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(2020 UN4)
Classification: Apollo [NEO]          SPK-ID: 54076021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4948953194210144 0.00052569  
a 1.890810130044253 0.0019125 au
q .9550570467715126 4.1519e-05 au
i 2.155932731401415 0.0020303 deg
node 213.9588755228386 0.00085726 deg
peri 142.8204270679106 0.01011 deg
M 30.82029776885062 0.048567 deg
tp 2459119.197362046345
(2020-Sep-26.69736205)
0.0080249 TDB
period 949.6647268897357
2.60
1.4408
0.003945
d
yr
n .3790811533866721 0.00057514 deg/d
Q 2.826563213316993 0.002859 au
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      1 day  
   first obs. used      2020-10-23  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .62918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 20:42:13  

Additional Information
 Earth MOID = .00524431 au 
 Jupiter MOID = 2.63079 au 
 T_jup = 3.799 
[ 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 28.00   .34702 E2020-UK5 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
1953-Jul-13 12:40 2_03:55 Earth 0.334797375273209 0.296236435017471 0.373420007170773 18.8523526677372 18.8519305149906 2434572.027777328 3114.70205694282 1937715.45685433 5625.06075876304 -6.68303391293313 928.611297108852 T 1 CATAB v2.0f-lin.ifort 2020-Oct-23 20:42:15 2020-Oct-23 20:42
1958-Nov-21 14:08 10:44 Earth 0.396558679718692 0.385419080620456 0.407698290020246 20.91212935506 20.9118080556143 2436529.088614686 643.963206274869 555496.991981358 1855.04431503 -0.473610207614634 252.133986515368 T 1 CATAB v2.0f-lin.ifort 2020-Oct-23 20:42:15 2020-Oct-23 20:42
1959-Feb-12 04:18 12:39 Mars 0.0997459603137014 0.0960035763412423 0.104290656372954 10.8358867632094 10.8356218816521 2436611.679263389 758.50624737492 492083.117074207 3230.63651875763 65.0688365430995 4274.72796042395 T 1 CATAB v2.0f-lin.ifort 2020-Oct-23 20:42:15 2020-Oct-23 20:42
2020-Oct-21 13:25 < 00:01 Earth 0.0118017833696776 0.0117657991696289 0.0118377666186931 9.13850576774566 9.11376701710606 2459144.058946845 0.343506284663743 1786.54924392611 63.0175537290099 1.29709057858881 672.219627370486 T 1 CATAB v2.0f-lin.ifort 2020-Oct-23 20:42:15 2020-Oct-23 20:42
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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