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157194 Saddlemyer (2004 QR16)
Classification: Main-belt Asteroid          SPK-ID: 2157194
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04213860924005838 2.1705e-07  
a 2.607605092205695 4.5957e-08 AU
q 2.497724240172853 5.9461e-07 AU
i 5.133645337189471 9.0708e-06 deg
node 93.84025071423272 0.00014055 deg
peri 79.65759543403692 0.00020451 deg
M 314.7006726765071 0.00014121 deg
tp 2457194.030941667792
0.00060225 JED
period 1538.017077005745
n .2340676221234541 6.1879e-09 deg/d
Q 2.717485944238538 4.7894e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      7673 days (21.01 yr)  
   first obs. used      1994-02-13  
   last obs. used      2015-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .64672  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 20:36:00  

Additional Information
 Earth MOID = 1.50967 AU 
 T_jup = 3.404 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2 mag n/a MPO325561  

157194 Saddlemyer           Discovered 2004 Aug. 21 by D. D. Balam at Mauna Kea.
Leslie K. Saddlemyer (b. 1959) is a systems engineer at the Herzberg Institute of Astrophysics, National Research Council of Canada. Currently the project manager for the Gemini Planetary Imager, he has been responsible for care and maintenance of the 1.82-m Plaskett Telescope at the Dominion Astrophysical Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Mar-28 11:04 UT
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