Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
(2021 AB)
Classification: Apollo [NEO]          SPK-ID: 54104072
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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459217.5 (2021-Jan-03.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6510514637037537 0.00063899  
q .8764090351047118 7.6592e-05 au
tp 2459248.887159297540
(2021-Feb-03.38715930)
0.006112 TDB
node 293.879825707612 0.0017899 deg
peri 212.8349756080612 0.0018536 deg
i 1.348396855047984 0.0010355 deg
  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
 Jupiter MOID = .874794 au 
 T_jup = 3.121 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.083065545894794E-7 -4.89219307955869E-8 -3.901786923371144E-6 6.639718744175312E-7 9.809837596100931E-7 6.552721142391874E-7
q -4.89219307955869E-8 5.866303920336969E-9 4.66923846228673E-7 -8.250324947103015E-8 -1.155770170246295E-7 -7.822583040794287E-8
tp -3.901786923371144E-6 4.66923846228673E-7 3.735688554137381E-5 -5.978735125489987E-6 -9.618130414998991E-6 -6.297391182524003E-6
node 6.639718744175312E-7 -8.250324947103015E-8 -5.978735125489987E-6 3.203842987402179E-6 9.861925663855893E-8 8.565803108521077E-7
peri 9.809837596100931E-7 -1.155770170246295E-7 -9.618130414998991E-6 9.861925663855893E-8 3.435972170646171E-6 1.722324294636117E-6
i 6.552721142391874E-7 -7.822583040794287E-8 -6.297391182524003E-6 8.565803108521077E-7 1.722324294636117E-6 1.072242471397046E-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 25.18   .2937 E2021A28 autocmod 2.8

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-27 04:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin