+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   80 Sappho (A864 JA) Classification: Main-belt Asteroid          SPK-ID: 2000080 [ 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 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .200313447602975 2.6501e-08   a 2.295291517163657 3.5439e-09 au q 1.835513760106741 6.0752e-08 au i 8.676073494107833 3.8351e-06 deg node 218.6882237184375 1.9873e-05 deg peri 139.6195215734011 2.2512e-05 deg M 210.6623846809241 1.1176e-05 deg tp 2459527.392377385085 (2021-Nov-08.89237738) 4.0036e-05 TDB period 1270.150560884182 3.48 2.9416e-06 8.054e-09 d yr n .283430965656068 6.5642e-10 deg/d Q 2.755069274220572 4.2538e-09 au   Orbit Determination Parameters    # obs. used (total)      2739      data-arc span      56547 days (154.82 yr)      first obs. used      1865-10-08      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50599      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:09:19   Additional Information  Earth MOID = .842636 au   Jupiter MOID = 2.73882 au   T_jup = 3.553  [ 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 MPO502153 IRAS observations used: 29 diameter diameter 68.563 km 1.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 14.030 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Debehogne, H.; Lagerkvist, C.-I.; Hahn, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 45-48.] [Michalowski, T. (1993) Icarus 106, 563-572.] [Durech, J. (2006) IAU 2006, poster paper.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Pilcher, F. (2010) Minor Planet Bull. 37, 148-149.] [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 0.206   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.901   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.56, mean=16.47, max.=25.92) deg. U-B UB 0.523   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.56, mean=18.69, max.=27.58) 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) 80 Sappho (A864 JA)          Discovered 1864-May-02 by Pogson, N. R. at Madras May 3 is date of first measurement. 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-Sep-29 17:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin