1RXS J160929.1-210524 b
1RXS J160929.1-210524 b is a hot Jupiter orbiting the K7 V star 1RXS J160929.1-210524 in the constellation Scorpius. It lies about 454 light-years from Earth and was discovered in 2008 using the imaging method.
Is 1RXS J160929.1-210524 b in the Habitable Zone?
1RXS J160929.1-210524 b orbits beyond the outer edge of the habitable zone of 1RXS J160929.1-210524. At that distance, any surface water would almost certainly be frozen.
Habitable zone of 1RXS J160929.1-210524: 0.529–1.335 AU (conservative: 0.670–1.266 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on 1RXS J160929.1-210524 b
The equilibrium temperature of 1RXS J160929.1-210524 b is about 1,700 K (1,427 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
1RXS J160929.1-210524 b orbits at an average distance of 330.000 AU.
How Was 1RXS J160929.1-210524 b Discovered?
1RXS J160929.1-210524 b was discovered in 2008 using the imaging method, with observations from Gemini Observatory.
Direct imaging captures actual pictures of a planet by blocking out the overwhelming glare of its host star. It works best for young, hot, massive planets on wide orbits.
How Far Away Is 1RXS J160929.1-210524 b?
1RXS J160929.1-210524 b is 453.8 light-years (139.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1573. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,986,880 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. 1RXS J160929.1-210524 b scores 0.05, ranking #5,285 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: 1RXS J160929.1-210524
1RXS J160929.1-210524
- Spectral type
- K7 V
- Surface temperature
- 4,060 K (Sun: 5,772 K)
- Mass
- 0.85 M☉
- Luminosity
- 0.4266 L☉
- Age
- 0.0 billion years (Sun: 4.6)
Planetary System
1RXS J160929.1-210524 b is the only planet known to orbit 1RXS J160929.1-210524 so far.
1RXS J160929.1-210524 b — Complete Data
| Mass | 3,000.00 Earth masses (8.000 Jupiter masses) |
|---|---|
| Orbital distance | 330.000 AU |
| Equilibrium temperature | 1,700 K (1,427 °C) |
| Earth Similarity Index | 0.05 |
| Distance from Earth | 453.8 light-years (139.1 parsecs) |
| Constellation | Scorpius |
| Discovery method | Imaging |
| Discovery facility | Gemini Observatory |
| Discovery year | 2008 |
Data: NASA Exoplanet Archive, last updated 2015-04-01. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About 1RXS J160929.1-210524 b
Is 1RXS J160929.1-210524 b habitable?
No — 1RXS J160929.1-210524 b orbits outside the habitable zone of 1RXS J160929.1-210524 and is likely too cold for liquid water on its surface.
How far away is 1RXS J160929.1-210524 b?
1RXS J160929.1-210524 b is about 454 light-years from Earth in the constellation Scorpius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,986,880 years to get there.
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