+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   93 Minerva Classification: Main-belt Asteroid          SPK-ID: 2000093 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 78 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1413841658162178 4.6414e-08   a 2.755095968921847 8.1796e-09 AU q 2.365569023612207 1.2894e-07 AU i 8.559448379089163 5.6246e-06 deg node 4.081179685791472 2.9882e-05 deg peri 274.9526487225523 3.6393e-05 deg M 2.905491255777405 1.9305e-05 deg tp 2456387.019046960342 (2013-Apr-04.51904696) 8.9573e-05 JED period 1670.334778886955 4.57 7.4386e-06 2.037e-08 d yr n .2155256566230931 9.5981e-10 deg/d Q 3.144622914231486 9.3361e-09 AU   Orbit Determination Parameters    # obs. used (total)      1271      data-arc span      52271 days (143.11 yr)      first obs. used      1870-02-25      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .61733      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:32:14   Additional Information  Earth MOID = 1.36878 AU   T_jup = 3.313  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 7.70 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 diameter diameter 141.55 km 4.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 rotation period rot_per 5.982 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Debehogne, H.; Lagerkvist, C.-I.; Zappala, V. (1982) Astron. Astrophys. Suppl. Ser. 50, 277-281.] [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.] [Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.] [Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.] [Torppa, J.; Hentunen, V.-P.; Paakkonen, P.; Kehusmaa, P.; Muinonen, K. (2008) Icarus 198, 91-107.] [Marchis, F.; Descamps, P.; Dalba, P.; Enriquez, J.E.; et al. (2011) EPSC-DPS2011 #653-3.] geometric albedo albedo 0.0733   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 B-V BV .685 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=11; phase (min.=1.99, mean=14.12, max.=20.65) deg. U-B UB .315 mag .029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=8; phase (min.=1.99, mean=14.28, max.=23.05) deg. Tholen spectral type spec_T CU   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) 93 Minerva          Discovered 1867-Aug-24 by Watson, J. C. at Ann Arbor Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1949 QN2 = A902 DA  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 12:25 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin