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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550586952135229 6.8647e-08  
a 2.682662674070841 2.1643e-08 AU
q 2.266692500131396 1.8135e-07 AU
i 4.093042567610756 6.1866e-06 deg
node 72.08795432198774 9.1262e-05 deg
peri 259.2530695662783 9.3554e-05 deg
M 124.2097716002406 2.157e-05 deg
tp 2456446.766511716155
(2013-Jun-03.26651172)
9.4942e-05 JED
period 1604.898336209469
4.39
1.9422e-05
5.317e-08
d
yr
n .2243132738552564 2.7146e-09 deg/d
Q 3.098632848010286 2.4999e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      8580 days (23.49 yr)  
   first obs. used      1991-09-15  
   last obs. used      2015-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55119  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:00:44  

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
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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