Global Information247 Eukrate information
 3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | Robert Luther |
| Discovery date | 14 March 1885 |
| Designations | |
MPC designation | (247) Eukrate |
| Pronunciation | /juːˈkreɪtiː/[a] |
Named after | Eucrate |
Alternative designations | A885 EB, 1901 TB 1947 TA, 1960 TC |
Minor planet category | Main belt |
| Orbital characteristics[1] | |
| 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) |
Semi-major axis | 2.7432 AU (410.38 Gm) |
| Eccentricity | 0.24257 |
Orbital period (sidereal) | 4.54 yr (1659.5 d) |
Average orbital speed | 18.0 km/s |
Mean anomaly | 75.9892° |
Mean motion | 0° 13m 0.948s / day |
| Inclination | 24.991° |
Longitude of ascending node | 0.16410° |
Argument of perihelion | 54.969° |
| Physical characteristics | |
Mean diameter | 130.935±0.505 km[1] |
Surface area | 61580 km2[b] |
| Volume | 1.361×106 km3[c] |
| Mass | (1.99 ± 0.830/0.62)×1018 kg[2] |
Mean density | 1.693 ± 0.706/0.527 g/cm3[2][d] |
Synodic rotation period | 12.093 h (0.5039 d) |
Geometric albedo | 0.064±0.012[1] |
Spectral type | CP |
Absolute magnitude (H) | 8.20[1] |
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 137.5 km and a mean surface-equivalent diameter of 140.0 km.
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
- ^ a b c d "247 Eukrate". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ^ a b Cite error: The named reference
FiengaEtAl2020was invoked but never defined (see the help page). - ^ Cite error: The named reference
icarus186_1_126was invoked but never defined (see the help page). - ^ "PDS Asteroid/Dust Subnode". sbn.psi.edu. Archived from the original on 25 April 2018. Retrieved 19 May 2018.