+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1376 Michelle (1935 UH) Classification: Main-belt Asteroid          SPK-ID: 2001376 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2154625909254046 8.3001e-09   a 2.227551573572964 4.0105e-09 au q 1.747597540110971 1.8268e-08 au i 3.551598037142012 2.8183e-07 deg node 163.4386063709799 1.4887e-05 deg peri 156.2075788742009 1.4986e-05 deg M 271.5860998222819 5.1804e-06 deg tp 2459498.734668418929 (2021-Oct-11.23466842) 1.788e-05 TDB period 1214.339378932546 3.32 3.2795e-06 8.979e-09 d yr n .2964574864700961 8.0062e-10 deg/d Q 2.707505607034957 4.8746e-09 au   Orbit Determination Parameters    # obs. used (total)      3240      data-arc span      31181 days (85.37 yr)      first obs. used      1935-10-29      last obs. used      2021-03-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43322      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 12:21:53   Additional Information  Earth MOID = .733495 au   Jupiter MOID = 2.6084 au   T_jup = 3.611  [ 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 12.61   n/a MPCxxxxx   diameter diameter 7.053 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.9748 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.] [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hamanowa, H.; Hamanowa, H. (2009) Minor Planet Bull. 36, 87-88.] [Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.] geometric albedo albedo 0.267   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1376 Michelle (1935 UH)          Discovered 1935-Oct-29 by Reiss, G. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1935 UH = 1931 JK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-23 11:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin