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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 
[ 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2153-Apr-18 18:00 < 00:01 Juno 0.0413534397141005 0.0413355126811129 0.0413713702087663 7.44312526069058 7.44312522116494 2507535.250130494 0.447429718558372 1075.20479727402 55.5256062471072 33.819897202571 62176.2399164682 T 30 CATAB v2.0f-lin.ifort 2021-Apr-13 03:10:46 2021-Apr-13 03:10

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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