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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1754848423945101 1.2488e-08  
a 2.618055792388 8.5056e-09 au
q 2.158626684280758 3.2744e-08 au
i 6.608048305079759 5.6457e-07 deg
node 54.62416022024443 4.6449e-06 deg
peri 355.0532057333309 7.4985e-06 deg
M 67.2953726321786 4.3727e-06 deg
tp 2458911.265912945895
(2020-Mar-02.76591295)
1.8398e-05 TDB
period 1547.272379463558
4.24
7.5402e-06
2.064e-08
d
yr
n .2326675023597414 1.1338e-09 deg/d
Q 3.077484900495242 9.9982e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2358  
   data-arc span      17257 days (47.25 yr)  
   first obs. used      1973-12-20  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4721  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:19:03  

Additional Information
 Earth MOID = 1.16836 au 
 Jupiter MOID = 2.30358 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 13.58   n/a MPCxxxxx  
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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