+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8 Flora (A847 UA) Classification: Main-belt Asteroid          SPK-ID: 2000008 [ 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 119 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1558327923692447 2.3605e-08   a 2.201414664775942 2.2998e-09 au q 1.858362070401302 5.1684e-08 au i 5.88908062530565 3.2374e-06 deg node 110.8765242517159 2.4307e-05 deg peri 285.4589146930341 2.6624e-05 deg M 315.3180130254244 1.2045e-05 deg tp 2459148.574810849057 (2020-Oct-26.07481085) 4.0032e-05 TDB period 1193.029574445575 3.27 1.8695e-06 5.118e-09 d yr n .3017527877859182 4.7286e-10 deg/d Q 2.544467259150582 2.6582e-09 au   Orbit Determination Parameters    # obs. used (total)      2820      data-arc span      63092 days (172.74 yr)      first obs. used      1847-10-27      last obs. used      2020-07-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53892      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:34:24   Additional Information  Earth MOID = .87598 au   Jupiter MOID = 2.8706 au   T_jup = 3.642  [ hide covariance matrix ] Orbital Elements at Epoch 2451794.5 (2000-Sep-07.0) TDB Reference: JPL 119 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1562708871478529 2.3678e-08   q 1.857198666711328 5.1886e-08 au tp 2451989.598893291682 (2001-Mar-21.09889329) 3.586e-05 TDB node 111.0410267752242 2.4331e-05 deg peri 285.230406487157 2.6616e-05 deg i 5.886228137214599 3.2361e-06 deg   Orbit Determination Parameters    # obs. used (total)      2820      data-arc span      63092 days (172.74 yr)      first obs. used      1847-10-27      last obs. used      2020-07-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53892      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:34:24   Additional Information  Jupiter MOID = 2.8706 au   T_jup = 3.642  Orbit Covariance (6×6)   e q tp node peri i e 5.606462092517575E-16 -1.227747873863249E-15 2.205216145523023E-13 -2.305608741569756E-15 6.452336029752802E-14 -3.332961107407057E-16 q -1.227747873863249E-15 2.69210686324638E-15 -4.700173908399573E-13 4.793252736412348E-15 -1.375517068318275E-13 7.519028920621927E-16 tp 2.205216145523023E-13 -4.700173908399573E-13 1.285924834622281E-9 -7.182260595131419E-12 3.917332169718193E-10 -7.387585595214303E-13 node -2.305608741569756E-15 4.793252736412348E-15 -7.182260595131419E-12 5.919876240711841E-10 -5.905036668362495E-10 -3.963332914049541E-12 peri 6.452336029752802E-14 -1.375517068318275E-13 3.917332169718193E-10 -5.905036668362495E-10 7.084251114321863E-10 3.717693637457805E-12 i -3.332961107407057E-16 7.519028920621927E-16 -7.387585595214303E-13 -3.963332914049541E-12 3.717693637457805E-12 1.047261175224131E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.5   n/a MPO473760 IRAS observations used: 19 magnitude slope G 0.28   n/a PDS3 (MPC 17257) Fit diameter diameter 147.491 km 1.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 12.865 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Hollis, A.J.; Bembrick, C.S.; Dumont, M.; Miles, R. (1987) J. Brit. Astron. Assoc. 97, 220-223.] [Di Martino, M.; Zappala, V.; Cellino, A.; Barucci, M.A.; et al. (1989) Astron. Astrophys. 223, 352-360.] [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.] [Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.] [Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.] [Pilcher, F. (2009) Minor Planet Bull. 36, 133-136.] [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 0.226   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.885   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=8.07, mean=16.45, max.=32.13) deg. U-B UB 0.489   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=8.07, mean=17.27, max.=32.13) 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 8 Flora (A847 UA)          Discovered 1847-Oct-18 by Hind, J. R. at London Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 16:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin