+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1117 Reginita (1927 KA) Classification: Main-belt Asteroid          SPK-ID: 2001117 [ 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 51 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1980585198007934 1.1752e-08   a 2.247531572215802 4.039e-09 au q 1.80238879581719 2.6326e-08 au i 4.344708031016902 6.1212e-07 deg node 147.0997615274777 1.2121e-05 deg peri 151.1885862992204 1.2605e-05 deg M 293.8132323970124 4.2025e-06 deg tp 2459622.769386671880 (2022-Feb-12.26938667) 1.4613e-05 TDB period 1230.71396522165 3.37 3.3175e-06 9.083e-09 d yr n .2925131347925872 7.885e-10 deg/d Q 2.692674348614414 4.8389e-09 au   Orbit Determination Parameters    # obs. used (total)      3727      data-arc span      42628 days (116.71 yr)      first obs. used      1904-10-09      last obs. used      2021-06-25      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .40202      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 11:58:38   Additional Information  Earth MOID = .787738 au   Jupiter MOID = 2.52435 au   T_jup = 3.600  [ 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 11.82   n/a MPCxxxxx   diameter diameter 10.193 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 2.946 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.] [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.] [Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Tan, H.; Li, B.; Gao, X. (2017) Minor Planet Bull. 44, 307.] [Franco, L.; Marchini, A.; Baj, G.; Scarfi, G.; et al. (2018) Minor Planet Bull. 45, 399-400.] [Franco, L.; Marchini, A.; Galdies, C; Brincat, S.M.; Grech, W. (2019) Minor Planet Bull. 46, 269-271.] [Galdies, C.; Brincat, S.M.; Grech, W. (2019) Minor Planet Bull. 46, 61-62.] geometric albedo albedo 0.293   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1117 Reginita (1927 KA)          Discovered 1927-May-24 by Comas Sola, J. at Barcelona Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1927 KA = A904 TA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 23:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin