+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .198021348604568 2.8854e-08   a 2.247899781273188 4.7641e-09 au q 1.802767635057558 6.5314e-08 au i 4.344501227452453 3.3007e-06 deg node 147.0983259963165 4.3503e-05 deg peri 151.1421902619309 4.4256e-05 deg M 236.5377314643279 9.4432e-06 deg tp 2459622.677998154236 (2022-Feb-12.17799815) 3.2798e-05 TDB period 1231.016416093246 3.37 3.9135e-06 1.071e-08 d yr n .2924412666587307 9.2969e-10 deg/d Q 2.693031927488818 5.7075e-09 au   Orbit Determination Parameters    # obs. used (total)      3230      data-arc span      42472 days (116.28 yr)      first obs. used      1904-10-09      last obs. used      2021-01-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41741      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:52:43   Additional Information  Earth MOID = .786606 au   Jupiter MOID = 2.52477 au   T_jup = 3.600  [ 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 11.83   n/a E2021B10   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 [ show close-approach data ] Alternate Designations  1927 KA = A904 TA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 07:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin