1684 Iguassú
| Discovery [1] | |
|---|---|
| Discovered by | M. Itzigsohn |
| Discovery site | La Plata Observatory |
| Discovery date | 23 August 1951 |
| Designations | |
| MPC designation | 1684 Iguassu |
|
Named after
|
Iguazu Falls[2] |
| 1951 QE · 1934 LN 1935 SK1 · 1939 HK 1949 DE · 1950 JT 1965 AA1 · A922 DA |
|
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.58 yr (34,180 days) |
| Aphelion | 3.4819 AU |
| Perihelion | 2.7106 AU |
| 3.0963 AU | |
| Eccentricity | 0.1245 |
| 5.45 yr (1,990 days) | |
| 328.87° | |
| Inclination | 3.6669° |
| 105.41° | |
| 154.09° | |
| Physical characteristics | |
| Dimensions | 26.53 km 30.62 km (calculated)[3] |
| 9.1423±0.0033 h[4] 9.230±0.170 h[5] |
|
| 0.1202[1] 0.057 (assumed)[3] |
|
| C [3] | |
| 10.9 | |
1684 Iguassu, provisional designation 1951 QE, is a carbonaceous asteroid from the outer region of the asteroid belt, about 27 kilometers in diameter. It was discovered on 23 August 1951 by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory, located in the city of La Plata, capital of province of the Buenos Aires.[6]
The asteroid orbits the Sun at a distance of 2.7–3.5 AU once every 5.45 years (1,990 days). Its orbit shows an eccentricity of 0.12 and is tilted by 4 degrees to the plane of the ecliptic. The Lightcurve Database project assumes the body to be a C-type asteroid with a corresponding low albedo of 0.06, while seven older observations by the Infrared Astronomical Satellite, IRAS, gave a much higher value of 0.12.[3]
In 2014, two photometric light-curve measurements determined the body's rotation period to be 9.14 and 9.23 hours, respectively, both with a brightness change of 0.15 in magnitude.[4][5]
It is named after the large, 60-meters high and 1-kilometer wide waterfall, the Iguazu Falls, which river of the same name marks part of the boundary between Argentina and Brazil.[2] As a curiosity, the spelling of the minor planet's name Iguassú neither concurs with the Spanish "Iguazú" nor with the Portuguese "Iguaçu". It is rather similar to "Yguasu", used in the native Guarani language, from which the waterfall's name originates.
References
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- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
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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
- 1684 Iguassú at the JPL Small-Body Database
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