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 ]  
18374 (1991 RA18)
Classification: Main-belt Asteroid          SPK-ID: 2018374
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326996770374516 6.1524e-08  
a 2.689625028783501 2.2239e-08 AU
q 2.332712656112084 1.644e-07 AU
i 3.046119931990481 6.2968e-06 deg
node 215.5967842696242 0.00010672 deg
peri 154.0977666391578 0.0001086 deg
M 83.70635918477589 2.2092e-05 deg
tp 2456625.879115391849
(2013-Nov-29.37911539)
9.802e-05 JED
period 1611.15021334559
4.41
1.9983e-05
5.471e-08
d
yr
n .2234428528252818 2.7713e-09 deg/d
Q 3.046537401454918 2.5191e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      904  
   data-arc span      8610 days (23.57 yr)  
   first obs. used      1991-09-13  
   last obs. used      2015-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51204  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:31:31  

Additional Information
 Earth MOID = 1.3327 AU 
 T_jup = 3.358 
[ 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 14.4 mag n/a MPO313567  

18374 (1991 RA18)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RA18 = 1998 FJ140 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Jul-31 17:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin