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JPL Small-Body Database Browser
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20970 (1981 DD1)
Classification: Main-belt Asteroid          SPK-ID: 2020970
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217947938850278 1.1354e-07  
a 2.532775052530137 1.1841e-08 au
q 2.224296237050089 2.8861e-07 au
i 14.51695500647078 1.0175e-05 deg
node 332.065893445162 1.4573e-05 deg
peri 127.070787633432 0.00011573 deg
M 233.1076124436806 0.00010527 deg
tp 2459119.451085576975
(2020-Sep-26.95108558)
0.00043052 TDB
period 1472.289980553738
4.03
1.0324e-05
2.827e-08
d
yr
n .2445170481052935 1.7147e-09 deg/d
Q 2.841253868010186 1.3283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1057  
   data-arc span      14166 days (38.78 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-11-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49308  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:48:03  

Additional Information
 Earth MOID = 1.27002 au 
 Jupiter MOID = 2.30067 au 
 T_jup = 3.395 
[ 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 14.9   n/a MPO395204  

20970 (1981 DD1)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 DD1 = 1999 RE207 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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