+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100253 (1994 SB2) Classification: Main-belt Asteroid          SPK-ID: 2100253 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2411570848120329 5.3873e-08   a 3.107914169680611 1.8535e-08 au q 2.358418648674425 1.6913e-07 au i 2.318974723519385 5.2503e-06 deg node 72.34386499280771 0.00015695 deg peri 258.9353865008945 0.00015736 deg M 263.6301850206555 1.2779e-05 deg tp 2459536.223226823142 (2021-Nov-17.72322682) 7.3478e-05 TDB period 2001.252795781212 5.48 1.7902e-05 4.901e-08 d yr n .1798873189628548 1.6092e-09 deg/d Q 3.857409690686796 2.3004e-08 au   Orbit Determination Parameters    # obs. used (total)      447      data-arc span      9343 days (25.58 yr)      first obs. used      1994-09-27      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59164      source      ORB      producer      Otto Matic      solution date      2020-May-20 17:51:16   Additional Information  Earth MOID = 1.34918 au   Jupiter MOID = 1.52225 au   T_jup = 3.173  [ 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 15.4   n/a MPO432531   diameter diameter 3.365 km 0.918 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.108   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100253 (1994 SB2)          Discovered 1994-Sep-27 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1994 SB2 = 2004 JS17  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 03:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin