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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
100646 (1997 WR)
Classification: Main-belt Asteroid          SPK-ID: 2100646
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .150968752040303 4.7195e-08  
a 2.614427136364454 1.1513e-08 au
q 2.219730334287209 1.2424e-07 au
i 3.792242052200157 5.4346e-06 deg
node 50.30171099975054 6.7662e-05 deg
peri 14.52773818180153 6.9862e-05 deg
M 117.2260612170298 1.5985e-05 deg
tp 2458497.711989404684
(2019-Jan-14.21198940)		 6.8081e-05 TDB
period 1544.056687865741
4.23		 1.0199e-05
2.792e-08		 d
yr
n .23315206159795 1.5401e-09 deg/d
Q 3.009123938441698 1.3251e-08 au
   Orbit Determination Parameters
   # obs. used (total)      767  
   data-arc span      8099 days (22.17 yr)  
   first obs. used      1997-11-18  
   last obs. used      2020-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53536  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:08:50  

Additional Information
 Earth MOID = 1.2334 au 
 Jupiter MOID = 2.29581 au 
 T_jup = 3.389 
[ 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 15.4   n/a MPO469012  

100646 (1997 WR)          Discovered 1997-Nov-19 by Kobayashi, T. at Oizumi
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1997 WR = 2001 QJ248 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-08 06:58 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin