+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1212 Francette (1931 XC) Classification: Outer Main-belt Asteroid          SPK-ID: 2001212 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1903659749148386 3.5032e-08   a 3.949185104890915 2.3361e-08 au q 3.197394632279197 1.3776e-07 au i 7.591965768720035 4.3323e-06 deg node 149.561683326996 3.2303e-05 deg peri 348.2586944728752 3.4373e-05 deg M 48.32375141293972 1.1314e-05 deg tp 2458615.715292850685 (2019-May-12.21529285) 8.9843e-05 TDB period 2866.550930411853 7.85 2.5435e-05 6.964e-08 d yr n .1255864656652993 1.1143e-09 deg/d Q 4.700975577502633 2.7808e-08 au   Orbit Determination Parameters    # obs. used (total)      2888      data-arc span      32338 days (88.54 yr)      first obs. used      1931-12-03      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45907      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:27:43   Additional Information  Earth MOID = 2.21139 au   Jupiter MOID = .348675 au   T_jup = 3.013  [ 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 9.6   n/a MPO502164 IRAS observations used: 15 diameter diameter 76.387 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   rotation period rot_per 22.433 h n/a LCDB (Rev. 2019-August); 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: [Warner, B.D.; Stephens, R.D. (2017) Minor Planet Bull. 44, 36-41.] geometric albedo albedo 0.046   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)   B-V BV 0.693   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.42, mean=7.63, max.=12.48) deg. U-B UB 0.215   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.42, mean=7.63, max.=12.48) deg. Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1212 Francette (1931 XC)          Discovered 1931-Dec-03 by Boyer, L. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1931 XC = 1949 HB1 = 1949 HZ = 1965 JB = A918 KA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-08 10:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin