+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   155 Scylla (A875 VE) Classification: Main-belt Asteroid          SPK-ID: 2000155 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2744698122012382 1.4045e-08   a 2.762224394702142 8.3914e-09 au q 2.004077183830566 4.0213e-08 au i 11.35509993073268 5.3026e-07 deg node 40.83150574656849 1.4547e-06 deg peri 46.20067040462425 4.2816e-06 deg M 217.9275002022024 6.2701e-06 deg tp 2459862.250659509127 (2022-Oct-09.75065951) 3.1373e-05 TDB period 1676.82160701292 4.59 7.6411e-06 2.092e-08 d yr n .2146918899985442 9.7833e-10 deg/d Q 3.520371605573717 1.0695e-08 au   Orbit Determination Parameters    # obs. used (total)      2363      data-arc span      52930 days (144.91 yr)      first obs. used      1875-11-09      last obs. used      2020-10-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42086      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 10:23:05   Additional Information  Earth MOID = 1.03744 au   Jupiter MOID = 1.85517 au   T_jup = 3.258  [ 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 11.22   n/a E2021B10   diameter diameter 39.605 km 0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.9597 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Addleman, D.; Covele, B.; Duncan, A.; Johnson, J.; et al. (2005) Minor Planet Bull. 32, 76-78.] [Owings, L.E. (2009) Minor Planet Bull. 36, 51-52.] [Pilcher, F.; Jardine, D. (2009) Minor Planet Bull. 36, 52-54.] [Stephens, R.D. (2014) Minor Planet Bull. 41, 171-175.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.] geometric albedo albedo 0.027   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.688   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=8.15, mean=12.52, max.=16.90) deg. U-B UB 0.234   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=8.15, mean=12.52, max.=16.90) deg. Tholen spectral type spec_T XFC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 155 Scylla (A875 VE)          Discovered 1875-Nov-08 by Palisa, J. at Pola Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A875 VE = 1930 UN = 1930 XS = 1934 RU = 1939 TK = 1941 HL = 1950 FL = 1950 FN = A907 TJ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 09:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin