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9995 Alouette (4805 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2009995
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1606103401514072 3.728e-08  
a 2.390249302120564 7.8068e-09 au
q 2.006350548660317 8.7952e-08 au
i 2.311736423842543 4.4765e-06 deg
node 20.85121995946811 8.4547e-05 deg
peri 198.0679747764596 8.5486e-05 deg
M 189.2809919151104 1.352e-05 deg
tp 2459640.592303044378
(2022-Mar-02.09230304)
5.1641e-05 TDB
period 1349.780740182098
3.70
6.6128e-06
1.81e-08
d
yr
n .2667099842833974 1.3067e-09 deg/d
Q 2.774148055580812 9.0606e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1271  
   data-arc span      25521 days (69.87 yr)  
   first obs. used      1950-12-09  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54846  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:09:26  

Additional Information
 Earth MOID = .998852 au 
 Jupiter MOID = 2.1993 au 
 T_jup = 3.514 
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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 15.1   n/a MPO492866  
diameter diameter 2.564 km 0.550 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.245   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9995 Alouette           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The first Canadian satellite Alouette-1 was launched on 1962 Sept. 29. It was engaged in research and exploration of the upper atmosphere, especially the ionosphere. During its six-year lifespan it returned the first useful data on the ionosphere. The citation was prepared by W. Fröger.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 4805 P-L = 1981 EP22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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