| Discovery[1] | |
|---|---|
| Discovered by | C. S. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 12 October 1988 |
| Designations | |
| (4947) Ninkasi | |
| Pronunciation | /nɪŋˈkɑːsi/ |
Named after | Ninkasi |
| 1988 TJ1 | |
| NEOAmor | |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 13659 days (37.40 yr) |
| Aphelion | 1.600761485818500 AU (239.47050977701 Gm) |
| Perihelion | 1.13928481550582 AU (170.43458252051 Gm) |
| 1.370023150662 AU (204.9525461487 Gm) | |
| Eccentricity | 0.1684192964511710 |
| 1.60yr (585.72d) | |
| 337.8470256565600° | |
| 0° 36m 52.66s / day | |
| Inclination | 15.65150318051197° |
| 215.4605646418820° | |
| 192.858019947831° | |
| Earth MOID | 0.148912 AU (22.2769 Gm) |
| Physical characteristics | |
| Dimensions | 520 meters(est. at0.20)[3] |
| Sq[2] | |
| 18.0[2] | |
4947 Ninkasi, provisional designation1988 TJ1, is a sub-kilometerasteroid, classified asnear-Earth object of theAmor group, approximately 520 meters in diameter. It was discovered on 12 October 1988, by American astronomerCarolyn Shoemaker atPalomar Observatory in California.
It was named afterNinkasi, the Sumerian goddess of wine and beer, who helped the godLugalbanda rescue the tablets of fate from the demonZu.[4]
With anabsolute magnitude of 18.0,[2] the asteroid is about 670–1500 meters in diameter.[3] On 2031-Apr-20 the asteroid will pass 0.02917 AU (4,364,000 km; 2,712,000 mi) from Mars.[2]
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