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118428 (1999 TG157)
Classification: Main-belt Asteroid          SPK-ID: 2118428
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05478732097856323 4.3233e-08  
a 3.098481210371848 2.9153e-08 au
q 2.928723725753159 1.3243e-07 au
i 18.07031941769408 6.5628e-06 deg
node 191.0018719054099 1.5495e-05 deg
peri 269.2487225847966 6.7159e-05 deg
M 198.5861300807121 6.8663e-05 deg
tp 2459893.723368005234
(2022-Nov-10.22336801)
0.00038467 TDB
period 1992.148584521732
5.45
2.8115e-05
7.697e-08
d
yr
n .1807094123385518 2.5504e-09 deg/d
Q 3.268238694990537 3.075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      554  
   data-arc span      7505 days (20.55 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:20:27  

Additional Information
 Earth MOID = 2.01617 au 
 Jupiter MOID = 1.86446 au 
 T_jup = 3.144 
[ 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 14.9   n/a MPO436569  
diameter diameter 6.409 km 0.468 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118428 (1999 TG157)          Discovered 1999-Oct-09 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1999 TG157 = 2002 EA145 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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