 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters, 1878 |
| Discovery date | 1 March 1878 |
| Designations | |
| (185) Eunike | |
| Pronunciation | /juːˈnaɪkiː/[1] |
Named after | ΕὐνίκηEynīkē |
| A878 EA | |
| Main belt | |
| Adjectives | Eunikean/juːnɪˈkiːən/ |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 131.77 yr (48128 d) |
| Aphelion | 3.0924 AU (462.62 Gm) |
| Perihelion | 2.3843 AU (356.69 Gm) |
| 2.7383 AU (409.64 Gm) | |
| Eccentricity | 0.12930 |
| 4.53yr (1655.1d) | |
| 327.48° | |
| 0° 13m 3.036s / day | |
| Inclination | 23.238° |
| 153.84° | |
| 224.01° | |
| Earth MOID | 1.41759 AU (212.068 Gm) |
| Jupiter MOID | 2.40697 AU (360.078 Gm) |
| TJupiter | 3.222 |
| Physical characteristics | |
| Dimensions | 157.51±2.6 km[2] 160.61 ± 5.00 km[3] |
| Mass | (3.56 ± 2.61) × 1018 kg[3] |
Meandensity | 1.64 ± 1.21 g/cm3[3] |
| 21.797 h (0.9082 d)[2] 21.812 ± 0.001 hours[4] | |
| 0.0638±0.002 | |
| C | |
| 7.62,[2] 7.45 ± 0.01[4] | |
185 Eunike is a dark and very largemain-beltasteroid, with an approximate diameter of 157 kilometres. It has a primitivecarbonaceous composition.
It was discovered byC. H. F. Peters on March 1, 1878, inClinton, New York and named after Eunike, aNereid inGreek mythology whose name means 'happy victory'. The name was chosen to celebrate theTreaty of San Stefano (1878).
Based uponphotometric observations made between 2010 and 2014, this asteroid has a rotation period of 21.812 ± 0.001 hours and a brightnessvariation of 0.08 ± 0.01 inmagnitude. Atopposition, theabsolute magnitude was measured at 7.45 ± 0.01. It displays a hemispheric albedo dichotomy similar to that on4 Vesta.[4]
As of 17 September 2020, there have been thirteen observedoccultations of stars by Eunike.
_mathilde.jpg) | This article about a C-type asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
