+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249813 (2001 DB100) Classification: Main-belt Asteroid          SPK-ID: 2249813 [ 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 .1773192105147866 3.8337e-08   a 2.393873426145364 1.1554e-08 au q 1.969393680148941 8.9641e-08 au i 4.188291283104307 4.0574e-06 deg node 264.2881804113749 6.8249e-05 deg peri 235.3463147426141 6.9949e-05 deg M 86.31759787800745 1.6532e-05 deg tp 2458676.125244640629 (2019-Jul-11.62524464) 6.0696e-05 TDB period 1352.851733599116 3.70 9.7943e-06 2.682e-08 d yr n .2661045486797426 1.9265e-09 deg/d Q 2.818353172141788 1.3603e-08 au   Orbit Determination Parameters    # obs. used (total)      418      data-arc span      7143 days (19.56 yr)      first obs. used      2000-12-23      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59289      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 00:15:03   Additional Information  Earth MOID = .986318 au   Jupiter MOID = 2.22862 au   T_jup = 3.505  [ 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 16.7   n/a MPO422970   diameter diameter 2.946 km 0.580 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.051   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249813 (2001 DB100)          Discovered 2001-Feb-17 by NEAT at Haleakala Reference: 20100923/Numbers.arc Last Updated: 2010-09-27 [ 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 1954-Feb-09 05:31 < 00:01 Iris 0.0307620371808533 0.030760382549684 0.0307636918567452 5.93967997252262 5.93967994106 2434782.729888701 0.749507741675716 438.22991107148 81.7258909099159 -88.5094763109557 56276.0497576722 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:15:04 2020-Nov-12 00:15 1954-Jun-11 19:45 00:02 Psych 0.036793125340818 0.036789302963636 0.0367969489100176 4.25515511986305 4.25515504258234 2434905.323079218 1.64125926019857 397.397503083945 61.7360010240624 62.6804806371196 79402.1106339156 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:15:04 2020-Nov-12 00:15 2054-May-26 02:33 00:01 Psych 0.0496556934620885 0.0496541962857538 0.0496571910341568 4.38686743841465 4.38686738287161 2471413.606132709 1.28351690604927 392.326129880063 61.1209027828851 -83.6552915884782 120717.931078274 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 00:15:04 2020-Nov-12 00:15 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 04:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin