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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132082174858449 8.8217e-08  
a 2.600967363755486 2.8491e-08 AU
q 2.257425937614815 2.2393e-07 AU
i 15.05043010608025 9.2476e-06 deg
node 66.87477189643043 2.9673e-05 deg
peri 8.369470579907167 4.3426e-05 deg
M 295.5844524425652 3.1208e-05 deg
tp 2457074.650462664309
(2015-Feb-21.15046266)
0.00013412 JED
period 1532.148220445578
4.19
2.5175e-05
6.893e-08
d
yr
n .2349642124671887 3.8607e-09 deg/d
Q 2.944508789896157 3.2254e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      616  
   data-arc span      8601 days (23.55 yr)  
   first obs. used      1989-11-20  
   last obs. used      2013-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55409  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 21:54:31  

Additional Information
 Earth MOID = 1.27215 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-Apr-18 18:40 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin