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209149 Chrismackenzie (2003 SF421)
Classification: Main-belt Asteroid          SPK-ID: 2209149
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1460364727285803 3.9162e-07  
a 2.521161344083179 2.5135e-08 au
q 2.152979834213625 9.9355e-07 au
i 2.383962621731732 1.5166e-05 deg
node 63.20952911228561 0.00062598 deg
peri 1.820997580934734 0.00070771 deg
M 29.64607974610865 0.00037444 deg
tp 2457480.089555926420
(2016-Apr-01.58955593)
0.0015202 JED
period 1462.175108402951
4.00
2.1866e-05
5.987e-08
d
yr
n .2462085409135484 3.6819e-09 deg/d
Q 2.889342853952733 2.8805e-08 au
  Orbit Determination Parameters
   # obs. used (total)      102  
   data-arc span      7402 days (20.27 yr)  
   first obs. used      1995-09-25  
   last obs. used      2015-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58398  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-26 10:09:17  

Additional Information
 Earth MOID = 1.16485 au 
 Jupiter MOID = 2.40807 au 
 T_jup = 3.440 
[ 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 17.8 mag n/a MPO257915  

209149 Chrismackenzie           Discovered 2003 Sept. 29 by the Sloan Digital Sky Survey at Apache Point.
Christopher MacKenzie (1983-2013) was one of the 19 elite Prescott's Granite Mountain Hotshot firefighters who lost their lives battling a blaze on a ridge in Yarnell, AZ. Crews such as the Hotshots are connected to astronomy through their brave efforts to protect forests and the observatories within them from fire threats.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-10-18Last Updated: 2013-10-21

Alternate Designations
 2003 SF421 = 1995 SW77 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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