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JPL Small-Body Database Browser
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56261 (1999 JT87)
Classification: Main-belt Asteroid          SPK-ID: 2056261
[ 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .144331197095698 4.5774e-08  
a 2.689786042195241 1.7031e-08 au
q 2.301566002793903 1.3033e-07 au
i 12.41355380307979 5.2421e-06 deg
node 81.39943417958926 1.9123e-05 deg
peri 70.03905780069458 2.7023e-05 deg
M 237.3825579556286 1.8814e-05 deg
tp 2459149.313494504815
(2020-Oct-26.81349450)		 8.6326e-05 TDB
period 1611.294891882003
4.41		 1.5303e-05
4.19e-08		 d
yr
n .2234227898404851 2.1219e-09 deg/d
Q 3.07800608159658 1.9489e-08 au
   Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      8035 days (22.00 yr)  
   first obs. used      1997-12-04  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57668  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 05:42:27  

Additional Information
 Earth MOID = 1.34802 au 
 Jupiter MOID = 2.06286 au 
 T_jup = 3.324 
[ 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 MPO359126  
diameter diameter 6.356 km 0.812 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.053   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

56261 (1999 JT87)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20030318/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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