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12781 (1995 EA8)
Classification: Main-belt Asteroid          SPK-ID: 2012781
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2113243960837867 3.3885e-08  
a 2.98872460001069 1.3982e-08 au
q 2.357134178852674 1.0306e-07 au
i .6577392025385665 4.7395e-06 deg
node 163.46087771561 0.00035959 deg
peri 285.0618517135333 0.0003598 deg
M 50.44806877956335 1.1212e-05 deg
tp 2458936.034321329215
(2020-Mar-27.53432133)
5.8404e-05 TDB
period 1887.240614452453
5.17
1.3243e-05
3.626e-08
d
yr
n .1907546908661921 1.3386e-09 deg/d
Q 3.620315021168707 1.6937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1288  
   data-arc span      9508 days (26.03 yr)  
   first obs. used      1995-03-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47445  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:17:44  

Additional Information
 Earth MOID = 1.3734 au 
 Jupiter MOID = 1.60395 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 14.59   n/a MPCxxxxx  
diameter diameter 6.727 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12781 (1995 EA8)          Discovered 1995-Mar-12 by Sarounova, L. at Ondrejov
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1995 EA8 = 1998 SK143 = 1998 SO111 = 1999 UE36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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