+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   52 Europa (A858 CA) Classification: Main-belt Asteroid          SPK-ID: 2000052 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 102 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .110441968518672 2.7492e-08   a 3.094249386944294 6.4924e-09 au q 2.752514393562472 8.5014e-08 au i 7.478465148069584 2.8168e-06 deg node 128.6006923568405 2.2073e-05 deg peri 343.3664555839664 2.5384e-05 deg M 309.8657102891241 1.273e-05 deg tp 2459277.362261994788 (2021-Mar-03.86226199) 7.0623e-05 TDB period 1988.06874282896 5.44 6.2571e-06 1.713e-08 d yr n .1810802575607779 5.6992e-10 deg/d Q 3.435984380326115 7.2095e-09 au   Orbit Determination Parameters    # obs. used (total)      3281      data-arc span      58555 days (160.31 yr)      first obs. used      1860-07-09      last obs. used      2020-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51178      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:50:41   Additional Information  Earth MOID = 1.77 au   Jupiter MOID = 1.65974 au   T_jup = 3.201  [ hide covariance matrix ] Orbital Elements at Epoch 2452338.5 (2002-Mar-05.0) TDB Reference: JPL 102 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1013207092417899 2.7359e-08   q 2.786127878547898 8.3545e-08 au tp 2453304.847348325136 (2004-Oct-26.34734832) 7.4222e-05 TDB node 129.0226587956484 2.2079e-05 deg peri 342.710535130374 2.6026e-05 deg i 7.46850703717252 2.8121e-06 deg   Orbit Determination Parameters    # obs. used (total)      3281      data-arc span      58555 days (160.31 yr)      first obs. used      1860-07-09      last obs. used      2020-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51178      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:50:41   Additional Information  Jupiter MOID = 1.65974 au   T_jup = 3.201  Orbit Covariance (6×6)   e q tp node peri i e 7.484890085482283E-16 -2.279526173793358E-15 -2.778952930168569E-13 -4.054960750087608E-15 -3.973346376835168E-14 -5.385141930448678E-16 q -2.279526173793358E-15 6.979690408468678E-15 8.629155591468815E-13 1.082210205382769E-14 1.204831228056271E-13 1.665984609453736E-15 tp -2.778952930168569E-13 8.629155591468815E-13 5.50886735146208E-9 3.570366829347893E-12 1.033998635851798E-9 9.033118540667525E-13 node -4.054960750087608E-15 1.082210205382769E-14 3.570366829347893E-12 4.874906890534845E-10 -4.823063404117139E-10 -1.100026515252081E-11 peri -3.973346376835168E-14 1.204831228056271E-13 1.033998635851798E-9 -4.823063404117139E-10 6.773763851502588E-10 1.105532231005422E-11 i -5.385141930448678E-16 1.665984609453736E-15 9.033118540667525E-13 -1.100026515252081E-11 1.105532231005422E-11 7.908114458738283E-12 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.4   n/a MPO492748 IRAS observations used: 19 magnitude slope G 0.18   n/a PDS3 (MPC 17257) Fit diameter diameter 303.918 km 3.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 5.6304 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Zappala, V.; Di Martino, M.; Cacciatori, S. (1983) Icarus 56, 319-324.] [Michalowski, T.; Velichko, F.P.; Di Martino, M.; Krugly, et al. (1995) Icarus 118, 292-301.] [Lopez-Gonzalez, M.J.; Rodriguez, E. (1999) Astron. Astrophys. Suppl. Ser. 139, 565-574.] [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.] [Michalowski, T.; Kwiatkowski, T.; Pych, W.; Kryszczynska, A.; et al. (2004) Astron. Astrophys. 416, 353-366.] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.] [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] geometric albedo albedo 0.057   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.679   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=3.33, mean=11.85, max.=20.86) deg. U-B UB 0.338   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.33, mean=12.40, max.=20.86) deg. Tholen spectral type spec_T CF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B C   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) 52 Europa (A858 CA)          Discovered 1858-Feb-04 by Goldschmidt, H. at Paris Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A858 CA = 1948 LA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 19:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin