+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15220 Sumerkin (1981 SC7) Classification: Main-belt Asteroid          SPK-ID: 2015220 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2445657125054564 1.5362e-08   a 2.529911797514969 9.0686e-09 au q 1.911182116179761 3.946e-08 au i 8.655423889865578 1.0009e-06 deg node 40.16312699506451 7.2863e-06 deg peri 344.5977233733693 9.3749e-06 deg M 260.6200248363538 8.1478e-06 deg tp 2459606.244723130198 (2022-Jan-26.74472313) 3.4795e-05 TDB period 1469.794091680393 4.02 7.9029e-06 2.164e-08 d yr n .2449322677494353 1.317e-09 deg/d Q 3.148641478850178 1.1286e-08 au   Orbit Determination Parameters    # obs. used (total)      1934      data-arc span      18535 days (50.75 yr)      first obs. used      1969-10-15      last obs. used      2020-07-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48215      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:52:09   Additional Information  Earth MOID = .915888 au   Jupiter MOID = 2.30678 au   T_jup = 3.394  [ show covariance matrix ] [ 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 13.90   n/a MPCxxxxx   15220 Sumerkin           Discovered 1981 Sept. 28 by L. V. Zhuravleva at the Crimean Astrophysical Observatory. Yurij Vasil'evich Sumerkin (b. 1935) is a well-known Russian scientist in the field of ship mechanical engineering, ship building and ship repair. He is an author of more than 100 scientific and educational works, including eight textbooks on the technology of ship mechanical engineering. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20051215/MPCPages.arc Last Updated: 2006-03-22 [ show close-approach data ] Alternate Designations  1981 SC7 = 1969 TL6 = 1969 UJ2 = 1977 SL3 = 1981 WG7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-10 23:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin