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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0606282186256203 3.8317e-08  
a 2.353710928291156 7.9512e-09 au
q 2.211009627549208 9.0314e-08 au
i 3.747870551003844 4.189e-06 deg
node 202.0210906325765 3.9393e-05 deg
peri 10.83732446701922 4.7e-05 deg
M 61.84529771133701 2.4098e-05 deg
tp 2458973.914405124012
(2020-May-04.41440512)
8.8731e-05 TDB
period 1318.949332835091
3.61
6.6834e-06
1.83e-08
d
yr
n .2729445256446488 1.3831e-09 deg/d
Q 2.496412229033104 8.4333e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      9207 days (25.21 yr)  
   first obs. used      1995-06-22  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49816  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:12  

Additional Information
 Earth MOID = 1.20369 au 
 Jupiter MOID = 2.46414 au 
 T_jup = 3.550 
[ 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 15.07   n/a E2021B10  
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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