+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2073253993837716 4.3315e-08   a 3.158293744989201 1.9177e-08 au q 2.503499232938047 1.3924e-07 au i 27.04348097312464 5.4816e-06 deg node 187.7009892024535 9.5559e-06 deg peri 57.23454157843782 1.5735e-05 deg M 284.2772976349447 1.2257e-05 deg tp 2459631.721902110193 (2022-Feb-21.22190211) 7.1555e-05 TDB period 2050.11020355911 5.61 1.8673e-05 5.112e-08 d yr n .1756003162049626 1.5994e-09 deg/d Q 3.813088257040355 2.3153e-08 au   Orbit Determination Parameters    # obs. used (total)      806      data-arc span      18191 days (49.80 yr)      first obs. used      1971-03-25      last obs. used      2021-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56925      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:33:33   Additional Information  Earth MOID = 1.58394 au   Jupiter MOID = 1.44245 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 ] 2021-Apr-12 20:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin