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19574 Davidedwards (1999 LQ21)
Classification: Main-belt Asteroid          SPK-ID: 2019574
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1892650143816836 2.7029e-08  
a 2.249775969922185 5.667e-09 au
q 1.823972088619296 6.0109e-08 au
i 3.305777683123928 3.4583e-06 deg
node 91.35222424411114 5.3561e-05 deg
peri 247.4461517923354 5.4572e-05 deg
M 74.70848422477847 1.2193e-05 deg
tp 2458944.715183084137
(2020-Apr-05.21518308)
4.1278e-05 TDB
period 1232.557922238899
3.37
4.6571e-06
1.275e-08
d
yr
n .2920755231900764 1.1036e-09 deg/d
Q 2.675579851225074 6.7395e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2025  
   data-arc span      14176 days (38.81 yr)  
   first obs. used      1982-05-15  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49745  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:58:35  

Additional Information
 Earth MOID = .81618 au 
 Jupiter MOID = 2.70856 au 
 T_jup = 3.602 
[ 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 14.84   n/a E2021B10  
rotation period rot_per 37.635 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

19574 Davidedwards           Discovered 1999 June 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
David Kitzmiller Edwards V (b. 1988) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his environmental sciences project. He attends the Emily Gray Junior High School, Tucson, Arizona.
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 LQ21 = 1982 JG3 = 1992 HK3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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