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21721 Feiniqu (1999 RY119)
Classification: Main-belt Asteroid          SPK-ID: 2021721
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132989239993236 3.3175e-08  
a 2.316302894412787 7.4875e-09 au
q 2.008259532890698 7.6199e-08 au
i 7.101122652489187 3.8785e-06 deg
node 152.023785286741 3.0695e-05 deg
peri 174.0469073030696 3.4029e-05 deg
M 16.29193376702758 1.5334e-05 deg
tp 2459142.227776915000
(2020-Oct-19.72777691)
5.475e-05 TDB
period 1287.631082386087
3.53
6.2435e-06
1.709e-08
d
yr
n .2795831856845907 1.3556e-09 deg/d
Q 2.624346255934876 8.4833e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1358  
   data-arc span      9836 days (26.93 yr)  
   first obs. used      1994-02-13  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:52:11  

Additional Information
 Earth MOID = .994796 au 
 Jupiter MOID = 2.69119 au 
 T_jup = 3.559 
[ 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 15.22   n/a E2021B10  
diameter diameter 1.900 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.489   0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21721 Feiniqu           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Feini Qu (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for her engineering team project. She also received the Intel Foundation Achievement Award. She attends the Half Hollow Hills High School East, Dix Hills, New York, 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: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1999 RY119 = 1998 FS129 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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