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 ]  
469674 (2004 XK21)
Classification: Main-belt Asteroid          SPK-ID: 2469674
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2957986806709811 2.6263e-07  
a 2.57855619389388 7.3012e-08 au
q 1.815822673704084 7.2567e-07 au
i 4.473347178606647 7.2824e-06 deg
node 248.9352575420579 0.0001713 deg
peri 132.599015939159 0.00017891 deg
M 297.2472539704542 6.7328e-05 deg
tp 2459264.129230306827
(2021-Feb-18.62923031)
0.00029374 TDB
period 1512.3883641008
4.14
6.4235e-05
1.759e-07
d
yr
n .2380340979507867 1.011e-08 deg/d
Q 3.341289714083677 9.4609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      127  
   data-arc span      4797 days (13.13 yr)  
   first obs. used      2004-12-02  
   last obs. used      2018-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61042  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-06 09:57:05  

Additional Information
 Earth MOID = .822714 au 
 Jupiter MOID = 2.14231 au 
 T_jup = 3.359 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.3   n/a MPO437769  

469674 (2004 XK21)          Discovered 2004-Dec-08 by LINEAR at Socorro
Reference: Last Updated: 2016-08-22

Alternate Designations
 2004 XK21 = 2008 US203 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-30 15:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin