+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1172 Aneas (1930 UA) Classification: Jupiter Trojan          SPK-ID: 2001172 [ 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 91 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1053622430042724 4.2755e-08   a 5.221817774284521 5.7247e-08 au q 4.671635341026326 2.5423e-07 au i 16.66200494188332 4.2991e-06 deg node 247.327318770212 1.5063e-05 deg peri 50.60962526403392 2.6729e-05 deg M 321.4638229800369 2.3727e-05 deg tp 2459667.048849348867 (2022-Mar-28.54884935) 0.00028895 TDB period 4358.439231753168 11.93 7.1673e-05 1.962e-07 d yr n .08259837544074032 1.3583e-09 deg/d Q 5.772000207542716 6.3279e-08 au   Orbit Determination Parameters    # obs. used (total)      2779      data-arc span      32989 days (90.32 yr)      first obs. used      1930-10-17      last obs. used      2021-02-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39519      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 12:05:45   Additional Information  Earth MOID = 3.68232 au   Jupiter MOID = .485013 au   T_jup = 2.905  [ 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 8.28   n/a E2021B10 IRAS observations used: 11 diameter diameter 118.020 km 0.806 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 8.705 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. (2015) Minor Planet Bull. 42, 216-224.] [Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.] [Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.059   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   B-V BV 0.725   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.69, mean=3.49, max.=4.87) deg. U-B UB 0.254   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=2.69, mean=4.41, max.=9.96) deg. Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 1172 Aneas (1930 UA)          Discovered 1930-Oct-17 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 18:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin