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JPL Small-Body Database Browser
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6400 Georgealexander (1991 GQ1)
Classification: Main-belt Asteroid          SPK-ID: 2006400
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1542049698483763 3.743e-08  
a 3.017110069742168 1.8209e-08 au
q 2.551856702408344 1.1121e-07 au
i 12.71578845276689 4.2144e-06 deg
node 87.53231013889105 1.8659e-05 deg
peri 232.8591450889198 2.311e-05 deg
M 126.5393565252036 1.4683e-05 deg
tp 2458327.665457884640
(2018-Jul-28.16545788)
7.7632e-05 TDB
period 1914.190508099235
5.24
1.7329e-05
4.744e-08
d
yr
n .1880690550270647 1.7025e-09 deg/d
Q 3.482363437075991 2.1017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2481  
   data-arc span      11018 days (30.17 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40691  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:33:32  

Additional Information
 Earth MOID = 1.56129 au 
 Jupiter MOID = 1.85193 au 
 T_jup = 3.192 
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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 12.0   n/a MPO452258  
diameter diameter 12.100 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.399   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6400 Georgealexander           Discovered 1991 Apr. 10 by E. F. Helin at Palomar Observatory.
Named in honor of George Alexander, soon to retire from the Jet propulsion Laboratory as public-affairs manager. He has spent almost 40 years communicating science and space exploration to the public. After seven years as a reporter for Aviation Week magazine, he went to Newsweek in 1967, writing all the cover stories about the Apollo moon program. Alexander left Newsweek to become science writer for The Los Angeles Times, and he won several major awards for excellence in science writing. He became very well acquainted with JPL through his coverage of the Viking, Voyager and other missions, and he joined the staff in 1988. He was president of both the National Association of Science Writers and the Council for the Advancement of Science Writing in the 1970s and 1980s.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1991 GQ1 = 1992 QL1 
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