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20613 Chibaken (1999 RE240)
Classification: Main-belt Asteroid          SPK-ID: 2020613
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1091750487552998 5.5921e-08  
a 3.054965273140646 2.4438e-08 au
q 2.721439290499768 1.7311e-07 au
i 12.40911033986722 5.8651e-06 deg
node 130.530769149845 2.5953e-05 deg
peri 213.1074750587217 3.5121e-05 deg
M 336.6841752633385 2.5893e-05 deg
tp 2459126.815348596140
(2020-Oct-04.31534860)		 0.00014079 TDB
period 1950.328843530394
5.34		 2.3403e-05
6.407e-08		 d
yr
n .184584256749413 2.2149e-09 deg/d
Q 3.388491255781524 2.7106e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1078  
   data-arc span      9426 days (25.81 yr)  
   first obs. used      1993-07-20  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5471  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:53:58  

Additional Information
 Earth MOID = 1.72114 au 
 Jupiter MOID = 1.9922 au 
 T_jup = 3.191 
[ 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 13.6   n/a MPO350965  
diameter diameter 6.157 km 0.815 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.186   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20613 Chibaken           Discovered 1999 Sept. 11 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Chiba prefecture is located east of Tokyo. In 2011, some areas were damaged during the Tohoku earthquake.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

Alternate Designations
 1999 RE240 = 1993 OF2 = 1996 AK9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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