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19140 Jansmit (1989 RJ2)
Classification: Main-belt Asteroid          SPK-ID: 2019140
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2546047625702192 1.9073e-08  
a 2.323479279685461 1.1445e-08 au
q 1.73191038934432 4.4352e-08 au
i 21.63165448886926 6.3024e-07 deg
node 249.8906438108426 9.198e-07 deg
peri 131.7195873570509 2.2459e-06 deg
M 337.3389319376105 6.1745e-06 deg
tp 2459477.930013561585
(2021-Sep-20.43001356)
2.2749e-05 TDB
period 1293.619735903993
3.54
9.5578e-06
2.617e-08
d
yr
n .2782888897009821 2.0561e-09 deg/d
Q 2.915048170026602 1.4358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1208  
   data-arc span      24208 days (66.28 yr)  
   first obs. used      1955-03-19  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47311  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:45:34  

Additional Information
 Earth MOID = .796251 au 
 Jupiter MOID = 2.65981 au 
 T_jup = 3.441 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.16   n/a MPCxxxxx  
diameter diameter 3.958 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19140 Jansmit           Discovered 1989 Sept. 2 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Jan Smit (b. 1948) has made important contributions to geology and paleontology by establishing the sequence of impact-generated events that occurred 65 million years ago, including ejecta fallout, tsunami propagation, geochemical disturbances and extinction of foraminifera and dinosaurs.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1989 RJ2 = 1975 VE9 = 1999 JK122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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