+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11941 Archinal (1993 KT1) Classification: Inner Main-belt Asteroid          SPK-ID: 2011941 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05023058014680833 3.8721e-08   a 1.951121033249576 5.7352e-09 au q 1.85311509181281 7.7155e-08 au i 25.09906812566884 3.9859e-06 deg node 77.44841357861904 1.0551e-05 deg peri 211.6856578461862 4.8564e-05 deg M 287.3375485405369 4.852e-05 deg tp 2459201.424218573262 (2020-Dec-17.92421857) 0.00013425 TDB period 995.4621298006605 2.73 4.3892e-06 1.202e-08 d yr n .3616410802810644 1.5945e-09 deg/d Q 2.049126974686343 6.0233e-09 au   Orbit Determination Parameters    # obs. used (total)      1927      data-arc span      11117 days (30.44 yr)      first obs. used      1990-03-31      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40566      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:56:16   Additional Information  Earth MOID = .848528 au   Jupiter MOID = 3.03519 au   T_jup = 3.775  [ 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 14.2   n/a MPO452339   diameter diameter 4.847 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 2.717 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Li, B.; Zhao, H.; Han. X.L.; Annable, L.R.; et al. (2013) Minor Planet Bull. 40, 62-63.] [Warner, B.D. (2014) Minor Planet Bull. 41, 102-112.] geometric albedo albedo 0.189   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   11941 Archinal           Discovered 1993 May 23 by C. S. Shoemaker and D. H. Levy at Palomar. An active amateur astronomer, Brent Archinal (b. 1956) specializes in correcting catalog data for stellar groupings and nonstellar objects. He also has finished the most complete catalog yet assembled of open and globular clusters. Today he works for the U.S. Geological Survey in Flagstaff, Arizona. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001111/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1993 KT1 = 1990 FU1 = 1992 BX5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-15 19:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin