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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326996751681855 6.1621e-08  
a 2.689625029449569 2.2269e-08 AU
q 2.33271266171739 1.6472e-07 AU
i 3.046120079223357 6.3194e-06 deg
node 215.5967843495846 0.00010672 deg
peri 154.0977662011219 0.0001086 deg
M 83.70635929863559 2.2093e-05 deg
tp 2456625.879114743121
(2013-Nov-29.37911474)
9.8029e-05 JED
period 1611.150213944076
4.41
2.001e-05
5.478e-08
d
yr
n .2234428527422805 2.7751e-09 deg/d
Q 3.046537397181749 2.5224e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      894  
   data-arc span      8594 days (23.53 yr)  
   first obs. used      1991-09-13  
   last obs. used      2015-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51374  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:00:44  

Additional Information
 Earth MOID = 1.3327 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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