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(2021 AC)
Classification: Apollo [NEO]          SPK-ID: 54104073
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07450941425454576 0.00011188  
a 1.036482581861373 0.0002073 au
q .9592548718018428 7.5904e-05 au
i 26.61655720637035 0.019519 deg
node 285.252487828706 8.043e-05 deg
peri 251.4213769242698 0.1087 deg
M 278.0551602563654 0.12009 deg
tp 2459288.232508788225
(2021-Mar-14.73250879)
0.10225 TDB
period 385.4263827053769
1.06
0.11563
0.0003166
d
yr
n .9340305079094364 0.00028022 deg/d
Q 1.113710291920903 0.00022275 au
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      18 days  
   first obs. used      2021-01-02  
   last obs. used      2021-01-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .61116  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-27 05:49:19  

Additional Information
 Earth MOID = .0232354 au 
 Jupiter MOID = 3.98974 au 
 T_jup = 5.816 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459220.5 (2021-Jan-06.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07482255157181718 0.0001115  
q .959069518219393 7.6229e-05 au
tp 2459288.200979055927
(2021-Mar-14.70097906)
0.10182 TDB
node 285.2501230568873 7.4998e-05 deg
peri 251.4126593316397 0.10831 deg
i 26.62713816053294 0.019501 deg
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      18 days  
   first obs. used      2021-01-02  
   last obs. used      2021-01-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .61116  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-27 05:49:19  

Additional Information
 Jupiter MOID = 3.98974 au 
 T_jup = 5.816 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.243177751901347E-8 8.498923949955956E-9 -1.135215703285978E-5 -8.355690501201092E-9 -1.207601501748671E-5 2.174266420283066E-6
q 8.498923949955956E-9 5.810929625661092E-9 -7.761325372690673E-6 -5.71371182952304E-9 -8.256251568339314E-6 1.486491199578673E-6
tp -1.135215703285978E-5 -7.761325372690673E-6 .01036663334030046 7.630993975549908E-6 .01102767395528782 -.001985487487237113
node -8.355690501201092E-9 -5.71371182952304E-9 7.630993975549908E-6 5.624663617859312E-9 8.117641557611051E-6 -1.461560490401471E-6
peri -1.207601501748671E-5 -8.256251568339314E-6 .01102767395528782 8.117641557611051E-6 .01173086828897873 -.002112093340793682
i 2.174266420283066E-6 1.486491199578673E-6 -.001985487487237113 -1.461560490401471E-6 -.002112093340793682 .0003802810947623422

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 23.70   .39553 E2021-BA4 autocmod 2.8

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