+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   94 Aurora (A867 RA) Classification: Main-belt Asteroid          SPK-ID: 2000094 [ 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 103 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0942734878327464 2.9528e-08   a 3.157818067654637 1.1647e-08 au q 2.860119544475571 9.7168e-08 au i 7.969381177306825 3.4587e-06 deg node 2.565352398435638 2.5752e-05 deg peri 60.3431734415087 3.3272e-05 deg M 19.26394569238667 2.0917e-05 deg tp 2458890.821417428064 (2020-Feb-11.32141743) 0.00011893 TDB period 2049.647063815258 5.61 1.1339e-05 3.104e-08 d yr n .1756399949803495 9.7169e-10 deg/d Q 3.455516590833703 1.2745e-08 au   Orbit Determination Parameters    # obs. used (total)      4069      data-arc span      54166 days (148.30 yr)      first obs. used      1872-07-26      last obs. used      2020-11-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .37057      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:51:00   Additional Information  Earth MOID = 1.88319 au   Jupiter MOID = 1.87311 au   T_jup = 3.184  [ 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 7.6   n/a MPO502153 IRAS observations used: 16 diameter diameter 204.89 km 3.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 rotation period rot_per 7.22 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Marciniak, A.; Michalowski, T.; Polinska, M.; Bartczak, P.; et al. (2011) Astron. Astrophys. 529, A107.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.0395   0.001 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16 B-V BV 0.663   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.84, mean=9.35, max.=17.06) deg. U-B UB 0.301   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.84, mean=9.35, max.=17.06) deg. Tholen spectral type spec_T CP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B C   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) 94 Aurora (A867 RA)          Discovered 1867-Sep-06 by Watson, J. C. at Ann Arbor Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A867 RA = A912 TC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 13:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin