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 ]  
392016 (2009 AK21)
Classification: Main-belt Asteroid          SPK-ID: 2392016
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .1323632142442304 5.82e-08  
a 2.738468824619992 5.241e-08 au
q 2.37599628888567 1.5681e-07 au
i 6.185271772881726 6.444e-06 deg
node 81.89492108476306 7.3874e-05 deg
peri 358.4506234022483 8.6739e-05 deg
M 116.5976582319152 5.1519e-05 deg
tp 2458064.397964799439
(2017-Nov-06.89796480)
0.00022521 TDB
period 1655.236782614684
4.53
4.7518e-05
1.301e-07
d
yr
n .2174915418634718 6.2437e-09 deg/d
Q 3.100941360354313 5.9347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      103  
   data-arc span      3815 days (10.44 yr)  
   first obs. used      2008-12-22  
   last obs. used      2019-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57787  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:08:23  

Additional Information
 Earth MOID = 1.39165 au 
 Jupiter MOID = 2.12978 au 
 T_jup = 3.330 
[ 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 16.9   n/a MPO434450  

392016 (2009 AK21)          Discovered 2008-Dec-22 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-04-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin