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18374 (1991 RA18)
Classification: Main-belt Asteroid          SPK-ID: 2018374
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1325476343526286 7.3088e-08  
a 2.688290238383725 2.4299e-08 AU
q 2.331963726832698 1.9979e-07 AU
i 3.046901654810765 7.6704e-06 deg
node 215.6185981690148 0.00011018 deg
peri 153.8807844804702 0.00011229 deg
M 39.19616712711041 2.2265e-05 deg
tp 2456625.211364866783
(2013-Nov-28.71136487)
9.9209e-05 JED
period 1609.951004732593
4.41
2.1828e-05
5.976e-08
d
yr
n .2236092893148601 3.0317e-09 deg/d
Q 3.044616749934752 2.7519e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1991-09-13  
   last obs. used      2014-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57035  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:28:06  

Additional Information
 Earth MOID = 1.3305 AU 
 T_jup = 3.358 
[ 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 14.3 mag n/a MPO267776  

18374 (1991 RA18)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar (675)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RA18 = 1998 FJ140 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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