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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04870217976699914 3.1663e-08  
a 3.145578698629442 1.3907e-08 au
q 2.992382159377548 1.0652e-07 au
i 16.12287895165709 3.12e-06 deg
node 317.0975811289226 1.4703e-05 deg
peri 138.1826549300526 5.046e-05 deg
M 277.5631685964943 4.6982e-05 deg
tp 2459467.125050012678
(2021-Sep-09.62505001)
0.00026577 TDB
period 2037.742294852692
5.58
1.3513e-05
3.7e-08
d
yr
n .1766661078338291 1.1716e-09 deg/d
Q 3.298775237881336 1.4584e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2731  
   data-arc span      42266 days (115.72 yr)  
   first obs. used      1905-02-09  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37264  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:08  

Additional Information
 Earth MOID = 2.02489 au 
 Jupiter MOID = 1.79908 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 10.9   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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Jan-03 20:59 00:02 Jupiter 1.93555682882731 1.93555570465768 1.93555795301477 5.13866225037974 5.05278399649833 2415753.374012587 2.1407279695677 309.024303508043 11.917334002453 79.625012067107 5810350.85727653 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
1986-Apr-28 23:56 < 00:01 Jupiter 1.87869202124702 1.87869154688246 1.87869249561382 5.21565892966181 5.12848739244493 2446549.497303992 0.618184258475859 173.232309392321 18.3191656440933 85.0798714347092 5173297.10099315 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
1996-Dec-20 03:32 < 00:01 Jupiter 1.92271571550053 1.92271533319843 1.92271609780351 5.19788517630093 5.11243008756209 2450437.647512340 0.413953285160274 90.5294163841477 11.8369503816999 80.890140118612 5748869.07608188 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
2081-Apr-15 13:09 00:01 Jupiter 1.88862370806528 1.88862306714728 1.88862434898628 5.13252939059611 5.04439140528451 2481235.048192910 1.24407382003393 191.758092881599 24.5264026242223 83.721462779991 5022436.35373404 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
2091-Dec-06 22:04 00:01 Jupiter 1.89821787331389 1.89821735821781 1.89821838841611 5.23525592465682 5.14931693279901 2485122.419640300 1.40387464252052 195.450793367077 10.8924705912523 83.0476092051006 6099846.14579567 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
2176-Apr-04 14:14 00:03 Jupiter 1.91058669375551 1.91058542848681 1.91058795903473 5.04915455793611 4.96057451652463 2515922.092922249 3.10378986409021 279.825898221462 35.7216569811018 78.6878289974328 4928403.20199284 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16
2186-Nov-23 08:41 00:03 Jupiter 1.88246303120215 1.88246200701372 1.88246405542633 5.26474758978224 5.17857686942367 2519806.861982327 3.13350247813165 427.403412412955 10.7848167812075 83.1719298005846 6039675.24232741 T 35 CATAB v2.0f-lin.ifort 2020-Nov-13 04:16:16 2020-Nov-13 04:16

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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