Astronomy:4947 Ninkasi
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| 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 | |
| Minor planet category | NEO Amor |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 13659 days (37.40 yr) |
| |{{{apsis}}}|helion}} | 1.600761485818500 astronomical unit|AU (239.47050977701 Gm) |
| |{{{apsis}}}|helion}} | 1.13928481550582 AU (170.43458252051 Gm) |
| 1.370023150662 AU (204.9525461487 Gm) | |
| Eccentricity | 0.1684192964511710 |
| Orbital period | 1.60 yr (585.72 d) |
| Mean anomaly | 337.8470256565600° |
| Mean motion | 0° 36m 52.66s / day |
| Inclination | 15.65150318051197° |
| Longitude of ascending node | 215.4605646418820° |
| 192.858019947831° | |
| Earth MOID | 0.148912 AU (22.2769 Gm) |
| Physical characteristics | |
| Dimensions | 520 meters (est. at 0.20)[3] |
| Sq [2] | |
| Absolute magnitude (H) | 18.0[2] |
4947 Ninkasi, provisional designation 1988 TJ1, is a sub-kilometer asteroid, classified as near-Earth object of the Amor group, approximately 520 meters in diameter. It was discovered on 12 October 1988, by American astronomer Carolyn Shoemaker at Palomar Observatory in California.
It was named after Ninkasi, the Sumerian goddess of wine and beer, who helped the god Lugalbanda rescue the tablets of fate from the demon Zu.[4]
With an absolute 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 astronomical unit|AU (4,364,000 km; 2,712,000 mi) from Mars.[2]
References
- ↑ "(4947) Ninkasi = 1988 TJ1". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=4947.
- ↑ 2.0 2.1 2.2 2.3 2.4 "JPL Small-Body Database Browser: 4947 Ninkasi (1988 TJ1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=4947;cad=1.
- ↑ 3.0 3.1 "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html.
- ↑ Dictionary of minor planet names, by Lutz D. Schmadel.
External links
- 4947 Ninkasi at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 4947 Ninkasi at ESA–space situational awareness
- 4947 Ninkasi at the JPL Small-Body Database
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