(846) Lippert ( lat. Lipperta ) - an asteroid of the main belt , which is part of the Themis family . It was discovered on November 26, 1916 by the German astronomer K. Gyllenberg in the Hamburg Observatory and named after Edward Lippert, a German businessman who often sponsored this observatory [1] .
| (846) Lippert | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | K. Gyllenberg |
| Detection point | Hamburg |
| Date of discovery | November 26, 1916 |
| Alternative designations | 1916 AT ; 1933 XF; 1943 QF; 1949 UB 1 ; A912 AD |
| Category | Main ring ( Themis Family ) |
| Orbital characteristics | |
| The Age of February 16, 2017 JD 2457800.5 | |
| Eccentricity ( e ) | 0.1822317 |
| Semi-axis ( a ) | 467.616 million km (3.1258220 a. E.) |
| Perihelion ( q ) | 382.402 million km (2,5561981 a. E.) |
| Afhelia ( Q ) | 552.831 million km (3,6954459 a. E.) |
| Period of circulation ( P ) | 2018,575 days (5.527 g. ) |
| Average orbital speed | 16.706 km / s |
| Inclination ( i ) | 0.26435 ° |
| Ascending node longitude (Ω) | 261.43733 ° |
| Perihelion Argument (ω) | 129.20306 ° |
| Mean Anomaly ( M ) | 63.26520 ° |
| physical characteristics | |
| Diameter | 52.41 km |
| Rotation period | 1641 h |
| Apparent magnitude | 16.53 m (current) |
| Absolute magnitude | 10.26 m |
| Albedo | 0.0506 |
| Current distance from the Sun | 3,581 a. e. |
| Current distance from Earth | 3,335 e. |
The exact duration of the day on the asteroid is unknown. An analysis of the light curves of the asteroid (846) Lippert showed an extremely long period of rotation of this asteroid. But this result was obtained on the basis of incomplete data, so that the real period of rotation may differ by about 30% from the specified. A similar situation arose due to the fact that during the observation it was not possible to record significant albedo differences as the asteroids rotate. There are three possible explanations for this: a) extremely slow rotation; b) at the moment of observation, the axis of rotation was strongly inclined (the asteroid was turned towards us by one of the poles); c) an asteroid is a spherical body with an extremely uniform albedo [2] .
See also
- List of asteroids ( 801-900 )
- Small Planet Classifications
- Asteroid family
Notes
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003. - P. 71. - ISBN 3-540-00238-3 .
- ↑ Buchheim, Robert K .; Gartrelle, Gordon M. 846 Lipperta: A Very Slow Rotator (Eng.) // The Minor Planet Bulletin . - Association of Lunar and Planetary Observers , 2011. - July ( vol. 38 , no. 3 ). - P. 151-153 . - ISSN 1052-8091 . - .