+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74 Galatea (A862 QA) Classification: Main-belt Asteroid          SPK-ID: 2000074 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 105 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2359739510809948 1.5551e-08   a 2.780836740075779 4.8995e-09 au q 2.124631707208904 4.3178e-08 au i 4.070422623763453 5.9368e-07 deg node 197.1413835761875 3.1638e-06 deg peri 174.5704041815909 5.6154e-06 deg M 42.1809725419873 2.6705e-06 deg tp 2459002.038735623853 (2020-Jun-01.53873562) 1.2502e-05 TDB period 1693.798195484818 4.64 4.4764e-06 1.226e-08 d yr n .2125400776548571 5.6171e-10 deg/d Q 3.437041772942654 6.0557e-09 au   Orbit Determination Parameters    # obs. used (total)      3461      data-arc span      57387 days (157.12 yr)      first obs. used      1864-01-30      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4807      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 10:15:13   Additional Information  Earth MOID = 1.1234 au   Jupiter MOID = 2.03096 au   T_jup = 3.288  [ 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 8.77   n/a E2021B10 IRAS observations used: 9 diameter diameter 118.71 km 2.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 rotation period rot_per 17.268 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F. (2008) Minor Planet Bull. 35, 135-138.] [Pilcher, F. (2009) Minor Planet Bull. 36, 133-136.] geometric albedo albedo 0.0431   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 B-V BV 0.686   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.33, mean=4.63, max.=6.93) deg. U-B UB 0.320   0.088 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.33, mean=4.63, max.=6.93) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 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) 74 Galatea (A862 QA)          Discovered 1862-Aug-29 by Tempel, E. W. at Marseille Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A862 QA = A908 OC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 07:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin