+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09284092583870078 3.2997e-08   a 2.260437207160443 5.6804e-09 au q 2.050576124047421 7.4114e-08 au i 6.024566231089736 3.5309e-06 deg node 223.211457903056 3.1217e-05 deg peri 356.599459488287 3.6405e-05 deg M 226.8703226240234 2.0089e-05 deg tp 2459459.549455415957 (2021-Sep-02.04945542) 6.9741e-05 TDB period 1241.329560823868 3.40 4.6792e-06 1.281e-08 d yr n .2900116225066522 1.0932e-09 deg/d Q 2.470298290273466 6.2078e-09 au   Orbit Determination Parameters    # obs. used (total)      2806      data-arc span      30957 days (84.76 yr)      first obs. used      1936-02-14      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41985      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:00:10   Additional Information  Earth MOID = 1.04242 au   Jupiter MOID = 2.50313 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 13.0   n/a MPO502166   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-Jan-21 08:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin