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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1898764653529264 4.4968e-08  
a 2.368018575505251 9.6056e-09 au
q 1.918387578498242 1.0615e-07 au
i 26.48822764742113 5.5637e-06 deg
node 171.1973337052537 8.1917e-06 deg
peri 218.075968520422 1.3755e-05 deg
M 141.3842924020798 1.175e-05 deg
tp 2458477.773225071413
(2018-Dec-25.27322507)
4.2714e-05 TDB
period 1330.993958219386
3.64
8.0985e-06
2.217e-08
d
yr
n .2704745560840943 1.6457e-09 deg/d
Q 2.81764957251226 1.1429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1587  
   data-arc span      14653 days (40.12 yr)  
   first obs. used      1980-03-16  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:53:30  

Additional Information
 Earth MOID = .955343 au 
 Jupiter MOID = 2.71838 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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