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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1603004247650385 3.5541e-08  
a 2.390867077273752 7.6588e-09 au
q 2.007610069230024 8.419e-08 au
i 2.311528560203302 4.2526e-06 deg
node 20.84184147227851 8.3345e-05 deg
peri 198.0272989129864 8.4252e-05 deg
M 294.9077671998609 1.3576e-05 deg
tp 2459640.650851190257
(2022-Mar-02.15085119)
5.1341e-05 TDB
period 1350.304063134006
3.70
6.4882e-06
1.776e-08
d
yr
n .2666066183378381 1.2811e-09 deg/d
Q 2.774124085317481 8.8865e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1374  
   data-arc span      25660 days (70.25 yr)  
   first obs. used      1950-12-09  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:46:31  

Additional Information
 Earth MOID = 1.00069 au 
 Jupiter MOID = 2.197 au 
 T_jup = 3.513 
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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 15.06   n/a E2021B10  
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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