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26993 Littlewood (1997 XC1)
Classification: Main-belt Asteroid          SPK-ID: 2026993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08090365367688471 4.2501e-08  
a 2.97572030959405 1.781e-08 au
q 2.734973664227381 1.3219e-07 au
i 2.285800000789845 4.6463e-06 deg
node 121.6299040329753 0.00014406 deg
peri 294.2851519337711 0.00014901 deg
M 134.8088442811732 3.7551e-05 deg
tp 2458298.394338149961
(2018-Jun-28.89433815)
0.00019389 TDB
period 1874.936615722571
5.13
1.6833e-05
4.609e-08
d
yr
n .1920064907694289 1.7238e-09 deg/d
Q 3.216466954960719 1.9251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1018  
   data-arc span      9461 days (25.90 yr)  
   first obs. used      1994-03-05  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56794  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 00:55:02  

Additional Information
 Earth MOID = 1.74768 au 
 Jupiter MOID = 2.05467 au 
 T_jup = 3.255 
[ 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 14.3   n/a PDS3 (MPO 14520)  
diameter diameter 4.007 km 0.700 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.886 h n/a LCDB (Rev. 2019-August); 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 0.213   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26993 Littlewood           Discovered 1997 Dec. 3 by P. G. Comba at Prescott.
John Edensor Littlewood (1885-1977) was an English mathematician mainly associated with Trinity College, Cambridge. Most of his work in analysis was done in collaboration with G. H. Hardy and extended over Diophantine approximations, number theory, the Riemann zeta function, inequalities and Fourier series.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020128/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1997 XC1 = 2000 JY13 
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