(6178) 1986 DA
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(6178) 1986 DA is a metallic asteroid, classified as near-Earth object of the Amor group, approximately 3 kilometers in diameter. It was discovered on 16 February 1986, by Japanese astronomer Minoru Kizawa at Shizuoka Observatory, Japan.[2]
Quick Facts Discovery, Discovered by ...
Discovery[1] | |
---|---|
Discovered by | M. Kizawa |
Discovery site | Shizuoka Obs. |
Discovery date | 16 February 1986 |
Designations | |
(6178) 1986 DA | |
1986 DA | |
Amor · NEO[2] | |
Orbital characteristics[1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 38.03 yr (13,890 days) |
Aphelion | 4.4648 AU |
Perihelion | 1.1805 AU |
2.8226 AU | |
Eccentricity | 0.5818 |
4.74 yr (1,732 days) | |
233.20° | |
0° 12m 28.08s / day | |
Inclination | 4.3056° |
64.643° | |
127.36° | |
Earth MOID | 0.1922 AU · 74.9 LD |
Jupiter MOID | 0.5212 AU |
Physical characteristics | |
2.3 km (dated)[1] 3.149 km[3] 3.15 km (taken)[4] 3.199±0.207 km[5] | |
3.50 h[6][lower-alpha 1] 3.51 h[7] | |
0.0778[3] 0.15[1] 0.161±0.034[5] | |
M[4][8] B–V = 0.677[1] U–B = 0.267[1] | |
15.1[1][5] · 15.40±0.1 (R)[lower-alpha 1] · 15.9±0.112[3][4] · 16.11[7] | |
Close
1986 DA was the first near Earth asteroid thought to be of metallic composition, with high radar brightness; with that it was predicted to have 100 thousand tons of platinum group metals including gold and suggested as a resource for future space colonists.[9]