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7846 Setvak (1996 BJ)
Classification: Main-belt Asteroid          SPK-ID: 2007846
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1791701004943442 3.9948e-08  
a 2.349245448936596 8.8553e-09 au
q 1.928330905764746 9.2653e-08 au
i 3.457017501799199 4.3835e-06 deg
node 291.2672849081388 6.3057e-05 deg
peri 223.9703557727347 6.3904e-05 deg
M 251.6870287287648 1.1864e-05 deg
tp 2459396.202675833532
4.4442e-05 TDB
period 1315.197631716182
n .273723120631111 1.5477e-09 deg/d
Q 2.770159992108447 1.0442e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1469  
   data-arc span      14735 days (40.34 yr)  
   first obs. used      1979-07-24  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51587  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:39:33  

Additional Information
 Earth MOID = .94016 au 
 Jupiter MOID = 2.23388 au 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO344365  
diameter diameter 2.964 km 0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 2.613 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.349   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7846 Setvák           Discovered 1996 Jan. 16 by M. Tichy at Klet.
Named in honor of Martin Setvák (b. 1958), meteorologist and head of the Satellite Department of the Czech Hydrometeorological Institute in Prague, on the occasion of his 40th birthday, 1998 Feb. 14. His main professional interest is in convective storms, but his long-time hobby is astrophotography. This minor planet also honors his wife Stáňa Setváková (b. 1967), a staff member of the Prague Planetarium. Name proposed by the discoverer and J. Ticha.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980211/MPCPages.arcLast Updated: 2009-11-17

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1921-Jul-02 04:11 < 00:01 Thisb 0.0235180622548176 0.0235119723740118 0.0235241536196905 5.60819366907187 5.60819361737667 2422872.674363513 0.481261591821772 424.701108173891 38.9256217970909 -44.6016827847506 63717.9852301299 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 18:39:48 2020-Feb-22 18:39
1929-Jan-11 16:18 < 00:01 Eunom 0.0201484548459704 0.020144457621971 0.0201524537519351 6.49029798441838 6.49029787707198 2425623.179390149 0.199363869160524 356.236641741802 36.8480891023319 -56.4430075114926 68296.8876804083 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 18:39:48 2020-Feb-22 18:39
2174-Feb-04 15:34 < 00:01 Eunom 0.0276820508776081 0.0276736418580516 0.027690466119218 6.32912367841326 6.32912359829121 2515132.148760966 0.201807772692502 779.117210455966 36.6643348537784 -57.5413065425308 95303.477846364 T 26 CATAB v2.0f-lin.ifort 2020-Feb-22 18:39:48 2020-Feb-22 18:39

Alternate Designations
 1996 BJ = 1979 OZ2 
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