VB 10

from Wikipedia, the free encyclopedia
Star
VB 10 (Van Biesbroeck 10)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Eagle
Right ascension 19 h 16 m 58 s
declination + 05 ° 09 ′ 2 ″
Apparent brightness approx 17 mag
Typing
Spectral class M8 V
Astrometry
parallax (164.3 ± 3.5)  mas
distance (19.9 ± 0.4)  ly
(6.09 ± 0.13)  pc  
Proper movement 
Rec. Share: −614  mas / a
Dec. portion: −1,368  mas / a
Physical Properties
Other names
and catalog entries
Other names V1298 Aquilae • Gliese 752 B

VB 10 ( Van Biesbroeck 10 ) is an approximately 6  Parsecs (20  Lj ) of the Earth remote red dwarf in the constellation Adler .

Astrometric examinations

VB 10's position in the sky over a nine year period

In May 2009, astronomers Steven Pravdo and Stuart Shaklan of NASA's Jet Propulsion Laboratory announced the discovery of an exoplanet around VB 10 using astrometric methods . Later investigation of the radial velocity of VB 10 could not confirm the propagated exoplanet and rule out the existence of an object with the properties described by Pravdo and Shaklan. At the moment there is no reliable evidence of the existence of an exoplanet around VB 10. If there was a confirmation of the discovery, VB 10 b would be the first exoplanet that was discovered with the aid of astrometry .

For the supposed companion, designated VB 10 b , a mass of around 6.4  Jupiter masses and an orbital period of almost 272  days were assumed. The companion's orbit should have a major semiaxis of about 0.36  astronomical units and a strongly elliptical shape with an eccentricity of up to 0.98, the orbit should be about 97 degrees.

Individual evidence

  1. ↑ 2MASS All Sky Catalog of point sources (2003), bibcode : 2003yCat.2246 .... 0C
  2. ↑ Kirkpatrick et al .: A standard stellar spectral sequence in the red / near-infrared - Classes K5 to M9 ; in: Astrophysical Journal Supplement Series, Vol. 77, pp. 417ff. (1991), bibcode : 1991ApJS ... 77..417K
  3. ↑ a b Tinney, CG: CCD astrometry of southern very low-mass stars ; in: Monthly Notices of the Royal Astronomical Society, Vol. 281, Issue 2, pp. 644ff. (1996) bibcode : 1996MNRAS.281..644T
  4. ↑ LSPM-NORTH catalog (2005), bibcode : 2005AJ .... 129.1483L