247 Eukrate
Discovery | |
---|---|
Discovered by | Robert Luther |
Discovery date | 14 March 1885 |
Designations | |
MPC designation | (247) Eukrate |
Pronunciation | /juːˈkreɪtiː/[1] |
A901 TB, 1947 TA, 1960 TC | |
Minor planet category | Main belt |
Orbital characteristics[2] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 131.09 yr (47880 d) |
Aphelion | 3.4086 AU (509.92 Gm) |
Perihelion | 2.0778 AU (310.83 Gm) |
2.7432 AU (410.38 Gm) | |
Eccentricity | 0.24257 |
4.54 yr (1659.5 d) | |
Average orbital speed | 18.0 km/s |
75.9892° | |
0° 13m 0.948s / day | |
Inclination | 24.991° |
0.16410° | |
54.969° | |
Physical characteristics | |
Dimensions | 134.43±2.5 km |
Synodic rotation period | 12.093 h (0.5039 d) |
0.0595±0.002 | |
CP | |
Absolute magnitude (H) | 8.04 |
Eukrate (minor planet designation: 247 Eukrate) is a rather large main-belt asteroid. It is dark and probably a primitive carbonaceous body. The asteroid was discovered by Robert Luther on March 14, 1885, in Düsseldorf. It was named after Eucrate, a Nereid in Greek mythology.
In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.18 AU. The resulting data yielded an effective diameter of 134 ± 15 km.[3]
There have been 9 occultation observations of this asteroid since 2004.[4] The latest of 2018 May 12 was a 5 chord observation that allows, using Occult (Software), the scaling of the DAMIT model 1207, to yield a Mean volume-equivalent diameter of 137.5km and a Mean surface-equivalent diameter of 140.0 km.
References[]
- ^ A rare case of a long alpha in Greek, eukrātē,[1] so the stress is on the 'a'. Cf. "eucratic". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ "247 Eukrate". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ^ Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003" (PDF), Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 14 April 2015.
- ^ "PDS Asteroid/Dust Subnode". sbn.psi.edu. Archived from the original on 25 April 2018. Retrieved 19 May 2018.
External links[]
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- 247 Eukrate at AstDyS-2, Asteroids—Dynamic Site
- 247 Eukrate at the JPL Small-Body Database
- Minor planet object articles (numbered)
- Background asteroids
- Discoveries by Robert Luther
- Minor planets named from Greek mythology
- Named minor planets
- CP-type asteroids (Tholen)
- Xc-type asteroids (SMASS)
- Astronomical objects discovered in 1885
- C-type main-belt-asteroid stubs