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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550867277022175 5.9682e-08  
a 2.682107428983404 2.0142e-08 au
q 2.26614816447656 1.6088e-07 au
i 4.091177847791343 5.419e-06 deg
node 71.89015979353955 8.8287e-05 deg
peri 260.3033713380789 9.0389e-05 deg
M 257.6775366387916 2.1724e-05 deg
tp 2458056.517140239137
(2017-Oct-30.01714024)
9.8549e-05 JED
period 1604.400100362776
4.39
1.8073e-05
4.948e-08
d
yr
n .2243829328598267 2.5276e-09 deg/d
Q 3.098066693490248 2.3265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      876  
   data-arc span      8978 days (24.58 yr)  
   first obs. used      1991-09-15  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54488  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:29:46  

Additional Information
 Earth MOID = 1.25937 au 
 Jupiter MOID = 2.25067 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 14.7 mag n/a MPO337413  

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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