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(2020 HD)
Classification: Amor [NEO]          SPK-ID: 54016543
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


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Orbital Elements at Epoch 2458957.5 (2020-Apr-18.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5347848953436566 0.001541  
a 2.35793106028046 0.0082955 au
q 1.096945144980817 0.00022581 au
i 4.251083037822308 0.0094792 deg
node 355.9263244956593 0.006482 deg
peri 222.2230260299724 0.010137 deg
M 356.8336264212743 0.015231 deg
tp 2458969.132009120840
(2020-Apr-29.63200912)
0.0058482 TDB
period 1322.49817634838
3.62
6.9791
0.01911
d
yr
n .2722120955917043 0.0014365 deg/d
Q 3.618916975580103 0.012732 au
  Orbit Determination Parameters
   # obs. used (total)      31  
   data-arc span      10 days  
   first obs. used      2020-04-16  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .53973  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-26 06:39:35  

Additional Information
 Earth MOID = .103789 au 
 Jupiter MOID = 1.38756 au 
 T_jup = 3.341 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 24.442   .4662 3 autocmod 2.8

[ hide close-approach data ]
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
2020-Apr-30 06:11 00:10 Earth 0.107037080400168 0.106241426424795 0.10783271902428 5.94160948847731 5.93741839645998 2458969.757756412 10.3819658581246 39624.1034249413 467.853964470229 -0.848089835299082 346.731939238688 T 3 CATAB v2.0f-lin.ifort 2020-Apr-26 06:39:47 2020-Apr-26 06:39
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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