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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09476803888894764 4.5696e-08  
a 3.092234172856652 2.9439e-08 au
q 2.79918920450964 1.4505e-07 au
i 11.10604155269384 6.7422e-06 deg
node 338.9369873664955 2.2859e-05 deg
peri 245.8535781740013 4.1011e-05 deg
M 40.27344835198335 3.3885e-05 deg
tp 2458778.310615401445
(2019-Oct-21.81061540)
0.00018708 TDB
period 1986.12688331022
5.44
2.8363e-05
7.765e-08
d
yr
n .1812573018497179 2.5884e-09 deg/d
Q 3.385279141203664 3.2229e-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 = 1.8147 au 
 Jupiter MOID = 1.7057 au 
 T_jup = 3.189 
[ 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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