+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3861 Lorenz (A910 FA) Classification: Main-belt Asteroid          SPK-ID: 2003861 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .19044944545171 4.4484e-08   a 2.553086867484379 7.5457e-09 au q 2.066852889381936 1.1697e-07 au i 5.671927492503111 3.5735e-06 deg node 198.0937416197056 3.2867e-05 deg peri 342.9886502215652 3.385e-05 deg M 346.38225018067 1.0003e-05 deg tp 2459056.863722087996 (2020-Jul-26.36372209) 4.1546e-05 TDB period 1490.036182253556 4.08 6.6057e-06 1.809e-08 d yr n .2416048712693204 1.0711e-09 deg/d Q 3.039320845586822 8.9828e-09 au   Orbit Determination Parameters    # obs. used (total)      3218      data-arc span      40253 days (110.21 yr)      first obs. used      1910-03-30      last obs. used      2020-06-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43845      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:56:32   Additional Information  Earth MOID = 1.07037 au   Jupiter MOID = 1.92694 au   T_jup = 3.407  [ 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 12.3   n/a MPO267723   diameter diameter 8.175 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 11.91 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Ferrero, A. (2016) Minor Planet Bull. 43, 320-321.] geometric albedo albedo 0.290   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   SMASSII spectral type spec_B S   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) 3861 Lorenz (A910 FA)          Discovered 1910-Mar-30 by Helffrich, J. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A910 FA = 1951 GM = 1963 DK = 1971 CD = 1981 SP4 = 1986 WL  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 16:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin