+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   372 Palma (A893 QB) Classification: Main-belt Asteroid          SPK-ID: 2000372 [ 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 85 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .258137953842581 3.4711e-08   a 3.152042995206068 7.4404e-09 au q 2.338381065999734 1.091e-07 au i 23.8248946543951 4.9129e-06 deg node 327.3221642321312 1.0384e-05 deg peri 115.6459224189217 1.4671e-05 deg M 162.5232930693159 9.1794e-06 deg tp 2458077.716673439295 (2017-Nov-20.21667344) 5.0405e-05 TDB period 2044.026990150698 5.60 7.2374e-06 1.981e-08 d yr n .1761229189901541 6.2361e-10 deg/d Q 3.965704924412403 9.3611e-09 au   Orbit Determination Parameters    # obs. used (total)      2518      data-arc span      46331 days (126.85 yr)      first obs. used      1893-09-30      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44335      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:14:57   Additional Information  Earth MOID = 1.45054 au   Jupiter MOID = 1.57411 au   T_jup = 3.027  [ 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 7.5   n/a MPO265957   diameter diameter 173.642 km 2.840 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 8.567 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Zappala, V.; Scaltriti, F.; Di Martino, M. (1983) Icarus 56, 325-344.] [Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.] [Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.059   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   Tholen spectral type spec_T BFC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979) SMASSII spectral type spec_B B   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) 372 Palma (A893 QB)          Discovered 1893-Aug-19 by Charlois, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A893 QB = 1940 CN = 1949 SP1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-26 06:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin