+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78410 (2002 QU21) Classification: Main-belt Asteroid          SPK-ID: 2078410 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05507194717347729 3.7289e-08   a 2.25414830370966 9.4819e-09 au q 2.130007967406578 8.4693e-08 au i 2.681912442802177 4.9199e-06 deg node 349.6998982132996 9.2562e-05 deg peri 308.7768722586788 0.00010432 deg M 117.4492074317831 4.7152e-05 deg tp 2458597.207872127690 (2019-Apr-23.70787213) 0.00016197 TDB period 1236.152794971888 3.38 7.7997e-06 2.135e-08 d yr n .2912261343939985 1.8375e-09 deg/d Q 2.378288640012742 1.0004e-08 au   Orbit Determination Parameters    # obs. used (total)      408      data-arc span      10276 days (28.13 yr)      first obs. used      1992-09-23      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56819      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:12:41   Additional Information  Earth MOID = 1.11555 au   Jupiter MOID = 2.71249 au   T_jup = 3.621  [ 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 16.9   n/a MPO449493   78410 (2002 QU21)          Discovered 2002-Aug-26 by NEAT at Palomar Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ 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 2179-Nov-22 06:15 00:03 Eunom 0.0432197923649149 0.0431887391655924 0.0432508456291628 4.9097337233564 4.90973365720284 2517248.760527924 2.85208014408854 1549.88683323437 43.7768902539062 -3.15172958261487 9117.45773779304 T 18 CATAB v2.0f-lin.ifort 2020-Dec-18 04:12:42 2020-Dec-18 04:12 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 01:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin