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6789 Milkey (1991 RM6)
Classification: Main-belt Asteroid          SPK-ID: 2006789
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410115748368575 5.9762e-08  
a 2.337639988533815 1.5165e-08 AU
q 2.008005692349048 1.3694e-07 AU
i 6.167505952175038 7.045e-06 deg
node 138.0901428554837 4.8914e-05 deg
peri 283.7334327026142 5.5806e-05 deg
M 123.1640823456875 2.591e-05 deg
tp 2456553.871488962568
(2013-Sep-18.37148896)
9.292e-05 JED
period 1305.463905639251
3.57
1.2703e-05
3.478e-08
d
yr
n .2757640394689561 2.6835e-09 deg/d
Q 2.667274284718581 1.7304e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      998  
   data-arc span      11804 days (32.32 yr)  
   first obs. used      1982-01-30  
   last obs. used      2014-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52125  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:35:27  

Additional Information
 Earth MOID = 1.03124 AU 
 T_jup = 3.545 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO234881  

6789 Milkey           Discovered 1991 Sept. 4 by E. F. Helin at Palomar.
Robert Milkey (b. 1944) served as executive officer of the American Astronomical Society during 1995-2006. During his tenure he expanded and enhanced the society's journals---especially their electronic versions, improved its financial health and increased the range of its activities in education and public policy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1991 RM6 = 1982 BC13 = 1989 AT9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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