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35021 (1981 ER12)
Classification: Main-belt Asteroid          SPK-ID: 2035021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09374884537763903 4.5709e-08  
a 3.088789485417257 2.9819e-08 au
q 2.799219037544797 1.451e-07 au
i 11.10614134733551 6.7425e-06 deg
node 338.9801027469922 2.2869e-05 deg
peri 245.6448176678738 4.1294e-05 deg
M 327.8618044133104 3.425e-05 deg
tp 2458777.510847290681
(2019-Oct-21.01084729)
0.00018856 TDB
period 1982.809048901216
5.43
2.8713e-05
7.861e-08
d
yr
n .1815605996954149 2.6292e-09 deg/d
Q 3.378359933289717 3.2615e-08 au
  Orbit Determination Parameters
   # obs. used (total)      510  
   data-arc span      13933 days (38.15 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56539  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:44:56  

Additional Information
 Earth MOID = 1.81481 au 
 Jupiter MOID = 1.71195 au 
 T_jup = 3.190 
[ 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 MPO431894  
diameter diameter 4.108 km 1.432 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.138   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

35021 (1981 ER12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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