −162^[2] K
Metallicity [Fe/H]	−0.43^[8] dex
Rotational velocity (v sin i)	1.7^[9] km/s
Age	1.8^[10] Gyr

Other designations
NSV 14715, BD−07°6086, FK5 3912, HD 223311, HIP 117420, HR 9014, SAO 146919^[11]
Database references
SIMBAD	data

HD 223311 is a star in the equatorial constellation of Aquarius. It has an orange hue and is visible to the naked eye as a dim star with an apparent visual magnitude of 6.08.^[3] Based on parallax measurements, the star is located at a distance of approximately 910 light years from the Sun. It is a radial velocity standard^[12] star that is drifting closer to the Sun at the rate of −20 km/s.^[4] The star is situated near the ecliptic and thus is subject to lunar occultations.^[13]

This is an aging K-type giant star with a stellar classification of K4III.^[4] Having exhausted the supply of hydrogen at its core, it has cooled and expanded off the main sequence. At present it has 41 times the girth of the Sun.^[2] It is a suspected variable star of unknown type that has been measured ranging in brightness from magnitude 5.01 down to 5.26 in the infrared I band.^[5] The star is radiating 496 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,267 K.^[2]

References

^ ^a ^b 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.
^ ^a ^b ^c ^d ^e ^f ^g ^h 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 ^c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
^ ^a ^b ^c ^d ^e Soubiran, C.; et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", Astronomy & Astrophysics, 552: 11, arXiv:1302.1905, Bibcode:2013A&A...552A..64S, doi:10.1051/0004-6361/201220927, S2CID 56094559, A64.
^ ^a ^b Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
^ ^a ^b 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.
^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics. 685: A59. arXiv:2212.11639. Bibcode:2024A&A...685A..59M. doi:10.1051/0004-6361/202245762.
^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762.
^ Huang, Yang; Beers, Timothy C.; Wolf, Christian; Lee, Young Sun; Onken, Christopher A.; Yuan, Haibo; Shank, Derek; Zhang, Huawei; Wang, Chun; Shi, Jianrong; Fan, Zhou (2022). "Beyond Spectroscopy. I. Metallicities, Distances, and Age Estimates for over 20 Million Stars from SMSS DR2 and Gaia EDR3". The Astrophysical Journal. 925 (2): 164. arXiv:2104.14154. Bibcode:2022ApJ...925..164H. doi:10.3847/1538-4357/ac21cb.
^ "HD 223311". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-16.
^ Crifo, F.; et al. (December 2010), "Towards a new full-sky list of radial velocity standard stars", Astronomy and Astrophysics, 524: 8, arXiv:1010.0613, Bibcode:2010A&A...524A..10C, doi:10.1051/0004-6361/201015315, S2CID 115151425, A10.
^ Blow, G. L.; et al. (November 1982), "Photoelectric observations of lunar occultations. XIII", Astronomical Journal, 87: 1571–1584, Bibcode:1982AJ.....87.1571B, doi:10.1086/113247.

External links

Image HD 223311

Constellation of Aquarius

Stars

Bayer	α (Sadalmelik) β (Sadalsuud) γ (Sadachbia) δ (Skat) ε (Albali) ζ η θ (Ancha) ι κ (Situla) λ (Hydor) μ ν ξ (Bunda) ο π ρ σ τ¹ τ² υ φ χ ψ¹ ψ² ψ³ ω¹ ω²
Flamsteed	1 3 4 5 7 8 9 10 11 12 14 15 16 17 18 19 20 21 24 25 26 28 29 30 32 35 36 37 38 39 40 41 42 44 45 47 49 50 51 53 54 56 58 60 61 64 65 66 67 68 70 72 74 75 77 78 81 82 83 84 85 86 87 88 (Safina) 89 94 96 97 98 99 100 101 103 104 106 107 108
Variable	R U AE DV EP EW EZ FK FL FO HK HU IL IZ LL LP
HR	8017 8056 8121 8263 8363 8453 8500 8507 8581 8612 8629 8645 8716 8783 8836 8856 8879 8924 9014
HD	206610 (Bosona) 210277 212771 (Lionrock) 215152 219617 220466 220689 222093 222582
Other	2MASS J21392676+0220226 BD−22 5866 Fomalhaut C Gliese 849 K2-21 K2-28 K2-58 K2-72 K2-138 LS IV-14 116 Sneden's Star TRAPPIST-1 WASP-6 (Márohu) WASP-47 WASP-69 (Wouri) WASP-75

Exoplanets	ψ¹ Aquarii b Gliese 849 b Gliese 876 b c d e HD 206610 b HD 210277 b HD 212771 b (Victoriapeak) HD 221416 b HD 222582 b K2-66b K2-72b c d e K2-138b TRAPPIST-1b c d e f g h WASP-6b

Star clusters	Messier 2 Messier 72 Messier 73

Nebulae	Helix Nebula Saturn Nebula

Galaxies

NGC	6975 7001 7010 7047 7051 7065 7069 7077 7081 7184 7222 7252 7257 7301 7302 7393 7492 7585 7592 7600 7606 7723 7727 7759
Other	Aquarius Dwarf ESO 603-G21 Lyman-alpha blob 1 MR 2251-178 PGC 1228197 PHL 293B PKS 2134+004 SMM J2135-0102 WISE J224607.57−052635.0 J2345-0449

Galaxy clusters	Abell 2597 RXC J2211.7-0350 XMMXCS 2215-1738

Astronomical events	SN 2213-1745