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 HD3)
Classification: Apollo [NEO]          SPK-ID: 54142827
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 2459336.5 (2021-May-02.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .388935701822349 0.001009  
a 1.64127723704084 0.0026877 au
q 1.002925922967315 2.052e-05 au
i 9.389662955824981 0.018131 deg
node 55.22240883709904 0.0034691 deg
peri 209.695906466575 0.0045749 deg
M 340.1089441112742 0.050417 deg
tp 2459378.935241996347
(2021-Jun-13.43524200)
0.0040073 TDB
period 768.017907352205
2.10
1.8865
0.005165
d
yr
n .4687390704744437 0.0011514 deg/d
Q 2.279628551114365 0.003733 au
  Orbit Determination Parameters
   # obs. used (total)      30  
   data-arc span      7 days  
   first obs. used      2021-04-30  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .41689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-07 05:55:26  

Additional Information
 Earth MOID = .0224374 au 
 Jupiter MOID = 2.82349 au 
 T_jup = 4.191 
[ 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 24.37   .37434 E2021J33 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-May-09 03:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin