+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1090 Sumida (1928 DG) Classification: Main-belt Asteroid          SPK-ID: 2001090 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2197495130419382 3.1514e-08   a 2.360512506880373 5.5814e-09 au q 1.841791032964007 7.3572e-08 au i 21.52608480690604 3.7065e-06 deg node 147.9550609405827 7.6103e-06 deg peri 338.0130150153793 1.0839e-05 deg M 183.0323944625571 9.2691e-06 deg tp 2459651.677160376613 (2022-Mar-13.17716038) 3.5523e-05 TDB period 1324.670563426826 3.63 4.6982e-06 1.286e-08 d yr n .271765682683177 9.6387e-10 deg/d Q 2.87923398079674 6.8079e-09 au   Orbit Determination Parameters    # obs. used (total)      2813      data-arc span      33872 days (92.74 yr)      first obs. used      1928-02-20      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .37605      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:58:15   Additional Information  Earth MOID = .866794 au   Jupiter MOID = 2.197 au   T_jup = 3.427  [ 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 12.5   n/a MPO492762   diameter diameter 12.977 km 0.438 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 2.719 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z. (1991) Icarus 90, 117-122.] [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm] [Warner, B.D.; Megna, R. (2012) Minor Planet Bull. 39, 231.] [Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Lang, K. (2017) Minor Planet Bull. 44, 7-8.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.] geometric albedo albedo 0.311   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   B-V BV 0.693   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.57 deg. U-B UB 0.224   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.57 deg. 1090 Sumida (1928 DG)          Discovered 1928-Feb-20 by Oikawa, O. at Tokyo Independent discovery Feb. 24 by K. Reinmuth, Heidelberg, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1928 DG = 1950 JK = 1957 HH  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-28 06:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin