Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .189727603973158 3.4421e-08  
a 2.249744709688116 7.5053e-09 au
q 1.822906036367702 7.931e-08 au
i 3.305895515275546 3.605e-06 deg
node 91.35329211062957 6.4807e-05 deg
peri 247.4749408835996 6.5657e-05 deg
M 259.4631121521308 1.3532e-05 deg
tp 2458944.708208014244
(2020-Apr-05.20820801)
4.7403e-05 TDB
period 1232.532233070849
3.37
6.1677e-06
1.689e-08
d
yr
n .2920816108014161 1.4616e-09 deg/d
Q 2.676583383008531 8.9293e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1593  
   data-arc span      13609 days (37.26 yr)  
   first obs. used      1982-05-15  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5339  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:28:10  

Additional Information
 Earth MOID = .816084 au 
 Jupiter MOID = 2.70451 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 14.9   n/a MPO474023  
rotation period rot_per 37.635 h n/a LCDB (Rev. 2019-January); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 23:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin