+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   462 Eriphyla (A900 UJ) Classification: Main-belt Asteroid          SPK-ID: 2000462 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08836071775143639 4.2988e-08   a 2.872044774355798 1.0361e-08 au q 2.618268836679458 1.2473e-07 au i 3.1927103353188 3.6055e-06 deg node 105.2764505779072 8.5503e-05 deg peri 250.9705307026917 8.8399e-05 deg M 265.1463536894296 2.4481e-05 deg tp 2459668.921441012039 (2022-Mar-30.42144101) 0.00012165 TDB period 1777.80955528266 4.87 9.6205e-06 2.634e-08 d yr n .2024963804082842 1.0958e-09 deg/d Q 3.125820712032139 1.1277e-08 au   Orbit Determination Parameters    # obs. used (total)      3104      data-arc span      43783 days (119.87 yr)      first obs. used      1900-10-23      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44068      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:29:19   Additional Information  Earth MOID = 1.61409 au   Jupiter MOID = 2.26803 au   T_jup = 3.289  [ 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 9.41   n/a E2021B10 IRAS observations used: 8 diameter diameter 34.274 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.659 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Slivan, S.M.; Binzel, R.P.; Kaasalianen, M.; Hock, A.N.; et al. (2009) Icarus 200, 514-530.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] geometric albedo albedo 0.259   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.834   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.13, mean=10.58, max.=15.66) deg. U-B UB 0.421   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.13, mean=9.81, max.=15.66) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 462 Eriphyla (A900 UJ)          Discovered 1900-Oct-22 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A900 UJ = 1927 CP = 1946 DB = 1948 OG = 1951 EA3 = 1957 KB = 1958 RR = 1959 WB = A896 YA = A907 BB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-08 13:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin