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18413 Adamspencer (1993 LD1)
Classification: Main-belt Asteroid          SPK-ID: 2018413
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .122940436564567 5.3811e-08  
a 3.053624914976369 2.4323e-08 au
q 2.678210934824735 1.7322e-07 au
i 11.19813701266575 5.7398e-06 deg
node 335.375966595637 2.3167e-05 deg
peri 338.2530542582743 3.009e-05 deg
M 346.4703042864892 2.2572e-05 deg
tp 2459273.749976728848
(2021-Feb-28.24997673)
0.00012269 TDB
period 1949.045431676053
5.34
2.3287e-05
6.376e-08
d
yr
n .1847058022092503 2.2068e-09 deg/d
Q 3.429038895128003 2.7313e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1032  
   data-arc span      17126 days (46.89 yr)  
   first obs. used      1973-09-20  
   last obs. used      2020-08-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:28:46  

Additional Information
 Earth MOID = 1.66646 au 
 Jupiter MOID = 1.90751 au 
 T_jup = 3.196 
[ 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 13.90   n/a MPCxxxxx  
diameter diameter 5.858 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18413 Adamspencer           Discovered 1993 June 13 by R. H. McNaught at Siding Spring Observatory.
Adam Spencer (b. 1969) is an Australian mathematics communicator, television and radio presenter. Spencer's career has moved from mathematics research to stand-up pure maths comedy and "The Sleek Geeks" science comedy duo. He holds positions promoting the understanding and development of science.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

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Alternate Designations
 1993 LD1 = 5107 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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