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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 ]

[ show orbit diagram ]
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
(2022-Nov-07.23400883)
0.00017656 TDB
period 2007.041414381472
5.49
2.5929e-05
7.099e-08
d
yr
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 
[ 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 14.2   n/a MPO400846  
diameter diameter 4.334 km 0.951 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1949-Apr-04 05:05 00:02 Jupiter 1.87706168143527 1.87706101367268 1.87706234919797 3.32839666654566 3.18994138512028 2433010.712055563 2.44742337730014 117.780568959451 37.6344775724626 -88.1775393174766 2190530.44154537 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44
2020-Mar-30 07:28 < 00:01 Jupiter 1.87505088201322 1.87505032440727 1.87505143961918 3.44542194631012 3.3117165068909 2458938.810903240 0.31689736935529 107.802504338691 25.0380512927031 87.8322177393698 2792842.20025449 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44
2081-May-09 22:14 00:03 Jupiter 1.98969333996923 1.98969270933852 1.98969397059984 2.77442738965451 2.61649330734187 2481259.426301538 2.7420684618781 152.850989314195 20.7655635486862 -82.1117906887041 2350352.9247968 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44
2091-Mar-27 09:12 00:03 Jupiter 1.88176585188929 1.88176527286461 1.88176643091494 3.56866249238459 3.44021943833526 2484867.883541302 2.69497347573945 189.211767618837 23.2202613945493 88.6099983937186 1987066.30884531 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44
2152-May-01 02:40 00:06 Jupiter 1.97108516599098 1.97108439406826 1.97108593791997 2.55619052804481 2.38215492841874 2507182.611247016 5.71981106085955 348.759946485678 21.5357139197939 -85.361089425166 2462891.81676098 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44
2162-Mar-26 06:04 00:05 Jupiter 1.89785921281477 1.89785838635 1.89786003929518 3.69382052877924 3.57095249504768 2510798.752894293 5.13353096935184 359.621967267902 22.4623124126736 87.1600994810204 2113522.33518627 T 20 CATAB v2.0f-lin.ifort 2020-May-20 16:44:21 2020-May-20 16:44

Alternate Designations
 1999 UA51 = 2000 WG172 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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