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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163883257884573 5.9713e-08  
a 2.63711930857074 1.9923e-08 au
q 2.330189407341778 1.6143e-07 au
i 8.631249678576518 7.4129e-06 deg
node 302.3701409140023 3.5935e-05 deg
peri 266.1601257829873 4.8522e-05 deg
M 85.15473985956061 3.5012e-05 deg
tp 2458830.501962498482
(2019-Dec-13.00196250)		 0.00015048 TDB
period 1564.202928929409
4.28		 1.7726e-05
4.853e-08		 d
yr
n .2301491662890541 2.6081e-09 deg/d
Q 2.944049209799703 2.2242e-08 au
   Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      14353 days (39.30 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5619  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:08  

Additional Information
 Earth MOID = 1.34416 au 
 Jupiter MOID = 2.11659 au 
 T_jup = 3.371 
[ 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 15.71   n/a E2021B55  

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

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