+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17321 (3188 T-1) Classification: Main-belt Asteroid          SPK-ID: 2017321 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .207425247851879 4.6467e-08   a 3.158521583554331 1.9782e-08 au q 2.503364461240064 1.4772e-07 au i 27.04115009401281 5.8919e-06 deg node 187.7101159237994 9.8383e-06 deg peri 57.20388277659752 1.6652e-05 deg M 249.1964321099755 1.244e-05 deg tp 2459631.566962269921 (2022-Feb-21.06696227) 7.3119e-05 TDB period 2050.332049259082 5.61 1.9262e-05 5.274e-08 d yr n .1755813162702555 1.6495e-09 deg/d Q 3.813678705868597 2.3885e-08 au   Orbit Determination Parameters    # obs. used (total)      776      data-arc span      17842 days (48.85 yr)      first obs. used      1971-03-25      last obs. used      2020-01-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56541      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 22:01:31   Additional Information  Earth MOID = 1.58471 au   Jupiter MOID = 1.44285 au   T_jup = 3.005  [ 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 14.2   n/a MPO425975   diameter diameter 7.954 km 0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17321 (3188 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  3188 T-1 = 1999 FE30  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-11 02:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin