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21448 Galindo (1998 HE21)
Classification: Main-belt Asteroid          SPK-ID: 2021448
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .124661446361125 2.9627e-08  
a 2.296499412661612 6.5271e-09 au
q 2.010214474311741 6.7603e-08 au
i 4.103635971776931 4.0569e-06 deg
node 179.4437436946489 4.2255e-05 deg
peri 76.01776175109342 4.5157e-05 deg
M 136.7931348189151 1.6274e-05 deg
tp 2458717.485980557425
(2019-Aug-21.98598056)
5.7031e-05 TDB
period 1271.153316498767
3.48
5.4193e-06
1.484e-08
d
yr
n .2832073797294373 1.2074e-09 deg/d
Q 2.582784351011483 7.3408e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1364  
   data-arc span      16012 days (43.84 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5139  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:45:43  

Additional Information
 Earth MOID = .998727 au 
 Jupiter MOID = 2.45494 au 
 T_jup = 3.581 
[ 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 15.65   n/a E2020-QM5  

21448 Galindo           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Armando Galindo mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Robert Louis Stevenson School, Pebble Beach, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

[ show close-approach data ]
Alternate Designations
 1998 HE21 = 1977 EC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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