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Delta Coronae Australis is a single star located in the southern constellation of Corona Australis. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.57. The star is located about 174 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +21 km/s.

This object is an evolved giant star with a stellar classification of K1III. After exhausting the supply of hydrogen at its core, the star expanded off the main sequence and now has 11 times the radius of the Sun. It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through core helium fusion. The star is 2.8 billion years old with 1.5 times the mass of the Sun. It is radiating 55 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,654 K.

References

1. ^ 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.
2. ^ 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.
3. ^ Gallenne, A.; et al. (August 2018). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics. 616: 12. arXiv:1806.09572. Bibcode:2018A&A...616A..68G. doi:10.1051/0004-6361/201833341. S2CID 119331707. A68.
4. ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
5. ^ Liu, Y. J.; et al. (2007). "The abundances of nearby red clump giants". Monthly Notices of the Royal Astronomical Society. 382 (2): 553–66. Bibcode:2007MNRAS.382..553L. doi:10.1111/j.1365-2966.2007.11852.x.
6. "del CrA". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-20.
7. Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.

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

• K-type giants
• Horizontal-branch stars
• Corona Australis
• Bayer objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects