+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   296 Phaetusa (A890 QB) Classification: Main-belt Asteroid          SPK-ID: 2000296 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1597225233785383 7.5065e-09   a 2.228749236524024 3.853e-09 au q 1.872767784488416 1.7671e-08 au i 1.747957935109256 4.9726e-07 deg node 121.5646233682999 2.3305e-05 deg peri 252.5090845070748 2.4333e-05 deg M 26.5593247222838 5.7013e-06 deg tp 2459110.838754794059 (2020-Sep-18.33875479) 1.9219e-05 TDB period 1215.318861140199 3.33 3.1515e-06 8.628e-09 d yr n .296218557541559 7.6813e-10 deg/d Q 2.584730688559631 4.4684e-09 au   Orbit Determination Parameters    # obs. used (total)      3312      data-arc span      36712 days (100.51 yr)      first obs. used      1920-09-07      last obs. used      2021-03-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40746      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 10:39:35   Additional Information  Earth MOID = .872823 au   Jupiter MOID = 2.87937 au   T_jup = 3.626  [ 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 12.61   n/a E2021B10   diameter diameter 8.196 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.5385 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pilcher, F. (2011) Minor Planet Bull. 38, 50-52.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] geometric albedo albedo 0.379   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.887   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.25, mean=2.72, max.=3.18) deg. U-B UB 0.463   0.051 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.25, mean=2.72, max.=3.18) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 296 Phaetusa (A890 QB)          Discovered 1890-Aug-19 by Charlois, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A890 QB = 1930 YH = A917 XB  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 00:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin