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137217 Racah (1999 NH64)
Classification: Main-belt Asteroid          SPK-ID: 2137217
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1265358295143586 1.4496e-07  
a 2.284804668551953 1.7294e-08 AU
q 1.995695014538452 3.243e-07 AU
i 6.280428458299617 1.3083e-05 deg
node 211.2438751280118 5.3934e-05 deg
peri 159.9814377855205 6.7336e-05 deg
M 133.8308503580893 3.7943e-05 deg
tp 2456531.550821062573
(2013-Aug-27.05082106)
0.0001303 JED
period 1261.455815051312
3.45
1.4322e-05
3.921e-08
d
yr
n .2853845499022543 3.2402e-09 deg/d
Q 2.573914322565453 1.9483e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      258  
   data-arc span      5292 days (14.49 yr)  
   first obs. used      1999-07-08  
   last obs. used      2014-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61537  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 05:43:27  

Additional Information
 Earth MOID = .99729 AU 
 T_jup = 3.584 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2 mag n/a MPO273222  

137217 Racah           Discovered 1999 July 8 by I. Manulis and A. Gal-Yam at the Wise Observatory.
Italian-born Giulio (Yoel) Racah (1909-1965) was a founder of physics in Israel. He worked with Enrico Fermi and Wolfgang Pauli. In the early 1940s, while working in the Hebrew University of Jerusalem, Racah established the basis for using the principals of symmetry to study the atomic nucleus and atomic spectroscopy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

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Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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