+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1014 Semphyra (A924 BM) Classification: Main-belt Asteroid          SPK-ID: 2001014 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2027117269545883 3.5084e-08   a 2.801255486741747 8.9528e-09 au q 2.233408149383312 9.8721e-08 au i 2.264318341099359 3.0387e-06 deg node 251.5429724379464 9.2682e-05 deg peri 234.2985320852096 9.2897e-05 deg M 223.0549930290595 8.8067e-06 deg tp 2459851.935180608214 (2022-Sep-29.43518061) 4.3749e-05 TDB period 1712.487882590136 4.69 8.2097e-06 2.248e-08 d yr n .2102204655927261 1.0078e-09 deg/d Q 3.369102824100183 1.0768e-08 au   Orbit Determination Parameters    # obs. used (total)      2933      data-arc span      35407 days (96.94 yr)      first obs. used      1924-01-29      last obs. used      2021-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43825      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:51:45   Additional Information  Earth MOID = 1.24963 au   Jupiter MOID = 1.7146 au   T_jup = 3.293  [ hide covariance matrix ] Orbital Elements at Epoch 2456995.5 (2014-Dec-04.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1999442888947673 3.4504e-08   q 2.242681982696535 9.6651e-08 au tp 2456416.685294200235 (2013-May-04.18529420) 3.6721e-05 TDB node 251.7578338768898 9.2189e-05 deg peri 233.085436004035 9.2426e-05 deg i 2.268270808934077 3.0423e-06 deg   Orbit Determination Parameters    # obs. used (total)      2933      data-arc span      35407 days (96.94 yr)      first obs. used      1924-01-29      last obs. used      2021-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43825      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:51:45   Additional Information  Jupiter MOID = 1.7146 au   T_jup = 3.293  Orbit Covariance (6×6)   e q tp node peri i e 1.190557583596417E-15 -3.325996998536866E-15 8.539899057091646E-14 3.632606497593303E-16 2.333407084221719E-14 2.213640310415278E-16 q -3.325996998536866E-15 9.341384194729369E-15 -1.514991827225645E-13 -1.739380064373004E-15 -4.631717956146536E-14 -5.907204912224628E-16 tp 8.539899057091646E-14 -1.514991827225645E-13 1.348440360561685E-9 1.965319135290187E-13 2.643828333384828E-10 2.617246674210141E-13 node 3.632606497593303E-16 -1.739380064373004E-15 1.965319135290187E-13 8.498835810422239E-9 -8.492146697787366E-9 8.926779721419087E-11 peri 2.333407084221719E-14 -4.631717956146536E-14 2.643828333384828E-10 -8.492146697787366E-9 8.54264185429654E-9 -8.915507105657681E-11 i 2.213640310415278E-16 -5.907204912224628E-16 2.617246674210141E-13 8.926779721419087E-11 -8.915507105657681E-11 9.255678403679863E-12 [ 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 11.93   n/a E2021B10   diameter diameter 17.487 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.636 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pray, D. (2005) Minor Planet Bull. 32, 8-9.] geometric albedo albedo 0.083   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   SMASSII spectral type spec_B Xe   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) 1014 Semphyra (A924 BM)          Discovered 1924-Jan-29 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A924 BM = 1932 WH = 1984 YP6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 09:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin