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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05530308635183791 3.9981e-08  
a 3.0959359213358 2.5896e-08 au
q 2.924721109738409 1.2641e-07 au
i 18.08555312729968 4.4137e-06 deg
node 190.9201022242683 1.3975e-05 deg
peri 270.1072803647359 6.065e-05 deg
M 233.93002471166 6.429e-05 deg
tp 2459897.279778938231
(2022-Nov-13.77977894)
0.00036078 TDB
period 1989.694372859632
5.45
2.4964e-05
6.835e-08
d
yr
n .180932310464647 2.2701e-09 deg/d
Q 3.267150732933191 2.7328e-08 au
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      7698 days (21.08 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:38:56  

Additional Information
 Earth MOID = 2.01286 au 
 Jupiter MOID = 1.86349 au 
 T_jup = 3.145 
[ 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 14.91   n/a E2021B55  
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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