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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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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
(2020-Mar-02.75554171)
5.0707e-05 TDB
period 1547.018471590738
4.24
8.4931e-06
2.325e-08
d
yr
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 
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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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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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