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 ]  
4381 Uenohara (1989 WD1)
Classification: Main-belt Asteroid          SPK-ID: 2004381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07593898768427639 1.3442e-08  
a 3.026194102111313 1.3737e-08 au
q 2.796387985460852 3.7615e-08 au
i 11.23861003563086 7.5542e-07 deg
node 108.0038424745572 6.1419e-06 deg
peri 228.1949831725409 2.1045e-05 deg
M 81.09145300402854 1.6633e-05 deg
tp 2458963.372080731483
(2020-Apr-23.87208073)
8.8912e-05 TDB
period 1922.841990868261
5.26
1.3092e-05
3.584e-08
d
yr
n .1872228720350764 1.2748e-09 deg/d
Q 3.256000218761773 1.478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3006  
   data-arc span      24972 days (68.37 yr)  
   first obs. used      1952-10-21  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40019  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:23:10  

Additional Information
 Earth MOID = 1.79844 au 
 Jupiter MOID = 2.04061 au 
 T_jup = 3.211 
[ 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 11.38   n/a E2021B10  
diameter diameter 20.242 km 0.821 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.157   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4381 Uenohara (1989 WD1)          Discovered 1989-Nov-22 by Kawasato, N. at Uenohara
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 WD1 = 1952 UF = 1954 CD = 1955 HS = 1960 HB = 1976 HN = 1978 TO4 = 1979 YQ8 = 1983 TD1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 23:12 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin