(747) Winchester is a large asteroid of the Main Belt , which was discovered on March 7, 1913 by the American astronomer Joel Metcalf and named after the American city of Winchester ( Massachusetts , USA ), from where the discoverer made his observations [2] .
- The orbit of the asteroid Winchester and its position in the solar system
| (747) Winchester | |
|---|---|
| Asteroid | |
 Three-dimensional model of the asteroid (747) Winchester | |
| Opening | |
| Discoverer | Joel Metcalf |
| Place of discovery | Winchester |
| Discovery date | March 7, 1913 |
| Eponym | Winchester |
| Alternative notation | 1913 QZ |
| Category | Main ring |
| Orbital characteristics | |
| Age of August 27, 2011 JD 2455800.5 | |
| Eccentricity ( e ) | 0.3411151 |
| Semimajor axis ( a ) | 448.673 million km (2,9991937 AU ) |
| Perihelion ( q ) | 295.624 million km (1.9761234 AU) |
| Aphelion ( Q ) | 601.722 million km (4.022264 AU) |
| Circulation Period ( P ) | 1897.165 days (5.194 g. ) |
| Average orbital speed | 16.686 km / s |
| Inclination ( i ) | 18.168204 ° |
| Longitude node (Ω) | 130.13817 ° |
| Perihelion Argument (ω) | 275.29195 ° |
| Median Anomaly ( M ) | 77.987774 ° |
| physical characteristics | |
| Diameter | 171.71 km |
| Weight | (3.81 ± 2.22) ⋅10 18 kg |
| Density | 1.47 ± 0.87 g / cm³ [1] |
| Rotation period | 9.4146 h |
| Spectral class | C |
| Apparent magnitude | 13.3 m (current) |
| Absolute magnitude | 7.69 m |
| Albedo | 0,0503 |
| Current distance from the sun | 3.31 a. e. |
| Current distance from earth | 2,702 a. e. |
Photometric observations made in 2007 at the Palmer Divide Observatory made it possible to obtain the light curves of this body, from which it followed that the period of rotation of the asteroid around its axis is 9.4146 ± 0.0002 hours, with a change in brightness with rotation of 0.16 ± 0.02 m [3] .
See also
- List of asteroids ( 701-800 )
- Classifications of Minor Planets
Notes
- ↑ Carry, B. (December 2012), Density of asteroids , vol. 73, p. 98–118 , DOI 10.1016 / j.pss.2012.03.03.009 See table one.
- ↑ 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 .
- ↑ Warner, Brian D. (December 2007), Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March-May 2007 , vol. 34, p. 104–107
Links
- NASA JPL Small Solar System Bodies (747 )
- Small Solar System MPC Database (747 )
- Asteroids and comets rotation curves, CdR - Observatoire de Genève, Raoul Behrend
- Lightcurve plot of 747 Winchester , Palmer Divide Observatory, BD Warner (2007)
- Asteroid Lightcurve Database (LCDB) , query form ( info )