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18807 (1999 JL85)
Classification: Main-belt Asteroid          SPK-ID: 2018807
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1897382116794287 5.6941e-08  
a 2.368470990121379 1.1222e-08 au
q 1.919081540041143 1.3753e-07 au
i 26.48425126029175 5.9233e-06 deg
node 171.2035888901432 1.0936e-05 deg
peri 218.1333066962557 1.5968e-05 deg
M 33.15788252548849 1.1673e-05 deg
tp 2458477.873362663972
(2018-Dec-25.37336266)
4.3066e-05 TDB
period 1331.3754099658
3.65
9.462e-06
2.591e-08
d
yr
n .2703970625454525 1.9217e-09 deg/d
Q 2.817860440201616 1.3351e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1354  
   data-arc span      14510 days (39.73 yr)  
   first obs. used      1980-03-16  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49288  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:31:44  

Additional Information
 Earth MOID = .955328 au 
 Jupiter MOID = 2.71491 au 
 T_jup = 3.383 
[ 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 14.3   n/a MPO452437  
diameter diameter 7.812 km 0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18807 (1999 JL85)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JL85 = 1980 FJ = 1989 SS14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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