| Discovery | |
|---|---|
| Discovered by | First: Setiawan et al. New study: Atacama Large Millimeter Array |
| Discovery site | First:  GermanyNew study:  Chile |
| Discovery date | First: December 2007 (disproven) New study: September 2016 |
| Orbital characteristics | |
| 22 AU (3.3×109 km) | |
| Star | TW Hydrae |
| Physical characteristics | |
| ~4.25 R🜨 | |
| Mass | 23.72[1] ME |
| Temperature | ≥40 K (−233.2 °C; −387.7 °F) |
TW Hydrae b is a likely extrasolar planet orbiting the young T Tauri star TW Hydrae approximately 176 light-years (54 parsecs, or nearly 1.665×1016 km) away in the constellation of Hydra. It is likely a Neptune-like planet orbiting at a distance of nearly 22 AU from its star.[1]
- ^ a b Tsukagoshi, Takashi; Nomura, Hideko; Muto, Takayuki; Kawabe, Ryohei; Ishimoto, Daiki; Kanagawa, Kazuhiro D.; Okuzumi, Satoshi; Ida, Shigeru; Walsh, Catherine; Millar, Tom J. (2016). "A Gap with a Deficit of Large Grains in the protoplanetary disk around TW Hya". The Astrophysical Journal. 829 (2): L35. arXiv:1605.00289. Bibcode:2016ApJ...829L..35T. doi:10.3847/2041-8205/829/2/L35. S2CID 41738556.