1609 Brenda
1609 Brenda, provisional designation 1951 NL, is a stony asteroid from the central region of the asteroid belt, approximately 28 kilometers in diameter. It was discovered on 10 July 1951, by South African astronomer Ernest Johnson at the Johannesburg Observatory in South Africa, and named after his granddaughter, Brenda.
| Discovery | |
|---|---|
| Discovered by | E. L. Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 10 July 1951 |
| Designations | |
MPC designation | (1609) Brenda |
Named after | Brenda (discoverer's granddaughter) |
Alternative designations | 1951 NL · 1925 EA 1934 JB · 1947 WB 1950 HD · 1954 EP 1954 HE |
Minor planet category | main-belt · (middle) Gersuind |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.98 yr (30,310 days) |
| Aphelion | 3.2255 AU |
| Perihelion | 1.9432 AU |
Semi-major axis | 2.5844 AU |
| Eccentricity | 0.2481 |
Orbital period (sidereal) | 4.15 yr (1,518 days) |
Mean anomaly | 309.08° |
Mean motion | 0° 14m 13.92s / day |
| Inclination | 18.628° |
Longitude of ascending node | 105.23° |
| 229.14° | |
| Physical characteristics | |
| Dimensions | 26.27±6.75 km 27.96±0.48 km 29.59 km (derived) 29.64±1.7 km (IRAS:6) |
Synodic rotation period | 19.46 h 23±1 h |
| 0.1078 (derived) 0.1147±0.014 (IRAS:6) 0.13±0.05 0.133±0.005 | |
| S B–V = 0.860 U–B = 0.390 | |
| 10.50 · 10.6 · 10.61 · 10.68 | |
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