HD 75898
From Wikipedia, the free encyclopedia
| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Lynx |
| Right ascension | 08h 53m 50.8s |
| Declination | +33° 03' 24.5" |
| Apparent magnitude (V) | 8.04 |
| Distance | 262.82 ly (80.58 pc) |
| Spectral type | G0IV |
| Other designations | |
|
BD+33°1776, HIP 43674, SAO 61116
|
|
HD 75898 is an 8th magnitude star in the constellation Lynx. It is a yellow subgiant, although it is only 3.8 billion years old. The star is 28% more massive, 60% larger, and 3 times as luminous than our local star. It is a metal-rich star, meaning it has 186% the solar abundance of iron.
The star is 80.58 parsecs away. On January 11, 2007, the California and Carnegie Planet Search team found one planet orbiting HD 75898.
[edit] HD 75898 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.168 AU |
| Eccentricity | (e) | 0.10 |
| Orbital period | (P) | 407.26 d |
| Angular distance | (θ) | 14.495 mas |
| Longitude of periastron |
(ω) | 130±10° |
| Time of periastron | (T0) | 2,453,095.2 ±6.8 JD |
| Semi-amplitude | (K) | 49.35 m/s |
| Physical characteristics | ||
| Mass | (m) | >2.51 MJ |
| Discovery information | ||
| Discovery date | January 11, 2007 | |
| Discoverer(s) | Robinson et al. | |
| Detection method | Doppler spectroscopy | |
| Discovery status | Published | |
HD 75898 b is a giant planet orbiting the star HD 75898. The mass is two and a half times more than Jupiter, classifying as massive jovian. Since if the parent star is 3 times as luminous than the Sun, the planet puts in inner edge of the habitable zone with effective temperature of 312 K. The planet orbits 1.168 AU from the star, taking 1.1 year to orbit in relatively circular orbit, about the same eccentricity as HD 70642 b and Mu Arae c.
[edit] References
Sarah E. Robinson (1), Gregory Laughlin (1), Steven S. Vogt (1), Debra A. Fischer (2), R. Paul Butler (3), Geoffrey W. Marcy (4), Gregory W. Henry (5), Peter Driscoll (2,6), Genya Takeda (7), John A. Johnson (4) ((1) UCO/Lick Observatory, (2) San Francisco State University, (3) Carnegie DTM, (4) University of California, Berkeley, (5) Tennessee State University, (6) Johns Hopkins University, (7) Northwestern University) (6 Aug 2007). "Two Jovian-Mass Planets in Earthlike Orbits".
[edit] External links
 |
This star-related article is a stub. You can help Wikipedia by expanding it. |
