+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3970 Herran (1979 ME9) Classification: Main-belt Asteroid          SPK-ID: 2003970 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1339449095600044 3.348e-08   a 2.556339825410473 1.0679e-08 au q 2.21393111869123 8.8414e-08 au i 15.13093936246617 4.5258e-06 deg node 21.67654259872578 1.0264e-05 deg peri 303.8257261707608 2.0382e-05 deg M 2.272028195906101 1.6214e-05 deg tp 2458991.078121016906 (2020-May-21.57812102) 6.7257e-05 TDB period 1492.884833042792 4.09 9.3545e-06 2.561e-08 d yr n .2411438525142287 1.511e-09 deg/d Q 2.898748532129717 1.2109e-08 au   Orbit Determination Parameters    # obs. used (total)      2656      data-arc span      23756 days (65.04 yr)      first obs. used      1955-10-24      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .34602      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:15:03   Additional Information  Earth MOID = 1.24136 au   Jupiter MOID = 2.56646 au   T_jup = 3.377  [ 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 12.3   n/a MPO384788   diameter diameter 8.564 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 8.09 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.264   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   3970 Herran           Discovered 1979 June 28 by C. Torres at Cerro El Roble. Jose Antonio Ruiz de la Herran Villagomez (b. 1925), currently technical advisor of the Museum Universum in Mexico City, has been active in astronomy both as a professional and an amateur. He was involved in the design and installation of Mexico's largest telescopes and is widely known for his public outreach. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20031110/MPCPages.arc Last Updated: 2003-11-12 [ show close-approach data ] Alternate Designations  1979 ME9 = 1963 UT = 1971 ST1 = 1979 RH = 1982 FQ3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 15:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin