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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1836510223836328 7.5593e-08  
a 3.013950928942282 2.3769e-08 au
q 2.460435759427932 2.2621e-07 au
i 17.17537999593846 9.64e-06 deg
node 356.9776038748563 1.7844e-05 deg
peri 201.1329224967978 2.7044e-05 deg
M 351.7163554320975 1.7539e-05 deg
tp 2459044.476599851537
(2020-Jul-13.97659985)
9.315e-05 TDB
period 1911.184843432039
5.23
2.2608e-05
6.19e-08
d
yr
n .1883648257452296 2.2282e-09 deg/d
Q 3.567466098456631 2.8134e-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 = 1.46758 au 
 Jupiter MOID = 1.43537 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 15.2   n/a MPO422175  
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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