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JPL Small-Body Database Browser
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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1606103756073798 3.7411e-08  
a 2.390249302339949 7.8322e-09 au
q 2.006350464095852 8.8268e-08 au
i 2.311731436863061 4.4873e-06 deg
node 20.85129285127338 8.54e-05 deg
peri 198.0679009189681 8.6338e-05 deg
M 189.2809916393859 1.3533e-05 deg
tp 2459640.592304166301
(2022-Mar-02.09230417)
5.1681e-05 TDB
period 1349.780740367929
3.70
6.6343e-06
1.816e-08
d
yr
n .2667099842466782 1.3109e-09 deg/d
Q 2.774148140584046 9.0901e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1252  
   data-arc span      25154 days (68.87 yr)  
   first obs. used      1950-12-09  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55392  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:21:00  

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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