+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1533 Saimaa (1939 BD) Classification: Main-belt Asteroid          SPK-ID: 2001533 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03998844254137004 3.5887e-08   a 3.009809418483119 1.185e-08 au q 2.889451827491633 1.0931e-07 au i 10.71417252093543 4.0337e-06 deg node 156.5507280953586 1.6459e-05 deg peri 9.459534874429378 4.4436e-05 deg M 176.5578478652957 4.2888e-05 deg tp 2458065.112745790226 (2017-Nov-07.61274579) 0.00022499 TDB period 1907.246919844836 5.22 1.1263e-05 3.084e-08 d yr n .1887537456499275 1.1147e-09 deg/d Q 3.130167009474606 1.2324e-08 au   Orbit Determination Parameters    # obs. used (total)      3144      data-arc span      30766 days (84.23 yr)      first obs. used      1936-08-17      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43641      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:01:12   Additional Information  Earth MOID = 1.8976 au   Jupiter MOID = 1.84302 au   T_jup = 3.222  [ 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 10.7   n/a MPO492768 IRAS observations used: 5 diameter diameter 24.298 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 7.115 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Benishek, V. (2018) Minor Planet Bull. 45, 386-389.] [Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.] geometric albedo albedo 0.141   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.790   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.42, mean=4.70, max.=5.35) deg. U-B UB 0.450   0.079 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.42, mean=4.70, max.=5.35) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 1533 Saimaa (1939 BD)          Discovered 1939-Jan-19 by Vaisala, Y. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1939 BD = 1934 FA = 1936 QC = 1936 RP  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 06:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin