+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   203 Pompeja (A879 SA) Classification: Main-belt Asteroid          SPK-ID: 2000203 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 116 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05888228416022841 1.9895e-08   a 2.737416848987092 7.2543e-09 au q 2.576231492220037 5.5969e-08 au i 3.172124832504218 5.1954e-07 deg node 347.7202510328254 2.8837e-06 deg peri 59.85371828018127 1.5824e-05 deg M 33.09692197672958 1.3852e-05 deg tp 2459048.412004388701 (2020-Jul-17.91200439) 6.3762e-05 TDB period 1654.283091900917 4.53 6.5759e-06 1.8e-08 d yr n .2176169252786887 8.6504e-10 deg/d Q 2.898602205754147 7.6814e-09 au   Orbit Determination Parameters    # obs. used (total)      3244      data-arc span      51679 days (141.49 yr)      first obs. used      1879-09-26      last obs. used      2021-03-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4157      source      ORB      producer      Otto Matic      solution date      2021-May-03 18:01:45   Additional Information  Earth MOID = 1.58637 au   Jupiter MOID = 2.32017 au   T_jup = 3.347  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.85   n/a E2021B10 IRAS observations used: 13 diameter diameter 124.592 km 1.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 24.052 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F.; Ferrero, A.; Hamanowa, H; Hamanowa, H. (2012) Minor Planet Bull. 39, 99.] geometric albedo albedo 0.036   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.702   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.37 deg. U-B UB 0.293   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.14, mean=7.26, max.=8.37) deg. Tholen spectral type spec_T DCX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 203 Pompeja (A879 SA)          Discovered 1879-Sep-25 by Peters, C. H. F. at Clinton Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A879 SA = A895 EA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-23 03:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin