+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1377 Roberbauxa (1936 CD) Classification: Main-belt Asteroid          SPK-ID: 2001377 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09271903539180738 2.9884e-08   a 2.260576828095558 5.3697e-09 au q 2.050978325165466 6.781e-08 au i 6.024132197519974 3.2941e-06 deg node 223.2043770317117 3.1168e-05 deg peri 356.5901307379523 3.6148e-05 deg M 284.8739750988746 1.9289e-05 deg tp 2459459.568877476059 (2021-Sep-02.06887748) 6.6698e-05 TDB period 1241.444572824509 3.40 4.4233e-06 1.211e-08 d yr n .2899847547610888 1.0332e-09 deg/d Q 2.47017533102565 5.8676e-09 au   Orbit Determination Parameters    # obs. used (total)      2950      data-arc span      31020 days (84.93 yr)      first obs. used      1936-02-14      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41522      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:54:51   Additional Information  Earth MOID = 1.04169 au   Jupiter MOID = 2.50209 au   T_jup = 3.607  [ 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 13.02   n/a E2021B10   diameter diameter 6.217 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 7.3627 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Ditteon, R.; West, J. (2011) Minor Planet Bull. 38, 214-217.] geometric albedo albedo 0.263   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1377 Roberbauxa (1936 CD)          Discovered 1936-Feb-14 by Boyer, L. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 06:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin