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JPL Small-Body Database Browser
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20157 (1996 TS18)
Classification: Main-belt Asteroid          SPK-ID: 2020157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08646577897561204 3.4943e-08  
a 2.347321509149783 8.7528e-09 au
q 2.144358526354937 8.2202e-08 au
i 1.469022231277186 3.9442e-06 deg
node 16.95862300332881 0.00014054 deg
peri 145.2599859303931 0.00014222 deg
M 338.2930064154687 2.1496e-05 deg
tp 2458679.705341629933
(2019-Jul-15.20534163)
7.8502e-05 TDB
period 1313.582319713554
3.60
7.3472e-06
2.012e-08
d
yr
n .2740597179158923 1.5329e-09 deg/d
Q 2.550284491944628 9.5096e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      11689 days (32.00 yr)  
   first obs. used      1987-04-01  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55644  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:37:17  

Additional Information
 Earth MOID = 1.15286 au 
 Jupiter MOID = 2.42266 au 
 T_jup = 3.555 
[ 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 15.5   n/a MPO319336  
diameter diameter 2.594 km 0.634 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.199   0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20157 (1996 TS18)          Discovered 1996-Oct-04 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 TS18 = 1987 GM = 1998 FY74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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