+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3376 Armandhammer (1982 UJ8) Classification: Main-belt Asteroid          SPK-ID: 2003376 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06591007710337553 3.8522e-08   a 2.348632140323322 7.4157e-09 au q 2.193833614867146 9.2837e-08 au i 6.347540812926223 3.4872e-06 deg node 250.0627061557428 3.7518e-05 deg peri 328.6122639816293 4.8049e-05 deg M 330.2910264315165 3.0753e-05 deg tp 2459108.994087914512 (2020-Sep-16.49408791) 0.00011242 TDB period 1314.682634833892 3.60 6.2266e-06 1.705e-08 d yr n .2738303454091682 1.2969e-09 deg/d Q 2.503430665779498 7.9045e-09 au   Orbit Determination Parameters    # obs. used (total)      2508      data-arc span      24425 days (66.87 yr)      first obs. used      1953-09-16      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40355      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 23:03:01   Additional Information  Earth MOID = 1.18762 au   Jupiter MOID = 2.48494 au   T_jup = 3.548  [ 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 12.5   n/a MPO502185   diameter diameter 7.894 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.916 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2009) http://www.asu.cas.cz/~ppravec/neo.htm] [Stephens, R.D. (2016) Minor Planet Bull. 43, 252-255.] geometric albedo albedo 0.212   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B Sq   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) 3376 Armandhammer (1982 UJ8)          Discovered 1982-Oct-21 by Zhuravleva, L. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1982 UJ8 = 1952 HP3 = 1975 XF1 = 1978 PJ4 = 1978 SZ1 = 1982 TN  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-01 16:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin