S / 2012 (523624) 1
| S / 2012 (523624) 1 | |
|---|---|
| Central body | (523624) 2008 CT 190 |
| Properties of the orbit | |
| Major semi-axis | 1300 ± 200 km |
| Periapsis | unknown |
| Apoapsis | unknown |
| Orbital time | 3.3 d |
| Physical Properties | |
| Albedo | 0.08-0.10 |
| Medium diameter | approx. 220 km |
| discovery | |
| Explorer |
Keith S. Noll |
| Date of discovery | May 18, 2012 |
S / 2012 (523624) 1 is a moon of the trans-Neptunian object 2008 CT 190 , which is classified as a resonant Kuiper belt object (3: 7 resonance) or as a scattered disk object (SDO). The companion is about four fifths the diameter of the mother planetoid. Since both celestial bodies revolve around the common center of gravity , the system can also be understood as a double asteroid system.
discovery
S / 2012 (523624) 1 was discovered on May 18, 2012 by a team of astronomers consisting of Keith Noll ( GSFC ), Will Grundy ( Lowell Observatory ) and Susan Benecchi (core) ( PSI ) through observations from 2008 CT 190 with the Wide Field Camera 3 of the Hubble Space Telescope discovered. The three images showed a partially resolved double asteroid system , the companion being found at a distance of 0.053 ± 0.008 arc seconds from the 2008 CT 190 with a difference in apparent brightness of 0.4 ± 0.3 m . The discovery was announced on April 29, 2018, the moon was given the provisional designation S / 2012 (523624) 1 . (As of March 24, 2019)
Track properties
S / 2012 (523624) 1 orbits the common barycentre at an average distance of 1300 km to the planetoid (9.63 2008 CT 190 - or 11.82 S / 2012 (523624) 1 radii) and takes 3 days and 7 hours 12 minutes, which corresponds to 42,463.8 orbits in a 2008 CT 190 year. The orbital eccentricity and inclination are currently unknown. The two components appear to orbit each other along an axis roughly east-west.
size
The diameter of S / 2012 (523624) 1 is currently estimated at 220 km, based on an estimated reflectivity of 9%, analogous to the parent planetoid. Based on this diameter, the total surface area is around 152,000 km 2 . The discovery of the moon influenced the determination of the size of the mother planetoid, which according to current estimates is 270 km in size. So S / 2012 (523624) 1 should have 81.5% of the diameter of 2008 CT 190 . The mass of the system has not yet been calculated.
| year | Dimensions km | source |
|---|---|---|
| 2013 | 220.0 | Johnston |
| The most precise determination is marked in bold . | ||
See also
- List of trans-Neptunian objects
- List of moons from asteroids
- List of asteroids
- List of moons of planets and dwarf planets
Individual evidence
- ↑ a b IAU : CBET 4513: 20180429: 2008 CT190 . Central Bureau for Astronomical Telegrams. April 29, 2018. Retrieved March 24, 2019.
- ↑ a b c Wm. R. Johnston: Asteroids with Satellites - (523624) 2008 CT190 . Johnston's Archives. September 30, 2018. Retrieved March 24, 2019.
- ^ Marc W. Buie : Orbit Fit and Astrometric record for 523624 . SwRI (Space Science Department). Retrieved March 24, 2019.