+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22222 Hodios (3156 T-2) Classification: Jupiter Trojan          SPK-ID: 2022222 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04453224647067366 4.8547e-08   a 5.072111864640111 9.9516e-08 au q 4.84623932895713 3.1645e-07 au i 2.402697830600511 5.096e-06 deg node 48.85833742210841 0.00013685 deg peri 25.41195763413575 0.00015802 deg M 295.9528967630453 8.0973e-05 deg tp 2459942.798619718256 (2022-Dec-29.29861972) 0.00094891 TDB period 4172.35892948838 11.42 0.00012279 3.362e-07 d yr n .08628212627050848 2.5393e-09 deg/d Q 5.297984400323092 1.0395e-07 au   Orbit Determination Parameters    # obs. used (total)      757      data-arc span      17259 days (47.25 yr)      first obs. used      1973-09-25      last obs. used      2020-12-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53682      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:02:39   Additional Information  Earth MOID = 3.86085 au   Jupiter MOID = .00538057 au   T_jup = 2.997  [ 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 12.4   n/a MPO452483   22222 Hodios           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. The Greek herald Hodios went together with the other Greek herald Eurybates and Odysseus and Phoenix to Achilles to persuade Achilles to stop his quarrel with Agamemnon and fight the Trojans again. 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  3156 T-2 = 1998 SJ146  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 01:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin