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 ]  
27721 (1989 WJ)
Classification: Main-belt Asteroid          SPK-ID: 2027721
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320513026351461 7.5014e-08  
a 2.600669205265808 2.519e-08 AU
q 2.257247448987348 1.9483e-07 AU
i 15.05083812243732 8.466e-06 deg
node 66.87292653395552 2.742e-05 deg
peri 8.42447914937512 4.0584e-05 deg
M 342.5344883987212 2.8024e-05 deg
tp 2457074.819864714249
(2015-Feb-21.31986471)
0.00011936 JED
period 1531.884774286857
4.19
2.2257e-05
6.094e-08
d
yr
n .2350046204797563 3.4144e-09 deg/d
Q 2.944090961544269 2.8516e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      628  
   data-arc span      9109 days (24.94 yr)  
   first obs. used      1989-11-20  
   last obs. used      2014-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51387  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:51:47  

Additional Information
 Earth MOID = 1.27251 AU 
 T_jup = 3.354 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO263584  

27721 (1989 WJ)          Discovered 1989-Nov-20 by Oshima, Y. at Gekko (888)
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WJ = 1999 CP127 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Nov-28 01:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin