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(2020 HL)
Classification: Apollo [NEO]          SPK-ID: 54016550
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 2458960.5 (2020-Apr-21.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4036965259238703 0.0018016  
a 1.521565698961727 0.0039983 au
q .9073149123259523 0.00035706 au
i 5.014517214450485 0.020404 deg
node 18.82414703758549 0.0019318 deg
peri 255.4255000920177 0.008059 deg
M 331.376509858287 0.12848 deg
tp 2459015.007288389758
(2020-Jun-14.50728839)
0.029812 TDB
period 685.5426687368508
1.88
2.7022
0.007398
d
yr
n .5251314271412446 0.0020699 deg/d
Q 2.135816485597501 0.0056125 au
  Orbit Determination Parameters
   # obs. used (total)      30  
   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      .68589  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-22 06:33:15  

Additional Information
 Earth MOID = .0372212 au 
 Jupiter MOID = 3.00874 au 
 T_jup = 4.405 
[ 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 25.048   .4213 5 autocmod 2.8

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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
2017-Jan-01 22:14 4_09:54 Mars 0.0896479895864866 0.0213668409275335 0.326406593293498 7.76292546300371 7.76251407490507 2457755.426238595 6354.15862426017 11900215.0363406 114.800917584118 13.7913874192131 29059.0748278016 T 5 CATAB v2.0f-lin.ifort 2020-Aug-22 06:33:17 2020-Aug-22 06:33
2018-Sep-12 21:57 7_02:08 Earth 0.363995914008051 0.226476590232537 0.503691215105299 20.1000814426403 20.0997172577147 2458374.414275024 10208.3375272549 7053032.70755227 487.828485941587 10.6159452172348 18350.9047336212 T 5 CATAB v2.0f-lin.ifort 2020-Aug-22 06:33:17 2020-Aug-22 06:33
2020-May-05 15:25 00:01 Earth 0.0429690723767161 0.0424517426871733 0.0434863841032075 9.16185059676157 9.15507989511516 2458975.142181432 1.29087070105382 25759.4367530684 38.377025779276 -0.331367458457769 380.055891742 T 5 CATAB v2.0f-lin.ifort 2020-Aug-22 06:33:17 2020-Aug-22 06:33
2020-Sep-13 22:13 15:10 Earth 0.451637319510227 0.446466999954511 0.456807944963248 4.36266429104594 4.3613117885815 2459106.425492682 909.924586243543 258496.209778682 456.685777819106 3.60387858826804 17396.8924053048 T 5 CATAB v2.0f-lin.ifort 2020-Aug-22 06:33:17 2020-Aug-22 06:33
2181-May-12 21:20 4_11:25 Mars 0.0543510961372175 0.0538563543299762 0.156990127481271 9.39042771287536 9.38986676116376 2517786.388791270 6445.44293067161 6994275.63066558 797.55535339101 -82.390348761877 10111.5700647322 T 5 CATAB v2.0f-lin.ifort 2020-Aug-22 06:33:17 2020-Aug-22 06:33
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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