+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1280 Baillauda (1933 QB) Classification: Outer Main-belt Asteroid          SPK-ID: 2001280 [ 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 61 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04918953912026774 3.2579e-08   a 3.414502033169029 1.5122e-08 au q 3.246544251832228 1.1351e-07 au i 6.461293988749887 3.717e-06 deg node 293.0573442632218 3.1263e-05 deg peri 97.76880886438396 5.0443e-05 deg M 219.350845539033 4.0307e-05 deg tp 2459900.876425250552 (2022-Nov-17.37642525) 0.0002598 TDB period 2304.567804423972 6.31 1.531e-05 4.192e-08 d yr n .1562115027854354 1.0377e-09 deg/d Q 3.58245981450583 1.5866e-08 au   Orbit Determination Parameters    # obs. used (total)      2899      data-arc span      31829 days (87.14 yr)      first obs. used      1933-08-18      last obs. used      2020-10-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43027      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:20:39   Additional Information  Earth MOID = 2.26072 au   Jupiter MOID = 1.71125 au   T_jup = 3.132  [ 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 10.1   n/a MPO473780 IRAS observations used: 18 diameter diameter 50.83 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 rotation period rot_per 12.6 h n/a LCDB (Rev. 2020-October); 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: [Lagerkvist, C.-I.; Erikson, A.; Debehogne, H.; Festin, L.; et al. (1995) Astron. Astrophys. Suppl. Ser. 113, 115-129.] geometric albedo albedo 0.0505   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 B-V BV 0.671   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.73 deg. U-B UB 0.360   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.73 deg. Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 1280 Baillauda (1933 QB)          Discovered 1933-Aug-18 by Delporte, E. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1933 QB = 1931 HE = 1946 SF = 1959 UK = 1961 AN = A912 GB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 09:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin