+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102 Miriam (A868 QA) Classification: Main-belt Asteroid          SPK-ID: 2000102 [ 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 91 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2511058587942517 2.8635e-08   a 2.662333494442398 5.1478e-09 au q 1.993805955923739 7.4373e-08 au i 5.172851659771833 3.0993e-06 deg node 210.7978638141702 3.3754e-05 deg peri 147.0245857798732 3.4407e-05 deg M 341.9682192922725 7.0838e-06 deg tp 2459079.974577385275 (2020-Aug-18.47457739) 3.1348e-05 TDB period 1586.690095806109 4.34 4.6019e-06 1.26e-08 d yr n .2268874060231051 6.5805e-10 deg/d Q 3.330861032961058 6.4404e-09 au   Orbit Determination Parameters    # obs. used (total)      3076      data-arc span      55073 days (150.78 yr)      first obs. used      1870-01-28      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44512      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:51:03   Additional Information  Earth MOID = .992653 au   Jupiter MOID = 2.14353 au   T_jup = 3.334  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.3   n/a MPO492749 IRAS observations used: 14 diameter diameter 82.595 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 23.613 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F. (2008) Minor Planet Bull. 35, 71-72.] [Pilcher, F. (2013) Minor Planet Bull. 40, 158-160.] geometric albedo albedo 0.051   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.726   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.86, mean=14.79, max.=27.13) deg. U-B UB 0.371   0.070 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.86, mean=14.79, max.=27.13) deg. Tholen spectral type spec_T P   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) 102 Miriam (A868 QA)          Discovered 1868-Aug-22 by Peters, C. H. F. at Clinton Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A868 QA = 1944 FC = 1972 PC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 17:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin