+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4834 Thoas (1989 AM2) Classification: Jupiter Trojan          SPK-ID: 2004834 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1374671584358007 3.4048e-08   a 5.210174311912437 9.4591e-08 au q 4.493946454298631 2.1775e-07 au i 28.46099020076097 1.938e-06 deg node 76.0077681896468 5.1466e-06 deg peri 352.1889802511509 1.5832e-05 deg M 292.6994619085101 2.0483e-05 deg tp 2460012.568832944336 (2023-Mar-09.06883294) 0.00026168 TDB period 4343.869873113656 11.89 0.0001183 3.239e-07 d yr n .08287541075487018 2.2569e-09 deg/d Q 5.926402169526242 1.0759e-07 au   Orbit Determination Parameters    # obs. used (total)      1803      data-arc span      12453 days (34.09 yr)      first obs. used      1986-12-02      last obs. used      2021-01-05      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48041      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:50:08   Additional Information  Earth MOID = 3.50986 au   Jupiter MOID = .580631 au   T_jup = 2.741  [ 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 9.23   n/a E2021B10   diameter diameter 72.331 km 0.460 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 18.192 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bull. 38, 116-120.] [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] [Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 15-22.] [Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.] geometric albedo albedo 0.085   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   4834 Thoas (1989 AM2)          Discovered 1989-Jan-11 by Shoemaker, C. S. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1989 AM2 = 1975 XX3 = 1986 XN = 1987 WP2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-13 13:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin