+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2912 Lapalma (1942 DM) Classification: Main-belt Asteroid          SPK-ID: 2002912 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07169298072383513 3.899e-08   a 2.288614420723827 7.0185e-09 au q 2.124536831174582 9.0845e-08 au i 7.2787099647072 3.2034e-06 deg node 108.1389901911705 3.1968e-05 deg peri 75.97264716754509 3.9483e-05 deg M 182.6487475275513 2.4659e-05 deg tp 2459623.501555719076 (2022-Feb-13.00155572) 8.7509e-05 TDB period 1264.612214079001 3.46 5.8173e-06 1.593e-08 d yr n .284672246552816 1.3095e-09 deg/d Q 2.452692010273071 7.5217e-09 au   Orbit Determination Parameters    # obs. used (total)      2627      data-arc span      28761 days (78.74 yr)      first obs. used      1942-02-18      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44294      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:09:04   Additional Information  Earth MOID = 1.1409 au   Jupiter MOID = 2.52849 au   T_jup = 3.586  [ 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 12.6   n/a MPO384777   diameter diameter 6.519 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 5.71076 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Brinsfield, J. (2008) Minor Planet Bull. 35, 119-122.] [Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.456   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B V   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) 2912 Lapalma (1942 DM)          Discovered 1942-Feb-18 by Oterma, L. at Turku Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1942 DM = 1956 EN = 1973 AJ2 = 1973 CB = 1979 YJ = 1980 BG = 1980 DY5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-24 22:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin