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56516 (2000 HE20)
Classification: Main-belt Asteroid          SPK-ID: 2056516
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1393846717195742 2.9146e-08  
a 2.442113995982759 9.6339e-09 au
q 2.101720738350924 6.9317e-08 au
i 7.07819474966735 2.9172e-06 deg
node 123.466974087961 3.9807e-05 deg
peri 191.1029892167927 4.36e-05 deg
M 76.39499014595837 1.8606e-05 deg
tp 2458904.692143645477
(2020-Feb-25.19214365)
7.1883e-05 TDB
period 1393.950415913001
3.82
8.2485e-06
2.258e-08
d
yr
n .2582588274951009 1.5282e-09 deg/d
Q 2.782507253614593 1.0977e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1184  
   data-arc span      8051 days (22.04 yr)  
   first obs. used      1999-01-17  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52938  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:18:06  

Additional Information
 Earth MOID = 1.0862 au 
 Jupiter MOID = 2.47976 au 
 T_jup = 3.477 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457612.5 (2016-Aug-12.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396609001575528 2.9168e-08  
q 2.101450690318541 6.9475e-08 au
tp 2457512.084910027908
(2016-May-03.58491003)
7.1752e-05 TDB
node 123.4984211564126 3.9841e-05 deg
peri 191.4939142857179 4.3629e-05 deg
i 7.075171534807934 2.9158e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1184  
   data-arc span      8051 days (22.04 yr)  
   first obs. used      1999-01-17  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52938  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:18:06  

Additional Information
 Jupiter MOID = 2.47976 au 
 T_jup = 3.477 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.507995787289365E-16 -2.012980200393298E-15 7.21937896707151E-13 6.484966282872139E-15 1.725632474591611E-13 1.097638032994507E-16
q -2.012980200393298E-15 4.826812991853635E-15 -1.794706274222757E-12 -1.472708832678099E-14 -4.295452000311945E-13 -1.967276971923177E-16
tp 7.21937896707151E-13 -1.794706274222757E-12 5.148388092082895E-9 1.075971750768489E-11 1.310169797208613E-9 -1.047326957244303E-12
node 6.484966282872139E-15 -1.472708832678099E-14 1.075971750768489E-11 1.58727256495793E-9 -1.572502935633862E-9 6.667015960942579E-12
peri 1.725632474591611E-13 -4.295452000311945E-13 1.310169797208613E-9 -1.572502935633862E-9 1.903493283351627E-9 -6.90249589267699E-12
i 1.097638032994507E-16 -1.967276971923177E-16 -1.047326957244303E-12 6.667015960942579E-12 -6.90249589267699E-12 8.502041071101845E-12

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 15.39   n/a E2021B10  

56516 (2000 HE20)          Discovered 2000-Apr-27 by Spacewatch at Kitt Peak
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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