+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17327 (4155 T-1) Classification: Main-belt Asteroid          SPK-ID: 2017327 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04083423176851752 2.9234e-08   a 2.723077785788026 1.1434e-08 au q 2.611882996359456 8.0556e-08 au i 3.042018608236051 3.467e-06 deg node 72.32344519004614 9.051e-05 deg peri 19.71468804449023 0.00011195 deg M 110.3843626231705 6.4599e-05 deg tp 2458697.238681168952 (2019-Aug-01.73868117) 0.00029489 TDB period 1641.301996711873 4.49 1.0338e-05 2.83e-08 d yr n .2193380625388937 1.3815e-09 deg/d Q 2.834272575216596 1.1901e-08 au   Orbit Determination Parameters    # obs. used (total)      1734      data-arc span      18246 days (49.95 yr)      first obs. used      1971-03-24      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49646      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:01:29   Additional Information  Earth MOID = 1.62843 au   Jupiter MOID = 2.23143 au   T_jup = 3.354  [ 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 14.25   n/a E2021B10   diameter diameter 5.200 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.180   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17327 (4155 T-1)          Discovered 1971-Mar-26 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  4155 T-1 = 1996 WM2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 18:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin