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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09875094837270651 5.1292e-08  
a 2.944790408089817 2.8982e-08 AU
q 2.653989562532098 1.5676e-07 AU
i 2.250982043532544 7.2987e-06 deg
node 179.0274007814365 0.00014183 deg
peri 264.358755860257 0.00014746 deg
M 341.7295882922076 4.0711e-05 deg
tp 2457094.175462235142
(2015-Mar-12.67546224)
0.0002092 JED
period 1845.78032197643
5.05
2.7249e-05
7.46e-08
d
yr
n .1950394614753061 2.8793e-09 deg/d
Q 3.235591253647536 3.1844e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1023  
   data-arc span      23540 days (64.45 yr)  
   first obs. used      1950-03-22  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49465  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:55:09  

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 13.3 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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