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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2549286555921456 5.2015e-08  
a 2.322716859958899 1.3118e-08 au
q 1.730589773528368 1.1885e-07 au
i 21.64163943727139 5.6861e-06 deg
node 249.911422183879 1.4716e-05 deg
peri 131.8069806853625 1.8456e-05 deg
M 227.0346661463336 1.4999e-05 deg
tp 2459478.060901117068
(2021-Sep-20.56090112)
5.6213e-05 TDB
period 1292.983061219184
3.54
1.0954e-05
2.999e-08
d
yr
n .2784259212650068 2.3588e-09 deg/d
Q 2.914843946389432 1.6463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      970  
   data-arc span      23399 days (64.06 yr)  
   first obs. used      1955-03-19  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47645  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:54:34  

Additional Information
 Earth MOID = .795334 au 
 Jupiter MOID = 2.65741 au 
 T_jup = 3.441 
[ 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 14.1   n/a MPO365481  
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

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