ExoAtmospheres
IAC community database for exoplanet atmospheric observations
51 Peg b
| Planet status | Confirmed |
|---|---|
| Planet type | Hot Jupiter |
| Period | 4.2308 d |
| Mass | 0.47 MJ 149.366 M⊕ |
| Radius | 1.9 RJ 21.28 R⊕ |
| Semi major axis | 0.052 AU |
| Star name | 51 Peg |
| Star distance | 15.4614 pc |
| Star teff | 5758 K |
| Star radius | 1.176 R☉ |
| Temperature (calculated) | 1320 K |
| V | 5.49 mag |
| J | 4.66 mag |
| K | 3.91 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
|
G-B: High resolution visible | The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy2021, Scandariato, G., Borsa, F. et al. |
Upper limit on the albedo |
CO: Detection H2O: Detection
|
G-B: High resolution IR | Planet and star synergy at high-spectral resolution. A rationale for the characterization of exoplanet atmospheres. I. The infrared2019, Chiavassa, A.Brogi, M. |
Confirmation of previous tentative detection by Brogi et al. (2013) |
H2O: Detection
|
G-B: High resolution IR | Discovery of Water at High Spectral Resolution in the Atmosphere of 51 Peg b2017, Birkby, J. L., de Kok, R. J. et al. |
|
Albedo: 0.5 |
G-B: High resolution visible | Evidence for a spectroscopic direct detection of reflected light from <ASTROBJ>51 Pegasi b</ASTROBJ>2015, Martins, J. H. C., Santos, N. C. et al. |
Albedo value not well constrained |
CO: Detection H2O: Detection
|
G-B: High resolution IR | Detection of molecular absorption in the dayside of exoplanet 51 Pegasi b?2013, M. Brogi, I. A. G. Snellen et al. |
Dayside observations with CRIRES |
Phase curve: Yes |
Spitzer | Hot nights on extrasolar planets: mid-infrared phase variations of hot Jupiters2007, Cowan, N. B., Agol, E. et al. |
Multi-epoch phase measurements yield an upper limit on 8 micron phase variations. |
CO: Upper limit H2O: Detection
|
G-B: High resolution IR | Astro-ph arXiv:2605.23582 |