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21663 Banat (1999 RM)
Classification: Main-belt Asteroid          SPK-ID: 2021663
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1375099564947959 4.6119e-08  
a 3.053375978926747 2.3131e-08 au
q 2.633506380902275 1.4159e-07 au
i 9.29154574857241 5.7404e-06 deg
node 170.8656219038263 3.1539e-05 deg
peri 146.3754600230671 3.8707e-05 deg
M 96.00565600595898 2.1227e-05 deg
tp 2457080.787487934774
0.00011524 JED
period 1948.80710290515
n .1847283907490569 2.0992e-09 deg/d
Q 3.473245576951219 2.6312e-08 au
  Orbit Determination Parameters
   # obs. used (total)      912  
   data-arc span      23939 days (65.54 yr)  
   first obs. used      1950-06-19  
   last obs. used      2016-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56004  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:33:58  

Additional Information
 Earth MOID = 1.62617 au 
 Jupiter MOID = 1.89763 au 
 T_jup = 3.202 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO358835  
rotation period rot_per 9.6 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site,]

21663 Banat           Discovered 1999 Sept. 3 at the Starkenburg Observatory, Heppenheim.
The Banat, home of the "Donauschwaben", is a European region between the Maros river in the north, the Transylvanian Alps in the east, the Danube river in the south and Tisza river in the west. Since the Treaty of Trianon in 1920 the Banat has been divided between western Romania, northern Yugoslavia and eastern Hungary.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 RM = 1998 KQ61 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-03 08:44 UT
(server date/time)  
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