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21634 Huangweikang (1999 NB18)
Classification: Main-belt Asteroid          SPK-ID: 2021634
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1883383825488781 3.1866e-08  
a 2.302040577075847 6.3581e-09 au
q 1.868477978227496 7.4483e-08 au
i 6.757049463926728 3.4319e-06 deg
node 69.43635839113824 2.8276e-05 deg
peri 328.1247416449721 2.9607e-05 deg
M 18.85256103840217 8.7094e-06 deg
tp 2459329.690881220768
(2021-Apr-25.19088122)
3.0768e-05 TDB
period 1275.756790365601
3.49
5.2854e-06
1.447e-08
d
yr
n .2821854468803829 1.1691e-09 deg/d
Q 2.735603175924197 7.5556e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1825  
   data-arc span      23691 days (64.86 yr)  
   first obs. used      1956-03-10  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48412  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:50:55  

Additional Information
 Earth MOID = .879714 au 
 Jupiter MOID = 2.68356 au 
 T_jup = 3.558 
[ 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 14.61   n/a E2021B10  
diameter diameter 3.281 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21634 Huangweikang           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Huang Wei-Kang (b. 1986) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for his engineering team project. He also received the EU Contest for Young Scientists Award. He attends the Taipei Municipal Lishan Senior High School, Taipei, Chinese Taipei.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

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Alternate Designations
 1999 NB18 = 1975 UE1 = 1998 HZ133 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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