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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1552740284641661 7.2114e-08  
a 2.681077251376722 2.333e-08 AU
q 2.264775585931825 1.9321e-07 AU
i 4.094620252993106 6.9402e-06 deg
node 72.09691284767521 0.00010646 deg
peri 259.0293991095743 0.00010933 deg
M 79.54540312012986 2.4193e-05 deg
tp 2456446.196857121950
(2013-Jun-02.69685712)
0.00010792 JED
period 1603.475831827426
4.39
2.0929e-05
5.73e-08
d
yr
n .2245122706899301 2.9305e-09 deg/d
Q 3.097378916821619 2.6953e-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 = 1.25726 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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