SCR 1845-6357
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| Observation data Epoch J2000.0 |
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|---|---|
| Constellation | Corona Australis |
| Right ascension | 18h 45m 02.6s |
| Declination | -45° 01' 06" |
| Apparent magnitude (V) | +17.39 |
| Spectral Characteristics | |
| Spectral type | M8.5 |
| U-B color index | ? |
| B-V color index | ? |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | ? km/s |
| Proper motion (μ) | RA: 2,664 mas/yr Dec.: 76.6 mas/yr |
| Parallax (π) | 259.45 ± 1.11 mas |
| Distance | 12.57 ± 0.05 ly (3.85 ± 0.02 pc) |
| Absolute magnitude (MV) | 19.41 |
SCR 1845-6357 is a red dwarf star about 11 light-years away in the constellation Corona Australis. This star has a mass of about 7% of the Sun. However the measurements are still preliminary and are subject to change.
This star has been found to possess a brown dwarf companion, designated SCR 1845-6357 B. The companion, classified as a T-dwarf, orbits at a distance of 4.5 AUs from the primary, has a mass between 9 and 65 times the mass of Jupiter, and an estimated surface temperature of 750°C.
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[edit] See also
[edit] References
- Hambly, N.C., "et al", 2005, "The Solar Neighborhood. VIII. Discovery of New High Proper Motion Nearby Stars Using the SuperCOSMOS Sky Survey", The Astronomical Journal, Vol. 128
- Deacon, Niall R. et al, 2005, "The Solar Neighborhood. XI. The Trigonometric Parallax of SCR 1845-6357", The Astronomical Journal, Vol. 129.
- B.A. Biller et al, 2006, "Discovery of a Very Nearby Brown Dwarf to the Sun: A Methane Rich Brown Dwarf Companion to the Low Mass Star SCR 1845-6357", Astrophysical Journal Letters.
[edit] External links
- New Objects within 20 light-years at SolStation.
- VLT Finds Very Cool Brown Dwarf In The Neighborhood (SkyNightly) Mar 22, 2006
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