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6688 Donmccarthy (1981 ER17)
Classification: Main-belt Asteroid          SPK-ID: 2006688
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725126117909977 3.5901e-08  
a 3.103318462643125 1.6254e-08 au
q 2.567956889433336 1.0972e-07 au
i 4.82819061501585 4.0655e-06 deg
node 207.6031834857403 3.8596e-05 deg
peri 189.5516761982102 3.9834e-05 deg
M 177.2806762526536 1.1635e-05 deg
tp 2458017.175537054407
(2017-Sep-20.67553705)
6.0404e-05 TDB
period 1996.815525206543
5.47
1.5688e-05
4.295e-08
d
yr
n .1802870597987578 1.4164e-09 deg/d
Q 3.638680035852914 1.9058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2009  
   data-arc span      15270 days (41.81 yr)  
   first obs. used      1978-09-01  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49378  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:33:52  

Additional Information
 Earth MOID = 1.57534 au 
 Jupiter MOID = 1.78681 au 
 T_jup = 3.193 
[ 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 13.1   n/a MPO435762  
diameter diameter 8.910 km 0.428 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.169   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6688 Donmccarthy           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Since the 1970s, Donald W. McCarthy (b. 1948) has been an instrumental part of astronomy education and research at the University of Arizona. He specializes in infrared astronomy and instrumentation and has been an inspiration to his students and to the hundreds who have participated in his Astronomy Camps.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

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