+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08829445809157015 4.3051e-08   a 2.871683449507095 1.0475e-08 au q 2.618129715522335 1.2472e-07 au i 3.192706785683598 3.6101e-06 deg node 105.2764338703879 8.5591e-05 deg peri 251.0849067206759 8.8484e-05 deg M 224.5120012884297 2.4412e-05 deg tp 2459669.462235905987 (2022-Mar-30.96223591) 0.00012162 TDB period 1777.474073100981 4.87 9.7252e-06 2.663e-08 d yr n .2025345997716546 1.1081e-09 deg/d Q 3.125237183491854 1.1399e-08 au   Orbit Determination Parameters    # obs. used (total)      3081      data-arc span      43749 days (119.78 yr)      first obs. used      1900-10-23      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44218      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:16:33   Additional Information  Earth MOID = 1.61569 au   Jupiter MOID = 2.2694 au   T_jup = 3.290  [ 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 9.4   n/a MPO473767 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. 2019-August); 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.] 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 ] 2020-Oct-26 07:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin