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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3232221460633933 1.0735e-07  
a 2.782363107697622 1.5887e-08 au
q 1.883041732899984 2.952e-07 au
i 32.61502114986456 1.2749e-05 deg
node 346.11220613953 1.2836e-05 deg
peri 57.23898834187992 2.4964e-05 deg
M 317.3131746754201 1.3524e-05 deg
tp 2459401.506680908062
(2021-Jul-06.00668091)
6.378e-05 TDB
period 1695.192944817908
4.64
1.4519e-05
3.975e-08
d
yr
n .2123652066276561 1.8189e-09 deg/d
Q 3.681684482495259 2.1022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      555  
   data-arc span      14456 days (39.58 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-09-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56754  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:49:49  

Additional Information
 Earth MOID = 1.00684 au 
 Jupiter MOID = 2.282 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 14.28   n/a E2021B10  
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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