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 ]  
173937 (2001 WK9)
Classification: Main-belt Asteroid          SPK-ID: 2173937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .242250833857384 4.6073e-08  
a 3.124590874515723 2.4499e-08 au
q 2.367656129701116 1.4066e-07 au
i 8.73394778556713 7.1504e-06 deg
node 218.28433676 3.5182e-05 deg
peri 226.4700637020686 3.8078e-05 deg
M 114.8937643374458 1.4976e-05 deg
tp 2458356.653817631354
(2018-Aug-26.15381763)
8.0259e-05 TDB
period 2017.382118075229
5.52
2.3727e-05
6.496e-08
d
yr
n .1784490884371839 2.0988e-09 deg/d
Q 3.88152561933033 3.0434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      6761 days (18.51 yr)  
   first obs. used      2001-10-23  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:13  

Additional Information
 Earth MOID = 1.39337 au 
 Jupiter MOID = 1.47046 au 
 T_jup = 3.152 
[ 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 15.5   n/a MPO294211  

173937 (2001 WK9)          Discovered 2001-Nov-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-07 19:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin