ExoAtmospheres
IAC community database for exoplanet atmospheric observations
HR 8799 c
| Planet status | Confirmed |
|---|---|
| Planet type | Jupiter |
| Period | 82145 d |
| Mass | 8.3 MJ 2637.74 M⊕ |
| Radius | 1.3 RJ 14.56 R⊕ |
| Semi major axis | 42.9 AU |
| Star name | HR 8799 |
| Star distance | 39.4 pc |
| Star teff | N/A |
| Star radius | 1.5 R☉ |
| Temperature (calculated) | N/A |
| V | 5.96 mag |
| J | 5.383 mag |
| K | 5.24 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
CO2: Detection
|
JWST-NIRCam | JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO$_2$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres2025, William O. Balmer, Jens Kammerer et al. |
|
Molecular ratios: C/O, etc...: Detection Cloudy: Detection HCN: Detection CH4: Detection
|
G-B:Low resolution IR | Four-of-a-kind? Comprehensive atmospheric characterisation of the HR 8799 planets with VLTI/GRAVITY2024, E. Nasedkin, P. Mollière et al. |
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C: Upper limit
|
G-B:Low resolution IR | Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-Resolution Data2022, Ji Wang, Jason J. Wang et al. |
Retrieval of [C/H], [O/H], and C/O ratios |
CH4: Detection H2O: Detection
|
G-B:Low resolution IR | Deep exploration of the planets HR 8799 b, c, and d with moderate resolution spectroscopy2021, Jean-Baptiste Ruffio, Quinn M. Konopacky et al. |
|
CO: Detection
|
G-B:Low resolution IR | Deep exploration of the planets HR 8799 b, c, and d with moderate resolution spectroscopy2021, Jean-Baptiste Ruffio, Quinn M. Konopacky et al. |
|
CH4: No detection CO2: No detection H2C2: Upper limit NH3: Detection
|
G-B: High resolution IR | Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy2013, B. R. Oppenheimer, C. Baranec et al. |