+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   760 Massinga (A913 QD) Classification: Main-belt Asteroid          SPK-ID: 2000760 [ 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 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2333343511758468 3.7848e-08   a 3.146396432757358 1.2661e-08 au q 2.412234062577921 1.1936e-07 au i 12.53914767021535 4.2062e-06 deg node 331.5472857708673 2.0738e-05 deg peri 200.56291401 2.2716e-05 deg M 176.769242990521 1.1096e-05 deg tp 2457999.526016721897 (2017-Sep-03.02601672) 6.0505e-05 TDB period 2038.536952944016 5.58 1.2305e-05 3.369e-08 d yr n .1765972402315763 1.066e-09 deg/d Q 3.880558802936795 1.5616e-08 au   Orbit Determination Parameters    # obs. used (total)      2522      data-arc span      39057 days (106.93 yr)      first obs. used      1913-08-28      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45544      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:21:32   Additional Information  Earth MOID = 1.42306 au   Jupiter MOID = 1.15312 au   T_jup = 3.130  [ 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 7.9   n/a MPO502160 IRAS observations used: 9 diameter diameter 71.29 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 rotation period rot_per 10.72 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Koff, R.A. (2000) Minor Planet Bull. 27, 26-27.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.2276   0.012 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 B-V BV 0.947   0.054 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.56, mean=7.77, max.=8.98) deg. U-B UB 0.557   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.56, mean=7.77, max.=8.98) deg. Tholen spectral type spec_T SU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 760 Massinga (A913 QD)          Discovered 1913-Aug-28 by Kaiser, F. at Heidelberg Independent discovery earlier the same night by G. Neujmin, Simeis. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A913 QD = 1941 SL2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-21 14:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin