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18373 (1991 RQ16)
Classification: Main-belt Asteroid          SPK-ID: 2018373
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550586924055155 7.0793e-08  
a 2.682662675010852 2.269e-08 AU
q 2.266692508458587 1.887e-07 AU
i 4.093043286342908 6.802e-06 deg
node 72.08794365651092 0.00010183 deg
peri 259.253078477656 0.00010454 deg
M 124.2097728975708 2.3456e-05 deg
tp 2456446.766505641546
(2013-Jun-03.26650564)
0.00010431 JED
period 1604.898337053009
4.39
2.0361e-05
5.575e-08
d
yr
n .2243132737373566 2.8458e-09 deg/d
Q 3.098632841563117 2.6208e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      677  
   data-arc span      8444 days (23.12 yr)  
   first obs. used      1991-09-15  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57529  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:31:38  

Additional Information
 Earth MOID = 1.26103 AU 
 T_jup = 3.355 
[ 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 14.6 mag n/a MPO272727  

18373 (1991 RQ16)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RQ16 = 1996 XN13 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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