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17971 Samuelhowell (1999 JZ50)
Classification: Main-belt Asteroid          SPK-ID: 2017971
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685509499614044 3.3268e-08  
a 2.268745892381533 7.7418e-09 au
q 1.886346616999591 7.6605e-08 au
i 2.93846629427503 3.7058e-06 deg
node 128.4165226017721 8.5653e-05 deg
peri 167.5920030663656 8.7045e-05 deg
M 11.73778617229451 1.7908e-05 deg
tp 2458959.803139836322
(2020-Apr-20.30313984)
6.2013e-05 TDB
period 1248.179975667421
3.42
6.3889e-06
1.749e-08
d
yr
n .2884199450544001 1.4763e-09 deg/d
Q 2.651145167763474 9.0467e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1739  
   data-arc span      9876 days (27.04 yr)  
   first obs. used      1992-04-23  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50561  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:33:55  

Additional Information
 Earth MOID = .870543 au 
 Jupiter MOID = 2.53951 au 
 T_jup = 3.594 
[ 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 14.5   n/a MPO384908  
diameter diameter 3.392 km 0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.185   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17971 Samuelhowell           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Samuel James Amberson Howell (b. 1986) was awarded first place and Best in Category in the 2003 Intel International Science and Engineering Fair for his biochemistry project. He attends the Saginaw Arts and Sciences Academy, Saginaw, Michigan, 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 JZ50 = 1992 HU = 1997 YX20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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