HD 73526
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08h 37m 16.484s[1] |
| Declination | −41° 19′ 08.76″[1] |
| Apparent magnitude (V) | +9.00 |
| Characteristics | |
| Spectral type | G6V |
| U−B color index | ? |
| B−V color index | 0.69 |
| V−R color index | ? |
| R−I color index | ? |
| Variable type | “None” |
| Astrometry | |
| Radial velocity (Rv) | +26.1 km/s |
| Proper motion (μ) | RA: -59.95 ± 0.86[1] mas/yr Dec.: 162.23 ± 0.92[1] mas/yr |
| Parallax (π) | 9.93 ± 1.01 mas[1] |
| Distance | approx. 330 ly (approx. 100 pc) |
| Absolute magnitude (MV) | +4.02 |
| Details | |
| Mass | 1.02 M☉ |
| Radius | 1.49 R☉ |
| Luminosity | 1.77 L☉ |
| Surface gravity (log g) | 4.08 cgs |
| Temperature | 5470 K |
| Metallicity | +0.28 |
| Rotation | ? days |
| Age | 5.59 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 73526 is a yellow dwarf star (G6V) about 323 light-years away in the constellation Vela.
Star
The star is cooler, more luminous, similar mass, and larger than our Sun. This star is 22% older than our Sun and with metallicity nearly doubled with the Sun, based on its abundance of iron.
Planetary system
In 2002, a 2.1 MJ planet HD 73526 b was discovered orbiting its star in an orbit just a little smaller than that of Venus' orbit around the Sun.[2] This planet receives insolation 3.65 times that of Earth or 1.89 times that of Venus. This single planetary system was known for four years until 2006 when 2.3 MJ second planet HD 73526 c was found. This planet forms 2:1 orbital resonance with the planet b.[3] Although those masses are minimal as inclinations of these planets are not known, orbital stability analysis indicated that orbital inclinations of both planets are likely to be near 90°, making minimum masses very close to the true masses of the planets.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.07 ± 0.16 MJ | 0.66 ± 0.05 | 187.5 ± 0.3 | 0.39 ± 0.05 | — | — |
| c | >2.30 ± 0.17 MJ | 1.05 ± 0.08 | 376.9 ± 0.9 | 0.40 ± 0.05 | — | — |
See also
References
- ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ^ Tinney, C. G.; et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal. 587 (1): 423–428. arXiv:astro-ph/0207128. Bibcode:2003ApJ...587..423T. doi:10.1086/368068.
- ^ a b Tinney, C. G.; et al. (2006). "The 2 : 1 Resonant Exoplanetary System Orbiting HD 73526". The Astrophysical Journal. 647 (1): 594–599. arXiv:astro-ph/0602557. Bibcode:2006ApJ...647..594T. doi:10.1086/503706.
- ^ A Detailed Analysis of the HD 73526 2:1 Resonant Planetary System: Robert A. Wittenmyer, Xianyu Tan, Man Hoi Lee, Jonathan Horner, C.G. Tinney, R.P. Butler, G.S. Salter, B.D. Carter, H.R.A. Jones, S.J. O'Toole, J. Bailey, D. Wright, J.D. Crane, S.A. Schectman, P. Arriagada, I. Thompson, D. Minniti, M. Diaz
External links
- "HD 73526". The Extrasolar Planets Encyclopaedia.
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona
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