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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196289623173017 5.5029e-08  
a 2.240587765123687 1.4013e-08 AU
q 1.800783637021486 1.278e-07 AU
i 1.234607912039842 6.3284e-06 deg
node 317.7767733883254 0.00024477 deg
peri 39.65492621311896 0.00024508 deg
M 271.6360805726194 1.8066e-05 deg
tp 2457101.186435890415
(2015-Mar-19.68643589)
6.3159e-05 JED
period 1225.014888678737
3.35
1.1492e-05
3.146e-08
d
yr
n .2938739792691702 2.757e-09 deg/d
Q 2.680391893225888 1.6764e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      467  
   data-arc span      8327 days (22.80 yr)  
   first obs. used      1991-09-13  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62479  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 13:43:51  

Additional Information
 Earth MOID = .795526 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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