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JPL Small-Body Database Browser
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19591 Michaelklein (1999 NW21)
Classification: Main-belt Asteroid          SPK-ID: 2019591
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09611641755267189 5.1317e-08  
a 2.753766263638247 1.483e-08 au
q 2.489084115599932 1.3878e-07 au
i 6.296500287006997 3.8151e-06 deg
node 92.18298907404608 4.7666e-05 deg
peri 254.945087746519 5.1836e-05 deg
M 160.6828681895944 2.1262e-05 deg
tp 2458255.500272271970
(2018-May-17.00027227)
9.8339e-05 TDB
period 1669.125682183081
4.57
1.3483e-05
3.691e-08
d
yr
n .2156817810922119 1.7422e-09 deg/d
Q 3.018448411676562 1.6255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1187  
   data-arc span      9373 days (25.66 yr)  
   first obs. used      1994-06-08  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:51:32  

Additional Information
 Earth MOID = 1.49105 au 
 Jupiter MOID = 2.34545 au 
 T_jup = 3.329 
[ 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 14.4   n/a MPO350958  
diameter diameter 6.745 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19591 Michaelklein           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Michael Aaron Klein (b. 1989) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his behavioral science project. He attends the Lawrence Middle School, Lawrence, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031010/MPCPages.arcLast Updated: 2003-10-10

[ show close-approach data ]
Alternate Designations
 1999 NW21 = 1994 LE1 = 1996 XN14 = 1998 HB35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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