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39487 (1981 EC6)
Classification: Main-belt Asteroid          SPK-ID: 2039487
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2303449205722115 4.2466e-08  
a 2.404510593770812 2.0568e-08 au
q 1.850643792033633 1.0856e-07 au
i 8.906850216640521 4.5682e-06 deg
node 304.3681984928486 3.7577e-05 deg
peri 17.34858005076585 3.9821e-05 deg
M 315.8482563428504 1.8237e-05 deg
tp 2458767.525902820407
(2019-Oct-11.02590282)
7.0334e-05 TDB
period 1361.878830477618
3.73
1.7474e-05
4.784e-08
d
yr
n .2643406975301511 3.3917e-09 deg/d
Q 2.958377395507991 2.5306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      13962 days (38.23 yr)  
   first obs. used      1981-02-14  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55954  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:09:22  

Additional Information
 Earth MOID = .83885 au 
 Jupiter MOID = 2.36554 au 
 T_jup = 3.471 
[ 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 15.1   n/a MPO436046  
diameter diameter 4.722 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39487 (1981 EC6)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EC6 = 2001 VW14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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