+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2153412549335368 3.581e-08   a 2.227886286184892 4.4635e-09 au q 1.748130457468621 7.9135e-08 au i 3.551266915677776 3.6096e-06 deg node 163.4374968013948 4.7778e-05 deg peri 156.1751388822072 4.8503e-05 deg M 212.3338087746211 1.0636e-05 deg tp 2459498.714691043718 (2021-Oct-11.21469104) 3.667e-05 TDB period 1214.613089749098 3.33 3.6502e-06 9.994e-09 d yr n .296390680323036 8.9072e-10 deg/d Q 2.707642114901163 5.4247e-09 au   Orbit Determination Parameters    # obs. used (total)      3117      data-arc span      30909 days (84.62 yr)      first obs. used      1935-10-29      last obs. used      2020-06-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43343      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:30:20   Additional Information  Earth MOID = .735993 au   Jupiter MOID = 2.60827 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 12.4   n/a MPO416719   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. 2019-August); 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 ] 2020-Aug-04 13:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin