1609 Brenda
| Discovery [1] | |
|---|---|
| Discovered by | E. L. Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 10 July 1951 |
| Designations | |
| MPC designation | 1609 Brenda |
|
Named after
|
Brenda (granddaughter of discoverer)[2] |
| 1951 NL · 1925 EA 1934 JB · 1947 WB 1950 HD · 1954 EP 1954 HE |
|
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 80.82 yr (29,520 days) |
| Aphelion | 3.2277 AU |
| Perihelion | 1.9398 AU |
| 2.5838 AU | |
| Eccentricity | 0.2492 |
| 4.15 yr (1,517 days) | |
| 119.89° | |
| Inclination | 18.655° |
| 105.42° | |
| 228.57° | |
| Physical characteristics | |
| Dimensions | 29.64 km[4] 27.96±0.48 km[5] 29.59 km (derived)[3] |
| 19.46 h[6] 23±1 h[7] |
|
| 0.1147[4] 0.133±0.005[5] 0.1078 (derived)[3] |
|
| B–V = 0.860 U–B = 0.390 S [3] |
|
| 10.6 | |
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1609 Brenda, provisional designation 1951 NL, is an eccentric, stony asteroid from the inner regions of the asteroid belt, about 30 kilometers in diameter. It was discovered by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg on 10 July 1951.[8]
The S-type asteroid orbits the Sun at a distance of 1.9–3.2 AU once every 4 years and 2 months (1,517 days). Its orbit shows an eccentricity of 0.25 and is tilted by 19 degrees to the plane of the ecliptic. It has a rotation period of 19 and 23 hours, depending on different observations.[6][7] Based on the IRAS and Akari surveys, its albedo lies between 0.11 and 0.13.[4][5]
The minor planet was named by the discoverer after his granddaughter, Brenda.[2] Ernest Johnson also discovered the periodic comet 48P/Johnson using the Franklin-Adams Star Camera.
References
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<references />, or <references group="..." />External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1609 Brenda at the JPL Small-Body Database
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