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JPL Small-Body Database Browser
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17941 Horbatt (1999 JW2)
Classification: Main-belt Asteroid          SPK-ID: 2017941
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1551150393579074 5.6836e-08  
a 2.174675490118741 9.6597e-09 au
q 1.837350615878296 1.2601e-07 au
i 20.27866749573584 6.5355e-06 deg
node 65.81047543123468 1.2163e-05 deg
peri 358.6998909637933 1.9499e-05 deg
M 4.316089780122478 1.796e-05 deg
tp 2458986.456411815216
(2020-May-16.95641182)
5.8392e-05 TDB
period 1171.359263610743
3.21
7.8046e-06
2.137e-08
d
yr
n .3073352567258412 2.0477e-09 deg/d
Q 2.512000364359186 1.1158e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1477  
   data-arc span      10860 days (29.73 yr)  
   first obs. used      1990-05-03  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45409  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:15:31  

Additional Information
 Earth MOID = .851034 au 
 Jupiter MOID = 2.81813 au 
 T_jup = 3.591 
[ 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 14.0   n/a MPO449082  
diameter diameter 3.269 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.499   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

17941 Horbatt           Discovered 1999 May 6 by R. A. Tucker at the Goodricke-Pigott Onservatory.
A skilled mechanical craftsman, Paul Allen Horbatt (b. 1946) has contributed greatly to the development of the instrumentation at Goodricke-Pigott Observatory, near Tucson, where this minor planet was discovered. His familiarity with detector enclosures and vacuum seals greatly speeded the fabrication of the instruments.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

[ 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
1965-Jul-28 22:52 < 00:01 Hebe 0.0380999312631291 0.0380981577673147 0.0381017059884136 8.94028399486034 8.94028397660954 2438970.452857976 0.426121642713809 376.086728028372 31.7054186172159 77.269635792693 175357.2761683 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 22:15:48 2020-Feb-22 22:15
2073-May-19 00:28 < 00:01 Thisb 0.00642353214518282 0.00642050031845884 0.00642657344589591 8.54126477451307 8.54126465023952 2478346.519264371 0.294479328260813 424.90334543338 30.3408100164735 69.5134047273489 29671.805626486 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 22:15:48 2020-Feb-22 22:15
2110-Mar-15 03:39 < 00:01 Iris 0.0476005967065168 0.0475869045204525 0.0476142905044375 10.65822402603 10.6582240146988 2491794.652071460 0.821314213768931 810.733466618146 29.9877974454086 -32.6569315251108 128336.196450729 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 22:15:48 2020-Feb-22 22:15
2135-Jul-23 05:10 < 00:01 Hebe 0.0340372600847947 0.034022271871091 0.0340522534569532 8.76582124306232 8.76582122222652 2501055.715578345 0.811298970385695 997.943877659127 31.1728770789913 -41.5235427552602 108335.484765457 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 22:15:48 2020-Feb-22 22:15

Alternate Designations
 1999 JW2 = 1990 JC1 = 1997 YC7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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