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18369 (1991 LM)
Classification: Main-belt Asteroid          SPK-ID: 2018369
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08773630088849098 2.1132e-08  
a 2.56962179156967 1.0862e-08 au
q 2.34417268089489 5.5776e-08 au
i 16.54704382372534 4.1887e-07 deg
node 103.3764261391847 2.9451e-06 deg
peri 193.0595938026469 9.8494e-06 deg
M 29.51709686116579 7.8268e-06 deg
tp 2459077.140279563483
(2020-Aug-15.64027956)
3.2705e-05 TDB
period 1504.534797782694
4.12
9.5395e-06
2.612e-08
d
yr
n .2392766192782975 1.5171e-09 deg/d
Q 2.79507090224445 1.1815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1959  
   data-arc span      10767 days (29.48 yr)  
   first obs. used      1991-06-13  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42719  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:27:40  

Additional Information
 Earth MOID = 1.32809 au 
 Jupiter MOID = 2.38115 au 
 T_jup = 3.367 
[ 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 12.99   n/a E2021B10  
diameter diameter 7.030 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.297   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18369 (1991 LM)          Discovered 1991-Jun-13 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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