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21387 Wafakhalil (1998 FW16)
Classification: Main-belt Asteroid          SPK-ID: 2021387
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217316843874975 3.6044e-08  
a 2.36849699593193 7.244e-09 au
q 2.080175867150408 8.5493e-08 au
i 3.481859012766085 3.8377e-06 deg
node 331.6722605872181 4.7899e-05 deg
peri 4.640929584640014 4.9432e-05 deg
M 330.2768792437833 1.3205e-05 deg
tp 2459506.425788459132
(2021-Oct-18.92578846)
4.9044e-05 TDB
period 1331.397337778218
3.65
6.1081e-06
1.672e-08
d
yr
n .2703926091671127 1.2405e-09 deg/d
Q 2.656818124713451 8.1258e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1711  
   data-arc span      10026 days (27.45 yr)  
   first obs. used      1994-01-07  
   last obs. used      2021-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51371  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:07:13  

Additional Information
 Earth MOID = 1.06974 au 
 Jupiter MOID = 2.67693 au 
 T_jup = 3.534 
[ 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 14.8   n/a MPO319352  
diameter diameter 2.524 km 0.439 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.401   0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21387 Wafakhalil           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Wafa Khalil (b. 1945), a 2004 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the MAST Academy High School, Miami, Florida, 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: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 1998 FW16 = 2000 WN117 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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