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
JPL Small-Body Database Browser
Search: [ help ]  
(2021 JR2)
Classification: Apollo [NEO]          SPK-ID: 54144234
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 2459343.5 (2021-May-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3276860950142952 0.0014574  
a 1.413614435391783 0.0029173 au
q .950392641202412 9.8999e-05 au
i 15.9167015398127 0.045436 deg
node 55.88309221151412 0.0060222 deg
peri 226.1897342542205 0.033885 deg
M 333.2368543371173 0.11386 deg
tp 2459389.138308636924
(2021-Jun-23.63830864)
0.052899 TDB
period 613.8961135678005
1.68
1.9003
0.005203
d
yr
n .5864184379793121 0.0018153 deg/d
Q 1.876836229581154 0.0038732 au
  Orbit Determination Parameters
   # obs. used (total)      40  
   data-arc span      7 days  
   first obs. used      2021-05-07  
   last obs. used      2021-05-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .5068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-14 05:52:57  

Additional Information
 Earth MOID = .01386 au 
 Jupiter MOID = 3.29497 au 
 T_jup = 4.628 
[ 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 24.466   .3162 4 autocmod 2.9c

[ 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-Jun-20 11:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin