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37542 (1981 EJ8)
Classification: Main-belt Asteroid          SPK-ID: 2037542
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.


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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 .1614139183448587 4.8844e-08  
a 3.031135330277287 2.2383e-08 au
q 2.541867899583693 1.5328e-07 au
i 2.900738720478905 5.5762e-06 deg
node 247.7079624559654 0.00010867 deg
peri 237.428897357335 0.00011057 deg
M 195.3815539666491 1.9228e-05 deg
tp 2459881.919011707536
(2022-Oct-29.41901171)
0.00010618 TDB
period 1927.553393077391
5.28
2.1351e-05
5.846e-08
d
yr
n .1867652544893972 2.0687e-09 deg/d
Q 3.520402760970881 2.5996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      13631 days (37.32 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-06-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56233  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 19:24:50  

Additional Information
 Earth MOID = 1.55881 au 
 Jupiter MOID = 1.57058 au 
 T_jup = 3.221 
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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 15.0   n/a MPO395358  
diameter diameter 5.442 km 1.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37542 (1981 EJ8)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 EJ8 = 1997 GQ44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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