Discovery[1] | |
---|---|
Discovered by | C. Shoemaker E. Shoemaker |
Discovery site | Palomar Obs. |
Discovery date | 8 October 1988 |
Designations | |
(11277) Ballard | |
Named after | Robert Ballard[1] (American oceanographer) |
1988 TW2 · 1995 MG | |
main-belt[1][2] · (inner) Phocaea[3][4] | |
Orbital characteristics[2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 28.73 yr (10,493 d) |
Aphelion | 2.9757 AU |
Perihelion | 1.8295 AU |
2.4026 AU | |
Eccentricity | 0.2385 |
3.72 yr (1,360 d) | |
22.337° | |
0° 15m 52.92s / day | |
Inclination | 22.787° |
254.59° | |
43.574° | |
Physical characteristics | |
6.298±0.075 km[3][5][6] | |
>10 h[7] | |
0.222[5][6] | |
S (assumed)[4] | |
13.00[5][8][9] 13.10[1][2][4][10] 13.53[11] | |
11277 Ballard (provisional designation 1988 TW2) is a Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers (3.9 miles) in diameter. It was discovered on 8 October 1988, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California.[1] The assumed S-type asteroid has a rotation period of at least 10 hours.[4] It was named for American marine scientist Robert Ballard.[1]
MPC-object
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