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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 
[ 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 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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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
2086-Jul-14 13:03 00:08 Europ 0.0496305212593452 0.0496232161458411 0.0496378271309235 2.63643942562214 2.63643934439426 2483151.043984884 8.35281295058688 477.959483101628 60.397284318523 -40.8071843271644 81067.3871508757 T 18 CATAB v2.0f-lin.ifort 2020-Dec-18 03:56:04 2020-Dec-18 03:56
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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