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19984 (1990 EP2)
Classification: Main-belt Asteroid          SPK-ID: 2019984
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034131944768723 5.2138e-08  
a 2.417796648317823 8.8119e-09 au
q 2.167764573319802 1.2697e-07 au
i 5.482085363526153 3.4101e-06 deg
node 241.4168068933061 4.7203e-05 deg
peri 298.2260336468811 5.0789e-05 deg
M 59.50577196535902 1.7223e-05 deg
tp 2458973.521523556563
(2020-May-04.02152356)
6.598e-05 TDB
period 1373.181942202275
3.76
7.5071e-06
2.055e-08
d
yr
n .2621648223997477 1.4332e-09 deg/d
Q 2.667828723315844 9.7232e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1501  
   data-arc span      11094 days (30.37 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4945  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:28  

Additional Information
 Earth MOID = 1.17616 au 
 Jupiter MOID = 2.31814 au 
 T_jup = 3.502 
[ 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 14.58   n/a E2021B10  
diameter diameter 2.874 km 0.667 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.372   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19984 (1990 EP2)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EP2 = 1992 WK10 = 1998 KC47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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