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16142 Leung (1999 XC135)
Classification: Mars-crossing Asteroid          SPK-ID: 2016142
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2997578813418837 1.5287e-08  
a 2.242741543387873 4.8553e-09 au
q 1.570462089944498 3.4678e-08 au
i 8.837961185134045 9.1991e-07 deg
node 127.8085681277995 5.9589e-06 deg
peri 197.7865634418632 7.4044e-06 deg
M 172.0441057612431 3.5869e-06 deg
tp 2458614.220692732780
(2019-May-10.72069273)
1.1129e-05 TDB
period 1226.781642313872
3.36
3.9838e-06
1.091e-08
d
yr
n .2934507556870451 9.5294e-10 deg/d
Q 2.915020996831248 6.3107e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2112  
   data-arc span      14018 days (38.38 yr)  
   first obs. used      1982-10-18  
   last obs. used      2021-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46938  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 00:55:33  

Additional Information
 Earth MOID = .558821 au 
 Jupiter MOID = 2.43714 au 
 T_jup = 3.558 
[ 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 14.25   n/a E2020-QM5  
diameter diameter 3.047 km 0.534 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.393   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

16142 Leung           Discovered 1999 Dec. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Named in honor of Albert W. Leung for achievement as a finalist in the 2002 Intel Science Talent Search, a science competition for high school seniors. Albert is a student at the Stuyvesant High School, New York, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020227/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 XC135 = 1982 UB3 = 1995 KB3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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