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20440 McClintock (1999 JO31)
Classification: Main-belt Asteroid          SPK-ID: 2020440
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1893102192287063 3.958e-08  
a 2.429476971505302 7.5723e-09 au
q 1.96955215341854 9.472e-08 au
i .8597436918995265 3.9694e-06 deg
node 185.9280875128329 0.00017937 deg
peri 170.5261622544211 0.00017952 deg
M 141.0522556652991 7.3013e-06 deg
tp 2458658.567568223928
(2019-Jun-24.06756822)
2.7382e-05 TDB
period 1383.144668755427
3.79
6.4666e-06
1.77e-08
d
yr
n .2602764614087209 1.2169e-09 deg/d
Q 2.889401789592064 9.0058e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1990  
   data-arc span      15894 days (43.52 yr)  
   first obs. used      1977-09-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:02  

Additional Information
 Earth MOID = .963554 au 
 Jupiter MOID = 2.55622 au 
 T_jup = 3.484 
[ 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 14.49   n/a E2021B10  
diameter diameter 3.669 km 0.699 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.274   0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20440 McClintock           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Shannon Noel McClintock (b. 1989) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her engineering project. She attends the Muirlands Middle School, La Jolla, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

Alternate Designations
 1999 JO31 = 1977 RM1 = 1981 TD3 = 1981 UT19 = 2000 QA128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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