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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1360637379469387 6.3693e-08  
a 2.633030307039865 2.7357e-08 AU
q 2.274770361336445 1.7455e-07 AU
i 4.065363312793536 6.7048e-06 deg
node 62.87254999121455 9.8117e-05 deg
peri 290.9068507304065 0.00010135 deg
M 159.7613865995252 2.6946e-05 deg
tp 2456307.949361007137
(2013-Jan-15.44936101)
0.00011453 JED
period 1560.566262875511
4.27
2.4321e-05
6.659e-08
d
yr
n .2306854944670285 3.5952e-09 deg/d
Q 2.991290252743285 3.1079e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      781  
   data-arc span      8222 days (22.51 yr)  
   first obs. used      1991-09-14  
   last obs. used      2014-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51621  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:05:56  

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 14.0 mag n/a MPO244350  

18372 (1991 RF16)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675)
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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