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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .133666519390786 6.175e-08  
a 2.68999072477004 2.3054e-08 au
q 2.330429027396531 1.654e-07 au
i 3.050897315243599 6.3054e-06 deg
node 215.4033201906247 0.00010643 deg
peri 154.7160429384046 0.00010827 deg
M 172.4822834266591 2.2078e-05 deg
tp 2456628.412372764745
(2013-Dec-01.91237276)
9.695e-05 JED
period 1611.47881557864
4.41
2.0716e-05
5.672e-08
d
yr
n .2233972898183793 2.8718e-09 deg/d
Q 3.049552422143549 2.6135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      904  
   data-arc span      8610 days (23.57 yr)  
   first obs. used      1991-09-13  
   last obs. used      2015-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51204  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:31:31  

Additional Information
 Earth MOID = 1.32872 au 
 Jupiter MOID = 2.41376 au 
 T_jup = 3.357 
[ 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 14.4 mag n/a MPO313567  

18374 (1991 RA18)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
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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