1128 Astrid
1128 Astrid, provisional designation 1929 EB, is a carbonaceous Astridian asteroid from the central region of the asteroid belt. It is the parent body of the Astrid family and measures approximately 40 kilometers in diameter.
| Discovery | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 10 March 1929 |
| Designations | |
MPC designation | (1128) Astrid |
Named after | Astrid of Sweden (Queen consort of the Belgians) |
Alternative designations | 1929 EB · 1949 QF2 1954 UL3 · 1964 VW 1972 LM1 · A917 SQ A920 JA |
Minor planet category | main-belt · (middle) · Astrid |
| Adjectives | Astridian |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 97.07 yr (35,455 days) |
| Aphelion | 2.9171 AU |
| Perihelion | 2.6577 AU |
Semi-major axis | 2.7874 AU |
| Eccentricity | 0.0465 |
Orbital period (sidereal) | 4.65 yr (1,700 days) |
Mean anomaly | 248.28° |
Mean motion | 0° 12m 42.48s / day |
| Inclination | 1.0145° |
Longitude of ascending node | 59.420° |
| 234.37° | |
| Physical characteristics | |
| Dimensions | 33.28±9.67 km 34.60 km (derived) 34.69±2.1 km 41.851±0.278 km 41.97±0.72 km 44.784±0.912 km 45.03±10.37 km 52.48±0.40 km |
Synodic rotation period | 10.2±0.1 h 10.228±0.002 h 10.229±0.0031 h |
| 0.031±0.004 0.04±0.02 0.0462±0.0181 0.053±0.002 0.06±0.03 0.0644 (derived) 0.0770±0.010 | |
| SMASS = C · C | |
| 10.588±0.002 (R) · 10.70 · 10.80 · 10.90 · 10.93 · 11.02±0.35 | |
The asteroid was discovered by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle on 10 March 1929, and later named for Astrid of Sweden, Queen consort of the Belgians.
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