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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04886514394930928 1.9964e-08  
a 3.146117298154202 1.0862e-08 au
q 2.992381823498485 6.6027e-08 au
i 16.12277979088313 2.7395e-07 deg
node 317.0969018975447 9.6952e-07 deg
peri 138.0553708313158 2.5142e-05 deg
M 313.0324872755738 2.2658e-05 deg
tp 2459466.422970661217
(2021-Sep-08.92297066)
0.00012794 TDB
period 2038.26568376594
5.58
1.0556e-05
2.89e-08
d
yr
n .1766207432462175 9.1467e-10 deg/d
Q 3.299852772809919 1.1393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3099  
   data-arc span      42408 days (116.11 yr)  
   first obs. used      1905-02-09  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35974  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:42:30  

Additional Information
 Earth MOID = 2.02491 au 
 Jupiter MOID = 1.79799 au 
 T_jup = 3.146 
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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 10.97   n/a E2021B10  
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

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Alternate Designations
 1953 TD3 = 1944 DA = 1958 QE = A905 CG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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