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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550586960024256 7.1258e-08  
a 2.682662673777925 2.2856e-08 AU
q 2.266692497767539 1.9024e-07 AU
i 4.093043856216868 6.864e-06 deg
node 72.08793153942896 0.00010374 deg
peri 259.2530927675801 0.00010651 deg
M 124.209771228554 2.376e-05 deg
tp 2456446.766513463845
(2013-Jun-03.26651346)
0.0001058 JED
period 1604.898335946614
4.39
2.0511e-05
5.616e-08
d
yr
n .2243132738919952 2.8667e-09 deg/d
Q 3.09863284978831 2.64e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      674  
   data-arc span      8420 days (23.05 yr)  
   first obs. used      1991-09-15  
   last obs. used      2014-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57615  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:37:27  

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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