LSR 1610−0040
| LSR 1610−0040 | |
|---|---|
|
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|
| Constellation | Snake |
| Right ascension | 16 h 10 m 29.0 s |
| declination | −0 ° 40 ′ 53.0 ″ |
| Brightness (V-band) | (19.10 ± 0.02) mag |
| B − V color index | 3.26 ± 0.14 |
| Astrometry | |
| Radial velocity | approx. −100 km / s |
| parallax | (31.02 ± 0.26) mas |
| distance | approx. 105 ly (approx. 32 pc ) |
| Proper movement : | |
| Relative self-movement | 1447 mas / a |
| Position angle | 213 ° |
| Catalog entries | |
| 2MASS J16102900-0040530 • USNO-B1.0 0893-00262897 | |
LSR 1610−0040 is an astronomical object in the constellation Snake north of the ecliptic , which has an unusual spectrum and a high B − V color index of approx. 3.3.
It is an astrometric double system with an orbital period of 1.66 ± 0.01 years, whereby it is assumed that it consists of a cool star and a brown dwarf . The photocentric orbit has a major semi-axis of about 9 mas (about 0.3 AU) and an eccentricity of about 0.4.
Individual evidence
- S. Lépine, RM Rich, MM Shara: LSR 1610-0040: The First Early-Type L Subdwarf. In: The Astrophysical Journal . Vol. 591, No. 1, pp. L49-L52 (2003), bibcode : 2003ApJ ... 591L..49L
- MC Cushing, WD Vacca: The Schizophrenic Spectrum of LSR 1610-0040: A Peculiar M Dwarf / Subdwarf. In: The Astronomical Journal. Vol. 131, No. 3, pp. 1797ff. (2006), bibcode : 2006AJ .... 131.1797C
- Dahn et al .: Trigonometric Parallaxes for Two Late-Type Subdwarfs: LSR 1425 + 71 (sdM8.0) and the Binary LSR 1610-00 (sd? M6pec). In: The Astrophysical Journal. Vol. 686, No. 1, pp. 548ff. (2008), bibcode : 2008ApJ ... 686..548D