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27683 (1981 ED20)
Classification: Main-belt Asteroid          SPK-ID: 2027683
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2001085496312913 3.2935e-08  
a 2.381180575430454 9.9861e-09 au
q 1.904685984070862 8.0261e-08 au
i 4.876526636362094 5.8075e-06 deg
node 7.331601012795821 4.4832e-05 deg
peri 76.45477379454371 4.7518e-05 deg
M 203.0476149672065 1.5936e-05 deg
tp 2459185.629969173770
(2020-Dec-02.12996917)
6.1021e-05 TDB
period 1342.106326441264
3.67
8.4427e-06
2.311e-08
d
yr
n .2682350816083088 1.6874e-09 deg/d
Q 2.857675166790046 1.1984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      15559 days (42.60 yr)  
   first obs. used      1977-01-13  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56721  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:44:52  

Additional Information
 Earth MOID = .927565 au 
 Jupiter MOID = 2.39202 au 
 T_jup = 3.506 
[ show covariance matrix ]

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 15.2   n/a MPO435956  
diameter diameter 5.078 km 0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27683 (1981 ED20)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 ED20 = 1977 AH2 = 1998 XF52 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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