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18012 Marsland (1999 JM114)
Classification: Main-belt Asteroid          SPK-ID: 2018012
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1141099817306537 1.1456e-08  
a 2.319312818453425 6.2954e-09 au
q 2.054656075112034 2.7756e-08 au
i 5.156772726758458 5.1221e-07 deg
node 236.5666795600816 5.5873e-06 deg
peri 346.2244917744451 1.0483e-05 deg
M 50.7629640372365 9.3724e-06 deg
tp 2459018.579395262637
(2020-Jun-18.07939526)
3.3588e-05 TDB
period 1290.141719412017
3.53
5.2528e-06
1.438e-08
d
yr
n .2790391122023946 1.1361e-09 deg/d
Q 2.583969561794816 7.0138e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2565  
   data-arc span      11868 days (32.49 yr)  
   first obs. used      1988-03-10  
   last obs. used      2020-09-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46398  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:19:57  

Additional Information
 Earth MOID = 1.0449 au 
 Jupiter MOID = 2.39687 au 
 T_jup = 3.565 
[ 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 14.03   n/a E2021B10  
diameter diameter 3.870 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.356   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18012 Marsland           Discovered 1999 May 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kyle Anthony Marsland (b. 1985) was awarded first place in the 2003 Intel International Science and Engineering Fair for his environmental science team project. He also received the MILSET Expo-Sciences International Award. He attends the Hamilton High School, Chandler, Arizona, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

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Alternate Designations
 1999 JM114 = 1988 ET2 = 1992 LM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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