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18332 (1987 ON)
Classification: Main-belt Asteroid          SPK-ID: 2018332
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1990605380497751 4.1067e-08  
a 2.598011376743119 1.3439e-08 au
q 2.080849834229197 1.0806e-07 au
i 13.95145701155974 4.5896e-06 deg
node 158.208136107862 1.8533e-05 deg
peri 154.7991930525199 2.1478e-05 deg
M 304.5945067659554 1.3493e-05 deg
tp 2459235.902095391285
(2021-Jan-21.40209539)
5.8206e-05 TDB
period 1529.537043969316
4.19
1.1868e-05
3.249e-08
d
yr
n .2353653358180594 1.8263e-09 deg/d
Q 3.115172919257041 1.6114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1214  
   data-arc span      11879 days (32.52 yr)  
   first obs. used      1987-07-19  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55557  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:23:40  

Additional Information
 Earth MOID = 1.07596 au 
 Jupiter MOID = 2.25786 au 
 T_jup = 3.347 
[ 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 14.1   n/a MPO435869  
diameter diameter 6.502 km 0.500 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18332 (1987 ON)          Discovered 1987-Jul-19 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 ON = 1995 KU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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