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100540 (1997 EK20)
Classification: Main-belt Asteroid          SPK-ID: 2100540
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1653874554551669 4.4718e-08  
a 2.277333863295246 8.3783e-09 au
q 1.90069141042296 9.9726e-08 au
i 5.57352588414885 4.9955e-06 deg
node 254.3111474069948 5.1505e-05 deg
peri 69.27177888266247 5.463e-05 deg
M 113.4315224151494 1.7522e-05 deg
tp 2458604.978821481662
(2019-May-01.47882148)
6.0354e-05 TDB
period 1255.273853642512
3.44
6.9272e-06
1.897e-08
d
yr
n .2867900091723922 1.5826e-09 deg/d
Q 2.653976316167531 9.764e-09 au
  Orbit Determination Parameters
   # obs. used (total)      657  
   data-arc span      15057 days (41.22 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:07:25  

Additional Information
 Earth MOID = .896906 au 
 Jupiter MOID = 2.66104 au 
 T_jup = 3.584 
[ 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 16.0   n/a MPO253938  

100540 (1997 EK20)          Discovered 1997-Mar-04 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1997 EK20 = 1978 VA4 = 2002 VK105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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