Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
17681 Tweedledum (1997 AQ6)
Classification: Inner Main-belt Asteroid          SPK-ID: 2017681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02985878710327011 5.8676e-08  
a 1.825237916203098 4.391e-09 au
q 1.770738525850374 1.0673e-07 au
i 24.38142709466885 5.2603e-06 deg
node 68.18303520913929 7.2028e-06 deg
peri 7.446955575123678 6.4986e-05 deg
M 161.2487832893638 6.5647e-05 deg
tp 2458597.066836899434
(2019-Apr-23.56683690)
0.00016345 TDB
period 900.694788224078
2.47
3.2502e-06
8.899e-09
d
yr
n .3996914434353737 1.4423e-09 deg/d
Q 1.879737306555823 4.5221e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2432  
   data-arc span      11741 days (32.15 yr)  
   first obs. used      1988-04-24  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:13:40  

Additional Information
 Earth MOID = .785388 au 
 Jupiter MOID = 3.24223 au 
 T_jup = 3.929 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457100.5 (2015-Mar-19.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02993294675432199 5.8605e-08  
q 1.770535717667934 1.0659e-07 au
tp 2456795.953251429859
(2014-May-18.45325143)
0.00015996 TDB
node 68.19842931872211 7.2048e-06 deg
peri 7.539672751774106 6.4969e-05 deg
i 24.37864755826126 5.2599e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2432  
   data-arc span      11741 days (32.15 yr)  
   first obs. used      1988-04-24  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:13:40  

Additional Information
 Jupiter MOID = 3.24223 au 
 T_jup = 3.929 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.434511052397267E-15 -6.241667374823224E-15 -2.877087783191423E-12 4.199198897938087E-14 -1.31639232309224E-12 5.515876402921139E-15
q -6.241667374823224E-15 1.136121347152863E-14 5.598521181908494E-12 -7.656862629950795E-14 2.540830048945438E-12 -1.039294989659822E-14
tp -2.877087783191423E-12 5.598521181908494E-12 2.558670960465712E-8 -5.180970315151955E-11 1.032326739303482E-8 -3.334049037774961E-11
node 4.199198897938087E-14 -7.656862629950795E-14 -5.180970315151955E-11 5.190919203219438E-11 -6.907151378732875E-11 -1.260200647041558E-11
peri -1.31639232309224E-12 2.540830048945438E-12 1.032326739303482E-8 -6.907151378732875E-11 4.220907479967431E-9 -1.963332595735313E-12
i 5.515876402921139E-15 -1.039294989659822E-14 -3.334049037774961E-11 -1.260200647041558E-11 -1.963332595735313E-12 2.76667137675328E-11

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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 75.2 h n/a LCDB (Rev. 2019-August); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-03 17:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin