SCR 1845-6357

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**SCR 1845-6357 A**
Observation data Epoch J2000.0
Constellation (pronunciation)	Pavo
Right ascension	18^h 45^m 02.6^s
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 (R_v)	? 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 (M_V)	19.41
Details
Mass	0.07 M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	?
Age	? years
Other designations

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.

**SCR 1845-6357 B**
Observation data Epoch J2000.0
Constellation (pronunciation)	Pavo
Right ascension	18^h 45^m 02.6^s
Declination	-63° 57' 48"
Apparent magnitude (V)	+17.39
Characteristics
Spectral type	T
U-B color index	?
B-V color index	?
Variable type	?
Astrometry
Radial velocity (R_v)	? 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 (M_V)	19.41
Details
Mass	0.062 M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	?
Age	? years
Other designations

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.

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