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9497 Dwingeloo (1001 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2009497
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019872873721208 2.7975e-08  
a 2.94529418905443 1.204e-08 au
q 2.644911624199898 8.3617e-08 au
i 2.255346979737777 3.4566e-06 deg
node 178.9856204653572 8.0407e-05 deg
peri 263.7477408877148 8.2451e-05 deg
M 51.26928876387852 1.7139e-05 deg
tp 2458937.566307998939
(2020-Mar-29.06630800)
8.7897e-05 TDB
period 1846.253993425231
5.05
1.1321e-05
3.1e-08
d
yr
n .1949894225182507 1.1956e-09 deg/d
Q 3.245676753908961 1.3268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2496  
   data-arc span      25935 days (71.01 yr)  
   first obs. used      1950-03-22  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45786  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:18:34  

Additional Information
 Earth MOID = 1.6617 au 
 Jupiter MOID = 1.95357 au 
 T_jup = 3.262 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.52   n/a E2021B10  
diameter diameter 5.467 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.310   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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