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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1839086217460167 9.6728e-08  
a 3.015061947303386 3.4743e-08 au
q 2.460566060095959 2.7799e-07 au
i 17.1727968255021 9.8695e-06 deg
node 356.9869273712178 2.1465e-05 deg
peri 201.0551470664917 2.9586e-05 deg
M 276.470094562772 1.8745e-05 deg
tp 2459044.192691610058
(2020-Jul-13.69269161)
0.00010182 TDB
period 1912.24170724886
5.24
3.3052e-05
9.049e-08
d
yr
n .1882607196754073 3.254e-09 deg/d
Q 3.569557834510813 4.1132e-08 au
  Orbit Determination Parameters
   # obs. used (total)      238  
   data-arc span      8605 days (23.56 yr)  
   first obs. used      1994-04-02  
   last obs. used      2017-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60108  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 02:30:44  

Additional Information
 Earth MOID = 1.46804 au 
 Jupiter MOID = 1.43447 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 15.2   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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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