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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09874274603301231 5.1837e-08  
a 2.94500183625646 3.0494e-08 AU
q 2.654204267872233 1.5738e-07 AU
i 2.250899003423068 7.4245e-06 deg
node 179.0258207428102 0.00014465 deg
peri 264.2911043509285 0.00015069 deg
M 302.7828745698595 4.3058e-05 deg
tp 2457093.893383910233
(2015-Mar-12.39338391)
0.00022261 JED
period 1845.979108766013
5.05
2.8671e-05
7.85e-08
d
yr
n .1950184583836652 3.029e-09 deg/d
Q 3.235799404640687 3.3505e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      23268 days (63.70 yr)  
   first obs. used      1950-03-22  
   last obs. used      2013-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49841  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:33:32  

Additional Information
 Earth MOID = 1.67065 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 13.3 mag n/a PDS3 (MPC 32652)  

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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