4197 Morpheus
From Infogalactic: the planetary knowledge core
| Discovery[1] | |
|---|---|
| Discovered by | E. F. Helin and E. M. Shoemaker |
| Discovery date | October 11, 1982 |
| Designations | |
| none | |
| Apollo, Mars-crosser, Venus-crosser | |
| Orbital characteristics[2] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 609.578 Gm (4.075 AU) |
| Perihelion | 78.708 Gm (0.526 AU) |
| 344.143 Gm (2.300 AU) | |
| Eccentricity | 0.771 |
| 1274.441 d (3.49 a) | |
|
Average orbital speed
|
16.27 km/s |
| 317.807° | |
| Inclination | 12.219° |
| 10.001° | |
| 119.441° | |
| Physical characteristics | |
| Dimensions | 1.7 km |
| Mass | ~5.1×1012 kg |
|
Mean density
|
2.0? g/cm³ |
|
Equatorial surface gravity
|
~0.0005 m/s² |
|
Equatorial escape velocity
|
~0.0009 km/s |
|
Sidereal rotation period
|
0.147418±0.000002 d (3.53802±0.00005 h) [1] |
| ?° | |
|
Pole ecliptic latitude
|
? |
|
Pole ecliptic longitude
|
? |
| 0.10? | |
| Temperature | ~183 K |
| ? | |
| 14.6 | |
4197 Morpheus, provisional designation 1982 TA, is an Apollo, Mars- and Venus-crosser asteroid, only 1.7 km in diameter. It was discovered on October 11, 1982, by American astronomers Eleanor Helin and Eugene Shoemaker.
In 1996, astronomers at the Goldstone Observatory analysed it using radar delay-Doppler imaging. The resultant images are not very clear, but they show that (4197) 1982 TA has a roughly triangular shape, and a 3-hour rotation period.
It's named after Morpheus.
References
- ↑ P. Pravec, L. Šarounová, M. Wolf, I. R. V. Ferrin, J. Zhu : CCD photometry of asteroids (4197) 1982 TA and 1997 LY4, Planetary and Space Science , Vol. 48, No. 1, pp. 59-65 (2000) http://abob.libs.uga.edu/bobk/ccc/cc032100.html
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This near-Earth asteroid-related article is a stub. You can help Wikipedia by expanding it. |
