+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100591 (1997 NW2) Classification: Main-belt Asteroid          SPK-ID: 2100591 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1026751466542298 4.3612e-08   a 3.025371152655854 2.6283e-08 au q 2.714740725873438 1.3756e-07 au i 7.558814185252264 5.0791e-06 deg node 287.7741547019446 4.3932e-05 deg peri 169.8062386568601 5.5218e-05 deg M 343.9196553807461 3.261e-05 deg tp 2459086.353750171959 (2020-Aug-24.85375017) 0.00017436 TDB period 1922.05769177971 5.26 2.5046e-05 6.857e-08 d yr n .1872992686638149 2.4407e-09 deg/d Q 3.33600157943827 2.8981e-08 au   Orbit Determination Parameters    # obs. used (total)      438      data-arc span      8242 days (22.57 yr)      first obs. used      1997-07-02      last obs. used      2020-01-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49395      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:08:12   Additional Information  Earth MOID = 1.73199 au   Jupiter MOID = 1.81743 au   T_jup = 3.224  [ 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 15.2   n/a MPO412741   diameter diameter 4.411 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.083   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100591 (1997 NW2)          Discovered 1997-Jul-02 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 NW2 = 2000 CF60  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-23 22:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin