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21734 (1999 RM146)
Classification: Main-belt Asteroid          SPK-ID: 2021734
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044209700112638 4.1962e-08  
a 2.977101367322315 1.4277e-08 au
q 2.666229554724659 1.2275e-07 au
i 10.555827432811 4.0752e-06 deg
node 182.4866305938488 1.7553e-05 deg
peri 200.5893024523474 2.4632e-05 deg
M 17.28212798930726 1.5169e-05 deg
tp 2459110.429291998654
(2020-Sep-17.92929200)
7.9262e-05 TDB
period 1876.242028791052
5.14
1.3497e-05
3.695e-08
d
yr
n .1918729004444935 1.3803e-09 deg/d
Q 3.28797317991997 1.5768e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1854  
   data-arc span      8734 days (23.91 yr)  
   first obs. used      1997-03-05  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4791  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:52:24  

Additional Information
 Earth MOID = 1.66989 au 
 Jupiter MOID = 2.17901 au 
 T_jup = 3.227 
[ 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 13.65   n/a E2021B10  

21734 (1999 RM146)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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