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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682476837118758 2.7284e-08  
a 2.26835834226276 5.9099e-09 au
q 1.88671230534854 6.055e-08 au
i 2.938594979186795 3.139e-06 deg
node 128.4171630050434 6.9349e-05 deg
peri 167.5789312107891 7.044e-05 deg
M 126.0096744092597 1.2246e-05 deg
tp 2458959.715407796677
(2020-Apr-20.21540780)
4.2658e-05 TDB
period 1247.86016574011
3.42
4.8767e-06
1.335e-08
d
yr
n .2884938632418663 1.1275e-09 deg/d
Q 2.65000437917698 6.9043e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2367  
   data-arc span      10558 days (28.91 yr)  
   first obs. used      1992-04-23  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:56:40  

Additional Information
 Earth MOID = .870478 au 
 Jupiter MOID = 2.53865 au 
 T_jup = 3.594 
[ 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 14.53   n/a E2021B10  
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

Alternate Designations
 1999 JZ50 = 1992 HU = 1997 YX20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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