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9497 Dwingeloo (1001 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2009497
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0987509421618725 5.0565e-08  
a 2.944790399321922 2.4367e-08 AU
q 2.653989572919645 1.5627e-07 AU
i 2.250976017867321 5.7551e-06 deg
node 179.0274493914683 0.00013406 deg
peri 264.3586950297321 0.0001381 deg
M 341.7296031534106 3.0429e-05 deg
tp 2457094.175385620897
(2015-Mar-12.67538562)
0.00015597 JED
period 1845.780313732919
5.05
2.291e-05
6.272e-08
d
yr
n .1950394623463794 2.4209e-09 deg/d
Q 3.235591225724198 2.6774e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1336  
   data-arc span      23741 days (65.00 yr)  
   first obs. used      1950-03-22  
   last obs. used      2015-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47687  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:35:14  

Additional Information
 Earth MOID = 1.67086 AU 
 T_jup = 3.263 
[ 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 13.4 mag n/a MPO319204  

9497 Dwingeloo           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The Dwingeloo 25-m radio telescope in The Netherlands supported investigations of the 21-cm emission from hydrogen in our Galaxy. Its principal contributions include the discoveries of the 3-kpc arm and the high-velocity-cloud phenomenon, as well as studies of the galactic center. The name was suggested by W. A. Froger.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1001 T-2 = 1993 PA7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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