71000 Hughdowns
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| Discovery A | |
|---|---|
| Discoverer | Charles W. Juels |
| Discovery date | December 7, 1999 |
| Alternate designations B |
1999 XD37 |
| Category | Main belt |
| Orbital elements C | |
|
|
|
| Eccentricity (e) | 0.185 |
| Semi-major axis (a) | 399.430 Gm (2.670 AU) |
| Perihelion (q) | 325.645 Gm (2.177 AU) |
| Aphelion (Q) | 473.216 Gm (3.163 AU) |
| Orbital period (P) | 1593.572 d (4.36 a) |
| Mean orbital speed | 18.07 km/s |
| Inclination (i) | 13.003° |
| Longitude of the ascending node (Ω) |
93.496° |
| Argument of perihelion (ω) |
322.502° |
| Mean anomaly (M) | 138.415° |
| Physical characteristics D | |
| Dimensions | ? km |
| Mass | ?×10? kg |
| Density | ? g/cm³ |
| Surface gravity | ? m/s² |
| Escape velocity | ? km/s |
| Rotation period | ? d |
| Spectral class | ? |
| Absolute magnitude | 14.2 |
| Albedo (geometric) | 0.1? |
| Mean surface temperature |
~170 K |
The asteroid 71000 Hughdowns, provisional designation 1999 XD37, is named after American television host Hugh Downs, popular for his co-hosting career on the ABC news show 20/20. It was discovered on December 7, 1999 by Charles W. Juels.
| Minor planets | ||
|---|---|---|
| Previous minor planet | 71000 Hughdowns | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
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