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HD 94717

Location of HD 94717 on the map (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Chamaeleon
Right ascension	10 52 28.63166
Declination	−79° 33′ 33.9765″
Apparent magnitude (V)	6.34±0.01
Characteristics
Spectral type	K2 II/III
U−B color index	+1.57
B−V color index	+1.46
Astrometry
Radial velocity (Rv)	3.4±0.5 km/s
Proper motion (μ)	RA: −11.341 mas/yr Dec.: +1.655 mas/yr
Parallax (π)	1.8682 ± 0.021 mas
Distance	1,750 ± 20 ly (535 ± 6 pc)
Absolute magnitude (MV)	−2.10
Details
Mass	6.3±0.7 M☉
Radius	77.8±3.9 R☉
Luminosity	1,847 −49 L☉
Surface gravity (log g)	1.47±0.04 cgs
Temperature	4,446±122 K
Metallicity	−0.01 dex
Rotational velocity (v sin i)	2.4±1.3 km/s
Age	63±20 Myr
Other designations
28 G. Chamaeleontis[11], CD−78°438, CPD−78°589, GC 14988, HD 94717, HIP 53151, HR 4268, SAO 256768
Database references
SIMBAD	data

HD 94717, also known as HR 4268, is a solitary orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. The object is located relatively far at a distance of 1,750 light years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of 3.4 km/s. At its current distance, HD 94717's brightness is diminished by 0.62 magnitudes due to interstellar dust.

HD 94717 has a stellar classification of K2 II/III, indicating that it is an evolved red giant with the blended luminosity class of a giant star and a bright giant. It is estimated to be 63 million years old, enough time for it to cool and expand to 78 times the Sun's radius. It has 6.3 times the mass of the Sun and radiates 1,847 times the luminosity of the Sun from its photosphere at an effective temperature of 4,446 K. HD 94717 has a solar metallicity and spins modestly with a projected rotational velocity of 2.4 km/s.

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.
3. ^ 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°. Bibcode:1975mcts.book.....H.
4. ^ 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.
5. ^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
6. Corbally, C. J.; Garrison, R. F. (1984). "Which Map of Absolute Magnitudes: Keenan or Schmidt-Kaler?". The Mk Process and Stellar Classification: 277. Bibcode:1984mpsc.conf..277C.
7. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (October 12, 2010). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1). Oxford University Press (OUP): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. ISSN 0035-8711.
8. ^ Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". 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.
9. ^ 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.
10. ^ 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". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361.
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.
12. "HD 94717". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 December 2022.
13. Guarinos, J. (February 1995). "VizieR Online Data Catalog: Interstellar matter in the Galactic Disk (Guarinos J., 1992)". VizieR Online Data Catalog: 301V/86. Bibcode:1995yCat.5086....0G.

v t e Constellation of Chamaeleon
List of stars in Chamaeleon Chamaeleon in Chinese astronomy
Stars	Bayer α β γ δ δ ε ζ η θ ι κ μ μ ν π Variable R T Z RS RZ CT CU DI DR DX DY HR 3393 3543 3695 4170 4268 4385 4397 4507 4509 4649 4976 5188 HD 63454 (Ceibo) 115088 116852 Other 2MASS J11011926–7732383 AB ChaHα8 CHXR 73 L 34-26 WISEA J120037.79-784508.3
Exoplanets Cha 110913−773444 ChaHα8 b COCONUTS-2b HD 63454 b OTS 44
Star clusters η Chamaeleontis cluster
Nebulae Chamaeleon complex NGC 3195 IC 2631
Galaxies	NGC 2915
Category

• K-type giants
• K-type bright giants
• Chamaeleon
• Gould objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects