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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034131944311406 5.2138e-08  
a 2.417796648233442 8.8119e-09 au
q 2.167764573354717 1.2697e-07 au
i 5.482085362554759 3.4101e-06 deg
node 241.416806980339 4.7203e-05 deg
peri 298.2260335741317 5.0789e-05 deg
M 59.50577194769605 1.7223e-05 deg
tp 2458973.521523635819
(2020-May-04.02152364)
6.598e-05 TDB
period 1373.181942130389
3.76
7.5071e-06
2.055e-08
d
yr
n .2621648224134721 1.4332e-09 deg/d
Q 2.667828723112166 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49449  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:10:38  

Additional Information
 Earth MOID = 1.17616 au 
 Jupiter MOID = 2.31814 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457147.5 (2015-May-05.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041017519509754 5.2128e-08  
q 2.1659027793084 1.2712e-07 au
tp 2457601.001610476829
(2016-Jul-31.50161048)
6.7693e-05 TDB
node 241.4674061155272 4.723e-05 deg
peri 298.4444310328503 5.077e-05 deg
i 5.480516534069475 3.4093e-06 deg
  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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49449  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:10:38  

Additional Information
 Jupiter MOID = 2.31814 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.717302941857508E-15 -6.613439550691288E-15 -3.962400415746346E-13 2.515508168721881E-14 -6.44460094512898E-15 -4.42981798714713E-15
q -6.613439550691288E-15 1.615869254675592E-14 7.74995960398565E-13 -5.949953577990668E-14 -4.282942741486867E-14 1.071480004275721E-14
tp -3.962400415746346E-13 7.74995960398565E-13 4.582294750292014E-9 -2.144706291503323E-11 1.276705086758972E-9 3.611902870159125E-12
node 2.515508168721881E-14 -5.949953577990668E-14 -2.144706291503323E-11 2.230708076764367E-9 -2.225151947043411E-9 -2.065349015167423E-11
peri -6.44460094512898E-15 -4.282942741486867E-14 1.276705086758972E-9 -2.225151947043411E-9 2.577604751558483E-9 2.134112951838249E-11
i -4.42981798714713E-15 1.071480004275721E-14 3.611902870159125E-12 -2.065349015167423E-11 2.134112951838249E-11 1.162360402371354E-11

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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