(6382) 1988 EL
Hungaria asteroid
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(6382) 1988 EL (provisional designation 1988 EL) is a stony Hungaria asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 14 March 1988, by American astronomer Jeffrey Alu at the U.S. Palomar Observatory, California.[2]
| Discovery[1] | |
|---|---|
| Discovered by | J. Alu |
| Discovery site | Palomar Obs. |
| Discovery date | 14 March 1988 |
| Designations | |
| (6382) 1988 EL | |
| 1988 EL · 1983 EC1 | |
| main-belt · (inner)[1] Hungaria[2][3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 29.01 yr (10,596 days) |
| Aphelion | 1.9102 AU |
| Perihelion | 1.7388 AU |
| 1.8245 AU | |
| Eccentricity | 0.0470 |
| 2.46 yr (900 days) | |
| 349.44° | |
| 0° 23m 59.64s / day | |
| Inclination | 18.556° |
| 350.60° | |
| 191.91° | |
| Physical characteristics | |
| Dimensions | 4.22 km (calculated)[3] 4.931±0.042 km[1][4] 5.311±0.013 km[5] |
| 2.892±0.005 h[6] 2.8932±0.0005 h[7] 2.894±0.001 h[8] 2.895±0.002 h[9] 2.898±0.001 h[10] | |
| 0.1896±0.0604[5] 0.254±0.035[1][4] 0.3 (assumed)[3] | |
| E[3] · S[8] | |
| 13.8[1][3][5] · 14.08±0.49[11] | |
Orbit and classification
The presumed E-type asteroid may not be a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System, but an unrelated interloper, which intruded into the Hungaria orbital space, as indicated by a lower albedos from observations by the NEOWISE mission.[7]:â169â It orbits the Sun at a distance of 1.7â1.9 AU once every 2 years and 6 months (900 days). Its orbit has an eccentricity of 0.05 and an inclination of 19° with respect to the ecliptic.[1] The body's first yet unused observation was made at the Chinese Purple Mountain Observatory in 1983.[2] On 13 April 2042 and on 3 October 2113, the asteroid will pass 0.086 AU (12,900,000 km) and 0.092 AU (13,800,000 km) from Mars, respectively.[1]
Rotation period
Between February 2005 and January 2015, American astronomer Brian D. Warner obtained 5 rotational lightcurves for this asteroid from photometric observations at the CS3âPalmer Divide Station in Colorado. The lightcurves gave a well-defined rotation period of 2.892â2.898 hours with a low brightness variation between 0.06 and 0.15 magnitude (U=2/3-/3/2+/3).[6][7][8][9][10]
Diameter and albedo
According to two different data sets from space-based survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 4.9 and 5.3 kilometers in diameter and its surface has an albedo of 0.19 and 0.25, respectively,[5][4] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 â a compromise value between 0.4 and 0.2, corresponding to the Hungaria asteroids as collisional family and orbital group, respectively â and calculates a smaller diameter of 4.2 kilometers, based on an absolute magnitude of 13.8.[3]
Naming
As of 2017, 1988 EL remains unnamed.[2]
