HD 189733
20 00 43
+22 42 39
19.3
11.2
216
246
HD 189733 A
V452 Vulpeculae A
0.8
0.788
7.68
8.578
7.126
6.68
6.073
5.587
5.54
-0.03
K2V
HD 189733 A b
HD 189733 b
V452 Vulpeculae A b
Confirmed planets
1.138
1.138
2.21857312
0.03142
0.0041
85.51
2453629.3928
transit
13/08/18
2005
1099.7
The planet HD 189733 b is a transiting hot Jupiter on a 2 day orbit. Astronomers have observed the secondary eclipse with the Hubble Space Telescope. They found evidence for optically thick reflective clouds on the dayside hemisphere. According to the best-fit albedo values, the planet would appear deep blue at visible wavelengths.
HD189733
This illustration shows HD 189733b, a huge gas giant that orbits very close to its host star HD 189733. The planet's atmosphere is scorching with a temperature of over 1000 degrees Celsius, and it rains glass, sideways, in howling 7000 kilometre-per-hour winds.
At a distance of 63 light-years from us, this turbulent alien world is one of the nearest exoplanets to Earth that can be seen crossing the face of its star. By observing this planet before, during, and after it disappeared behind its host star during orbit, astronomers were able to deduce that HD 189733b is a deep, azure blue - reminiscent of Earth's colour as seen from space.
Credit: NASA, ESA, M. Kornmesser
Planets in binary systems, S-type
1
4980.0
HD 189733 B
V452 Vulpeculae B
M4
0.4
Vulpecula