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JPL Small-Body Database Browser
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(2021 AB)
Classification: Apollo [NEO]          SPK-ID: 54104072
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6516707787364201 0.00063804  
a 2.518898596941632 0.0043888 au
q .8774059867146028 7.8468e-05 au
i 1.42483036767972 0.00089187 deg
node 293.3236069430916 0.0027308 deg
peri 213.1559528054882 0.0012251 deg
M 36.42979675997205 0.093812 deg
tp 2459248.735978848873
(2021-Feb-03.23597885)
0.0056712 TDB
period 1460.207092696567
4.00
3.8162
0.01045
d
yr
n .2465403721161137 0.00064433 deg/d
Q 4.160391207168662 0.0072488 au
  Orbit Determination Parameters
   # obs. used (total)      55  
   data-arc span      1 day  
   first obs. used      2021-01-02  
   last obs. used      2021-01-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .50817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:25  

Additional Information
 Earth MOID = .00432745 au 
 Jupiter MOID = .874794 au 
 T_jup = 3.121 
[ 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 25.18   .2937 E2021A28 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
1903-Jul-22 01:32 9_19:22 Mars 0.0493205843244211 0.0178043679233872 0.217910046762728 19.3260803366909 19.3257799798182 2416317.563669791 14121.7018995036 8536518.85773177 427.046653991476 21.1721298808089 6223.25379658909 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:22:25 2021-Apr-15 23:22
1954-Apr-24 00:26 6_01:11 Earth 0.197467072439984 0.109184125777934 0.286554938610886 19.3621416159613 19.3614447133483 2434856.518019641 8710.9297024783 4466891.06833101 332.489627391194 7.23809777222149 10402.5517688575 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:22:25 2021-Apr-15 23:22
1961-Dec-09 04:14 18:01 Earth 0.286384150316123 0.264223084073441 0.308562542947197 22.1963729575782 22.1959537921408 2437642.676167916 1081.42049322786 1111081.42085046 972.366200360778 -5.72789556740179 4074.67056093551 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:22:25 2021-Apr-15 23:22
2021-Jan-04 04:03 < 00:01 Earth 0.00562488514077218 0.00561024059247422 0.00563952922917477 12.6420270117939 12.6045014653673 2459218.668660905 0.0362024957293102 725.822367073399 3.7391467780386 0.167597847363128 792.592151812292 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:22:25 2021-Apr-15 23:22
2021-Jan-04 04:22 < 00:01 Moon 0.00740435924045131 0.00739027596780769 0.00741844475382596 11.6058521241594 11.6054707411007 2459218.681995369 0.0953254144735058 731.114883005169 4.75298474916926 -16.1505219374114 56788.0608025424 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:22:25 2021-Apr-15 23:22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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