Polarimetric Observations of NEAs at RTT150. First results
Third Gaia-FUN-SSO Workshop, Paris, France, 24 - 26 October 2014, vol.107, pp.107, (Full Text)
- Publication Type: Conference Paper / Full Text
- Volume: 107
- City: Paris
- Country: France
- Page Numbers: pp.107
- Open Archive Collection: AVESIS Open Access Collection
- Akdeniz University Affiliated: Yes
Abstract
We present results of polarimetric and photometric observations of three faint NEAs with high proper motion in period of theirs close approaches: 276049, 333578 and 163132 performed at 1.5m Russian-Turkish telescope RTT150 in the end of August 2014. Due to that sources were observed at large phase angles from 40 to 100 degrees for different asteroids the measured linear polarization degree makes it possible to differentiate the taxonomy classes of observed sources even using single shot. The visual magnitudes and proper motions of asteroids are 16m-17m and 3″-10″/min. Assuming that the mean inverse angle is 20 degree we estimated slope parameter h and from well-known relation the albedo was calculated and together with present photometry we estimated the diameters of asteroids. Calculated albedos are 0.50±0.19 (E-type), 0.043±0.005 (C-type), 0.250±0.023 (S-type) and diameters are 0.306±0.08 km, 3.106±0.29 km, 0.221±0.03 km, respectively. The applications of new polarimetric device at RTT150 to the GAIA-FUN-SSO are discussed.