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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 ]

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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 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 
[ 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 23.56   .48439 E2021P04 autocmod 2.9c

[ 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
2008-Jun-06 03:43 3_04:32 Mars 0.0905613542151046 0.0795745174405716 0.292499782425389 8.05974100860748 8.05934876780725 2454623.654658463 4591.51677257602 11880148.769952 211.521187455743 61.4907829800678 57849.6371788417 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2018-Jul-12 03:13 3_22:16 Earth 0.338352742665278 0.262215061044792 0.414563069499853 20.4034011032938 20.4030151416068 2458311.633874800 5656.0184565044 3806527.00944362 52.8897351851914 3.6453363108635 53376.1574791619 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2021-Aug-03 15:25 < 00:01 Earth 0.0327621095063264 0.0325714698813466 0.0329527456494209 10.0855951699051 10.077528158176 2459430.142525713 0.268211757510595 9491.39722337269 14.5119553786309 0.109735244910711 334.563216682406 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2027-Dec-29 21:05 9_06:40 Earth 0.109621647107634 0.0601434666423137 0.254964664616803 13.2977954865797 13.2959675284871 2461769.378759360 13360.3235010574 7785165.65480953 30.7749653800312 -33.2827282091582 277799.857939611 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2084-Mar-03 08:06 1_02:35 Mars 0.0815007087270729 0.0814325764746383 0.146656402333713 7.31869328764545 7.31821330503669 2482287.837623722 1594.88356339778 5919843.90962459 150.911895682359 87.711159813224 88767.2499241435 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2090-Jul-07 02:30 3_18:56 Earth 0.448563129789911 0.378066933118766 0.519065710139934 23.6162402196156 23.61598869509 2484604.604149676 5456.36332526141 3516532.04274035 45.2186865426414 1.387337082788 32136.533929425 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
2157-Jan-07 07:09 5_02:23 Mars 0.0845163318545612 0.0832172523109829 0.102554603638523 7.18300244188991 7.18253084189023 2508894.798023049 7343.11870416077 2253524.76266779 195.417289897192 -79.9549727741179 65040.6944666981 T 5 CATAB v2.0g-lin.ifort 2021-Aug-01 05:51:45 2021-Aug-01 05:51
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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