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 ]  
18648 (1998 FW9)
Classification: Main-belt Asteroid          SPK-ID: 2018648
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1823433697074357 3.1035e-08  
a 2.320599954084745 8.4195e-09 au
q 1.897453938714012 7.0096e-08 au
i 12.69617912493974 4.3925e-06 deg
node 194.656078308811 1.3853e-05 deg
peri 62.59756920693647 1.8259e-05 deg
M 99.03578982515769 1.1101e-05 deg
tp 2458845.287275662608
(2019-Dec-27.78727566)
3.9445e-05 TDB
period 1291.215842143737
3.54
7.0271e-06
1.924e-08
d
yr
n .2788069881502624 1.5173e-09 deg/d
Q 2.743745969455477 9.9548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      899  
   data-arc span      24117 days (66.03 yr)  
   first obs. used      1954-12-05  
   last obs. used      2020-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50357  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:39:22  

Additional Information
 Earth MOID = .919615 au 
 Jupiter MOID = 2.35439 au 
 T_jup = 3.523 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.05   n/a E2021B10  

18648 (1998 FW9)          Discovered 1998-Mar-24 by ODAS at Caussols
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FW9 = 1991 GX2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-11 02:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin