| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | 42 Draconis | |
| Constellation | Draco | |
| Right ascension | (α) | 18h 25m 59.14s[1] |
| Declination | (δ) | +65° 33′ 48.5″[1] |
| Apparent magnitude | (mV) | 4.833 |
| Distance | 315 ± 6[1] ly (97 ± 2[1] pc) | |
| Spectral type | K1.5III | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.19 ± 0.01 AU |
| Periastron | (q) | 0.74 AU |
| Apastron | (Q) | 1.64 AU |
| Eccentricity | (e) | 0.38 ± 0.06 |
| Orbital period | (P) | 479.1 ± 6.2 d (1.312 ± 0.017 y) |
| Argument of periastron |
(ω) | 218.7 ± 10.6° |
| Time of periastron | (T0) | 2452757.4 ± 3.7 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 3.88 ± 0.85 MJ |
| Discovery information | ||
| Discovery date | March 20, 2009 | |
| Discoverer(s) | Doellinger et al. | |
| Discovery method | radial velocity | |
| Discovery site | TLS | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
42 Draconis b (sometimes abbreviated 42 Dra b) is an extrasolar planet located approximately 315 light years away in the constellation of Draco, orbiting the 5th magnitude K-type giant star 42 Draconis. It takes 479 days to orbit the star in a 38% eccentricity.[2] This planet was discovered by radial velocity method on March 20, 2009, which was the first day of spring.
See also[]
References[]
- ↑ 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664. Vizier catalog entry
- ↑ (2009). Planetary companion candidates around the K giant stars 42 Draconis and HD 139 357. Astronomy and Astrophysics 499 (3): 935–942.
- Jean Schneider (2011). Notes for Planet 42 Dra b. Extrasolar Planets Encyclopaedia. Retrieved 3 October 2011.
Coordinates: Sky map 18h 25m 59.1381s, +65° 33′ 48.530″
| File:Iota-draconis-b.jpg | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |
