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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1368863845783795 6.369e-08  
a 2.631176164694403 2.4436e-08 au
q 2.271003972320579 1.7373e-07 au
i 4.06639226997914 5.8011e-06 deg
node 62.84249782449232 9.5711e-05 deg
peri 290.9788745007215 9.8212e-05 deg
M 252.0636704193733 2.6451e-05 deg
tp 2457867.899734301347
(2017-Apr-24.39973430)
0.00011774 JED
period 1558.918160384492
4.27
2.1716e-05
5.946e-08
d
yr
n .2309293772748207 3.2169e-09 deg/d
Q 2.991348357068227 2.7781e-08 au
  Orbit Determination Parameters
   # obs. used (total)      915  
   data-arc span      8678 days (23.76 yr)  
   first obs. used      1991-09-14  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52154  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:22:47  

Additional Information
 Earth MOID = 1.26807 au 
 Jupiter MOID = 2.43331 au 
 T_jup = 3.383 
[ 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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