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JPL Small-Body Database Browser
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20188 (1997 AC18)
Classification: Main-belt Asteroid          SPK-ID: 2020188
[ 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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09603782999311161 3.5987e-08  
a 2.594353182686738 1.1524e-08 au
q 2.345197132785781 9.291e-08 au
i 8.626548764296562 4.2873e-06 deg
node 101.6268483987456 2.7631e-05 deg
peri 107.7753246957881 3.6512e-05 deg
M 55.05868679933052 2.4006e-05 deg
tp 2458367.065295439575
(2018-Sep-05.56529544)		 0.00010147 TDB
period 1526.307627859638
4.18		 1.017e-05
2.784e-08		 d
yr
n .2358633301891002 1.5715e-09 deg/d
Q 2.843509232587695 1.2631e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1551  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4821  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:22:16  

Additional Information
 Earth MOID = 1.35641 au 
 Jupiter MOID = 2.16902 au 
 T_jup = 3.395 
[ 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 14.0   n/a MPO449099  
diameter diameter 4.830 km 0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.229   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20188 (1997 AC18)          Discovered 1997-Jan-15 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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