+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5023 Agapenor (1985 TG3) Classification: Jupiter Trojan          SPK-ID: 2005023 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05299977161709396 5.0546e-08   a 5.167312400480161 9.214e-08 au q 4.893446023380535 3.1799e-07 au i 11.78979613516731 6.4792e-06 deg node 308.3348782753794 2.2763e-05 deg peri 85.9409607474085 6.5024e-05 deg M 309.7297149408703 6.2421e-05 deg tp 2459599.606941829398 (2022-Jan-20.10694183) 0.00074726 TDB period 4290.377482540521 11.75 0.00011475 3.142e-07 d yr n .08390870068309893 2.2443e-09 deg/d Q 5.441178777579787 9.7023e-08 au   Orbit Determination Parameters    # obs. used (total)      1464      data-arc span      12740 days (34.88 yr)      first obs. used      1985-09-16      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46662      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 23:22:40   Additional Information  Earth MOID = 3.92538 au   Jupiter MOID = .0465858 au   T_jup = 2.955  [ 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 10.4   n/a MPO302094   diameter diameter 27.850 km 3.511 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (https://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 5.4020 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] geometric albedo albedo 0.173   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (https://adsabs.harvard.edu/abs/2012ApJ...759...49G)   5023 Agapenor (1985 TG3)          Discovered 1985-Oct-11 by Shoemaker, C. S. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-17 12:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin