+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100612 (1997 SL25) Classification: Main-belt Asteroid          SPK-ID: 2100612 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2003819728531642 2.963e-08   a 2.70015260031058 1.192e-08 au q 2.159090695255744 8.058e-08 au i 13.37297653842174 3.5915e-06 deg node 178.6956496379055 1.5434e-05 deg peri 175.9315066040046 1.867e-05 deg M 93.98044376391709 9.1111e-06 deg tp 2458777.426443560192 (2019-Oct-20.92644356) 4.0853e-05 TDB period 1620.618867271275 4.44 1.0732e-05 2.938e-08 d yr n .2221373620104472 1.471e-09 deg/d Q 3.241214505365415 1.4309e-08 au   Orbit Determination Parameters    # obs. used (total)      1077      data-arc span      9038 days (24.74 yr)      first obs. used      1996-05-14      last obs. used      2021-02-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49176      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:32:58   Additional Information  Earth MOID = 1.15318 au   Jupiter MOID = 2.21413 au   T_jup = 3.300  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9   n/a MPO449610   diameter diameter 2.830 km 0.662 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.242   0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100612 (1997 SL25)          Discovered 1997-Sep-29 by Shimizu, Y., Urata, T. at Nachi-Katsuura Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1997 SL25 = 2003 AT92  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 22:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin