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 ]  
1721 Wells (1953 TD3)
Classification: Main-belt Asteroid          SPK-ID: 2001721
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04870218357925619 3.9721e-08  
a 3.145578699579677 1.6104e-08 au
q 2.992382148289749 1.2623e-07 au
i 16.12287578121115 5.688e-06 deg
node 317.0975821563326 1.476e-05 deg
peri 138.182659091813 5.8625e-05 deg
M 277.5631630266765 5.7335e-05 deg
tp 2459467.125081751490
(2021-Sep-09.62508175)
0.00032544 TDB
period 2037.742295776052
5.58
1.5649e-05
4.284e-08
d
yr
n .1766661077537766 1.3567e-09 deg/d
Q 3.298775250869605 1.6888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2257  
   data-arc span      42181 days (115.49 yr)  
   first obs. used      1905-02-09  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39704  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:39:55  

Additional Information
 Earth MOID = 2.02489 au 
 Jupiter MOID = 1.79908 au 
 T_jup = 3.146 
[ 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 10.9   n/a MPO502170  
diameter diameter 43.576 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.045   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1721 Wells (1953 TD3)          Discovered 1953-Oct-03 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1953 TD3 = 1944 DA = 1958 QE = A905 CG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-30 23:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin