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JPL Small-Body Database Browser
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17681 Tweedledum (1997 AQ6)
Classification: Inner Main-belt Asteroid          SPK-ID: 2017681
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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02998876865010189 6.1328e-08  
a 1.825305653971684 5.202e-09 au
q 1.770566984999004 1.1092e-07 au
i 24.38238486068318 5.6125e-06 deg
node 68.1842696613809 9.2886e-06 deg
peri 7.673635085683092 7.9662e-05 deg
M 1.135805418405366 7.6922e-05 deg
tp 2458597.658136194223
0.00019246 TDB
period 900.744928225534
n .3996691945956325 1.7085e-09 deg/d
Q 1.880044322944364 5.358e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2106  
   data-arc span      11524 days (31.55 yr)  
   first obs. used      1988-04-24  
   last obs. used      2019-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35496  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:44:23  

Additional Information
 Earth MOID = .785011 au 
 Jupiter MOID = 3.24257 au 
 T_jup = 3.929 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO344443  
diameter diameter 2.428 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 75.2 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2007) Minor Planet Bull. 34, 32-37.]
geometric albedo albedo 0.520   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

17681 Tweedledum           Discovered 1997 Jan. 6 by T. Urata at the Nihondaira Observatory.
Tweedledum was one of the twins in Lewis Carroll's Through the Looking Glass and what Alice found there. When Alice meets him, he is standing under a tree with his arm round his brother's neck. Like his twin Tweedledee, he gives his name to a minor planet of Hungaria type. The citation was prepared by D. J. Asher.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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