Difference between revisions of "Gamma Leporis"
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{{Starbox | {{Starbox | ||
| − | |name=Gamma Leporis A | + | |name=Gamma Leporis A |
|image= | |image= | ||
|image_size= | |image_size= | ||
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|right ascension=05h 44m 27.8s | |right ascension=05h 44m 27.8s | ||
|declination=-22° 26' 54" | |declination=-22° 26' 54" | ||
| − | |spectral type=F6-7 | + | |spectral type=F6-7 V |
|distance=29.2 ± 0.2 ly | |distance=29.2 ± 0.2 ly | ||
| − | |other designations=13 | + | |other designations=Gam Lep, 13 Lep, HR 1983, Gl 216 A, Hip 27072, HD 38393, BD-22 1211, CD-22 2438, CP(D)-22 886, SAO 170759, FK5 217, LTT 2364, ADS 4334. |
}} | }} | ||
| − | '''Gamma Leporis''' is a binary system made up of a F-type star with a K-type companion, both in the main sequence. There may be a third star in this system. | + | {{Starbox |
| + | |name=Gamma Leporis B | ||
| + | |image= | ||
| + | |image_size= | ||
| + | |caption= | ||
| + | |constellation=Lepus | ||
| + | |right ascension=05h 44m 27.8s | ||
| + | |declination=-22° 26' 54" | ||
| + | |spectral type=K2 V | ||
| + | |distance=29.2 ± 0.2 ly | ||
| + | |other designations=HR 1982, HD 38392, BD-22 1210, SAO 170757, Gl 216 B. | ||
| + | }} | ||
| + | |||
| + | '''Gamma Leporis''' is a binary system made up of a F-type star with a K-type companion, both in the main sequence. Stars A and B have an observed seperation of approximately 864 AU<ref>(96.3" at a HIPPARCOS parallax of 0.11149 +/- 0.00060")</ref>. There may be a third star in this system. | ||
| + | |||
| + | ==Gamma Leporis A== | ||
| + | |||
| + | This star is a main-sequence white-yellow dwarf star of spectral and luminosity type F6-7 V. '''Gamma Leporis A''' has about 1.2 times Sol's mass, about 1.3 times its diameter, and about 2.6 times of its luminosity. It appears to be less enriched than Sol in elements heavier than hydrogen ("metals") with about 72-89 percent of Sol's abundance of iron<ref>(Cayrel de Strobel et al, 1991, page 12)</ref>. The star may be about 2.7 billion years old<ref>(Edvardsson et al, 1993, page 22)</ref>. | ||
| + | |||
| + | A 2.5-year search analyzing radial velocities failed to find a large Jupiter or brown dwarf within 10 AUs of '''Gamma Leporis A'''<ref>(Murdoch et al, 1993)</ref>. The distance from '''Gamma Leporis A''' where an [[Earth]]-type planet would be "comfortable" with liquid water may be centered around 1.6 AU -- just outside the orbital distance of [[Mars]] in the Solar System with an orbital period of 1.85 [[Earth]] Years | ||
| + | |||
| + | ==Gamma Leporis B== | ||
| + | |||
| + | '''Gamma Leporis B''' appears to be a main-sequence orange-red star of spectral and luminosity type K2 V. The star has about 63 percent of Sol's mass, as much as the same diameter, and about 25 percent of its luminosity. | ||
| + | |||
| + | An [[Earth]]-type planet around Star B may be centered around 0.50 AUs -- which between the orbital distances or [[Mercury]] and [[Venus]] -- with an orbital period of about 161 days, or almost half an [[Earth]] year. | ||
| + | |||
| + | ''(Some data from [http://www.solstation.com/ SolStation.com])'' | ||
| + | |||
| + | ==Notes== | ||
| + | <references /> | ||
{{interstellar}} | {{interstellar}} | ||
Revision as of 03:23, 12 May 2010
| Gamma Leporis A | |
| Stellar characteristics | |
|---|---|
| Constellation | Lepus |
| Right ascension (Epoch J2000) | 05h 44m 27.8s |
| Declination (Epoch J2000) | -22° 26' 54" |
| Spectral type | F6-7 V |
| Distance from Sol | 29.2 ± 0.2 ly |
| Other designations | Gam Lep, 13 Lep, HR 1983, Gl 216 A, Hip 27072, HD 38393, BD-22 1211, CD-22 2438, CP(D)-22 886, SAO 170759, FK5 217, LTT 2364, ADS 4334. |
| Gamma Leporis B | |
| Stellar characteristics | |
|---|---|
| Constellation | Lepus |
| Right ascension (Epoch J2000) | 05h 44m 27.8s |
| Declination (Epoch J2000) | -22° 26' 54" |
| Spectral type | K2 V |
| Distance from Sol | 29.2 ± 0.2 ly |
| Other designations | HR 1982, HD 38392, BD-22 1210, SAO 170757, Gl 216 B. |
Gamma Leporis is a binary system made up of a F-type star with a K-type companion, both in the main sequence. Stars A and B have an observed seperation of approximately 864 AU[1]. There may be a third star in this system.
Gamma Leporis A
This star is a main-sequence white-yellow dwarf star of spectral and luminosity type F6-7 V. Gamma Leporis A has about 1.2 times Sol's mass, about 1.3 times its diameter, and about 2.6 times of its luminosity. It appears to be less enriched than Sol in elements heavier than hydrogen ("metals") with about 72-89 percent of Sol's abundance of iron[2]. The star may be about 2.7 billion years old[3].
A 2.5-year search analyzing radial velocities failed to find a large Jupiter or brown dwarf within 10 AUs of Gamma Leporis A[4]. The distance from Gamma Leporis A where an Earth-type planet would be "comfortable" with liquid water may be centered around 1.6 AU -- just outside the orbital distance of Mars in the Solar System with an orbital period of 1.85 Earth Years
Gamma Leporis B
Gamma Leporis B appears to be a main-sequence orange-red star of spectral and luminosity type K2 V. The star has about 63 percent of Sol's mass, as much as the same diameter, and about 25 percent of its luminosity.
An Earth-type planet around Star B may be centered around 0.50 AUs -- which between the orbital distances or Mercury and Venus -- with an orbital period of about 161 days, or almost half an Earth year.
(Some data from SolStation.com)
Notes
- ↑ (96.3" at a HIPPARCOS parallax of 0.11149 +/- 0.00060")
- ↑ (Cayrel de Strobel et al, 1991, page 12)
- ↑ (Edvardsson et al, 1993, page 22)
- ↑ (Murdoch et al, 1993)
