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39483 (1981 DW2)
Classification: Main-belt Asteroid          SPK-ID: 2039483
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1161915477633828 4.4123e-08  
a 2.307224293787553 9.2081e-09 au
q 2.039144332055099 1.0182e-07 au
i 5.93075160640445 3.8093e-06 deg
node 257.5022011778446 4.9984e-05 deg
peri 55.42760896847584 5.3399e-05 deg
M 305.975043873475 1.9421e-05 deg
tp 2459192.598986199486
(2020-Dec-09.09898620)
6.9354e-05 TDB
period 1280.068323791961
3.50
7.6631e-06
2.098e-08
d
yr
n .2812349882493521 1.6836e-09 deg/d
Q 2.575304255520006 1.0278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      14232 days (38.97 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50119  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:27:34  

Additional Information
 Earth MOID = 1.03164 au 
 Jupiter MOID = 2.64614 au 
 T_jup = 3.571 
[ 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 15.6   n/a MPO381561  
diameter diameter 1.627 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.421   0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39483 (1981 DW2)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 DW2 = 1999 LO18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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