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 ]  
(2011 UG21)
Classification: Aten [NEO]          SPK-ID: 3582232
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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .546966338202141 9.6223e-07  
a .9369736392387846 5.7752e-08 au
q .4244805987924127 8.7631e-07 au
i 14.56763816936303 1.6877e-05 deg
node 86.61443392642863 0.00011025 deg
peri 82.42177508146415 0.0001039 deg
M 349.8897398932567 0.00013144 deg
tp 2458609.803563236873
(2019-May-06.30356324)
0.00012173 TDB
period 331.2756279178722
0.91
3.0628e-05
8.385e-08
d
yr
n 1.086708377137992 1.0047e-07 deg/d
Q 1.449466679685157 8.934e-08 au
  Orbit Determination Parameters
   # obs. used (total)      76  
   data-arc span      2845 days (7.79 yr)  
   first obs. used      2011-10-19  
   last obs. used      2019-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .30706  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Aug-04 05:59:04  

Additional Information
 Earth MOID = .128709 au 
 Jupiter MOID = 3.5768 au 
 T_jup = 6.241 
[ 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 19.5   n/a MPO456805  

[ 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
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin