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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550587095841468 7.2175e-08  
a 2.682662669666647 2.3121e-08 AU
q 2.266692457858575 1.9321e-07 AU
i 4.093044548166159 6.9366e-06 deg
node 72.08791516261402 0.00010652 deg
peri 259.253116488206 0.00010938 deg
M 124.2097656517352 2.4227e-05 deg
tp 2456446.766539598512
(2013-Jun-03.26653960)
0.0001081 JED
period 1604.898332257267
4.39
2.0748e-05
5.68e-08
d
yr
n .2243132744076474 2.9e-09 deg/d
Q 3.09863288147472 2.6706e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      663  
   data-arc span      8192 days (22.43 yr)  
   first obs. used      1991-09-15  
   last obs. used      2014-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57849  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:05:56  

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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