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JPL Small-Body Database Browser
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39507 (1981 EC45)
Classification: Main-belt Asteroid          SPK-ID: 2039507
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183559054758008 4.8801e-08  
a 2.983007677780219 2.0546e-08 au
q 2.629951103035276 1.5236e-07 au
i 11.49823385463519 4.7463e-06 deg
node 199.288361437032 2.3705e-05 deg
peri 199.6153845371501 3.2806e-05 deg
M 274.9803044367925 2.4354e-05 deg
tp 2459044.923513401265
(2020-Jul-14.42351340)
0.00012868 TDB
period 1881.828248908626
5.15
1.9442e-05
5.323e-08
d
yr
n .1913033244180405 1.9764e-09 deg/d
Q 3.336064252525163 2.2978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      587  
   data-arc span      14134 days (38.70 yr)  
   first obs. used      1981-03-07  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54665  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:09:44  

Additional Information
 Earth MOID = 1.639 au 
 Jupiter MOID = 2.10418 au 
 T_jup = 3.218 
[ 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 14.7   n/a MPO439361  

39507 (1981 EC45)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EC45 = 1999 VV184 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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