(817) Annika ( lat.Annika ) is an asteroid of the main belt , discovered on February 6, 1916 by the German astronomer Max Wolf at the Heidelberg Observatory .
| (817) Annika | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Max Wolf |
| Place of discovery | Heidelberg |
| Discovery date | February 6, 1916 |
| Alternative notation | 1916 YW |
| Category | Main ring |
| Orbital characteristics | |
| Age of March 23, 2018 JD 2458200.5 | |
| Eccentricity ( e ) | 0.1798113410819626 |
| Semimajor axis ( a ) | 387.438 million km (2,589863041961337 a.u.) |
| Perihelion ( q ) | 317.772 million km (2.1241762951677 A.E.) |
| Aphelion ( Q ) | 457.104 million km (3.055549788755 AU) |
| Circulation Period ( P ) | 1522.347 days (4.168 g. ) |
| Average orbital speed | 18.357 km / s |
| Inclination ( i ) | 11.33381913074992 ° |
| Longitude node (Ω) | 125.4780365492452 ° |
| Perihelion Argument (ω) | 285.1758187358354 ° |
| Median Anomaly ( M ) | 231.8596677454364 ° |
| physical characteristics | |
| Diameter | 22,891 km |
| Rotation period | 10.56 h |
| Apparent magnitude | 14.57 m (current) |
| Absolute magnitude | 10.6 m |
| Albedo | 0.187 |
| Current distance from the sun | 2.125 a. e. |
| Current distance from earth | 1,668 a. e. |
Any coincidence of the name of this asteroid with a specific person or a certain event is unknown [1] .
Content
- 1 Rapprochement
- 2 See also
- 3 notes
- 4 References
Convergence
| date of | but. e. | distances to the moon | heavenly body |
|---|---|---|---|
| 02.17.2017 07:53 | 0.042296 | 16,4 | Vesta |
See also
- List of Asteroids ( 801-900 )
- Classifications of Minor Planets
Notes
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003 .-- P. 76. - ISBN 3-540-00238-3 .