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
JPL Small-Body Database Browser
Search: [ help ]  
66638 (1999 RD218)
Classification: Main-belt Asteroid          SPK-ID: 2066638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1242032276255933 3.6234e-08  
a 2.665752837028379 1.2976e-08 au
q 2.334657730617371 9.8093e-08 au
i 12.40119673459727 4.5416e-06 deg
node 159.8010962836328 1.877e-05 deg
peri 94.38231470705894 2.7427e-05 deg
M 20.0921130299387 1.8721e-05 deg
tp 2459111.773906830324
(2020-Sep-19.27390683)
8.2764e-05 TDB
period 1589.747852477657
4.35
1.1608e-05
3.178e-08
d
yr
n .2264510056981251 1.6535e-09 deg/d
Q 2.996847943439386 1.4588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      944  
   data-arc span      8185 days (22.41 yr)  
   first obs. used      1998-02-23  
   last obs. used      2020-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54896  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:54  

Additional Information
 Earth MOID = 1.35899 au 
 Jupiter MOID = 2.14832 au 
 T_jup = 3.339 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.90   n/a E2021B10  

66638 (1999 RD218)          Discovered 1999-Sep-04 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-15 16:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin