+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   79 Eurynome (A863 RA) Classification: Main-belt Asteroid          SPK-ID: 2000079 [ 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 110 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1899579238168014 3.364e-08   a 2.444635922715434 3.7126e-09 au q 1.98025795834844 8.2092e-08 au i 4.612512692301547 4.0319e-06 deg node 206.5336160177101 5.3222e-05 deg peri 201.5110121705285 5.4491e-05 deg M 331.5056008233358 1.3104e-05 deg tp 2459111.003673074305 (2020-Sep-18.50367307) 5.0909e-05 TDB period 1396.1102341589 3.82 3.1804e-06 8.707e-09 d yr n .2578592944824915 5.8741e-10 deg/d Q 2.909013887082429 4.4179e-09 au   Orbit Determination Parameters    # obs. used (total)      2761      data-arc span      57036 days (156.16 yr)      first obs. used      1863-10-05      last obs. used      2019-12-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47538      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 15:16:41   Additional Information  Earth MOID = .990903 au   Jupiter MOID = 2.478 au   T_jup = 3.470  [ show covariance matrix ] [ 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 8.0   n/a MPO492749 IRAS observations used: 12 magnitude slope G 0.25   n/a PDS3 (MPC 17257) Fit diameter diameter 63.479 km 0.952 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.978 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Scaltriti, F.; Zappala, V. (1976) Astron. Astrophys. Suppl. Ser. 23, 167-179.] [Schober, H.J. (1976) Icarus 28, 415-420.] [Michalowski, T.; Velichko, F.P. (1990) Acta Astronomica 40, 321-332.] [De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.] [De Angelis, G.; Mottola, S. (1995) Planet. Space Sci. 43, 1013-1017.] [Michalowski, T. (1996) Icarus 123, 456-462.] [Shevchenko, V.G.; Chiorny, V.G.; Kalashnikov, A.V.; Krugly, Yu.N.; et al. (1996) Astron. Astrophys. Suppl. Ser. 115, 475-479.] [Szabo, Gy.; Sarneczky, K.; Kiss, L.L. (1999) in Proc. IAU Coll. 173, Evolution and Source Regions of Asteroids and Comets, 185-188.] [Torppa, J.; Hentunen, V.-P.; Paakkonen, P.; Kehusmaa, P.; Muinonen, K. (2008) Icarus 198, 91-107.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.287   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.874   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=17.34, mean=20.18, max.=23.85) deg. U-B UB 0.421   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=17.34, mean=20.70, max.=23.85) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 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) 79 Eurynome (A863 RA)          Discovered 1863-Sep-14 by Watson, J. C. at Ann Arbor Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-06 11:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin