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129440 (1981 DC1)
Classification: Main-belt Asteroid          SPK-ID: 2129440
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1709963278613796 3.663e-08  
a 2.563980147168648 1.2077e-08 au
q 2.125548957293329 9.34e-08 au
i 11.58197992023397 6.9381e-06 deg
node 211.1190386535159 1.9055e-05 deg
peri 50.69306265710821 3.0234e-05 deg
M 131.2980522367919 2.2683e-05 deg
tp 2458453.576988064627
(2018-Dec-01.07698806)
9.3085e-05 TDB
period 1499.582674247485
4.11
1.0595e-05
2.901e-08
d
yr
n .2400667907027226 1.6962e-09 deg/d
Q 3.002411337043966 1.4143e-08 au
  Orbit Determination Parameters
   # obs. used (total)      860  
   data-arc span      14229 days (38.96 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51348  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:04:25  

Additional Information
 Earth MOID = 1.1318 au 
 Jupiter MOID = 2.0895 au 
 T_jup = 3.384 
[ 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 15.3   n/a MPO493741  
diameter diameter 2.531 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.259   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129440 (1981 DC1)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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