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JPL Small-Body Database Browser
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(2021 NL4)
Classification: Apollo [NEO]          SPK-ID: 54168303
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 2459408.5 (2021-Jul-13.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3896977708869998 0.00077586  
a 1.327290286877309 0.0012123 au
q .8100482207612553 0.00028992 au
i 4.023886850203722 0.006282 deg
node 331.1451274715245 0.0067584 deg
peri 51.00676068482313 0.0096373 deg
M 312.0757421923588 0.085341 deg
tp 2459482.853291060997
(2021-Sep-25.35329106)
0.030538 TDB
period 558.5310238793325
1.53
0.76521
0.002095
d
yr
n .6445479026385758 0.00088306 deg/d
Q 1.844532352993363 0.0016847 au
  Orbit Determination Parameters
   # obs. used (total)      41  
   data-arc span      20 days  
   first obs. used      2021-07-10  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .46901  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-01 05:51:45  

Additional Information
 Earth MOID = .026964 au 
 Jupiter MOID = 3.62381 au 
 T_jup = 4.848 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 6.019518184047403E-7 -2.2493679752205E-7 -2.369274869921188E-5 5.215096292544341E-6 -7.467256497704888E-6 4.873782325298244E-6
q -2.2493679752205E-7 8.405553422951802E-8 8.853304832891893E-6 -1.949461545201001E-6 2.790749888810037E-6 -1.821186738819166E-6
tp -2.369274869921188E-5 8.853304832891893E-6 .000932568254121439 -.0002051660386900089 .0002938506757653587 -.0001918377553570298
node 5.215096292544341E-6 -1.949461545201001E-6 -.0002051660386900089 4.567612741277687E-5 -6.503104558481771E-5 4.21920748307561E-5
peri -7.467256497704888E-6 2.790749888810037E-6 .0002938506757653587 -6.503104558481771E-5 9.28775913880889E-5 -6.043692880791012E-5
i 4.873782325298244E-6 -1.821186738819166E-6 -.0001918377553570298 4.21920748307561E-5 -6.043692880791012E-5 3.946343327421318E-5

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 23.56   .48439 E2021P04 autocmod 2.9c

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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