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100198 (1994 EA1)
Classification: Main-belt Asteroid          SPK-ID: 2100198
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2460002674946705 3.6856e-08  
a 3.137659849525057 1.8245e-08 au
q 2.365794687234605 1.1963e-07 au
i 15.80357507614878 4.1557e-06 deg
node 353.4601558120771 1.5387e-05 deg
peri 84.38000693152368 2.1113e-05 deg
M 348.4945988903791 1.0039e-05 deg
tp 2459265.379348570828
(2021-Feb-19.87934857)
5.6504e-05 TDB
period 2030.052256584702
5.56
1.7707e-05
4.848e-08
d
yr
n .1773353364832357 1.5468e-09 deg/d
Q 3.909525011815508 2.2733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      9835 days (26.93 yr)  
   first obs. used      1994-03-09  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46652  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:04  

Additional Information
 Earth MOID = 1.44212 au 
 Jupiter MOID = 1.76149 au 
 T_jup = 3.107 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458167.5 (2018-Feb-18.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .243936670760437 3.6726e-08  
q 2.375486209517311 1.191e-07 au
tp 2457232.719256449268
(2015-Jul-29.21925645)
6.4919e-05 TDB
node 353.5787397813889 1.5374e-05 deg
peri 84.13657852043656 2.1273e-05 deg
i 15.79661083082712 4.1582e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      9835 days (26.93 yr)  
   first obs. used      1994-03-09  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46652  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:04  

Additional Information
 Jupiter MOID = 1.76149 au 
 T_jup = 3.107 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.348798981954514E-15 -4.342941064868991E-15 -4.160386951571132E-13 6.529899747478818E-15 -8.564424379176012E-14 -1.477226246193843E-14
q -4.342941064868991E-15 1.418467897521969E-14 7.980806456462834E-13 -1.979786050844877E-14 1.72037295748882E-13 5.038814448029625E-14
tp -4.160386951571132E-13 7.980806456462834E-13 4.214510974469236E-9 -1.665782316169932E-11 9.684025217755785E-10 5.762852666820561E-12
node 6.529899747478818E-15 -1.979786050844877E-14 -1.665782316169932E-11 2.363499257110528E-10 -2.31324231733764E-10 2.505590805788147E-11
peri -8.564424379176012E-14 1.72037295748882E-13 9.684025217755785E-10 -2.31324231733764E-10 4.525369820578308E-10 -2.244335450580193E-11
i -1.477226246193843E-14 5.038814448029625E-14 5.762852666820561E-12 2.505590805788147E-11 -2.244335450580193E-11 1.729080431750406E-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 15.01   n/a E2021B55  
diameter diameter 2.926 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.298   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100198 (1994 EA1)          Discovered 1994-Mar-09 by Vagnozzi, A. at Stroncone
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1994 EA1 = 2003 SL105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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