HD 73256 b
| Discovery | |
|---|---|
| Discovered by | Udry et al. |
| Discovery site | La Silla Observatory, Chile |
| Discovery date | 2003 |
| Doppler spectroscopy (CORALIE) | |
| Orbital characteristics | |
| Apastron | 0.038 AU (5,700,000 km) |
| Periastron | 0.036 AU (5,400,000 km) |
| 0.037 AU (5,500,000 km) | |
| Eccentricity | 0.029±0.02 |
| 2.54858±0.00016 d | |
Average orbital speed | 160 |
| 2452500.18±0.28 | |
| 337±46 | |
| Semi-amplitude | 269±8 |
| Star | HD 73256 |
HD 73256 b is a 1.87 MJ hot Jupiter orbiting at 0.037 AU taking 2.55 days to orbit around HD 73256.[1]
Assuming the planet is perfectly grey with no greenhouse or tidal effects, and a Bond albedo of 0.1, the temperature would be about 1300 K. This is close to 51 Pegasi b; between the predicted temperatures of HD 189733 b and HD 209458 b (1180-1392K), before they were measured. It is a candidate for "near-infrared characterisation with the VLTI Spectro-Imager".[2]
In 2018, K. Ment and colleagues attempted to confirm the existence of this planet using Keck/HIRES data, but were unable to do so despite a likelihood of success. Thus the existence of this object is disputed.[3]
See also[]
References[]
- ^ Udry, S.; et al. (2003). "The CORALIE survey for southern extra-solar planets X. A Hot Jupiter orbiting HD 73256". Astronomy and Astrophysics. 407 (2): 679–684. arXiv:astro-ph/0304248. Bibcode:2003A&A...407..679U. doi:10.1051/0004-6361:20030815.
- ^ Renard, Stéphanie; Absil, Olivier; Berger, Jean-Philippe; Bonfils, Xavier; Forveille, Thierry; Malbet, Fabien (2008). "Prospects for near-infrared characterisation of hot Jupiters with the VLTI Spectro-Imager (VSI)" (PDF). Proceedings of SPIE. Optical and Infrared Interferometry. 7013: 70132Z–70132Z–10. arXiv:0807.3014. Bibcode:2008SPIE.7013E..2ZR. doi:10.1117/12.790494. S2CID 119268109.
- ^ Ment, Kristo; et al. (November 2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5): 45. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5. S2CID 119243619. 213.
External links[]
- "HD 73256". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-10-31.
Coordinates: 
08h 36m 23.0155s, −30° 02′ 15.456″
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