+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   7336 Saunders (1989 RS1) Classification: Amor [NEO]          SPK-ID: 2007336 [ 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 146 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4817050719244923 3.3664e-08   a 2.304880273500982 1.403e-09 au q 1.194607755576848 7.7739e-08 au i 7.197246574134468 4.5806e-06 deg node 174.4846160090812 1.7776e-05 deg peri 181.4679167493537 2.6322e-05 deg M 275.4450595045838 7.5735e-06 deg tp 2459300.697776240912 (2021-Mar-27.19777624) 2.6792e-05 TDB period 1278.118094738495 3.50 1.167e-06 3.195e-09 d yr n .2816641134195479 2.5717e-10 deg/d Q 3.415152791425116 2.0788e-09 au   Orbit Determination Parameters    # obs. used (total)      897      data-arc span      12871 days (35.24 yr)      first obs. used      1982-10-20      last obs. used      2018-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4492      source      ORB      producer      Otto Matic      solution date      2018-Jan-16 06:56:03   Additional Information  Earth MOID = .190276 au   Jupiter MOID = 2.03648 au   T_jup = 3.415  [ 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 18.8   n/a MPO179645   rotation period rot_per 4.307 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Warner, B.D. (2018) Minor Planet Bull. 45, 138-147.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.] 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) 7336 Saunders           Discovered 1989 Sept. 6 by E. F. Helin at Palomar. R. Stephen Saunders (b. 1940), chief scientist for the Solar System Exploration Office at the Jet Propulsion Laboratory, is the project scientist for the Mars Surveyor Program 2001/2003 mission, director of JPL's Regional Planetary Image Facility and former project scientist of the Magellan mission to Venus. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000726/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-01 23:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin