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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .143193768962067 1.0487e-08  
a 2.322473199120111 7.1603e-09 au
q 1.989909508424713 2.5936e-08 au
i 6.587620066543204 1.9268e-07 deg
node 81.33610369002345 6.6823e-06 deg
peri 170.3198389725163 1.0087e-05 deg
M 6.807479840735231 1.2474e-05 deg
tp 2459176.053969089932
4.4745e-05 TDB
period 1292.779609123868
n .2784697387391314 1.2878e-09 deg/d
Q 2.655036889815509 8.1857e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2397  
   data-arc span      25121 days (68.78 yr)  
   first obs. used      1951-11-08  
   last obs. used      2020-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45706  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:22:11  

Additional Information
 Earth MOID = .974179 au 
 Jupiter MOID = 2.37891 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 13.37   n/a E2021B10  
diameter diameter 4.091 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.1704 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2020)]
geometric albedo albedo 0.554   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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 38 CATAB v2.0f-lin.ifort 2021-Apr-12 20:23:17 2021-Apr-12 20:23

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