SCR 1845−6357

SCR 1845-6357

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Pavo
Right ascension	18h 45m 02.6s
Declination	-63° 57' 48"
Apparent magnitude (V)	+17.39
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 12.5 light-years away in the constellation Pavo. 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 AU from the primary, has a mass between 9 and 65 times the mass of Jupiter, and an estimated effective temperature of 850K.

See also

• OTS 44
• Cha 110913-773444
• List of nearest stars

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 Brown Dwarf Very Close to the Sun: A Methane-rich Brown Dwarf Companion to the Low-Mass Star SCR 1845-6357", Astrophysical Journal Letters.

External links

• New Objects within 20 light-years at SolStation.
• VLT Finds Very Cool Brown Dwarf In The Neighborhood (SkyNightly) Mar 22, 2006