7796 Járacimrman

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7796 Járacimrman
Discovered by Zdeněk Moravec
Discovery date 16 January 1996
Named after
Jára Cimrman
1996 BG; 1990 VG;
1973 YE3
Main belt (IIa family)
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 9107 days (24.93 yr)
Aphelion 3.0444 AU (455.44 Gm)
Perihelion 2.2880 AU (342.28 Gm)
2.6662 AU (398.86 Gm)
Eccentricity 0.14186
4.35 yr (1590.1 d)
18.15 km/s
0° 13m 35.04s / day
Inclination 12.810°
Earth MOID 1.31899 AU (197.318 Gm)
Jupiter MOID 2.0915 AU (312.88 Gm)
Jupiter Tisserand parameter 3.334
Physical characteristics
Dimensions 12.54 km
Mean radius
6.27 ± 0.45 km
Mass 3.1–35?×1014 kg
Mean density
2? g/cm³
Equatorial surface gravity
0.0019–0.0042? m/s²
Equatorial escape velocity
0.0035–0.0079? km/s
0.0408 ± 0.006
Temperature ~186–176 K

7796 Járacimrman (Czech pronunciation: [ˈjaːratsɪmr̩man]; sometimes spelt Jaracimrman) is an asteroid orbiting in the asteroid belt between Mars and Jupiter. It belongs to the IIa family of asteroids. It cannot approach the Earth nearer than 197 million km.


The asteroid was discovered by Zdeněk Moravec at the Kleť Observatory (Czech Republic) on 16 January 1996 and was initially designated 1996 BG.[2] Observations continued until April 1996 and then again between June and July 1997. The asteroid was later determined to 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, the asteroid 7796 Járacimrman's orbit was calculated more precisely by additional observatories and thus it could be numbered as asteroid 7796. This is the 312th recognized (numbered) asteroid discovered at the Kleť Observatory, and Moravec suggested to name it after the fictional Czech genius 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."[2]

The IAU Committee on Small Body Nomenclature approved this name in 1998.

Physical characteristics[edit]

On the basis of its absolute magnitude in the visible light spectrum and albedo the diameter of the asteroid 7796 Járacimrman is estimated to be 12.54 km. No spectral data is available for the asteroid, thus neither its chemical nor mineralogical composition is currently known.

External links[edit]


  1. ^ "7796 Jaracimrman (1996 BG)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 13 April 2016. 
  2. ^ a b Schmadel, Lutz D. (2012). Dictionary of Minor Planet Names. Heidelberg: Springer Science & Business Media. p. 600. doi:10.1007/978-3-642-29718-2. ISBN 978-3-642-29717-5. Retrieved 2015-06-19.