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18772 (1999 JR34)
Classification: Main-belt Asteroid          SPK-ID: 2018772
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1343236494980405 3.6314e-08  
a 2.166338213083842 4.9713e-09 au
q 1.875347758255357 7.7678e-08 au
i 2.835925274430085 3.6102e-06 deg
node 1.218142026384154 6.7416e-05 deg
peri 7.179206100396704 6.8464e-05 deg
M 149.6268108161673 1.2533e-05 deg
tp 2458716.444971292682
(2019-Aug-20.94497129)		 4.0099e-05 TDB
period 1164.629583322012
3.19		 4.0089e-06
1.098e-08		 d
yr
n .3091111587369514 1.064e-09 deg/d
Q 2.457328667912328 5.639e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2004  
   data-arc span      12233 days (33.49 yr)  
   first obs. used      1987-09-17  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49207  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:37:34  

Additional Information
 Earth MOID = .872718 au 
 Jupiter MOID = 3.00301 au 
 T_jup = 3.679 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.77   n/a E2021B10  

18772 (1999 JR34)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JR34 = 1987 SQ20 = 1987 UH7 = 1990 RL10 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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