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218400 Marquardt (2004 QG7)
Classification: Main-belt Asteroid          SPK-ID: 2218400
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1363360961692944 7.5591e-08  
a 3.071589658744717 2.6572e-08 au
q 2.652821115637487 2.3009e-07 au
i 11.77255711591274 8.0894e-06 deg
node 347.0286638660193 1.8446e-05 deg
peri 355.369221301996 2.8431e-05 deg
M 27.52934156987396 1.7486e-05 deg
tp 2459050.138536006018
(2020-Jul-19.63853601)
9.6236e-05 TDB
period 1966.270312003009
5.38
2.5515e-05
6.986e-08
d
yr
n .183087746279032 2.3758e-09 deg/d
Q 3.490358201851947 3.0195e-08 au
  Orbit Determination Parameters
   # obs. used (total)      333  
   data-arc span      5980 days (16.37 yr)  
   first obs. used      2004-08-22  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56527  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:02:52  

Additional Information
 Earth MOID = 1.6434 au 
 Jupiter MOID = 1.92037 au 
 T_jup = 3.184 
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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 15.85   n/a E2021B55  

218400 Marquardt           Discovered 2004 Aug. 22 by W. Ries at Altschwendt.
Daniel Marquardt (b. 1983), known for his high-quality astrophotographs, is a writer nd educator. He is known particularly for his pioneering work in remote astrophotography, and he was one of the initiators of ROSA (Remote Observatories Southern Alps), a remote observatory park in the south of France.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

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