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55754 (1991 RP18)
Classification: Main-belt Asteroid          SPK-ID: 2055754
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962515020758863 5.467e-08  
a 2.240705118983108 1.4024e-08 AU
q 1.800963373673546 1.2709e-07 AU
i 1.234590212427776 6.2847e-06 deg
node 317.7757156078305 0.00024354 deg
peri 39.63299819976999 0.00024385 deg
M 330.4247758401102 1.8389e-05 deg
tp 2457101.147045472711
(2015-Mar-19.64704547)
6.3153e-05 JED
period 1225.111132693142
3.35
1.1501e-05
3.149e-08
d
yr
n .2938508927011525 2.7586e-09 deg/d
Q 2.680446864292671 1.6776e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      470  
   data-arc span      8379 days (22.94 yr)  
   first obs. used      1991-09-13  
   last obs. used      2014-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62363  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:57:49  

Additional Information
 Earth MOID = .797264 AU 
 T_jup = 3.609 
[ 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 16.1 mag n/a MPO259697  

55754 (1991 RP18)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar (675)
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RP18 = 1997 HX13 = 2000 GE12 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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