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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1431040211317483 3.5695e-08  
a 2.322324284120222 8.5479e-09 au
q 1.989990340690709 8.2819e-08 au
i 6.587744992462691 3.9055e-06 deg
node 81.33626129071811 3.6616e-05 deg
peri 170.290282665878 4.0488e-05 deg
M 311.130170003377 2.039e-05 deg
tp 2459175.977342908135
(2020-Nov-22.47734291)
7.3688e-05 TDB
period 1292.65527322878
3.54
7.1369e-06
1.954e-08
d
yr
n .2784965237489775 1.5376e-09 deg/d
Q 2.654658227549734 9.7711e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1978  
   data-arc span      24925 days (68.24 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:47:24  

Additional Information
 Earth MOID = .975868 au 
 Jupiter MOID = 2.38028 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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