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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547555165121783 6.8567e-08  
a 2.683929881028054 2.2593e-08 au
q 2.268576926007088 1.809e-07 au
i 4.089712120087357 6.1516e-06 deg
node 71.92734147448134 9.1209e-05 deg
peri 260.0132771935787 9.3478e-05 deg
M 213.1057450439346 2.1795e-05 deg
tp 2458055.826130196601
(2017-Oct-29.32613020)
9.9496e-05 JED
period 1606.035627066128
4.40
2.0279e-05
5.552e-08
d
yr
n .2241544296608416 2.8304e-09 deg/d
Q 3.09928283604902 2.609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      787  
   data-arc span      8628 days (23.62 yr)  
   first obs. used      1991-09-15  
   last obs. used      2015-04-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54826  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:31:31  

Additional Information
 Earth MOID = 1.26044 au 
 Jupiter MOID = 2.24714 au 
 T_jup = 3.354 
[ 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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