1058 Grubba
Modelled shape of Grubba from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | G. Shajn |
| Discovery site | Simeiz Obs. |
| Discovery date | 22 June 1925 |
| Designations | |
| (1058) Grubba | |
Named after | Howard Grubb (Irish telescope maker) |
| 1925 MA · 1932 WO 1955 YH · A906 VG | |
| main-belt · (inner) Flora · Augusta | |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.28 yr (40,646 d) |
| Aphelion | 2.6082 AU |
| Perihelion | 1.7842 AU |
| 2.1962 AU | |
| Eccentricity | 0.1876 |
| 3.25 yr (1,189 d) | |
| 149.50° | |
| 0° 18m 10.08s / day | |
| Inclination | 3.6932° |
| 221.75° | |
| 94.490° | |
| Physical characteristics | |
| 10.920±0.057 km 11.910±0.270 km 13.03±0.28 km 14.64 km (derived) | |
| >12 h >18 h >20 h 46.30±0.01 h | |
| 0.133 0.171±0.008 0.201±0.020 0.2416±0.0245 | |
| Tholen = S SMASS = S B–V = 0.880 U–B = 0.500 | |
| 11.82±0.20 11.98 | |
1058 Grubba, provisional designation 1925 MA, is a stony Flora asteroid from the inner regions of the asteroid belt. It was discovered on 22 June 1925, by Soviet–Russian astronomer Grigory Shajn at the Simeiz Observatory on the Crimean peninsula. The S-type asteroid was named for Irish telescope maker Howard Grubb. It has a longer-than average rotation period of 46.30 hours and measures approximately 12 kilometers (7.5 miles) in diameter.