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18372 (1991 RF16)
Classification: Main-belt Asteroid          SPK-ID: 2018372
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1360637412108426 6.362e-08  
a 2.633030294869081 2.5044e-08 AU
q 2.274770342227706 1.7372e-07 AU
i 4.065356705100206 5.9103e-06 deg
node 62.87252126816118 9.6432e-05 deg
peri 290.9068914376331 9.905e-05 deg
M 159.7613793694815 2.6123e-05 deg
tp 2456307.949397150514
(2013-Jan-15.44939715)
0.00010968 JED
period 1560.566252055289
4.27
2.2265e-05
6.096e-08
d
yr
n .2306854960664917 3.2913e-09 deg/d
Q 2.991290247510456 2.8452e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      8596 days (23.53 yr)  
   first obs. used      1991-09-14  
   last obs. used      2015-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:00:44  

Additional Information
 Earth MOID = 1.27399 AU 
 T_jup = 3.382 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO324478  

18372 (1991 RF16)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RF16 = 1997 AD21 = 1998 DF37 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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