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11821 Coleman (1981 EG44)
Classification: Main-belt Asteroid          SPK-ID: 2011821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04389974589828781 3.7248e-08  
a 3.076633695555659 1.8072e-08 au
q 2.941570258098655 1.0936e-07 au
i 9.593942421301033 4.4465e-06 deg
node 12.20039219844041 2.3929e-05 deg
peri 98.93622261888332 5.9519e-05 deg
M 168.4945512002749 5.4376e-05 deg
tp 2458077.938184171982
(2017-Nov-20.43818417)
0.00029623 TDB
period 1971.115690876684
5.40
1.7367e-05
4.755e-08
d
yr
n .1826376816268377 1.6092e-09 deg/d
Q 3.211697133012662 1.8865e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1474  
   data-arc span      15233 days (41.71 yr)  
   first obs. used      1978-10-03  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47827  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:20:12  

Additional Information
 Earth MOID = 1.97769 au 
 Jupiter MOID = 1.8367 au 
 T_jup = 3.206 
[ 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 13.5   n/a MPO473926  
diameter diameter 7.444 km 0.352 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.183   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11821 Coleman           Discovered 1981 Mar. 6 by S. J. Bus at Siding Spring.
Paul Henry Ikaika Coleman (1955-2018) was the first Native Hawaiian to earn a doctorate in astrophysics for his study of distant galaxies. He was a passionate advocate for astronomy and was dedicated to increasing Native Hawaiian participation in the sciences. Me ou mau k\={u}puna e Paul e ho`okele aku ai i n\=a moana h\={o}k\={u} \=akea.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

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