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4843 Megantic (1990 DR4)
Classification: Main-belt Asteroid          SPK-ID: 2004843
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174660829359704 3.2898e-08  
a 3.090226426984141 1.4266e-08 au
q 2.727229633221095 1.0348e-07 au
i 10.99713499994586 3.6928e-06 deg
node 162.246005248876 1.6014e-05 deg
peri 222.5877202073304 2.1268e-05 deg
M 320.1730408300202 1.2829e-05 deg
tp 2459220.012132206927
(2021-Jan-05.51213221)
7.049e-05 TDB
period 1984.192849301425
5.43
1.374e-05
3.762e-08
d
yr
n .1814339771090019 1.2564e-09 deg/d
Q 3.453223220747188 1.5942e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2807  
   data-arc span      41184 days (112.76 yr)  
   first obs. used      1908-01-23  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4599  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:48:14  

Additional Information
 Earth MOID = 1.74105 au 
 Jupiter MOID = 2.04481 au 
 T_jup = 3.186 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO435745  
diameter diameter 26.690 km 0.432 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.047   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4843 Mégantic           Discovered 1990 Feb. 28 by H. Debehogne at the European Southern Observatory.
Named for Mont Mégantic, the largest observatory in Québec. Founded in 1978, its mission is to promote research in astrophysics, to train students and to promote astronomy in the local culture. The observatory is jointly operated by the Université de Montréal and the Université Laval. Name proposed by the discoverer, following a suggestion by P. Bastien and Y. Dutil.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1990 DR4 = 1982 RT1 = 1990 EO10 = A908 BH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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