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 ]  
12389 (1994 WU)
Classification: Main-belt Asteroid          SPK-ID: 2012389
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1638102976815132 4.2125e-08  
a 3.08428375576896 1.7273e-08 au
q 2.579046315602191 1.2843e-07 au
i 13.09713560512804 3.4655e-06 deg
node 253.5950790186993 2.0814e-05 deg
peri 301.1202376574631 2.3672e-05 deg
M 138.3221355214239 1.3858e-05 deg
tp 2458240.315340686824
(2018-May-01.81534069)
7.3453e-05 TDB
period 1978.47203790717
5.42
1.662e-05
4.55e-08
d
yr
n .1819585989098984 1.5286e-09 deg/d
Q 3.589521195935729 2.0103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2139  
   data-arc span      13517 days (37.01 yr)  
   first obs. used      1983-11-08  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43701  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:49:06  

Additional Information
 Earth MOID = 1.60479 au 
 Jupiter MOID = 1.57926 au 
 T_jup = 3.167 
[ 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 12.7   n/a MPO452345  
diameter diameter 19.936 km 2.797 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.049   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

12389 (1994 WU)          Discovered 1994-Nov-25 by Kobayashi, T. at Oizumi
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 WU = 1983 VY4 = 1998 QY71 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-16 10:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin