Global Information1580 Betulia information
 Lightcurve-based 3D-model of Betulia | |
| Discovery[1] | |
|---|---|
| Discovered by | E. L. Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 22 May 1950 |
| Designations | |
MPC designation | (1580) Betulia |
| Pronunciation | /bɛˈtjuːliə/ |
Named after | Betulia Toro Herrick (wife of astronomer S. Herrick)[2] |
Alternative designations | 1950 KA |
Minor planet category | NEO · Amor[1][3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.64 yr (24,342 days) |
| Aphelion | 3.2684 AU |
| Perihelion | 1.1258 AU |
Semi-major axis | 2.1971 AU |
| Eccentricity | 0.4876 |
Orbital period (sidereal) | 3.26 yr (1,190 days) |
Mean anomaly | 252.41° |
Mean motion | 0° 18m 9.36s / day |
| Inclination | 52.096° |
Longitude of ascending node | 62.291° |
Argument of perihelion | 159.50° |
| Earth MOID | 0.1365 AU · 53.2 LD |
| Physical characteristics | |
| Dimensions | 3.82 km[4] 3.9 km[5] 4.2 km (CALL-LCDB)[6] 4.57 km[7] 5.37±0.04 km[8] 5.39±0.54 km[9] 5.8 km (Gehrels 1994)[1] 8.55±5.23 km[10] |
Synodic rotation period | 6.130 h[11] 6.1324±0.0002 h[12] 6.134 h[13] 6.135±0.005 h[14] 6.13836 h[9][15] 6.156 h[16] 6.48 h[17] |
Geometric albedo | 0.04±0.08[10] 0.05[18] 0.07±0.01[8] 0.077[7] 0.08 (Gehrels 1994)[1] 0.09 (CALL-LCDB)[6] 0.11[4] 0.17[5] |
Spectral type | Tholen = C[1][6] · B[19] B–V = 0.656[1] U–B = 0.249[1] |
Absolute magnitude (H) | 14.00[19] · 14.5[10] · 14.53[7] · 14.58[5] · 14.8[1] · 14.8±0.3[12] · 14.90[8] · 15.1[4][6] |
1580 Betulia, provisional designation 1950 KA, is an eccentric, carbonaceous asteroid, classified as near-Earth object of the Amor group, approximately 4.2 kilometers in diameter. It was discovered on 22 May 1950, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg.[3] The asteroid was named for Betulia Toro, wife of astronomer Samuel Herrick.[2]
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