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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394751827241753 3.072e-08  
a 2.442124133133223 9.9871e-09 au
q 2.101508423429349 7.3851e-08 au
i 7.078185439862006 3.205e-06 deg
node 123.4666256272561 4.0691e-05 deg
peri 191.0735214346944 4.4372e-05 deg
M 24.76065618526947 1.8644e-05 deg
tp 2458904.624050291600
(2020-Feb-25.12405029)
7.2131e-05 TDB
period 1393.959095298849
3.82
8.5509e-06
2.341e-08
d
yr
n .2582572194651235 1.5842e-09 deg/d
Q 2.782739842837098 1.138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1101  
   data-arc span      7971 days (21.82 yr)  
   first obs. used      1999-01-17  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54143  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:56:02  

Additional Information
 Earth MOID = 1.08797 au 
 Jupiter MOID = 2.47997 au 
 T_jup = 3.477 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457334.5 (2015-Nov-08.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1395021133551539 3.0766e-08  
q 2.101421049295964 7.4041e-08 au
tp 2457512.191467965101
(2016-May-03.69146797)
7.1978e-05 TDB
node 123.4988856981721 4.0723e-05 deg
peri 191.5294700513262 4.4408e-05 deg
i 7.075558009208746 3.2037e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1101  
   data-arc span      7971 days (21.82 yr)  
   first obs. used      1999-01-17  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54143  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:56:02  

Additional Information
 Jupiter MOID = 2.47997 au 
 T_jup = 3.477 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.46520808063178E-16 -2.26310751293734E-15 7.224497520121516E-13 9.304743028929683E-15 1.773954697336519E-13 6.249982461527596E-16
q -2.26310751293734E-15 5.48208307677607E-15 -1.791602698422655E-12 -2.181153539932373E-14 -4.419297522463382E-13 -1.471693401736564E-15
tp 7.224497520121516E-13 -1.791602698422655E-12 5.180843460433084E-9 1.745705692704462E-11 1.310317160083539E-9 4.721969762500429E-13
node 9.304743028929683E-15 -2.181153539932373E-14 1.745705692704462E-11 1.658347264773717E-9 -1.641215242837424E-9 1.706162368492056E-11
peri 1.773954697336519E-13 -4.419297522463382E-13 1.310317160083539E-9 -1.641215242837424E-9 1.972056480065481E-9 -1.681330900390027E-11
i 6.249982461527596E-16 -1.471693401736564E-15 4.721969762500429E-13 1.706162368492056E-11 -1.681330900390027E-11 1.026364093647097E-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 15.3   n/a MPO436178  

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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