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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1835472199588926 7.5621e-08  
a 3.013639887604448 2.3651e-08 au
q 2.460494664277422 2.2616e-07 au
i 17.17580762127869 9.6403e-06 deg
node 356.9777113251411 1.7844e-05 deg
peri 201.158072598405 2.7052e-05 deg
M 29.37701758067501 1.7587e-05 deg
tp 2459044.566056409122
(2020-Jul-14.06605641)
9.32e-05 TDB
period 1910.88899812771
5.23
2.2495e-05
6.159e-08
d
yr
n .1883939885324203 2.2178e-09 deg/d
Q 3.566785110931474 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55141  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:25  

Additional Information
 Earth MOID = 1.46703 au 
 Jupiter MOID = 1.43509 au 
 T_jup = 3.156 
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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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