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9533 Aleksejleonov (1981 SA7)
Classification: Main-belt Asteroid          SPK-ID: 2009533
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1753519908896807 4.2701e-08  
a 2.617769368714044 9.581e-09 au
q 2.158738298220014 1.1388e-07 au
i 6.608471060162013 4.7292e-06 deg
node 54.62926528322328 3.665e-05 deg
peri 355.0504754867388 3.8883e-05 deg
M 20.76769319347737 1.1813e-05 deg
tp 2458911.255541714892
5.0707e-05 TDB
period 1547.018471590738
n .232705689434869 1.2775e-09 deg/d
Q 3.076800439208074 1.1261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1997  
   data-arc span      16846 days (46.12 yr)  
   first obs. used      1973-12-20  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49141  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:21:36  

Additional Information
 Earth MOID = 1.16932 au 
 Jupiter MOID = 2.30337 au 
 T_jup = 3.375 
[ 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 13.5   n/a MPO358723  
diameter diameter 9.552 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.064   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

9533 Aleksejleonov           Discovered 1981 Sept. 28 by L. V. Zhuravleva at the Crimean Astrophysical Observatory.
Aleksej Arkhipovich Leonov (b. 1934), during a spaceflight in 1965 with P. I. Belyaev on Voskhod 2, became the first human to "spacewalk" outside a spacecraft when he left the spacecraft for approximately 10 minutes. He was also the commander of the Soyuz spacecraft that linked with the Apollo spacecraft in 1975.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1981 SA7 = 1973 YK2 = 1985 PJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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