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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08727659138472767 3.4521e-08  
a 2.347447557065828 8.7884e-09 au
q 2.142570335830717 8.1176e-08 au
i 1.469273957151496 3.8911e-06 deg
node 16.8873448463539 0.00014012 deg
peri 146.0698801498685 0.00014174 deg
M 195.5661836711456 2.1343e-05 deg
tp 2459996.540978512707
(2023-Feb-21.04097851)
7.856e-05 TDB
period 1313.688127462556
3.60
7.3773e-06
2.02e-08
d
yr
n .2740376444562646 1.5389e-09 deg/d
Q 2.55232477830094 9.5554e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1181  
   data-arc span      12131 days (33.21 yr)  
   first obs. used      1987-04-01  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:20  

Additional Information
 Earth MOID = 1.15119 au 
 Jupiter MOID = 2.41677 au 
 T_jup = 3.554 
[ 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 15.55   n/a E2021B10  
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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