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JPL Small-Body Database Browser
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20189 (1997 BS2)
Classification: Main-belt Asteroid          SPK-ID: 2020189
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .1721434462355275 4.3818e-08  
a 2.609467914338851 1.3926e-08 au
q 2.160265114723527 1.1183e-07 au
i 3.393396310638558 7.521e-06 deg
node 358.3622801008466 7.7639e-05 deg
peri 96.68729717080066 8.2859e-05 deg
M 132.0697917713573 2.5624e-05 deg
tp 2458035.657507208444
(2017-Oct-09.15750721)		 0.00010844 TDB
period 1539.665465339669
4.22		 1.2325e-05
3.374e-08		 d
yr
n .2338170259086635 1.8717e-09 deg/d
Q 3.058670713954175 1.6323e-08 au
   Orbit Determination Parameters
   # obs. used (total)      713  
   data-arc span      9715 days (26.60 yr)  
   first obs. used      1991-10-09  
   last obs. used      2018-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51316  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:58:57  

Additional Information
 Earth MOID = 1.18025 au 
 Jupiter MOID = 2.12553 au 
 T_jup = 3.387 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO389781  
diameter diameter 2.450 km 0.662 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.323   0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20189 (1997 BS2)          Discovered 1997-Jan-30 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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