+ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1737626582300152 3.0597e-08   a 2.538248959273706 8.5511e-09 au q 2.097196072860737 7.6263e-08 au i 8.024786674592571 3.6598e-06 deg node 343.4411877037566 3.0502e-05 deg peri 159.7669806921122 3.3446e-05 deg M 68.34394033732818 1.4793e-05 deg tp 2458720.087567047527 (2019-Aug-24.58756705) 6.0597e-05 TDB period 1477.06549204852 4.04 7.4642e-06 2.044e-08 d yr n .2437264982074163 1.2316e-09 deg/d Q 2.979301845686674 1.0037e-08 au   Orbit Determination Parameters    # obs. used (total)      2500      data-arc span      41809 days (114.47 yr)      first obs. used      1906-02-17      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .36475      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:18:55   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. 2019-August); 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 33 CATAB v2.0f-lin.ifort 2020-Aug-24 22:19:07 2020-Aug-24 22:19 Alternate Designations  A906 DG = 1967 EJ = 1975 EA2 = 1977 RW7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-30 22:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin