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 ]  
18355 (1990 RN9)
Classification: Main-belt Asteroid          SPK-ID: 2018355
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2485544535739118 9.5014e-08  
a 2.647431467605031 2.5055e-08 AU
q 1.989400585800083 2.4289e-07 AU
i 10.90792580842873 8.9969e-06 deg
node 304.5713655421566 4.2775e-05 deg
peri 73.53642831986544 4.6607e-05 deg
M 155.8247918201965 2.0923e-05 deg
tp 2456119.464781286336
(2012-Jul-10.96478129)
8.6335e-05 JED
period 1573.386852458108
4.31
2.2335e-05
6.115e-08
d
yr
n .2288057761748616 3.248e-09 deg/d
Q 3.305462349409979 3.1282e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      548  
   data-arc span      13792 days (37.76 yr)  
   first obs. used      1976-06-24  
   last obs. used      2014-03-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52288  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:12:12  

Additional Information
 Earth MOID = 1.02121 AU 
 T_jup = 3.322 
[ 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 13.7 mag n/a MPO256999  

18355 (1990 RN9)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar (675)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-24 03:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin