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8149 Ruff (1985 JN1)
Classification: Main-belt Asteroid          SPK-ID: 2008149
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430850523018824 4.0407e-08  
a 2.322888065071138 9.6669e-09 au
q 1.990517504789016 9.2056e-08 au
i 6.587926896512057 4.1741e-06 deg
node 81.33844373174836 3.7795e-05 deg
peri 170.1744859364958 4.1648e-05 deg
M 199.8770030142661 2.1103e-05 deg
tp 2459175.664483036594
(2020-Nov-22.16448304)
7.7766e-05 TDB
period 1293.126020565438
3.54
8.0722e-06
2.21e-08
d
yr
n .2783951403611728 1.7379e-09 deg/d
Q 2.655258625353261 1.105e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1766  
   data-arc span      24615 days (67.39 yr)  
   first obs. used      1951-11-08  
   last obs. used      2019-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50019  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:54:07  

Additional Information
 Earth MOID = .976162 au 
 Jupiter MOID = 2.37946 au 
 T_jup = 3.554 
[ 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 13.4   n/a MPO358710  
diameter diameter 4.091 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.554   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8149 Ruff           Discovered 1985 May 11 by C. Shoemaker and E. Shoemaker at Palomar.
Jan Ruff (b. 1949) is the very capable, warm-spirited and enthusiastic chief of the Office of Public Affairs for Goddard Space Center, NASA. Steve Ruff (b. 1949) is an imaginative, creative and knowledgeable middle-school teacher with a wonderful dry sense of humor.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1985 JN1 = 1992 HC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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