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3721 Widorn (1982 TU)
Classification: Main-belt Asteroid          SPK-ID: 2003721
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08538099152475075 1.7561e-08  
a 3.019271578185394 1.3597e-08 au
q 2.761483177157427 5.1132e-08 au
i 8.768090940192575 6.1907e-07 deg
node 313.9403542892778 4.4036e-06 deg
peri 150.8776382483979 1.7008e-05 deg
M 40.35213882664985 1.3884e-05 deg
tp 2458985.709161529623
(2020-May-16.20916153)
7.3667e-05 TDB
period 1916.247913933819
5.25
1.2945e-05
3.544e-08
d
yr
n .1878671321086867 1.2691e-09 deg/d
Q 3.277059979213362 1.4758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2564  
   data-arc span      14481 days (39.65 yr)  
   first obs. used      1981-07-30  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4288  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:10:20  

Additional Information
 Earth MOID = 1.78182 au 
 Jupiter MOID = 1.82672 au 
 T_jup = 3.224 
[ 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 11.97   n/a E2021B10  
diameter diameter 14.186 km 0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 84.960 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.186   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3721 Widorn (1982 TU)          Discovered 1982-Oct-13 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1982 TU = 1951 YG2 = 1971 SD1 = 1981 ON = 1982 UK9 = 1982 VZ9 = 1984 DV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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