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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21236 (1995 WE3)
Classification: Main-belt Asteroid          SPK-ID: 2021236
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09313742388493981 3.1211e-08  
a 2.540639678568651 8.3433e-09 au
q 2.304011043886905 8.0651e-08 au
i 4.39728591714877 2.9596e-06 deg
node 65.53704158774286 4.8644e-05 deg
peri 133.1276170918678 5.2101e-05 deg
M 347.1068111230942 1.9345e-05 deg
tp 2459449.474990265691
(2021-Aug-22.97499027)
7.9502e-05 TDB
period 1479.152805231042
4.05
7.2861e-06
1.995e-08
d
yr
n .2433825624552484 1.1989e-09 deg/d
Q 2.777268313250397 9.1203e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      10300 days (28.20 yr)  
   first obs. used      1993-04-18  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48643  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:56  

Additional Information
 Earth MOID = 1.30458 au 
 Jupiter MOID = 2.17992 au 
 T_jup = 3.435 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457371.5 (2015-Dec-15.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09352810497401363 3.1186e-08  
q 2.302678351603936 8.057e-08 au
tp 2457972.878677932148
(2017-Aug-07.37867793)
7.9253e-05 TDB
node 65.55704649366238 4.8663e-05 deg
peri 133.7333061406468 5.2112e-05 deg
i 4.397199186558846 2.9587e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      10300 days (28.20 yr)  
   first obs. used      1993-04-18  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48643  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:56  

Additional Information
 Jupiter MOID = 2.17992 au 
 T_jup = 3.435 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.725647305659579E-16 -2.501813771013306E-15 -8.096289548766428E-13 1.095457282699283E-15 -1.731124192913218E-13 -1.167632641600536E-15
q -2.501813771013306E-15 6.491493597461524E-15 2.035389384995989E-12 -3.612525121588597E-15 4.286691748796924E-13 3.027246073143128E-15
tp -8.096289548766428E-13 2.035389384995989E-12 6.281091016461334E-9 2.47906649429676E-11 1.493817068534741E-9 2.861350674417893E-12
node 1.095457282699283E-15 -3.612525121588597E-15 2.47906649429676E-11 2.368110759278883E-9 -2.354897507702271E-9 9.187467034966662E-12
peri -1.731124192913218E-13 4.286691748796924E-13 1.493817068534741E-9 -2.354897507702271E-9 2.715681146274076E-9 -8.500597468843456E-12
i -1.167632641600536E-15 3.027246073143128E-15 2.861350674417893E-12 9.187467034966662E-12 -8.500597468843456E-12 8.753625990610503E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.95   n/a MPO636383  
diameter diameter 2.871 km 0.686 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.178   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21236 (1995 WE3)          Discovered 1995-Nov-20 by Farra d'Isonzo at Farra d'Isonzo
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WE3 = 1999 VE68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-23 22:24 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin