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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07609460288368439 3.6052e-08  
a 3.025996369737992 1.4652e-08 au
q 2.795734377655309 1.0729e-07 au
i 11.23876790780876 3.318e-06 deg
node 108.002223933667 2.2674e-05 deg
peri 227.9847231157939 3.4385e-05 deg
M 7.126277595660099 2.5286e-05 deg
tp 2458962.440658851433
(2020-Apr-22.94065885)
0.00013506 TDB
period 1922.653535392463
5.26
1.3964e-05
3.823e-08
d
yr
n .1872412233265494 1.3599e-09 deg/d
Q 3.256258361820676 1.5767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2740  
   data-arc span      24842 days (68.01 yr)  
   first obs. used      1952-10-21  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41267  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:52:02  

Additional Information
 Earth MOID = 1.79836 au 
 Jupiter MOID = 2.04132 au 
 T_jup = 3.211 
[ 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 11.3   n/a MPO358672  
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

[ show close-approach data ]
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 | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-25 17:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin