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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1958454153979268 4.5067e-08  
a 2.241144540961893 1.2075e-08 au
q 1.802226657370415 1.0251e-07 au
i 1.233821794888621 6.04e-06 deg
node 317.7724339068376 0.00022724 deg
peri 39.71510817132845 0.00022762 deg
M 146.6743353544837 1.8677e-05 deg
tp 2457101.207715019576
(2015-Mar-19.70771502)
6.1152e-05 JED
period 1225.471532961394
3.36
9.9037e-06
2.711e-08
d
yr
n .2937644737695764 2.3741e-09 deg/d
Q 2.680062424553371 1.4439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      562  
   data-arc span      8909 days (24.39 yr)  
   first obs. used      1991-09-13  
   last obs. used      2016-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60187  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 23:36:18  

Additional Information
 Earth MOID = .797316 au 
 Jupiter MOID = 2.75693 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
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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