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39482 (1981 DD2)
Classification: Main-belt Asteroid          SPK-ID: 2039482
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08308024270866542 5.7906e-08  
a 3.038283756884015 2.728e-08 au
q 2.785862404944295 1.7697e-07 au
i 7.689144740887138 4.8257e-06 deg
node 267.4626600989899 4.613e-05 deg
peri 252.7457052717637 5.5329e-05 deg
M 163.2118726061665 3.1758e-05 deg
tp 2458123.519025934817
(2018-Jan-05.01902593)
0.00016734 TDB
period 1934.37613098949
5.30
2.6053e-05
7.133e-08
d
yr
n .1861065147737578 2.5065e-09 deg/d
Q 3.290705108823734 2.9547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      509  
   data-arc span      13582 days (37.19 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61361  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 19:33:13  

Additional Information
 Earth MOID = 1.80735 au 
 Jupiter MOID = 1.7977 au 
 T_jup = 3.222 
[ 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 14.8   n/a MPO436046  
diameter diameter 7.577 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39482 (1981 DD2)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 DD2 = 2000 WX84 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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