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74503 Madola (1999 DN4)
Classification: Main-belt Asteroid          SPK-ID: 2074503
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1835472218628692 7.5621e-08  
a 3.013639885485199 2.3651e-08 au
q 2.460494656809256 2.2616e-07 au
i 17.17580763053727 9.6403e-06 deg
node 356.9777112793897 1.7844e-05 deg
peri 201.1580724185912 2.7052e-05 deg
M 29.37701800450622 1.7587e-05 deg
tp 2459044.566054323899
(2020-Jul-14.06605432)
9.3199e-05 TDB
period 1910.88899611205
5.23
2.2495e-05
6.159e-08
d
yr
n .1883939887311436 2.2178e-09 deg/d
Q 3.566785114161144 2.7993e-08 au
  Orbit Determination Parameters
   # obs. used (total)      386  
   data-arc span      9547 days (26.14 yr)  
   first obs. used      1994-04-02  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55134  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:14:00  

Additional Information
 Earth MOID = 1.46703 au 
 Jupiter MOID = 1.43509 au 
 T_jup = 3.156 
[ 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 15.44   n/a E2021B10  
diameter diameter 4.481 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.085   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74503 Madola           Discovered 1999 Feb. 23 by D. Bergeron at Val-des-Bois.
Christian Marois (b. 1974), René Doyon (b. 1963) and David Lafrenière (b. 1978) developed instruments that allowed seeing an extrasolar planetary system. Doyon was director of the Mt. Mégantic Observatory; Marois and Lafrenière were postdoctoral fellows at the Herzberg Institute and the University of Toronto.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090409/MPCPages.arcLast Updated: 2009-04-10

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