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120442 (1981 DW)
Classification: Main-belt Asteroid          SPK-ID: 2120442
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1158154267738954 6.2772e-08  
a 2.635773783311864 2.0119e-08 au
q 2.330510517718156 1.7017e-07 au
i 8.631031353191194 7.5188e-06 deg
node 302.3719755312362 3.6291e-05 deg
peri 266.0164845480397 4.9532e-05 deg
M 39.29848213734912 3.6577e-05 deg
tp 2458829.878441896845
(2019-Dec-12.37844190)
0.00015797 TDB
period 1563.005937543806
4.28
1.7895e-05
4.899e-08
d
yr
n .2303254206223451 2.6371e-09 deg/d
Q 2.941037048905573 2.2449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      414  
   data-arc span      13932 days (38.14 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55114  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:48:59  

Additional Information
 Earth MOID = 1.3454 au 
 Jupiter MOID = 2.12026 au 
 T_jup = 3.372 
[ 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 15.7   n/a MPO338103  

120442 (1981 DW)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1981 DW = 2002 AZ130 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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