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9405 Johnratje (1994 WQ1)
Classification: Main-belt Asteroid          SPK-ID: 2009405
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06751009244223814 7.7166e-08  
a 2.875227371768847 2.4668e-08 AU
q 2.681120506108279 2.2531e-07 AU
i 2.727672376493512 8.6389e-06 deg
node 45.01659645662458 0.00011798 deg
peri 8.214766411085758 0.0001285 deg
M 67.01243776014692 4.9905e-05 deg
tp 2456669.018241356252
(2014-Jan-11.51824136)
0.00024678 JED
period 1780.765438482799
4.88
2.2917e-05
6.274e-08
d
yr
n .2021602577297983 2.6016e-09 deg/d
Q 3.069334237429416 2.6333e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1128  
   data-arc span      21776 days (59.62 yr)  
   first obs. used      1954-07-29  
   last obs. used      2014-03-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50119  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:42:24  

Additional Information
 Earth MOID = 1.6917 AU 
 T_jup = 3.291 
[ 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 13.2 mag n/a MPO267745  

9405 Johnratje           Discovered 1994 Nov. 27 by T. Kobayashi at Oizumi.
Since 1993 John R. Ratje (b. 1946) has been the assistant director and site manager of Mt. Graham International Observatory, a division of Steward Observatory. Before joining Steward Observatory in 1984, he was an oil-company engineer and manager.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111012/MPCPages.arcLast Updated: 2011-10-13

Alternate Designations
 1994 WQ1 = 1978 NG6 = 1984 WC5 = 1991 FZ5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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