+ 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 173 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07226357123645114 2.7714e-08   a 3.109514977741711 7.1355e-09 au q 2.884810320636861 8.5373e-08 au i 6.547933486070919 2.998e-06 deg node 183.5526297742236 2.7844e-05 deg peri 252.841494009943 3.5803e-05 deg M 141.5085456381548 2.2904e-05 deg tp 2458213.241110677367 (2018-Apr-04.74111068) 0.0001271 TDB period 2002.799186989393 5.48 6.8939e-06 1.887e-08 d yr n .1797484252733056 6.1871e-10 deg/d Q 3.334219634846561 7.6512e-09 au   Orbit Determination Parameters    # obs. used (total)      3383      data-arc span      58662 days (160.61 yr)      first obs. used      1860-02-27      last obs. used      2020-10-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49952      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:34:00   Additional Information  Earth MOID = 1.90855 au   Jupiter MOID = 1.88457 au   T_jup = 3.205  [ hide covariance matrix ] Orbital Elements at Epoch 2453923.5 (2006-Jul-07.0) TDB Reference: JPL 173 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07483032824657873 2.7616e-08   q 2.877261785307653 8.5452e-08 au tp 2454233.380557916114 (2007-May-12.88055792) 0.00012359 TDB node 183.7562806909892 2.7775e-05 deg peri 257.6624379105641 3.5266e-05 deg i 6.55421139829541 3.0027e-06 deg   Orbit Determination Parameters    # obs. used (total)      3383      data-arc span      58662 days (160.61 yr)      first obs. used      1860-02-27      last obs. used      2020-10-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49952      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:34:00   Additional Information  Jupiter MOID = 1.88457 au   T_jup = 3.205  Orbit Covariance (6×6)   e q tp node peri i e 7.626589579084434E-16 -2.352496276964109E-15 1.374428097351267E-13 1.906787865478661E-15 3.040396835705441E-14 4.995052454757956E-16 q -2.352496276964109E-15 7.30199857528263E-15 -5.673488479369085E-13 -5.240326775173502E-15 -1.217004021064673E-13 -1.442417359741983E-15 tp 1.374428097351267E-13 -5.673488479369085E-13 1.527337461178905E-8 -7.754217748681194E-12 2.701860369101985E-9 1.457417823620787E-12 node 1.906787865478661E-15 -5.240326775173502E-15 -7.754217748681194E-12 7.714720743422657E-10 -7.673436053496504E-10 -6.734912721831407E-12 peri 3.040396835705441E-14 -1.217004021064673E-13 2.701860369101985E-9 -7.673436053496504E-10 1.243685571488373E-9 6.968779657559304E-12 i 4.995052454757956E-16 -1.442417359741983E-15 1.457417823620787E-12 -6.734912721831407E-12 6.968779657559304E-12 9.016353805494408E-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. 2020-October); 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.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] 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 ] 2021-Jan-24 23:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin