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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1900252215377821 9.6427e-09  
a 2.367700230796491 9.5169e-09 au
q 1.91777746990433 2.1104e-08 au
i 26.49009854876261 1.3508e-06 deg
node 171.1992296623695 2.8992e-06 deg
peri 218.0518971175024 7.5282e-06 deg
M 195.5131934896179 8.2914e-06 deg
tp 2459808.518886569848
(2022-Aug-17.01888657)
3.2412e-05 TDB
period 1330.725568870046
3.64
8.0232e-06
2.197e-08
d
yr
n .2705291071439211 1.6311e-09 deg/d
Q 2.817622991688652 1.1325e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1658  
   data-arc span      14955 days (40.94 yr)  
   first obs. used      1980-03-16  
   last obs. used      2021-02-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47123  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:38:28  

Additional Information
 Earth MOID = .953206 au 
 Jupiter MOID = 2.71938 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 14.28   n/a E2021B10  
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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