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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1343172892908902 6.0017e-08  
a 2.688361691770162 2.1068e-08 au
q 2.327268236698123 1.6157e-07 au
i 3.053580901426246 6.1528e-06 deg
node 215.3875706164577 9.8022e-05 deg
peri 154.83394232975 9.97e-05 deg
M 217.0672622472511 2.1644e-05 deg
tp 2458239.732998091106
(2018-May-01.23299809)
9.9897e-05 JED
period 1610.015192676686
4.41
1.8926e-05
5.182e-08
d
yr
n .2236003744793812 2.6285e-09 deg/d
Q 3.049455146842202 2.3898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      8982 days (24.59 yr)  
   first obs. used      1991-09-13  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5051  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:29:46  

Additional Information
 Earth MOID = 1.32618 au 
 Jupiter MOID = 2.41345 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 14.4 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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