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202806 Sierrastars (2008 SW2)
Classification: Main-belt Asteroid          SPK-ID: 2202806
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2325542506695063 1.1208e-07  
a 2.230893983796623 3.1934e-08 AU
q 1.71209010507169 2.6152e-07 AU
i 4.681613154898965 1.6115e-05 deg
node 33.60273446778624 8.3568e-05 deg
peri 303.8637262786327 9.1664e-05 deg
M 332.4476190572725 3.5818e-05 deg
tp 2457093.647983800257
(2015-Mar-12.14798380)
0.00012217 JED
period 1217.073553018791
3.33
2.6132e-05
7.155e-08
d
yr
n .2957914902571559 6.3511e-09 deg/d
Q 2.749697862521557 3.936e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      5723 days (15.67 yr)  
   first obs. used      1998-09-26  
   last obs. used      2014-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5979  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 17:45:07  

Additional Information
 Earth MOID = .709204 AU 
 T_jup = 3.602 
[ 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 17.5 mag n/a MPO297244  

202806 Sierrastars           Discovered 2008 Sept. 23 by F. Tozzi at Sierra Stars Observatory.
Sierra Stars Observatory, located in Markleeville, California, has been operated by Rich and Kathy Fox Williams since early 2007. At the end of 2008 the Sierra Stars Observatories Network was established.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

[ show close-approach data ]
Alternate Designations
 2008 SW2 = 1998 SC135 = 2004 HG52 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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