+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   603 Timandra (A906 DG) Classification: Main-belt Asteroid          SPK-ID: 2000603 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1737626590896115 3.0502e-08   a 2.538248959106794 8.5443e-09 au q 2.097196070540959 7.5993e-08 au i 8.024786594654014 3.6434e-06 deg node 343.4411876314228 3.0501e-05 deg peri 159.7669807626406 3.3444e-05 deg M 68.34394046957303 1.479e-05 deg tp 2458720.087566532591 (2019-Aug-24.58756653) 6.0582e-05 TDB period 1477.065491902825 4.04 7.4582e-06 2.042e-08 d yr n .243726498231457 1.2307e-09 deg/d Q 2.979301847672629 1.0029e-08 au   Orbit Determination Parameters    # obs. used (total)      2536      data-arc span      41841 days (114.55 yr)      first obs. used      1906-02-17      last obs. used      2020-09-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .36276      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:27:49   Additional Information  Earth MOID = 1.11129 au   Jupiter MOID = 2.03574 au   T_jup = 3.412  [ 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 11.9   n/a MPO384749   diameter diameter 13.73 km 0.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 rotation period rot_per 41.79 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F. (2011) Minor Planet Bull. 38, 76-78.] geometric albedo albedo 0.1354   0.019 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 603 Timandra (A906 DG)          Discovered 1906-Feb-16 by Metcalf, J. H. at Taunton 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 1928-Jan-03 04:10 < 00:01 Ceres 0.0499139737918441 0.0499084994814527 0.0499194487270294 4.07368918412524 4.0736871064305 2425248.673282288 0.782247959314944 388.305253484452 33.0095658819296 45.9976643760268 161951.013645953 T 34 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:55 2020-Nov-13 04:27 Alternate Designations  A906 DG = 1967 EJ = 1975 EA2 = 1977 RW7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 23:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin