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 ]  
21969 (1999 WJ17)
Classification: Main-belt Asteroid          SPK-ID: 2021969
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06666763659212727 3.2674e-08  
a 2.331288207871066 6.649e-09 au
q 2.175866732837206 7.5317e-08 au
i 6.045447769306461 3.099e-06 deg
node 222.1801349512827 3.107e-05 deg
peri 288.3131562112073 3.7863e-05 deg
M 268.2538108962971 2.2286e-05 deg
tp 2459727.843084148331
(2022-May-28.34308415)
8.0945e-05 TDB
period 1300.146757687888
3.56
5.5622e-06
1.523e-08
d
yr
n .2768918184591752 1.1846e-09 deg/d
Q 2.486709682904926 7.0923e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1885  
   data-arc span      14378 days (39.36 yr)  
   first obs. used      1981-10-01  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48259  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:56:33  

Additional Information
 Earth MOID = 1.1954 au 
 Jupiter MOID = 2.51554 au 
 T_jup = 3.560 
[ 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 14.83   n/a E2021B10  

21969 (1999 WJ17)          Discovered 1999-Nov-30 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ 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 2021-Jul-31 07:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin