+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   9533 Aleksejleonov (1981 SA7) Classification: Main-belt Asteroid          SPK-ID: 2009533 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] 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.arc Last Updated: 2009-05-11 Alternate Designations  1981 SA7 = 1973 YK2 = 1985 PJ2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-22 08:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin