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JPL Small-Body Database Browser
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56260 (1999 JL87)
Classification: Main-belt Asteroid          SPK-ID: 2056260
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1527992781681203 4.1361e-08  
a 2.697920395379101 1.5259e-08 au
q 2.285680106410125 1.16e-07 au
i 14.27820582696487 5.0711e-06 deg
node 75.02283014524389 2.0071e-05 deg
peri 50.55560483073376 2.7501e-05 deg
M 254.4628739538531 1.8549e-05 deg
tp 2459075.009472374661
(2020-Aug-13.50947237)
8.4726e-05 TDB
period 1618.609644346237
4.43
1.3732e-05
3.76e-08
d
yr
n .2224131069881308 1.8869e-09 deg/d
Q 3.110160684348077 1.7591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      8042 days (22.02 yr)  
   first obs. used      1997-11-29  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55492  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 05:42:26  

Additional Information
 Earth MOID = 1.32912 au 
 Jupiter MOID = 2.1176 au 
 T_jup = 3.308 
[ 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 14.6   n/a MPO502529  
diameter diameter 4.065 km 1.494 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.223   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56260 (1999 JL87)          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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