+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   48 Doris (A857 SA) Classification: Main-belt Asteroid          SPK-ID: 2000048 [ 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 172 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07226357103488794 2.7737e-08   a 3.109514977798657 7.1505e-09 au q 2.884810321316456 8.5464e-08 au i 6.547933444480069 3.0046e-06 deg node 183.5526301018463 2.7886e-05 deg peri 252.841493306156 3.5873e-05 deg M 141.50854594108 2.2939e-05 deg tp 2458213.241108970468 (2018-Apr-04.74110897) 0.00012731 TDB period 2002.79918704441 5.48 6.9083e-06 1.891e-08 d yr n .1797484252683678 6.2001e-10 deg/d Q 3.334219634280859 7.6672e-09 au   Orbit Determination Parameters    # obs. used (total)      3341      data-arc span      58597 days (160.43 yr)      first obs. used      1860-02-27      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50228      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:08:33   Additional Information  Earth MOID = 1.90855 au   Jupiter MOID = 1.88457 au   T_jup = 3.205  [ hide covariance matrix ] Orbital Elements at Epoch 2453893.5 (2006-Jun-07.0) TDB Reference: JPL 172 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07482756284267889 2.7647e-08   q 2.877196353597161 8.5576e-08 au tp 2454233.478138130220 (2007-May-12.97813813) 0.00012381 TDB node 183.7564402933012 2.7818e-05 deg peri 257.6831712526504 3.5331e-05 deg i 6.554299912426785 3.0094e-06 deg   Orbit Determination Parameters    # obs. used (total)      3341      data-arc span      58597 days (160.43 yr)      first obs. used      1860-02-27      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50228      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:08:33   Additional Information  Jupiter MOID = 1.88457 au   T_jup = 3.205  Orbit Covariance (6×6)   e q tp node peri i e 7.643691728374185E-16 -2.358523980347804E-15 1.471873708977597E-13 1.905851925686858E-15 3.232911042148262E-14 5.008658527354671E-16 q -2.358523980347804E-15 7.32321776238571E-15 -6.016398898752908E-13 -5.229055557400978E-15 -1.284761557511746E-13 -1.446379822681082E-15 tp 1.471873708977597E-13 -6.016398898752908E-13 1.532884726666004E-8 -7.989179855887579E-12 2.71314698898491E-9 1.48902890339301E-12 node 1.905851925686858E-15 -5.229055557400978E-15 -7.989179855887579E-12 7.738133953806176E-10 -7.69712203379891E-10 -7.041061744852041E-12 peri 3.232911042148262E-14 -1.284761557511746E-13 2.71314698898491E-9 -7.69712203379891E-10 1.248279384163846E-9 7.2787250649726E-12 i 5.008658527354671E-16 -1.446379822681082E-15 1.48902890339301E-12 -7.041061744852041E-12 7.2787250649726E-12 9.056347470516164E-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 7.1   n/a MPO473760 IRAS observations used: 10 diameter diameter 216.473 km 4.757 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.89 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.] [Debehogne, H.; Lagerkvist, C.-I.; Zappala, V. (1982) Astron. Astrophys. Suppl. Ser. 50, 277-281.] [Schober, H.J.; Schroll, A. (1982) Astron. Astrophys. 107, 402-405.] [Higgins, D.; Pilcher, F. (2009) Minor Planet Bull. 36, 143-144.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.] geometric albedo albedo 0.065   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.716   0.012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg. U-B UB 0.442   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg. Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 6 color indices SMASSII spectral type spec_B Ch   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) 48 Doris (A857 SA)          Discovered 1857-Sep-19 by Goldschmidt, H. at Paris Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A857 SA = 1948 FE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 02:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin