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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2549286677416662 4.8254e-08  
a 2.322716865429236 1.228e-08 au
q 1.730589749384262 1.113e-07 au
i 21.64163664886919 5.4673e-06 deg
node 249.911419146231 1.2283e-05 deg
peri 131.8069923741704 1.6359e-05 deg
M 227.0346555948354 1.4981e-05 deg
tp 2459478.060940701124
(2021-Sep-20.56094070)
5.6116e-05 TDB
period 1292.98306578693
3.54
1.0254e-05
2.807e-08
d
yr
n .2784259202814062 2.208e-09 deg/d
Q 2.914843981474211 1.5411e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      23912 days (65.47 yr)  
   first obs. used      1955-03-19  
   last obs. used      2020-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47943  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:10:43  

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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