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18340 (1989 OM)
Classification: Main-belt Asteroid          SPK-ID: 2018340
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2904274476318505 5.8848e-08  
a 2.934499451061718 3.094e-08 au
q 2.082240265412797 1.7749e-07 au
i 17.07458406274373 6.7348e-06 deg
node 25.62248840566683 2.2301e-05 deg
peri 288.9590900514975 2.747e-05 deg
M 319.9604043050041 2.2475e-05 deg
tp 2458804.714539079178
(2019-Nov-17.21453908)
0.00011522 TDB
period 1836.113297160294
5.03
2.9039e-05
7.95e-08
d
yr
n .1960663323754425 3.1009e-09 deg/d
Q 3.78675863671064 3.9926e-08 au
  Orbit Determination Parameters
   # obs. used (total)      792  
   data-arc span      10974 days (30.05 yr)  
   first obs. used      1989-07-29  
   last obs. used      2019-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53495  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:25:49  

Additional Information
 Earth MOID = 1.14037 au 
 Jupiter MOID = 1.94281 au 
 T_jup = 3.147 
[ 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 13.7   n/a MPO400186  
diameter diameter 13.143 km 0.532 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.045   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18340 (1989 OM)          Discovered 1989-Jul-29 by Gilmore, A. C., Kilmartin, P. M. at Lake Tekapo
Reference: 20001111/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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