IOTA/IOTA-ES occultation update for (575) Renate / TYC 2955-00799-1 event on 2012 Dec 19, 14:10 UT Visible from NW USA, W Canada, Russia Summary ------- On 2012 Dec 19 UT, the 19 km diameter asteroid (575) Renate will occult a 9.7 mag star in the constellation Lynx for observers along a path across NW USA, W Canada, Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 14.8 mag (the magnitude of the asteroid) for at most 1.5 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 31 * date and approx. time of event: 2012 Dec 19, 14:03 - 2012 Dec 19, 14:17 UT * geocentric midpoint of event [JD]: 2456281.090425 * magnitude of target star: 9.7 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 1.5 * Moon: 43 % sunlit, 110° distance * Sun: 154° distance * rough path description: NW USA, W Canada, Russia The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 2.14 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .042 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .042", .030", 102° ) * approx speed of asteroid's shadow [km/s]: 12.4425 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2955-00799-1 by 575 Renate on 2012 Dec 19 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 46 0 0 27 3 55 14 17 46 1 39 -3 27 13 9 26 54 41 27 52 58 .. .. .. 47 0 0 28 11 23 14 17 45 2 39 -4 28 20 41 28 2 6 29 0 43 .. .. .. 48 0 0 29 18 44 14 17 45 4 40 -6 29 28 5 29 9 24 30 8 19 28 29 43 49 0 0 30 25 52 14 17 44 5 40 -7 30 35 16 30 16 30 31 15 42 29 36 38 50 0 0 31 32 43 14 17 42 6 41 -8 31 42 9 31 23 19 32 22 46 30 43 16 51 0 0 32 39 13 14 17 40 8 41 -9 32 48 41 32 29 46 33 29 28 31 49 34 52 0 0 33 45 16 14 17 38 9 42 -10 33 54 46 33 35 47 34 35 42 32 55 27 53 0 0 34 50 48 14 17 36 11 43 -12 35 0 20 34 41 18 35 41 23 34 0 51 54 0 0 35 55 46 14 17 33 12 43 -13 36 5 19 35 46 14 36 46 29 35 5 40 55 0 0 37 0 4 14 17 30 13 44 -14 37 9 38 36 50 30 37 50 53 36 9 52 56 0 0 38 3 38 14 17 27 14 44 -15 38 13 14 37 54 4 38 54 33 37 13 22 57 0 0 39 6 26 14 17 24 16 45 -16 39 16 2 38 56 51 39 57 25 38 16 6 58 0 0 40 8 23 14 17 20 17 46 -17 40 18 0 39 58 48 40 59 24 39 18 1 59 0 0 41 9 26 14 17 16 18 47 -18 41 19 3 40 59 51 42 0 27 40 19 4 60 0 0 42 9 32 14 17 12 20 47 -19 42 19 8 41 59 56 43 0 32 41 19 10 61 0 0 43 8 37 14 17 8 21 48 -20 43 18 13 42 59 3 43 59 35 42 18 18 62 0 0 44 6 40 14 17 3 22 49 -21 44 16 16 43 57 6 44 57 34 43 16 25 63 0 0 45 3 38 14 16 58 23 50 -22 45 13 13 44 54 5 45 54 27 44 13 28 64 0 0 45 59 29 14 16 54 24 50 -23 46 9 2 45 49 57 46 50 11 45 9 26 65 0 0 46 54 11 14 16 49 25 51 -23 47 3 43 46 44 41 47 44 45 46 4 16 66 0 0 47 47 43 14 16 44 26 52 -24 47 57 12 47 38 14 48 38 7 46 57 57 67 0 0 48 40 2 14 16 39 27 53 -25 48 49 30 48 30 36 49 30 16 47 50 27 68 0 0 49 31 10 14 16 34 28 54 -26 49 40 35 49 21 45 50 21 11 48 41 46 69 0 0 50 21 3 14 16 29 29 55 -26 50 30 26 50 11 42 51 10 51 49 31 53 70 0 0 51 9 43 14 16 24 30 56 -27 51 19 3 51 0 24 51 59 16 50 20 47 71 0 0 51 57 8 14 16 18 31 57 -28 52 6 25 51 47 52 52 46 26 51 8 27 72 0 0 52 43 19 14 16 13 32 58 -28 52 52 33 52 34 6 53 32 20 51 54 54 73 0 0 53 28 16 14 16 8 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53 36 44 -131 0 0 53 41 21 14 6 25 50 283 -24 53 50 29 53 32 14 54 29 51 52 53 26 -130 0 0 52 57 9 14 6 17 49 284 -23 53 6 20 52 47 58 53 45 55 52 8 58 -129 0 0 52 11 45 14 6 10 48 286 -22 52 20 59 52 2 32 53 0 48 51 23 19 -128 0 0 51 25 9 14 6 3 47 287 -22 51 34 26 51 15 53 52 14 27 50 36 28 -127 0 0 50 37 22 14 5 55 47 288 -21 50 46 42 50 28 3 51 26 53 49 48 27 -126 0 0 49 48 23 14 5 48 46 290 -20 49 57 45 49 39 2 50 38 7 48 59 16 -125 0 0 48 58 13 14 5 40 45 291 -19 49 7 37 48 48 50 49 48 9 48 8 55 -124 0 0 48 6 53 14 5 33 44 292 -18 48 16 19 47 57 28 48 56 59 47 17 25 -123 0 0 47 14 24 14 5 25 43 294 -18 47 23 52 47 4 57 48 4 39 46 24 47 -122 0 0 46 20 47 14 5 17 42 295 -17 46 30 16 46 11 19 47 11 9 45 31 3 -121 0 0 45 26 3 14 5 10 41 296 -16 45 35 34 45 16 34 46 16 32 44 36 13 -120 0 0 44 30 15 14 5 2 40 297 -15 44 39 46 44 20 45 45 20 49 43 40 20 -119 0 0 43 33 24 14 4 54 39 298 -14 43 42 56 43 23 53 44 24 1 42 43 26 -118 0 0 42 35 33 14 4 47 38 299 -13 42 45 5 42 26 2 43 26 12 41 45 33 -117 0 0 41 36 43 14 4 39 37 300 -12 41 46 16 41 27 12 42 27 23 40 46 43 -116 0 0 40 36 59 14 4 32 36 301 -11 40 46 31 40 27 28 41 27 37 39 46 59 -115 0 0 39 36 22 14 4 25 34 302 -10 39 45 54 39 26 51 40 26 58 38 46 24 -114 0 0 38 34 55 14 4 18 33 303 -9 38 44 27 38 25 25 39 25 28 37 45 1 -113 0 0 37 32 43 14 4 11 32 304 -8 37 42 13 37 23 14 38 23 10 36 42 54 -112 0 0 36 29 49 14 4 4 31 305 -6 36 39 18 36 20 21 37 20 9 35 40 6 -111 0 0 35 26 16 14 3 57 30 306 -5 35 35 43 35 16 49 36 16 28 34 36 40 -110 0 0 34 22 8 14 3 50 28 306 -4 34 31 34 34 12 43 35 12 11 33 32 41 -109 0 0 33 17 29 14 3 44 27 307 -3 33 26 53 33 8 7 34 7 22 32 28 13 -108 0 0 32 12 24 14 3 38 26 308 -2 32 21 46 32 3 4 33 2 5 31 23 19 -107 0 0 31 6 57 14 3 32 24 309 0 31 16 16 30 57 38 31 56 25 30 18 4 Uncertainty in time = +/- 4 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 2955-00799-1 * constellation : Lynx * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 08 43.5763 DE: +44 24 42.133 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .016 ) * V mag [mag]: 9.7 * B mag [mag]: 10.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (575) Renate approx. diameter [km]: 19 approx. diameter ["]: .014 distance from Earth [AU]: 1.83700 * orbital information: orbit source: Preston date of fit: 2012 Nov 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1188 number of rejected observations: 28 time covered by the observations: 1905 Sep 19 - 2012 Nov 27 1 sigma uncertainty ellipse (major, minor, PA): 0.039, 0.025, 104° remarks: * orbital elements for (575) Renate : Mean anomaly = 121.62513878 deg Arg. of pericenter = 334.28933324 deg Long. of node = 349.71982367 deg Inclination = 15.00517262 deg Eccentricity = 0.12709724 Semimajor axis = 2.55578240 AU Perihelion dist = 2.23094950 AU Mag: H = 10.76, G = 0.15 Epoch of elements : MJD 56280.59100000 TDT (2012 Dec 19.591) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 19 575 Renate 14h 10.2m UT 9.7 7 8 43.576 44 24 42.13TYC 2955-00799-1 10.1 14.8 19 1.5 1.837 -3.087 6.14 166.0490 44.411 -33.21 -23.42 14.1702 0.08519 0.45815 -6.90457 1.28377 -0.00179 -0.00192 2000 121.48257620121219.00000334.289333349.719824 15.0051730.12709724 2.5557824 2.230949510.7 5.00.15 RATE 2.4122280 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.042 0.030 102 3.14 0.030 0 0 3 3 056264.0020121219_0799-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 29, 23:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org