_Ducrosa.png) Modelled shape of Ducrosa from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 15 March 1895 |
| Designations | |
| MPC designation | (400) Ducrosa |
| Named after | J. Ducros |
| Alternative designations | 1895 BU |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 121.08 yr (44225 d) |
| Aphelion | 3.49063 AU (522.191 Gm) |
| Perihelion | 2.76117 AU (413.065 Gm) |
| Semi-major axis | 3.12590 AU (467.628 Gm) |
| Eccentricity | 0.11668 |
| Orbital period (sidereal) | 5.527 yr (2,018.6 d) |
| Average orbital speed | 16.84 km/s |
| Mean anomaly | 294.184° |
| Mean motion | 0° 10 42.013 / day |
| Inclination | 10.5354° |
| Longitude of ascending node | 327.145° |
| Argument of perihelion | 238.468° |
| Earth MOID | 1.7762 AU (265.72 Gm) |
| Jupiter MOID | 1.59886 AU (239.186 Gm) |
| TJupiter | 3.178 |
| Physical characteristics | |
| Dimensions | 33.66±1.6 km |
| Synodic rotation period | 6.87 h (0.286 d) 6.87 ± 0.01 hours |
| Geometric albedo | 0.1423±0.014 |
| Spectral type | B |
| Absolute magnitude (H) | 10.5 |
400 Ducrosa is a typical Main belt asteroid. It was discovered by Auguste Charlois on 15 March 1895 in Nice, and named for It J. Ducros, a mechanic at the Nice Observatory. This minor planet is orbiting the Sun at a distance of 3.126 AU with a period of 5.527 yr and an orbital eccentricity of 0.117. The orbital plane is inclined at an angle of 10.5° to the plane of the ecliptic.
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This asteroid has a B-type taxonomy, indicating it has a relatively bright geometric albedo for a carbonaceous asteroid. It has an estimated diameter of 33.66±1.6 km. Photometric measurements of the asteroid made in 2005 at the Palmer Divide Observatory showed a light curve with a rotation period of 6.87±0.01 h and a brightness variation of 0.62±0.02 in magnitude. A 2020 study found a rotation period of 6.8678±0.0001 h with a variation of 0.57±0.03 magnitude.
References
- ^ "400 Ducrosa (1895 BU)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 10 May 2016.
- ^ Warner, Brian D. (2005). "Asteroid lightcurve analysis at the Palmer Divide Observatory - winter 2004-2005". The Minor Planet Bulletin. 32 (3): 54–58. Bibcode:2005MPBu...32...54W.
{{cite journal}}: CS1 maint: postscript (link) - ^ Hasegawa, Sunao; et al. (February 2021). "The nature of bright C-complex asteroids". Publications of the Astronomical Society of Japan. 73 (1): 240–255. arXiv:2012.07141. Bibcode:2021PASJ...73..240H. doi:10.1093/pasj/psaa118.
- Schmadel, L. D. (2013). Dictionary of Minor Planet Names. Germany: Springer Berlin Heidelberg. p. 73.
- Pilcher, Frederick (January 2020). "Lightcurves and Rotation Periods of 33 Polyhymnia, 206 Hersilia, 395 Delia, 400 Ducrosa, 900 Rosalinde, and 1066 Lobelia". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 47 (1): 34–36. Bibcode:2020MPBu...47...34P.
External links
- Lightcurve plot of 400 Ducrosa, Palmer Divide Observatory, B. D. Warner (2005)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 400 Ducrosa at AstDyS-2, Asteroids—Dynamic Site
- 400 Ducrosa at the JPL Small-Body Database
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