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JPL Small-Body Database Browser
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20972 (1981 DX2)
Classification: Main-belt Asteroid          SPK-ID: 2020972
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05693641890347791 6.5612e-08  
a 2.98843329972602 2.316e-08 au
q 2.818282609507717 1.956e-07 au
i 7.948274534709495 5.1466e-06 deg
node 266.8570717414377 5.2476e-05 deg
peri 281.5540041263015 7.1123e-05 deg
M 126.8604441137082 4.9463e-05 deg
tp 2457935.552275570080
(2017-Jul-01.05227557)
0.00025771 TDB
period 1886.964707298421
5.17
2.1935e-05
6.005e-08
d
yr
n .1907825825292801 2.2178e-09 deg/d
Q 3.158583989944324 2.4478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      580  
   data-arc span      14173 days (38.80 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59649  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:48:03  

Additional Information
 Earth MOID = 1.8321 au 
 Jupiter MOID = 1.89757 au 
 T_jup = 3.240 
[ 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 14.7   n/a MPO400211  

20972 (1981 DX2)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
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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