+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1392 Pierre (1936 FO) Classification: Main-belt Asteroid          SPK-ID: 2001392 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2030182276854621 4.3804e-08   a 2.60711590919093 7.9449e-09 au q 2.077823857936415 1.1319e-07 au i 12.26412880530361 5.6138e-06 deg node 358.2293790168853 1.4215e-05 deg peri 44.17728481939263 1.9113e-05 deg M 118.5635896368573 1.0971e-05 deg tp 2458494.106904771348 (2019-Jan-10.60690477) 4.6811e-05 TDB period 1537.5843025728 4.21 7.0284e-06 1.924e-08 d yr n .2341335037029328 1.0702e-09 deg/d Q 3.136407960445445 9.5579e-09 au   Orbit Determination Parameters    # obs. used (total)      2672      data-arc span      30773 days (84.25 yr)      first obs. used      1936-03-16      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39254      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:30:40   Additional Information  Earth MOID = 1.1028 au   Jupiter MOID = 2.39147 au   T_jup = 3.350  [ 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 11.9   n/a MPO502166 IRAS observations used: 4 diameter diameter 26.44 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 rotation period rot_per 18. 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: [Barucci, M.A.; Di Martino, M.; Fulchignoni, M. (1992) Astron. J. 103, 1679-1686.] geometric albedo albedo 0.0519   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 B-V BV 0.757   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.15 deg. U-B UB 0.258   0.073 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.15 deg. Tholen spectral type spec_T DX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 1392 Pierre (1936 FO)          Discovered 1936-Mar-16 by Boyer, L. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1936 FO = 1938 SZ = 1955 TZ = 1959 SH = A917 UB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-23 20:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin