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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
392186 (2009 QR21)
Classification: Main-belt Asteroid          SPK-ID: 2392186
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .239882453658109 7.8167e-08  
a 3.167566337501559 1.153e-07 au
q 2.407722752336855 2.3997e-07 au
i 28.69245912477103 1.0691e-05 deg
node 148.7864714614985 1.8369e-05 deg
peri 137.3367493390312 2.7896e-05 deg
M 288.7252162593784 2.9335e-05 deg
tp 2459008.180944814546
(2020-Jun-07.68094481)
0.00018436 TDB
period 2059.145358719494
5.64
0.00011243
3.078e-07
d
yr
n .1748298139689714 9.546e-09 deg/d
Q 3.927409922666263 1.4296e-07 au
  Orbit Determination Parameters
   # obs. used (total)      125  
   data-arc span      4400 days (12.05 yr)  
   first obs. used      2007-03-16  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62314  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:00:28  

Additional Information
 Earth MOID = 1.45003 au 
 Jupiter MOID = 1.65946 au 
 T_jup = 2.972 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO434452  

392186 (2009 QR21)          Discovered 2008-Apr-08 by CSS at Catalina
Reference: Last Updated: 2014-04-17

[ show close-approach data ]
Alternate Designations
 2009 QR21 = 2013 CC167 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin