|Discovered by||Z. Moravec|
|Discovery site||Kleť Obs.|
|Discovery date||16 January 1996|
|MPC designation||(7796) Járacimrman|
|Pronunciation||Czech pronunciation: [ˈjaːratsɪmr̩man]|
(Czech fictional character)
|1996 BG · 1973 YE3
|main-belt · IIa family|
|Orbital characteristics |
|Epoch 16 February 2017 (JD 2457800.5)|
|Uncertainty parameter 0|
|Observation arc||26.14 yr (9,549 days)|
|4.35 yr (1,590 days)|
|0° 13m 35.04s / day|
|Dimensions||±0.313 km 11.312|
7796 Járacimrman (Czech pronunciation: [ˈjaːratsɪmr̩man]) is a dark asteroid orbiting in the middle region of the asteroid belt. It belongs to the IIa family of asteroids and measures approximately 11 kilometers in diameter.
Járacimrman was discovered by Zdeněk Moravec at the Kleť Observatory (Czech Republic) on 16 January 1996 and was initially designated 1996 BG. Observations continued until April 1996, and then again between June and July 1997. The asteroid was later determined to be a lost asteroid which had previously been observed twice: at the Brera-Merate Observatory in northern Italy on 12 December 1973, and at Mount Stromlo Observatory, near Canberra, Australia, on 8 and 9 July 1990.
In 1997, Járacimrman's orbit was calculated more precisely by additional observatories and it could therefore be numbered as asteroid 7796, the 312th recognized (numbered) asteroid discovered at the Kleť Observatory. Moravec suggested naming it after the fictional Czech polymath Jára Cimrman.
The citation accompanying the suggestion said: "Named for Jára Cimrman, a fictitious Czech genius. An analogue to Leonardo da Vinci, he was a playwright, composer, poet, painter, versatile scientist, inventor, polar explorer, sportsman, first man on the moon, etc. Although his name is not mentioned in any encyclopedia, his work is explored at the Jára Cimrman Theatre in Prague. This theatre is headed by the famous cimrmanologists Z. Svěrák and L. Smoljak, who endorsed the name proposal." The name was approved by International Astronomical Union (IAU) Committee on Small Body Nomenclature and published on 11 February 1998 (M.P.C. 31298).
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Járacimrman measures 11.312 kilometers in diameter and its surface has an albedo of 0.055, which is typical for carbonaceous C-type asteroids. However, no spectral data is available for the asteroid, thus neither its chemical nor mineralogical composition is currently known. In addition, no rotational lightcurve has been obtained of Járacimrman as of 2017.
- "JPL Small-Body Database Browser: 7796 Jaracimrman (1996 BG)" (2016-12-31 last obs.). Jet Propulsion Laboratory. Retrieved 29 March 2017.
- Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7796) Járacimrman. Springer Berlin Heidelberg. p. 616. ISBN 978-3-540-00238-3. Retrieved 29 March 2017.
- Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 29 March 2017.
- "7796 Jaracimrman (1996 BG)". Minor Planet Center. Retrieved 29 March 2017.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 March 2017.
- "LCDB Data for (7796) Járacimrman". Asteroid Lightcurve Database (LCDB). Retrieved 29 March 2017.
- 7796 Járacimrman in Kleť minor planets database
- 7796 Járacimrman, AstDys asteroid orbital elements database
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 7796 Járacimrman at the JPL Small-Body Database