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JPL Small-Body Database Browser
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91888 Tomskilling (1999 UA51)
Classification: Main-belt Asteroid          SPK-ID: 2091888
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09453136801949527 4.6493e-08  
a 3.113904373421112 2.6819e-08 au
q 2.819542733119725 1.3821e-07 au
i 11.65420736358548 5.1311e-06 deg
node 242.5593931848076 2.4711e-05 deg
peri 211.865215809999 3.8213e-05 deg
M 200.3200647070766 3.089e-05 deg
tp 2459890.734008829586
0.00017656 TDB
period 2007.041414381472
n .1793684960461787 2.3173e-09 deg/d
Q 3.408266013722499 2.9354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      845  
   data-arc span      7537 days (20.64 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55829  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:44:04  

Additional Information
 Earth MOID = 1.84316 au 
 Jupiter MOID = 1.87472 au 
 T_jup = 3.180 
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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 14.2   n/a MPO400846  
diameter diameter 4.334 km 0.951 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 9.657 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 0.284   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

91888 Tomskilling           Discovered 1999 Oct. 31 by the Catalina Sky Survey.
Thomas (Tom) Ethelbert Skilling, III (b. 1952) is a meteorologist on WGN-TV in Chicago who is revered for the accuracy of his forecasts. He conducts annual free seminars at Fermilab on meteorology that are attended by several thousand people. He also includes much astronomical information in his weather reports.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-10-08Last Updated: 2015-01-12

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Alternate Designations
 1999 UA51 = 2000 WG172 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Jun-01 23:49 UT
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