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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .143104022418438 3.2101e-08  
a 2.32232428393226 7.461e-09 au
q 1.989990337541535 7.6054e-08 au
i 6.587746529668156 3.4407e-06 deg
node 81.33625987412361 3.6159e-05 deg
peri 170.290282757599 3.9836e-05 deg
M 311.1301714256963 1.8783e-05 deg
tp 2459175.977337779697
(2020-Nov-22.47733778)
6.7761e-05 TDB
period 1292.655273071845
3.54
6.2294e-06
1.706e-08
d
yr
n .2784965237827886 1.3421e-09 deg/d
Q 2.654658230322985 8.5287e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2358  
   data-arc span      25121 days (68.78 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45405  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:22:58  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1906-Jul-11 20:19 < 00:01 Amphi 0.0337657043930249 0.0337553496869034 0.0337760592647589 4.89408806581977 4.8940880310321 2417403.346300199 0.397887751904223 529.580595009427 41.5184038006281 12.9513135667631 28796.3572103041 T 36 CATAB v2.0f-lin.ifort 2020-Nov-13 03:23:04 2020-Nov-13 03:23

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