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5993 Tammydickinson (1981 EU22)
Classification: Main-belt Asteroid          SPK-ID: 2005993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06811567457666814 2.1046e-08  
a 2.176873884832666 6.0422e-09 au
q 2.028594651698957 4.703e-08 au
i 1.925353623756992 1.148e-06 deg
node 339.5644972826778 2.2738e-05 deg
peri 197.9902128204564 2.9059e-05 deg
M 137.0430322929686 1.4801e-05 deg
tp 2458753.916380179770
(2019-Sep-27.41638018)
4.8067e-05 TDB
period 1173.135915378688
3.21
4.8843e-06
1.337e-08
d
yr
n .306869813873009 1.2776e-09 deg/d
Q 2.325153117966376 6.4538e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2259  
   data-arc span      14457 days (39.58 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4721  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:12:41  

Additional Information
 Earth MOID = 1.03168 au 
 Jupiter MOID = 2.63499 au 
 T_jup = 3.680 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.96   n/a E2021B10  
rotation period rot_per 9.44711 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]

5993 Tammydickinson           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Tamara Dickinson (b. 1959) has been actively involved in research on lunar rocks and aubritic meteorites. She has been a staunch supporter of planetary science in a number of project management roles at NASA, the National Science Foundation and the National Research Council.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1981 EU22 = 1989 YN8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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