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241509 Sessler (2009 DT26)
Classification: Main-belt Asteroid          SPK-ID: 2241509
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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1920078753325712 1.163e-07  
a 3.05520143161196 1.0655e-07 AU
q 2.468578696015118 3.5074e-07 AU
i .4068613981073166 1.4516e-05 deg
node 39.03741373852333 0.0013189 deg
peri 215.8911988913304 0.0013194 deg
M 294.3646169415757 3.3801e-05 deg
tp 2457356.126179043336
(2015-Nov-29.62617904)
0.00018792 JED
period 1950.554997776754
5.34
0.00010204
2.794e-07
d
yr
n .1845628553977348 9.655e-09 deg/d
Q 3.641824167208803 1.2701e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      88  
   data-arc span      6701 days (18.35 yr)  
   first obs. used      1995-09-17  
   last obs. used      2014-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61777  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-12 03:08:50  

Additional Information
 Earth MOID = 1.45542 AU 
 T_jup = 3.207 
[ 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 16.8 mag n/a MPO285338  

241509 Sessler           Discovered 2009 Feb. 22 by F. Hormuth at Calar Alto.
Gerhard M. Sessler (b. 1931) is professor of Electroacoustics at Technischen Universität Darmstadt. He invented the silicone microphone and, together with James West, the electret microphone used in most telephones. He also has a strong interest in astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

[ show close-approach data ]
Alternate Designations
 2009 DT26 = 1995 SS6 = 2006 SF223 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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