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14420 Massey (1991 SM)
Classification: Main-belt Asteroid          SPK-ID: 2014420
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136207041066534 7.9725e-08  
a 3.016229540324149 3.9777e-08 AU
q 2.673523416205232 2.4342e-07 AU
i 11.22021941158885 8.2867e-06 deg
node 122.364805719047 4.2621e-05 deg
peri 222.7699700466792 5.6889e-05 deg
M 122.2438243664928 3.9014e-05 deg
tp 2456150.790169620434
(2012-Aug-11.29016962)
0.00020701 JED
period 1913.352597963672
5.24
3.7849e-05
1.036e-07
d
yr
n .1881514156790222 3.7219e-09 deg/d
Q 3.358935664443067 4.4296e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      797  
   data-arc span      8216 days (22.49 yr)  
   first obs. used      1991-09-15  
   last obs. used      2014-03-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53526  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:05:42  

Additional Information
 Earth MOID = 1.67571 AU 
 T_jup = 3.209 
[ 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 12.6 mag n/a MPO250354  

14420 Massey           Discovered 1991 Sept. 30 by R. H. McNaught at Siding Spring Observatory.
Steven (Steve) Massey (b. 1962) was a pioneer in the use of modern video cameras in astronomical imaging. He has published two books on video imaging of astronomical objects and encourages amateurs and school groups in this field.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040504/MPCPages.arcLast Updated: 2004-05-11

Alternate Designations
 1991 SM = 1999 CQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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