+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173692 (2001 PS20) Classification: Main-belt Asteroid          SPK-ID: 2173692 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1696598562027621 4.2297e-08   a 2.808486883721174 1.3809e-08 au q 2.331999402881696 1.1912e-07 au i 9.981636856901643 4.5313e-06 deg node 63.83289033486508 2.9636e-05 deg peri 256.6078018008282 3.4051e-05 deg M 359.6889750031364 1.5459e-05 deg tp 2459001.985250887034 (2020-Jun-01.48525089) 7.382e-05 TDB period 1719.123301098087 4.71 1.2679e-05 3.471e-08 d yr n .2094090631952057 1.5444e-09 deg/d Q 3.284974364560652 1.6152e-08 au   Orbit Determination Parameters    # obs. used (total)      560      data-arc span      7508 days (20.56 yr)      first obs. used      2000-04-27      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54684      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:26:15   Additional Information  Earth MOID = 1.34385 au   Jupiter MOID = 2.08645 au   T_jup = 3.279  [ hide covariance matrix ] Orbital Elements at Epoch 2457835.5 (2017-Mar-23.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1700833239241374 4.2395e-08   q 2.329876608159709 1.1967e-07 au tp 2457286.129613235218 (2015-Sep-20.62961324) 7.5824e-05 TDB node 63.84792700299475 2.9611e-05 deg peri 257.1318680285157 3.3996e-05 deg i 9.987716542597783 4.5362e-06 deg   Orbit Determination Parameters    # obs. used (total)      560      data-arc span      7508 days (20.56 yr)      first obs. used      2000-04-27      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54684      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:26:15   Additional Information  Jupiter MOID = 2.08645 au   T_jup = 3.279  Orbit Covariance (6×6)   e q tp node peri i e 1.797338345632329E-15 -5.050208957508701E-15 1.645157584290785E-12 1.403637278737896E-14 3.689840640835241E-13 -1.048629713300978E-14 q -5.050208957508701E-15 1.432151752181015E-14 -4.853351774087821E-12 -4.1217032565255E-14 -1.076683233711002E-12 2.996930421418798E-14 tp 1.645157584290785E-12 -4.853351774087821E-12 5.74921084574355E-9 3.502371066110911E-11 1.301082592708172E-9 -1.741579872988213E-11 node 1.403637278737896E-14 -4.1217032565255E-14 3.502371066110911E-11 8.768230169903323E-10 -8.553887676959054E-10 -5.744734290521665E-11 peri 3.689840640835241E-13 -1.076683233711002E-12 1.301082592708172E-9 -8.553887676959054E-10 1.15575713722362E-9 5.258163643642278E-11 i -1.048629713300978E-14 2.996930421418798E-14 -1.741579872988213E-11 -5.744734290521665E-11 5.258163643642278E-11 2.057679593491753E-11 [ 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 15.3   n/a MPO436862   173692 (2001 PS20)          Discovered 2001-Aug-10 by NEAT at Palomar Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ show close-approach data ] Alternate Designations  2001 PS20 = 2005 JC28  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 02:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin