+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 108 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2360727696805593 1.5518e-08   a 2.781371067234648 4.9093e-09 au q 2.124765095883191 4.3094e-08 au i 4.070357594044929 5.9346e-07 deg node 197.1325616431862 3.1634e-06 deg peri 174.6137004954833 5.6076e-06 deg M 83.79019114708048 2.6833e-06 deg tp 2459002.153939813423 (2020-Jun-01.65393981) 1.2482e-05 TDB period 1694.286404216113 4.64 4.4858e-06 1.228e-08 d yr n .2124788342184445 5.6256e-10 deg/d Q 3.437977038586104 6.0682e-09 au   Orbit Determination Parameters    # obs. used (total)      3536      data-arc span      57454 days (157.30 yr)      first obs. used      1864-01-30      last obs. used      2021-05-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48061      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 10:30:02   Additional Information  Earth MOID = 1.12421 au   Jupiter MOID = 2.03082 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 8.76   n/a MPCxxxxx 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-Aug-02 05:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin