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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1431040223478963 3.2101e-08  
a 2.322324283881234 7.4648e-09 au
q 1.989990337661631 7.6055e-08 au
i 6.587746551697372 3.4413e-06 deg
node 81.33626013028424 3.6166e-05 deg
peri 170.2902824000182 3.9846e-05 deg
M 311.1301715659234 1.88e-05 deg
tp 2459175.977337270398
(2020-Nov-22.47733727)
6.7822e-05 TDB
period 1292.655273029241
3.54
6.2326e-06
1.706e-08
d
yr
n .2784965237919672 1.3428e-09 deg/d
Q 2.654658230100836 8.533e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2351  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:56:53  

Additional Information
 Earth MOID = .975868 au 
 Jupiter MOID = 2.38028 au 
 T_jup = 3.554 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456834.5 (2014-Jun-26.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435557070805396 3.2012e-08  
q 1.989198597108661 7.5888e-08 au
tp 2456590.300265846965
(2013-Oct-24.80026585)
6.4022e-05 TDB
node 81.38053512972478 3.6169e-05 deg
peri 170.2804478808099 3.984e-05 deg
i 6.587571104210983 3.4409e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2351  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:56:53  

Additional Information
 Jupiter MOID = 2.38028 au 
 T_jup = 3.554 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.024740166212468E-15 -2.421021686258808E-15 -4.974664388753137E-13 3.909208770968055E-15 -1.284338696370605E-13 5.164882188818528E-16
q -2.421021686258808E-15 5.758967260924593E-15 1.23956491708733E-12 -9.198133878383631E-15 3.208252623664514E-13 -1.08374417472043E-15
tp -4.974664388753137E-13 1.23956491708733E-12 4.09880420042533E-9 -1.914350420608178E-11 1.090095757926612E-9 8.127784202513556E-13
node 3.909208770968055E-15 -9.198133878383631E-15 -1.914350420608178E-11 1.308187442727667E-9 -1.304008676161489E-9 -1.209584811419854E-11
peri -1.284338696370605E-13 3.208252623664514E-13 1.090095757926612E-9 -1.304008676161489E-9 1.587222478612304E-9 1.223500415720789E-11
i 5.164882188818528E-16 -1.08374417472043E-15 8.127784202513556E-13 -1.209584811419854E-11 1.223500415720789E-11 1.183956595475384E-11

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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