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HD 49947 (HR 2531) is a solitary star in the southern circumpolar constellation Volans. It has an apparent magnitude of 6.36, placing it near the max naked eye visibility. Parallax measurements place the object at a distance of 459 light years but is receding with a heliocentric radial velocity of 15.88 km/s

HD 49947 has a stellar classification of G8 III and is a red clump giant, meaning that it is located on the warm end of the horizontal branch. At present it has double the mass of the Sun and at an age of 1.27 billion years, has expanded to an enlarged radius of 10.33 solar radii. It radiates at 61 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,964 K, giving a yellow hue. HD 49947 is metal deficient with an iron abundance 68% that of Sun and spins very slowly.

References

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4. ^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
5. ^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
6. Steinmetz, Matthias; et al. (27 July 2020). "The Sixth Data Release of the Radial Velocity Experiment (Rave). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances". The Astronomical Journal. 160 (2): 83. arXiv:2002.04512. Bibcode:2020AJ....160...83S. doi:10.3847/1538-3881/ab9ab8. eISSN 1538-3881.
7. ^ Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (January 2022). "CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars". Astronomy & Astrophysics. 657: A87. arXiv:2201.01528. Bibcode:2022A&A...657A..87O. doi:10.1051/0004-6361/202040078. ISSN 0004-6361.
8. ^ 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. ISSN 0004-6361.
9. ^ Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv:0804.4473. Bibcode:2008ApJS..178...89D. doi:10.1086/589654. eISSN 1538-4365. ISSN 0067-0049.
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11. 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.

v t e Constellation of Volans
List of stars in Volans Volans in Chinese astronomy
Stars	Bayer α β γ δ ε ζ η θ ι κ Variable R S UY HR 2505 2531 2536 2662 2712 2888 2979 2980 3036 3038 3081 3171 3280 3346 3370 3417 3491 3495 3537 3544 3610 HD 59640 68402 74423 76700 Other L 98-59 L 97-12 WD 0806−661 WISE 0734−7157
Exoplanets HD 68402 b HD 76700 b L 98-59 b
Galaxies	NGC 2305 2397 2442 2443 2466 Other AM 0644-741
Galaxy clusters SMACS J0723.3–7327
Category

• G-type giants
• Volans
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects
• Gould objects
• Durchmusterung objects