+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266086 (2006 SA21) Classification: Main-belt Asteroid          SPK-ID: 2266086 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1294670898234765 4.3155e-08   a 2.234924825817643 1.1514e-08 au q 1.945575612644792 9.487e-08 au i 2.359444392408246 4.4307e-06 deg node 157.0774760035376 0.00011888 deg peri 256.3995998870732 0.00012062 deg M 48.29222810574688 2.0887e-05 deg tp 2459036.792887257374 (2020-Jul-06.29288726) 7.0185e-05 TDB period 1220.373606665959 3.34 9.4308e-06 2.582e-08 d yr n .294991630459392 2.2796e-09 deg/d Q 2.524274038990493 1.3005e-08 au   Orbit Determination Parameters    # obs. used (total)      250      data-arc span      6245 days (17.10 yr)      first obs. used      2003-12-14      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59098      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 23:11:41   Additional Information  Earth MOID = .957455 au   Jupiter MOID = 2.79223 au   T_jup = 3.627  [ 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 17.6   n/a MPO440309   266086 (2006 SA21)          Discovered 2006-Sep-16 by LONEOS at Anderson Mesa Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ 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 2083-Jan-14 05:29 00:09 Thisb 0.022886392835276 0.022867852986574 0.0229049366837316 3.47370403192431 3.4737039461604 2481873.728186465 8.90389560413491 1040.12143376471 52.7742210650984 27.3730902229813 29947.5337738594 T 13 CATAB v2.0f-lin.ifort 2021-Feb-23 23:11:43 2021-Feb-23 23:11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-24 18:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin