+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2412961386170409 5.1357e-08   a 3.108121334824844 1.8227e-08 au q 2.358143658378367 1.6214e-07 au i 2.318977215247254 5.1908e-06 deg node 72.34370826617997 0.00015258 deg peri 258.9265325720823 0.00015299 deg M 299.6313624802097 1.294e-05 deg tp 2459536.124956686058 (2021-Nov-17.62495669) 7.3464e-05 TDB period 2001.452896255469 5.48 1.7606e-05 4.82e-08 d yr n .1798693342588908 1.5822e-09 deg/d Q 3.858099011271322 2.2625e-08 au   Orbit Determination Parameters    # obs. used (total)      466      data-arc span      9372 days (25.66 yr)      first obs. used      1994-09-27      last obs. used      2020-05-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .586      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:07:11   Additional Information  Earth MOID = 1.34699 au   Jupiter MOID = 1.52186 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 15.52   n/a E2021B55   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 ] 2021-Mar-09 05:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin