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 ]  
13955 (1990 UA2)
Classification: Main-belt Asteroid          SPK-ID: 2013955
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2685790788386838 4.7804e-08  
a 2.560351747312442 1.2221e-08 au
q 1.872694833516252 1.1695e-07 au
i 4.329256465427327 5.8855e-06 deg
node 113.5093713642586 4.8393e-05 deg
peri 280.6844502934882 5.0158e-05 deg
M 78.93492405176191 1.3134e-05 deg
tp 2458672.393697806178
(2019-Jul-07.89369781)
5.3857e-05 TDB
period 1496.400613653843
4.10
1.0714e-05
2.933e-08
d
yr
n .2405772870681791 1.7225e-09 deg/d
Q 3.248008661108631 1.5503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      913  
   data-arc span      10773 days (29.49 yr)  
   first obs. used      1990-10-21  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53177  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:56:59  

Additional Information
 Earth MOID = .885124 au 
 Jupiter MOID = 2.20026 au 
 T_jup = 3.380 
[ 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 15.3   n/a MPO452367  

13955 (1990 UA2)          Discovered 1990-Oct-21 by Urata, T. at Oohira
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
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-29 17:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin