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16913 (1998 EK9)
Classification: Main-belt Asteroid          SPK-ID: 2016913
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132075992067215 1.1559e-08  
a 2.384738670047807 9.7513e-09 au
q 2.069771944380192 2.7334e-08 au
i 25.8914615032882 4.5864e-07 deg
node 125.3369951342017 1.4719e-06 deg
peri 297.5377992317916 1.0198e-05 deg
M 118.7022123126735 8.0235e-06 deg
tp 2458756.977220289726
(2019-Sep-30.47722029)
2.9628e-05 TDB
period 1345.115626616264
3.68
8.2504e-06
2.259e-08
d
yr
n .267634984589099 1.6416e-09 deg/d
Q 2.699705395715422 1.1039e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2086  
   data-arc span      12466 days (34.13 yr)  
   first obs. used      1987-01-22  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:46:23  

Additional Information
 Earth MOID = 1.16811 au 
 Jupiter MOID = 2.59672 au 
 T_jup = 3.389 
[ 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 13.33   n/a E2021B10  
diameter diameter 11.770 km 0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16913 (1998 EK9)          Discovered 1998-Mar-11 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 EK9 = 1987 BA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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