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 ]  
4749 (1989 WE1)
Classification: Main-belt Asteroid          SPK-ID: 2004749
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1043468485723197 7.25e-08  
a 3.009152198633784 3.3085e-08 AU
q 2.695156649831882 2.327e-07 AU
i 10.75407290225352 7.0306e-06 deg
node 93.09343302320821 3.8388e-05 deg
peri 284.9628261738562 5.3983e-05 deg
M 328.3338419745236 4.0207e-05 deg
tp 2457168.209449065482
(2015-May-25.70944907)
0.00021377 JED
period 1906.622256321705
5.22
3.1444e-05
8.609e-08
d
yr
n .1888155867300738 3.114e-09 deg/d
Q 3.323147747435687 3.6537e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      953  
   data-arc span      14094 days (38.59 yr)  
   first obs. used      1976-04-23  
   last obs. used      2014-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48329  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:08:49  

Additional Information
 Earth MOID = 1.72315 AU 
 T_jup = 3.215 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8 mag n/a MPO313458  

4749 (1989 WE1)          Discovered 1989-Nov-22 by Kawasato, N. at Uenohara
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WE1 = 1976 HJ = 1978 TG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Jan-30 06:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin