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172851 (2005 EF28)
Classification: Main-belt Asteroid          SPK-ID: 2172851
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1030443706960221 6.0398e-08  
a 2.309298795373453 1.5552e-08 au
q 2.071338554255113 1.4268e-07 au
i 3.43854621542636 6.0243e-06 deg
node 31.71610140815595 9.6487e-05 deg
peri 189.3937773533465 0.00010237 deg
M 82.27933585243896 3.819e-05 deg
tp 2458707.540964534816
(2019-Aug-12.04096453)
0.00013489 TDB
period 1281.795139384808
3.51
1.2948e-05
3.545e-08
d
yr
n .2808561126021905 2.8372e-09 deg/d
Q 2.547259036491792 1.7155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-03-02  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60873  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 02:48:13  

Additional Information
 Earth MOID = 1.06311 au 
 Jupiter MOID = 2.42363 au 
 T_jup = 3.576 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456749.5 (2014-Apr-02.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103208811762331 6.0263e-08  
q 2.070182057832707 1.4205e-07 au
tp 2456144.471816451069
(2012-Aug-04.97181645)
0.00012781 TDB
node 31.79353528314796 9.6444e-05 deg
peri 189.3490275231447 0.00010229 deg
i 3.439899726457269 6.0238e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-03-02  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60873  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 02:48:13  

Additional Information
 Jupiter MOID = 2.42363 au 
 T_jup = 3.576 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.631678682628219E-15 -8.521813680427422E-15 -4.55296017709335E-12 -2.925659536277895E-14 -1.139138655502198E-12 -1.36101444704592E-16
q -8.521813680427422E-15 2.017945175874066E-14 1.080280741062422E-11 6.684406186127109E-14 2.722519751362677E-12 6.033182263386429E-16
tp -4.55296017709335E-12 1.080280741062422E-11 1.63344626114771E-8 1.603990884872244E-11 4.383011476079655E-9 3.777948170465628E-12
node -2.925659536277895E-14 6.684406186127109E-14 1.603990884872244E-11 9.301411252857288E-9 -9.280510717211155E-9 -2.29919454315877E-10
peri -1.139138655502198E-12 2.722519751362677E-12 4.383011476079655E-9 -9.280510717211155E-9 1.046236770017377E-8 2.305933128023457E-10
i -1.36101444704592E-16 6.033182263386429E-16 3.777948170465628E-12 -2.29919454315877E-10 2.305933128023457E-10 3.628566241053976E-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 16.9   n/a MPO433109  

172851 (2005 EF28)          Discovered 2005-Mar-03 by CSS at Catalina
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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