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 ]  
11903 (1991 RD7)
Classification: Main-belt Asteroid          SPK-ID: 2011903
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1825738854684515 9.2628e-08  
a 2.562764592127782 2.3619e-08 AU
q 2.094870703002042 2.2993e-07 AU
i 16.33526866918763 8.8726e-06 deg
node 3.746865706379227 1.9597e-05 deg
peri 354.5974847891151 2.994e-05 deg
M 190.4787377271651 3.1915e-05 deg
tp 2457506.139975409280
(2016-Apr-27.63997541)
0.00013851 JED
period 1498.516396949034
4.10
2.0716e-05
5.672e-08
d
yr
n .2402376115022544 3.3211e-09 deg/d
Q 3.030658481253523 2.7931e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      21839 days (59.79 yr)  
   first obs. used      1954-09-03  
   last obs. used      2014-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49661  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:27:12  

Additional Information
 Earth MOID = 1.09085 AU 
 T_jup = 3.355 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8 mag n/a MPO253448  

11903 (1991 RD7)          Discovered 1991-Sep-02 by McNaught, R. H. at Siding Spring (413)
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RD7 = 1954 RW = 1987 SL21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Jul-22 09:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin