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(2021 AL)
Classification: Apollo [NEO]          SPK-ID: 54104252
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2981684373361486 0.00030957  
a 1.200943522450422 0.00033443 au
q .8428600690324101 0.00013707 au
i 1.715247619479227 0.0017636 deg
node 292.4835313715541 0.0014843 deg
peri 258.7434488132135 0.0064186 deg
M 291.7095171227477 0.034366 deg
tp 2459291.688481918567
(2021-Mar-18.18848192)
0.0078001 TDB
period 480.7090550185466
1.32
0.20079
0.0005497
d
yr
n .7488937357048757 0.00031282 deg/d
Q 1.559026975868435 0.00043414 au
  Orbit Determination Parameters
   # obs. used (total)      56  
   data-arc span      31 days  
   first obs. used      2020-12-23  
   last obs. used      2021-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .31353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-28 06:47:26  

Additional Information
 Earth MOID = .00542887 au 
 Jupiter MOID = 3.39776 au 
 T_jup = 5.249 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459223.5 (2021-Jan-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2982513612006775 0.0003094  
q .8428127280944114 0.00013694 au
tp 2459291.681387703801
(2021-Mar-18.18138770)
0.0077835 TDB
node 292.4816763718621 0.0014784 deg
peri 258.7435822571476 0.0064151 deg
i 1.715478673837895 0.0017631 deg
  Orbit Determination Parameters
   # obs. used (total)      56  
   data-arc span      31 days  
   first obs. used      2020-12-23  
   last obs. used      2021-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .31353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-28 06:47:26  

Additional Information
 Jupiter MOID = 3.39776 au 
 T_jup = 5.249 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.572744598156537E-8 -4.236909468568404E-8 -2.407993243713742E-6 -4.571050729516116E-7 1.984048259898863E-6 5.454815657216342E-7
q -4.236909468568404E-8 1.87529326368445E-8 1.065722484093279E-6 2.023220894525671E-7 -8.782371491533139E-7 -2.414336542538379E-7
tp -2.407993243713742E-6 1.065722484093279E-6 6.058358544066809E-5 1.14968969844729E-5 -4.988999076998562E-5 -1.372082901485073E-5
node -4.571050729516116E-7 2.023220894525671E-7 1.14968969844729E-5 2.185537413322368E-6 -9.478820506439984E-6 -2.604717027966259E-6
peri 1.984048259898863E-6 -8.782371491533139E-7 -4.988999076998562E-5 -9.478820506439984E-6 4.115312382885948E-5 1.130649401893731E-5
i 5.454815657216342E-7 -2.414336542538379E-7 -1.372082901485073E-5 -2.604717027966259E-6 1.130649401893731E-5 3.108527594151804E-6

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 24.7   .4658 E2021D54 autocmod 2.8

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