+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4006 Sandler (1972 YR) Classification: Main-belt Asteroid          SPK-ID: 2004006 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1836878102916543 2.7477e-08   a 2.514893413931939 7.5781e-09 au q 2.052938149609878 7.0881e-08 au i 2.391561253061751 4.4677e-06 deg node 293.7018628438278 6.5219e-05 deg peri 124.2410711557241 6.6742e-05 deg M 350.8660877954934 1.3778e-05 deg tp 2459037.460014612171 (2020-Jul-06.96001461) 5.5764e-05 TDB period 1456.72576684247 3.99 6.5843e-06 1.803e-08 d yr n .2471295615099326 1.117e-09 deg/d Q 2.976848678254 8.9701e-09 au   Orbit Determination Parameters    # obs. used (total)      2911      data-arc span      20400 days (55.85 yr)      first obs. used      1965-01-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43693      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:15:12   Additional Information  Earth MOID = 1.06633 au   Jupiter MOID = 2.36618 au   T_jup = 3.435  [ 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 12.7   n/a MPO452220   diameter diameter 15.894 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 3.40 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Vonk, M.T.; Kopchinski, D.J.; Pittman, A.R.; Tauble, S. (2006) Minor Planet Bull. 33, 1.] geometric albedo albedo 0.071   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4006 Sandler (1972 YR)          Discovered 1972-Dec-29 by Smirnova, T. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1972 YR = 1965 AW = 1969 AS = 1971 OO = 1973 AA1 = 1975 NC1 = 1979 OA14 = 1979 QH10 = 1981 AN1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-24 13:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin