Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
15225 (1985 RJ4)
Classification: Main-belt Asteroid          SPK-ID: 2015225
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2013760343617991 5.1718e-08  
a 3.130057739065377 2.8116e-08 au
q 2.499739124248933 1.5593e-07 au
i 2.250352106708303 5.6331e-06 deg
node 33.53138422792335 0.00013647 deg
peri 313.9514781779681 0.00013721 deg
M 221.2074699388597 1.6788e-05 deg
tp 2458380.313127820961
(2018-Sep-18.81312782)
9.8991e-05 JED
period 2022.678928699395
5.54
2.7254e-05
7.462e-08
d
yr
n .1779817819289213 2.3981e-09 deg/d
Q 3.760376353881822 3.3778e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1137  
   data-arc span      15179 days (41.56 yr)  
   first obs. used      1974-09-19  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55552  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:21:29  

Additional Information
 Earth MOID = 1.49286 au 
 Jupiter MOID = 1.65568 au 
 T_jup = 3.181 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO337387  

15225 (1985 RJ4)          Discovered 1985-Sep-11 by Debehogne, H. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1985 RJ4 = 1974 SD1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-04 23:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin