+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22203 Prothoenor (6020 P-L) Classification: Jupiter Trojan          SPK-ID: 2022203 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1009036281817228 3.8692e-08   a 5.198544875252236 8.2452e-08 au q 4.673992836073784 2.1535e-07 au i 1.380556904483605 5.309e-06 deg node 189.4113302497421 0.00017112 deg peri 96.70747951566712 0.00017361 deg M 61.9503223846712 2.665e-05 deg tp 2458255.489844582924 (2018-May-16.98984458) 0.00032601 TDB period 4329.334305716397 11.85 0.000103 2.82e-07 d yr n .08315366164369904 1.9783e-09 deg/d Q 5.723096914430688 9.0771e-08 au   Orbit Determination Parameters    # obs. used (total)      1399      data-arc span      24261 days (66.42 yr)      first obs. used      1954-02-26      last obs. used      2020-07-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52514      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:50:48   Additional Information  Earth MOID = 3.65795 au   Jupiter MOID = .13679 au   T_jup = 2.989  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.6   n/a MPO337446   diameter diameter 24.605 km 1.229 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   geometric albedo albedo 0.073   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   22203 Prothoenor           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Prothoenor was also a hero from Boeotia in the fight against Troy, as were Klonios and Arkesilaos. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010705/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  6020 P-L = 1994 NL11 = 1996 TT68 = 1998 UV31  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-20 03:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin