4947 Ninkasi

4947 Ninkasi
Discovery[1]
Discovered byC. S. Shoemaker
Discovery sitePalomar Obs.
Discovery date12 October 1988
Designations
(4947) Ninkasi
Pronunciation/nɪŋˈkɑːsi/
Named after
Ninkasi
1988 TJ1
NEO Amor
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc13659 days (37.40 yr)
Aphelion1.600761485818500 AU (239.47050977701 Gm)
Perihelion1.13928481550582 AU (170.43458252051 Gm)
1.370023150662 AU (204.9525461487 Gm)
Eccentricity0.1684192964511710
1.60 yr (585.72 d)
337.8470256565600°
0° 36m 52.66s / day
Inclination15.65150318051197°
215.4605646418820°
192.858019947831°
Earth MOID0.148912 AU (22.2769 Gm)
Physical characteristics
Dimensions520 meters (est. at 0.20)[3]
Sq [2]
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 AU (4,364,000 km; 2,712,000 mi) from Mars.[2]

References

  1. ^ "(4947) Ninkasi = 1988 TJ1". Minor Planet Center. Retrieved 4 June 2015.
  2. ^ a b c d e "JPL Small-Body Database Browser: 4947 Ninkasi (1988 TJ1)". Jet Propulsion Laboratory. Retrieved 13 April 2016.
  3. ^ a b "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 2 November 2017.
  4. ^ Dictionary of minor planet names, by Lutz D. Schmadel.


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