+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   929 Algunde (A920 ED) Classification: Main-belt Asteroid          SPK-ID: 2000929 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1130525322525201 3.1115e-08   a 2.238986761359235 5.3992e-09 au q 1.985863638307705 6.961e-08 au i 3.912828889307808 3.4698e-06 deg node 231.3822955659559 5.5935e-05 deg peri 22.9902151306204 5.9034e-05 deg M 249.2494470325285 2.0412e-05 deg tp 2459376.960242748846 (2021-Jun-11.46024275) 6.9701e-05 TDB period 1223.702128416368 3.35 4.4263e-06 1.212e-08 d yr n .2941892406985411 1.0641e-09 deg/d Q 2.492109884410766 6.0096e-09 au   Orbit Determination Parameters    # obs. used (total)      3042      data-arc span      36564 days (100.11 yr)      first obs. used      1920-03-10      last obs. used      2020-04-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44573      source      ORB      producer      Otto Matic      solution date      2020-May-20 01:15:39   Additional Information  Earth MOID = .971963 au   Jupiter MOID = 2.53688 au   T_jup = 3.624  [ 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 11.7   n/a MPO502161   diameter diameter 11.443 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 3.31016 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Galad, A.; Kornos, L. (2008) Minor Planet Bull. 35, 78-81.] [Oey, J. (2008) Minor Planet Bull. 35, 132-135.] [Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm] [Klinglesmith III, D.A.; Hendrickx, S.; Madden, K.; Montgomery, S. (2016) Minor Planet Bull. 43, 123-128.] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Franco, L.; Marchini, A.; Baj, G.; Scarfi, G.; et al. (2019) Minor Planet Bull. 46, 85-86.] geometric albedo albedo 0.272   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   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) 929 Algunde (A920 ED)          Discovered 1920-Mar-10 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1958-May-11 18:08 < 00:01 Iris 0.0446992068820688 0.0446984191416795 0.044699994688163 6.66602820976858 6.6660281904753 2436335.255745272 0.167725041285217 155.649050961295 32.3442496251941 -81.5866290491611 204570.681900461 T 43 CATAB v2.0f-lin.ifort 2020-May-20 01:15:51 2020-May-20 01:15 2117-Jun-13 12:25 < 00:01 Hebe 0.0405187340828425 0.0405155203681689 0.0405219485260099 7.5816222743998 7.58162225416311 2494442.017099997 0.368526957826357 319.145316117883 30.7209209826628 -60.3233436230106 171653.407252337 T 43 CATAB v2.0f-lin.ifort 2020-May-20 01:15:51 2020-May-20 01:15 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-03 15:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin