HD 45350
| Epoch 2000 | |
|---|---|
| Constellation | Auriga |
| Right Ascension | 6h 28m 45.71s |
| Declination | +38° 57' 46.67" |
| Distance | 160.0 ly (48.95 pc) |
| Spectral Type | G5IV |
| Apparent Magnitude | 7.88 |
| Other Designations | BD+39°1637, HIP 30860 |
HD 45350 is an 8th magnitude star in the constellation of Auriga. It is a yellow subgiant (spectral type G5 IV), a Sun-like star that is finishing hydrogen fusion in its core. Although slightly cooler, it is brighter, although not much considering its subgiant status. However, the star is very old and will soon start to expand becoming finally a red giant.
The star is visible only with binoculars or better equipment.
In 2005 discovery of an extrasolar planet orbiting the star was announced by the California and Carnegie Planet Search Team.
HD 45350 b
| Orbital elements | |
|---|---|
| Semi-major axis (a) | 1.77 AU |
| Eccentricity (e) | 0.78 ± 0.09 |
| Orbital period (P) | 2 y 160.26 ± 37.24 d |
| Inclination (i) | ?° |
| Longitude of periastron (ϖ) | 324.1 ± 7.5° |
| Time of periastron (τ) | 2,451,846.48 ± 24.42 JD |
| Physical characteristics | |
| Mass | >0.98 MJ |
| Radius | ? RJ |
| Density | ? kg/m³ |
| Temperature | ? K |
| Discovery | |
| Discoverers | Marcy, Butler, Vogt et al. |
| Discovery date | 2005 |
The planet, designated as HD 45350 b, has about the same mass as Jupiter. The mean distance of the planet from the star is more than distance between Mars and Sun, but the eccentricity of the orbit is nothing short of remarkable; at periapsis the planet is as close the star as Mercury is from the Sun, but at apoapsis it is 8 times further. No doubt seasons on the planet would be extreme.