Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05654911012534703 5.6381e-08  
a 2.989531738716634 2.1163e-08 au
q 2.820476379200727 1.7268e-07 au
i 7.947784198420967 4.9278e-06 deg
node 266.8609302544932 3.9795e-05 deg
peri 281.1537730533016 6.057e-05 deg
M 241.7385325736274 4.8185e-05 deg
tp 2459820.717394829402
(2022-Aug-29.21739483)
0.00025537 TDB
period 1888.005171909384
5.17
2.0048e-05
5.489e-08
d
yr
n .1906774437677645 2.0248e-09 deg/d
Q 3.158587098232541 2.236e-08 au
  Orbit Determination Parameters
   # obs. used (total)      735  
   data-arc span      14611 days (40.00 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55791  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:29  

Additional Information
 Earth MOID = 1.83344 au 
 Jupiter MOID = 1.89574 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 15:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin