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 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.85 yr (29896 days) |
| Aphelion | 3.2281 AU (482.92 Gm) |
| Perihelion | 1.9443 AU (290.86 Gm) |
| 2.5862 AU (386.89 Gm) | |
| Eccentricity | 0.24820 |
| 4.16 yr (1519.1 d) | |
| 214.48° | |
| 0° 14m 13.128s / day | |
| Inclination | 18.626° |
| 105.33° | |
| 228.85° | |
| Earth MOID | 0.976764 AU (146.1218 Gm) |
| Jupiter MOID | 2.21339 AU (331.118 Gm) |
| Jupiter Tisserand parameter | 3.306 |
| Physical characteristics | |
| Dimensions |
29.64 km[4] 27.96±0.48 km[5] 29.59 km (derived)[3] |
Mean radius | 14.82 ± 0.85 km |
|
19.46 h (0.811 d)[1][6] 23±1 h[7] | |
|
0.1147[4] 0.133±0.005[5] 0.1078 (derived)[3] 0.1147 ± 0.014[1] | |
|
B–V = 0.860 U–B = 0.390 S [3] | |
| 10.6 | |
|
| |
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
- 1 2 3 4 "JPL Small-Body Database Browser: 1609 Brenda (1951 NL)" (2015-04-01 last obs.). Jet Propulsion Laboratory. Retrieved 25 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1609) Brenda. Springer Berlin Heidelberg. p. 128. ISBN 978-3-540-29925-7. Retrieved November 2015.
- 1 2 3 4 "LCDB Data for (1609) Brenda". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
- 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved November 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
- 1 2 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus: 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Retrieved November 2015.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1609) Brenda". Geneva Observatory. Retrieved November 2015.
- ↑ "1609 Brenda (1951 NL)". Minor Planet Center. Retrieved November 2015.
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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