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46536 (1981 EJ40)
Classification: Main-belt Asteroid          SPK-ID: 2046536
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3234742537804862 1.1343e-07  
a 2.782965424426039 1.5718e-08 au
q 1.882747760462932 3.1262e-07 au
i 32.60041191743125 1.2965e-05 deg
node 346.1401272262419 1.3267e-05 deg
peri 57.20169727202482 2.7037e-05 deg
M 274.8892607503552 1.429e-05 deg
tp 2459401.405491218034
(2021-Jul-05.90549122)
6.748e-05 TDB
period 1695.743429218242
4.64
1.4366e-05
3.933e-08
d
yr
n .2122962671103872 1.7985e-09 deg/d
Q 3.683183088389145 2.0802e-08 au
  Orbit Determination Parameters
   # obs. used (total)      525  
   data-arc span      13560 days (37.13 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56049  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Apr-05 13:41:59  

Additional Information
 Earth MOID = 1.00768 au 
 Jupiter MOID = 2.27957 au 
 T_jup = 3.036 
[ 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 14.3   n/a MPO395442  
diameter diameter 4.786 km 0.987 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.077   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

46536 (1981 EJ40)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EJ40 = 1988 RH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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