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 ]  
21012 (1988 RU9)
Classification: Main-belt Asteroid          SPK-ID: 2021012
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08350282755757928 6.6483e-08  
a 3.114714615145595 3.8323e-08 AU
q 2.854627137746021 2.152e-07 AU
i 15.60147129734307 6.6847e-06 deg
node 167.4144020337885 2.2608e-05 deg
peri 239.3886535800837 4.7543e-05 deg
M 227.7410040118734 4.6208e-05 deg
tp 2457738.146929037773
(2016-Dec-15.64692904)
0.00026681 JED
period 2007.82481728077
5.50
3.7056e-05
1.015e-07
d
yr
n .1792985109565256 3.3091e-09 deg/d
Q 3.37480209254517 4.1523e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      865  
   data-arc span      9455 days (25.89 yr)  
   first obs. used      1988-09-08  
   last obs. used      2014-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5035  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:43:12  

Additional Information
 Earth MOID = 1.89438 AU 
 T_jup = 3.156 
[ 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 13.4 mag n/a MPO309318  

21012 (1988 RU9)          Discovered 1988-Sep-08 by Debehogne, H. at La Silla (809)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 RU9 = 1988 RS11 = 1999 RE32 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-31 07:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin