HD 231701
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Sagitta |
| Right ascension | 19h 32m 04s |
| Declination | +16º 28' 27″ |
| Apparent magnitude (V) | +8.97 |
| Distance | 353.6 ly (108.4 pc) |
| Spectral type | F8V |
| Other designations | |
|
HIP 96078, SAO 104946
|
|
HD 231701 is a star in the constellation Sagitta.
It is the 9th magnitude, meaning the star is not visible to naked-eye, but powerful binoculars or small telescope is needed to view the star.
It is the F-type main-sequence star, a type of hydrogen-fusing star that is hotter, more massive, and brighter than our Sun.
A single planetary system is located 353.6 ly from Earth.
[edit] HD 231701 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.55 AU |
| Eccentricity | (e) | 0.19±0.05 |
| Orbital period | (P) | 142±2.8 d |
| Angular distance | (θ) | 5.074 mas |
| Longitude of periastron |
(ω) | 117±24° |
| Time of periastron | (T0) | 2,453,203±3.2 JD |
| Semi-amplitude | (K) | 38.3 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.08 MJ |
| Discovery information | ||
| Discovery date | April 10, 2007 | |
| Discoverer(s) | Fischer et al. | |
| Detection method | Radial velocity | |
| Discovery site | California, USA | |
| Discovery status | Published | |
HD 231701 b is a planet from the star HD 231701. Based on its high mass of 1.08 MJ, the planet is probably a gas giant, meaning the planet has no solid surface and have composition similar to solar system's outer planets.
The planet orbits more than half the distance of Earth-Sun distance and takes two-fifths year to orbit around HD 231701 in somewhat eccentrically.
[edit] References
- Fischer et al. (10 Apr 2007). "Five Intermediate-Period Planets from the N2K Sample" 1: 13.
[edit] External links
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