Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
20157 (1996 TS18)
Classification: Main-belt Asteroid          SPK-ID: 2020157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08664908038496577 3.4453e-08  
a 2.348633076880315 8.7118e-09 au
q 2.145126180606923 8.096e-08 au
i 1.468854259687207 3.8887e-06 deg
node 16.90656818970431 0.00014021 deg
peri 145.8961925826497 0.00014185 deg
M 142.0716538747942 2.1483e-05 deg
tp 2458681.668755629533
(2019-Jul-17.16875563)
7.8018e-05 TDB
period 1314.683421212046
3.60
7.3149e-06
2.003e-08
d
yr
n .2738301816174918 1.5236e-09 deg/d
Q 2.552139973153707 9.4667e-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 = 1.15268 au 
 Jupiter MOID = 2.4178 au 
 T_jup = 3.554 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456642.5 (2013-Dec-16.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08672965898240113 3.4337e-08  
q 2.14389088025745 8.0652e-08 au
tp 2456053.454479085279
(2012-May-05.95447909)
7.7213e-05 TDB
node 16.97015055406948 0.00014019 deg
peri 145.5686675891083 0.00014185 deg
i 1.469639536245747 3.8878e-06 deg
  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
 Jupiter MOID = 2.4178 au 
 T_jup = 3.554 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.179063075555172E-15 -2.756164313995939E-15 2.132489934052445E-13 -2.127271213887199E-15 7.909065277655675E-14 -6.471864426694232E-17
q -2.756164313995939E-15 6.504680212061871E-15 -5.244902936501642E-13 3.784863354094006E-15 -1.841991291984422E-13 1.802652783350765E-16
tp 2.132489934052445E-13 -5.244902936501642E-13 5.961911949094153E-9 -1.212174393623997E-11 1.676857876259068E-9 6.144059122373875E-13
node -2.127271213887199E-15 3.784863354094006E-15 -1.212174393623997E-11 1.965414472599017E-8 -1.965099007038807E-8 -2.124429277011489E-11
peri 7.909065277655675E-14 -1.841991291984422E-13 1.676857876259068E-9 -1.965099007038807E-8 2.012092206944979E-8 2.141572988575394E-11
i -6.471864426694232E-17 1.802652783350765E-16 6.144059122373875E-13 -2.124429277011489E-11 2.141572988575394E-11 1.51147544834549E-11

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-12 22:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin