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 ]  
393894 (2005 TR121)
Classification: Main-belt Asteroid          SPK-ID: 2393894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027304441119609 6.5112e-08  
a 2.177108186829293 2.5442e-08 au
q 1.735742077233605 1.5055e-07 au
i 3.290151135348221 1.465e-05 deg
node 191.8535639532572 0.0001705 deg
peri 107.2105572074848 0.00017937 deg
M 258.0799779918291 6.242e-05 deg
tp 2459332.681507192675
(2021-Apr-28.18150719)
0.00020799 TDB
period 1173.325321493513
3.21
2.0567e-05
5.631e-08
d
yr
n .3068202768706635 5.3782e-09 deg/d
Q 2.618474296424981 3.0599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      76  
   data-arc span      14354 days (39.30 yr)  
   first obs. used      1979-07-24  
   last obs. used      2018-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58419  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:11:37  

Additional Information
 Earth MOID = .72373 au 
 Jupiter MOID = 2.60171 au 
 T_jup = 3.655 
[ 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 18.5   n/a MPO472043  

393894 (2005 TR121)          Discovered 2005-Oct-07 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-05-15

[ show close-approach data ]
Alternate Designations
 2005 TR121 = 1979 OQ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-24 23:40 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin