1220 Crocus
| File:001220-asteroid shape model (1220) Crocus.png Shape model of Crocus from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 11 February 1932 |
| Designations | |
| (1220) Crocus | |
| Pronunciation | /ˈkroʊkəs/[2] |
Named after | Crocus[3] |
| 1932 CU · 1955 PC | |
| main-belt · Eos[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.31 yr (31,161 days) |
| Aphelion | 3.2243 AU |
| Perihelion | 2.7807 AU |
| 3.0025 AU | |
| Eccentricity | 0.0739 |
| 5.20 yr (1,900 days) | |
| 204.16° | |
| 0° 11m 21.84s / day | |
| Inclination | 11.365° |
| 113.34° | |
| 333.41° | |
| Physical characteristics | |
| Dimensions | 17.866±0.175[5] |
| 491.4±0.1[6] | |
| 0.114±0.020[5] | |
| S[4] | |
| 11.72[1] | |
_Crocus.png){kind=link}
1220 Crocus, provisionally designated 1932 CU, is a stony Eoan asteroid and slow rotator from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 11 February 1932, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[7]
Orbit and classification
[edit | edit source]Crocus is a member of the Eos family, a collisional population of mostly stony composition. It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 2 months (1,900 days). Its orbit has an eccentricity of 0.07 and an inclination of 11° with respect to the ecliptic.[1] A
Physical characteristics
[edit | edit source]The asteroid has been characterized as a stony S-type asteroid.[4]
In December 2014, a rotational lightcurve of Crocus was obtained from photometric observations by an international collaboration of several astronomers from Europe and the United States. Lightcurve analysis gave a long rotation period of 491 hours with a brightness variation of 1.00 magnitude (U=3).[6]
Naming
[edit | edit source]This minor planet was later named after the genus of flowering plants, Crocus, in the iris family.[3]
References
[edit | edit source]- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (Subscription or participating institution membership required.)
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1220 Crocus at AstDyS-2, Asteroids—Dynamic Site
- 1220 Crocus at the JPL Small-Body DatabaseLua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
Lua error in Module:Authority_control at line 153: attempt to index field 'wikibase' (a nil value).