Astronomy:HD 40235
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Short description: Giant star in the constellation Lepus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lepus[1] |
| Right ascension | 05h 56m 34.4388s[2] |
| Declination | −23° 12′ 55.121″[2] |
| Apparent magnitude (V) | 6.37[1] |
| Characteristics | |
| Spectral type | K0III[1] |
| B−V color index | 1.068±0.002[1] |
| Astrometry | |
| Radial velocity (Rv) | −4.64±0.12[2] km/s |
| Proper motion (μ) | RA: +13.817[2] mas/yr Dec.: +29.448[2] mas/yr |
| Parallax (π) | 6.8612 ± 0.0187[2] mas |
| Distance | 475 ± 1 ly (145.7 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.69[1] |
| Details | |
| Mass | 1.51[3] M☉ |
| Radius | 11.6[4] R☉ |
| Luminosity | 60[4] L☉ |
| Surface gravity (log g) | 2.78±0.03[5] cgs |
| Temperature | 4,853±22[5] K |
| Metallicity [Fe/H] | −0.10±0.01[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 40235 is a star in the constellation Lepus. At an apparent magnitude of 6.37, it is faintly visible to the naked eye in locations far from light pollution. Parallax measurements give a distance of 475 light-years (145.7 parsecs).
The spectrum of this star matches a spectral class of K0III,[1] with the luminosity class III indicating it is a giant that has exhausted the hydrogen at its core. The star has a mass 1.51 times the mass of the Sun[3] and has expanded to 11.6 times the Sun's radius. It now radiates 60 times the Sun's luminosity from its photosphere[4] at an effective temperature of 4,853 K.[5] This temperature give it the orange hue typical of a K-type star.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardèvol, J.; Casamiquela, L.; Figueras, F.; Jiménez-Arranz, Ó. et al. (2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy and Astrophysics 658: A91. doi:10.1051/0004-6361/202142369. Bibcode: 2022A&A...658A..91A.
- ↑ 4.0 4.1 4.2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society 471 (1): 770. doi:10.1093/mnras/stx1433. Bibcode: 2017MNRAS.471..770M.
- ↑ 5.0 5.1 5.2 5.3 Huson, Dylan; Cowan, Indiana; Sizemore, Logan; Kounkel, Marina; Hutchinson, Brian (2025). "Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages". The Astrophysical Journal 984 (1): 58. doi:10.3847/1538-4357/adc2fa. Bibcode: 2025ApJ...984...58H.
- ↑ "HD 40235". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+40235.
- ↑ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html. Retrieved 2012-01-16.
Coordinates: 
05h 56m 34.439s, −23° 12′ 55.12″
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