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18376 Quirk (1991 SQ)
Classification: Main-belt Asteroid          SPK-ID: 2018376
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2333936563115086 4.3873e-08  
a 2.725383538841641 1.392e-08 au
q 2.089296309860192 1.2022e-07 au
i 10.50078265623866 4.2208e-06 deg
node 38.63198483464428 2.6225e-05 deg
peri 323.9471293831912 2.729e-05 deg
M 125.7051600807746 9.1353e-06 deg
tp 2458426.660453963107
(2018-Nov-04.16045396)
4.0848e-05 TDB
period 1643.387084830388
4.50
1.2591e-05
3.447e-08
d
yr
n .2190597719326455 1.6783e-09 deg/d
Q 3.36147076782309 1.7169e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1425  
   data-arc span      11839 days (32.41 yr)  
   first obs. used      1988-01-11  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42527  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:21  

Additional Information
 Earth MOID = 1.09808 au 
 Jupiter MOID = 2.12644 au 
 T_jup = 3.293 
[ 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 14.6   n/a MPO378747  

18376 Quirk           Discovered 1991 Sept. 30 by R. H. McNaught at Siding Spring Observatory.
Steven (Steve) Quirk (b. 1958) is an accomplished astrophotographer whose photographs have appeared in many books and magazines. He has been of immense assistance to the discoverer by volunteering to operate fireball patrol and meteor video cameras.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040504/MPCPages.arcLast Updated: 2004-05-11

[ show close-approach data ]
Alternate Designations
 1991 SQ = 1988 AK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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