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8643 Quercus (1988 SC)
Classification: Main-belt Asteroid          SPK-ID: 2008643
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1538568147051995 1.323e-08  
a 2.571320565756941 1.2208e-08 au
q 2.175705373923607 3.6709e-08 au
i 12.98382926279418 5.161e-07 deg
node .2229888301429813 1.5935e-06 deg
peri 70.68271046850991 6.6229e-06 deg
M 236.3569351319322 9.4303e-06 deg
tp 2459717.749432678520
(2022-May-18.24943268)
4.1667e-05 TDB
period 1506.027013831796
4.12
1.0726e-05
2.937e-08
d
yr
n .2390395369363589 1.7024e-09 deg/d
Q 2.966935757590275 1.4087e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1719  
   data-arc span      25174 days (68.92 yr)  
   first obs. used      1951-10-04  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43328  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:46:31  

Additional Information
 Earth MOID = 1.22683 au 
 Jupiter MOID = 2.42539 au 
 T_jup = 3.377 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.16   n/a E2021B10  
diameter diameter 5.801 km 0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.953 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.]
geometric albedo albedo 0.331   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

8643 Quercus           Discovered 1988 Sept. 16 by E. W. Elst at Haute Provence.
Named for Quercus, a genus belonging to the family Fagaceae. The tree Quercus robur (English oak) reaches a height of 30-40 m and an age of more than a thousand years.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1988 SC = 1951 TH = 1982 FE4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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