Gliese 282
| Observation data Epoch J2000 Equinox 2000 |
|
|---|---|
| Constellation | Monoceros |
| Right ascension | 06h 10m 54.80387s[1] |
| Declination | 10° 19′ 04.9946″ |
| Apparent magnitude (V) | (7.30 + 9.01)[2] |
| Characteristics | |
| Spectral type | K2V[3] + K7V[4] + M1.5Ve[5] |
| Apparent magnitude (U) | 12.9 |
| Apparent magnitude (B) | 11.844 |
| Apparent magnitude (V) | 10.385 |
| Apparent magnitude (R) | 9.365 |
| Apparent magnitude (I) | 8.065 |
| Apparent magnitude (J) | 6.795 |
| Apparent magnitude (H) | 6.306 |
| Apparent magnitude (K) | 6.032 |
| Variable type | A: BY Dra[6] |
| Astrometry | |
| Radial velocity (Rv) | −18.15[7] km/s |
| Proper motion (μ) | RA: 69.90[1] mas/yr Dec.: -278.33[1] mas/yr |
| Parallax (π) | 91.65 ± 3.50[1] mas |
| Distance | 36 ± 1 ly (10.9 ± 0.4 pc) |
| Details | |
| Gl 228 A | |
| Surface gravity (log g) | 4.40[8] cgs |
| Temperature | 4,956[8] K |
| Metallicity [Fe/H] | −0.12[8] dex |
| Rotational velocity (v sin i) | 1.77[6] km/s |
| Age | 300−350[5] Myr |
| Gl 228 B | |
| Metallicity [Fe/H] | −0.25[9] dex |
| Age | 680−720[5] Myr |
| Other designations | |
| Gl 228 A: BD−03° 2001, SAO 134954 | |
| Gl 228 B: BD−03° 2002, SAO 134958 | |
| Gl 228 C: G 112-29, NLTT 18149 | |
Gliese 282 is a triple star system in the equatorial constellation of Monoceros. At a distance of 36 light years, this star has an apparent magnitude of 7.26 when viewed from Earth. It is not visible to the naked eye.
The Gl 282AB star system is composed of two K- type main-sequence stars. The primary component, Gliese 282A, is a BY Draconis type variable star with a stellar classification of K2V. It has an effective temperature of 4,956 K. The companion, Gliese 282B, is a smaller, class K5V star. As of 2003, the pair had an angular separation of 58.30 arc seconds along a position angle of 113°.[2] This is equivalent to a projected physical separation of 824 AU.[5]
There is a distant common proper motion companion (G 112-29) at an angular separation of 1.09°. At the estimated distance of Gl 282AB, this corresponds to a projected separation of 55,733 AU, making it one of the widest known physical companions. It is a red dwarf star with a stellar classification of M1.5Ve.[5]
References
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 5.0 5.1 5.2 5.3 5.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 8.0 8.1 8.2 Lua error in package.lua at line 80: module 'strict' not found.
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External links
- Lua error in package.lua at line 80: module 'strict' not found.
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