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HD 167096

Location of HD 167096 (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Corona Australis
Right ascension	18 15 53.45211
Declination	−44° 12′ 23.2322″
Apparent magnitude (V)	5.45±0.01
Characteristics
Spectral type	G8/K0 III
B−V color index	+0.96
Astrometry
Radial velocity (Rv)	−27±13.7 km/s
Proper motion (μ)	RA: +67.283 mas/yr Dec.: +12.211 mas/yr
Parallax (π)	14.5746 ± 0.4724 mas
Distance	224 ± 7 ly (69 ± 2 pc)
Absolute magnitude (MV)	+0.64
Orbit
Period (P)	1.811595±0.102779 yr
Semi-major axis (a)	8.1±0.9 mas
Eccentricity (e)	0.00
Details
A
Mass	1.11±0.51 M☉
Radius	8.92±0.45 R☉
Luminosity	32.4±0.7 L☉
Surface gravity (log g)	2.51±0.46 cgs
Temperature	4,886±123 K
Metallicity	−0.02 dex
Rotational velocity (v sin i)	<1.6 km/s
Other designations
4 G. Coronae Australis[14], CD−44°12456, CPD−44°9034, GC 24892, HD 167096, HIP 89507, HR 6818, SAO 228854, WDS 18159-4412
Database references
SIMBAD	data

HD 167096, also known as HR 6818 or rarely 4 G. Coronae Australis, is a binary star located in the southern constellation Corona Australis. It has an apparent magnitude of 5.45, making it faintly visible to the naked eye. The system is located relatively close at a distance of 224 light years based on Gaia DR3 parallax measurements but is drifting closer with a poorly constrained heliocentric radial velocity of −27 km/s. At its current distance HD 167096's brightness is diminished by three tenths of a magnitudes due to interstellar dust and it has an absolute magnitude of +0.64.

The primary has a stellar classification of G8/K0 III, indicating that it is an evolved red giant with the characteristics of a G8 and K0 giant star. It has 1.11 times the mass of the Sun but it has expanded to 8.92 times the Sun's radius. It radiates 32.4 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,886 K, giving it an orangish-yellow hue. It has a near solar metallicity at = −0.02 and spins too slowly for its projected rotational velocity to be measured accurately. This is a binary star that completes a circular orbit within 1.81 years. Since the two components have a separation of only 8.1 mas, it makes it difficult to measure their individual properties.

References

1. ^ 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.
2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361. S2CID 17128864.
3. ^ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.
4. Corben, P. M. (1966). "Photoelectric magnitudes and colours for bright southern stars". Monthly Notes of the Astronomical Society of South Africa. 25: 44. Bibcode:1966MNSSA..25...44C. ISSN 0024-8266.
5. ^ Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. eISSN 1521-3994. ISSN 0004-6337. S2CID 119323941.
6. ^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
7. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (October 2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. eISSN 1432-0746. ISSN 0004-6361. S2CID 122594428.
8. ^ Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. ISSN 0004-6361. S2CID 13365201.
9. ^ Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants. Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361. S2CID 6077801.
10. ^ 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.
11. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
12. ^ Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361. S2CID 131780028.
13. De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars *". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361. S2CID 54046583.
14. Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
15. "HD 167096". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved March 18, 2023.
16. Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711. S2CID 14878976.
17. Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.

v t e Constellation of Corona Australis
List of stars in Corona Australis Corona Australis in Chinese astronomy
Stars	Bayer α (Meridiana) β γ δ ε ζ η η θ κ κ λ μ σ Tel Variable R S T V TY WX V686 V691 V692 V701 V718 HR 6749 6750 6786 6862 6910 6931 6937 6942 6948 7031 7122 7177 7232 7257 7281 HD 166473 166724 Other RX J1856.5−3754
Exoplanets HD 177565 b
Star clusters Coronet Cluster NGC 6541
Nebulae NGC 6729
Category

• G-type giants
• K-type giants
• Binary stars
• Corona Australis
• Gould objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects