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JPL Small-Body Database Browser
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20145 (1996 SS4)
Classification: Main-belt Asteroid          SPK-ID: 2020145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06047397985364607 4.0309e-08  
a 2.353389028468573 9.8648e-09 au
q 2.211070227773173 9.6771e-08 au
i 3.748213158776514 4.3555e-06 deg
node 202.0417919444018 5.4774e-05 deg
peri 10.36466648317174 6.4343e-05 deg
M 258.4653227599077 3.5693e-05 deg
tp 2458972.421175118401
(2020-May-02.92117512)
0.00013124 TDB
period 1318.678767511318
3.61
8.2913e-06
2.27e-08
d
yr
n .2730005281569911 1.7165e-09 deg/d
Q 2.495707829163973 1.0461e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1307  
   data-arc span      8901 days (24.37 yr)  
   first obs. used      1995-06-22  
   last obs. used      2019-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52009  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:05:36  

Additional Information
 Earth MOID = 1.20506 au 
 Jupiter MOID = 2.46675 au 
 T_jup = 3.551 
[ 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 15.0   n/a MPO358823  
diameter diameter 3.235 km 0.278 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.128   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20145 (1996 SS4)          Discovered 1996-Sep-20 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 SS4 = 1995 MT4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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