IOTA/IOTA-ES occultation update for (13832) 1999 XR13 / TYC 1878-00356-1 event on 2012 Nov 27, 03:09 UT Visible from Africa, Caribbean, Mexico Summary ------- On 2012 Nov 27 UT, the 42 km diameter asteroid (13832) 1999 XR13 will occult a 10.7 mag star in the constellation Gemini for observers along a path across Africa, Caribbean, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.2 mag to 15.9 mag (the magnitude of the asteroid) for at most 3.4 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: 27 * date and approx. time of event: 2012 Nov 27, 03:00 - 2012 Nov 27, 03:17 UT * geocentric midpoint of event [JD]: 2456258.631 * magnitude of target star: 10.7 * magnitude drop [mag]: 5.2 * estimated maximum duration [s]: 3.4 * Moon: 98 % sunlit, 47° distance * Sun: 150° distance * rough path description: Africa, Caribbean, Mexico The occultation path -------------------- * approximate projected width [km]: 43 * 1 sigma uncertainty interval [path widths]: +/- 2.50 * 1 sigma uncertainty interval [seconds]: +/- 8.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .063 +/- .051) * 1 sigma uncertainty ellipse (major, minor, PA): ( .064", .050", 76° ) * approx speed of asteroid's shadow [km/s]: 12.2299 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1878-00356-1 by 13832 1999 XR13 on 2012 Nov 27 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 -115 0 0 13 21 40 3 17 12 0 65 -30 13 34 24 13 8 55 14 37 57 .. .. .. -114 0 0 13 48 22 3 17 12 2 65 -31 14 1 4 13 35 40 15 4 24 12 31 59 -113 0 0 14 14 29 3 17 12 3 66 -32 14 27 8 14 1 49 15 30 15 12 58 22 -112 0 0 14 40 1 3 17 11 4 66 -33 14 52 37 14 27 24 15 55 31 13 24 10 -111 0 0 15 4 58 3 17 11 5 66 -34 15 17 32 14 52 23 16 20 12 13 49 23 -110 0 0 15 29 19 3 17 10 6 66 -35 15 41 51 15 16 48 16 44 19 14 14 0 -109 0 0 15 53 6 3 17 9 7 67 -36 16 5 34 15 40 36 17 7 50 14 38 1 -108 0 0 16 16 17 3 17 7 8 67 -37 16 28 43 16 3 50 17 30 47 15 1 28 -107 0 0 16 38 53 3 17 6 9 67 -38 16 51 17 16 26 29 17 53 8 15 24 18 -106 0 0 17 0 54 3 17 5 10 68 -39 17 13 15 16 48 32 18 14 55 15 46 34 -105 0 0 17 22 20 3 17 3 11 68 -40 17 34 39 17 10 0 18 36 6 16 8 14 -104 0 0 17 43 10 3 17 1 12 68 -41 17 55 27 17 30 53 18 56 44 16 29 18 -103 0 0 18 3 26 3 16 59 13 68 -42 18 15 41 17 51 11 19 16 46 16 49 48 -102 0 0 18 23 7 3 16 57 14 69 -43 18 35 20 18 10 54 19 36 14 17 9 42 -101 0 0 18 42 14 3 16 55 15 69 -44 18 54 24 18 30 3 19 55 7 17 29 2 -100 0 0 19 0 45 3 16 52 16 69 -45 19 12 53 18 48 37 20 13 27 17 47 46 - 99 0 0 19 18 43 3 16 50 17 70 -46 19 30 49 19 6 36 20 31 12 18 5 56 - 98 0 0 19 36 5 3 16 47 18 70 -47 19 48 10 19 24 1 20 48 23 18 23 31 - 97 0 0 19 52 54 3 16 44 19 70 -48 20 4 56 19 40 52 21 5 0 18 40 31 - 96 0 0 20 9 9 3 16 41 20 71 -49 20 21 9 19 57 8 21 21 3 18 56 57 - 95 0 0 20 24 49 3 16 38 21 71 -50 20 36 48 20 12 50 21 36 33 19 12 49 - 94 0 0 20 39 56 3 16 35 22 71 -51 20 51 53 20 27 59 21 51 29 19 28 6 - 93 0 0 20 54 29 3 16 32 23 72 -52 21 6 24 20 42 34 22 5 52 19 42 50 - 92 0 0 21 8 29 3 16 28 24 72 -53 21 20 22 20 56 35 22 19 42 19 56 59 - 91 0 0 21 21 55 3 16 25 24 72 -54 21 33 47 21 10 3 22 32 59 20 10 35 - 90 0 0 21 34 48 3 16 21 25 73 -55 21 46 38 21 22 58 22 45 42 20 23 37 - 89 0 0 21 47 8 3 16 17 26 73 -56 21 58 57 21 35 19 22 57 54 20 36 6 - 88 0 0 21 58 55 3 16 13 27 73 -57 22 10 42 21 47 7 23 9 32 20 48 2 - 87 0 0 22 10 9 3 16 9 28 73 -58 22 21 55 21 58 23 23 20 38 20 59 24 - 86 0 0 22 20 51 3 16 5 29 74 -59 22 32 35 22 9 6 23 31 12 21 10 14 - 85 0 0 22 31 0 3 16 1 30 74 -59 22 42 43 22 19 16 23 41 14 21 20 30 - 84 0 0 22 40 37 3 15 57 31 74 -60 22 52 19 22 28 54 23 50 44 21 30 14 - 83 0 0 22 49 41 3 15 52 32 75 -61 23 1 22 22 37 59 23 59 41 21 39 25 - 82 0 0 22 58 13 3 15 48 33 75 -62 23 9 53 22 46 33 24 8 7 21 48 4 - 81 0 0 23 6 14 3 15 43 34 75 -63 23 17 53 22 54 34 24 16 2 21 56 10 - 80 0 0 23 13 42 3 15 38 35 76 -64 23 25 20 23 2 3 24 23 25 22 3 44 - 79 0 0 23 20 39 3 15 34 35 76 -65 23 32 16 23 9 1 24 30 16 22 10 46 - 78 0 0 23 27 4 3 15 29 36 76 -66 23 38 40 23 15 27 24 36 37 22 17 16 - 77 0 0 23 32 57 3 15 24 37 77 -67 23 44 33 23 21 21 24 42 26 22 23 13 - 76 0 0 23 38 19 3 15 19 38 77 -68 23 49 54 23 26 44 24 47 44 22 28 40 - 75 0 0 23 43 10 3 15 13 39 77 -68 23 54 44 23 31 35 24 52 31 22 33 34 - 74 0 0 23 47 29 3 15 8 40 78 -69 23 59 3 23 35 55 24 56 47 22 37 57 - 73 0 0 23 51 18 3 15 3 41 78 -70 24 2 51 23 39 44 25 0 33 22 41 48 - 72 0 0 23 54 35 3 14 57 42 78 -71 24 6 8 23 43 1 25 3 47 22 45 8 - 71 0 0 23 57 21 3 14 52 43 78 -72 24 8 54 23 45 48 25 6 31 22 47 56 - 70 0 0 23 59 36 3 14 46 43 79 -73 24 11 8 23 48 3 25 8 45 22 50 13 - 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39 0 0 20 55 3 3 11 11 70 76 -79 21 6 55 20 43 10 22 6 13 19 43 37 - 38 0 0 20 40 49 3 11 3 71 75 -78 20 52 43 20 28 54 21 52 9 19 29 14 - 37 0 0 20 26 4 3 10 55 72 74 -77 20 37 59 20 14 7 21 37 33 19 14 19 - 36 0 0 20 10 47 3 10 47 73 73 -76 20 22 44 19 58 49 21 22 25 18 58 52 - 35 0 0 19 54 58 3 10 38 73 72 -75 20 6 57 19 42 58 21 6 47 18 42 53 - 34 0 0 19 38 38 3 10 30 74 70 -74 19 50 39 19 26 36 20 50 37 18 26 22 - 33 0 0 19 21 45 3 10 22 75 68 -73 19 33 48 19 9 42 20 33 55 18 9 20 - 32 0 0 19 4 22 3 10 13 76 66 -72 19 16 26 18 52 17 20 16 42 17 51 45 - 31 0 0 18 46 26 3 10 4 76 64 -71 18 58 32 18 34 19 19 58 57 17 33 38 - 30 0 0 18 27 58 3 9 56 77 61 -70 18 40 6 18 15 49 19 40 41 17 14 59 - 29 0 0 18 8 58 3 9 47 78 58 -69 18 21 9 17 56 48 19 21 53 16 55 47 - 28 0 0 17 49 27 3 9 38 78 55 -68 18 1 39 17 37 14 19 2 33 16 36 4 - 27 0 0 17 29 24 3 9 29 79 51 -68 17 41 38 17 17 9 18 42 42 16 15 49 - 26 0 0 17 8 48 3 9 21 79 47 -67 17 21 5 16 56 32 18 22 19 15 55 1 - 25 0 0 16 47 41 3 9 12 80 42 -66 17 0 0 16 35 23 18 1 24 15 33 41 - 24 0 0 16 26 2 3 9 3 80 37 -65 16 38 23 16 13 42 17 39 58 15 11 50 - 23 0 0 16 3 52 3 8 54 80 32 -64 16 16 14 15 51 29 17 18 0 14 49 26 - 22 0 0 15 41 9 3 8 45 80 26 -63 15 53 34 15 28 44 16 55 30 14 26 30 - 21 0 0 15 17 55 3 8 35 80 21 -62 15 30 22 15 5 28 16 32 29 14 3 3 - 20 0 0 14 54 9 3 8 26 80 15 -61 15 6 38 14 41 40 16 8 56 13 39 4 - 19 0 0 14 29 52 3 8 17 80 10 -60 14 42 23 14 17 20 15 44 53 13 14 33 - 18 0 0 14 5 3 3 8 8 80 4 -59 14 17 37 13 52 29 15 20 17 12 49 31 - 17 0 0 13 39 44 3 7 58 79 359 -58 13 52 19 13 27 7 14 55 11 12 23 57 - 16 0 0 13 13 53 3 7 49 79 355 -57 13 26 31 13 1 14 14 29 34 11 57 52 - 15 0 0 12 47 31 3 7 40 78 351 -56 13 0 11 12 34 50 14 3 26 11 31 17 - 14 0 0 12 20 38 3 7 30 78 347 -55 12 33 21 12 7 55 13 36 47 11 4 10 - 13 0 0 11 53 16 3 7 21 77 344 -53 12 6 1 11 40 30 13 9 38 10 36 33 - 12 0 0 11 25 22 3 7 12 76 341 -52 11 38 10 11 12 34 12 41 59 10 8 26 - 11 0 0 10 56 59 3 7 2 76 338 -51 11 9 49 10 44 9 12 13 50 9 39 48 - 10 0 0 10 28 6 3 6 53 75 336 -50 10 40 59 10 15 14 11 45 11 9 10 41 - 9 0 0 9 58 44 3 6 43 74 333 -49 10 11 39 9 45 49 11 16 3 8 41 5 - 8 0 0 9 28 53 3 6 34 73 332 -48 9 41 50 9 15 56 10 46 26 8 11 0 - 7 0 0 8 58 34 3 6 24 72 330 -47 9 11 33 8 45 34 10 16 20 7 40 26 - 6 0 0 8 27 46 3 6 15 71 328 -46 8 40 47 8 14 43 9 45 46 7 9 24 - 5 0 0 7 56 30 3 6 5 70 327 -45 8 9 34 7 43 25 9 14 44 6 37 54 - 4 0 0 7 24 47 3 5 56 69 326 -44 7 37 53 7 11 40 8 43 15 6 5 57 - 3 0 0 6 52 37 3 5 47 68 325 -43 7 5 45 6 39 28 8 11 19 5 33 33 - 2 0 0 6 20 1 3 5 37 67 324 -42 6 33 12 6 6 50 7 38 56 5 0 43 - 1 0 0 5 46 59 3 5 28 66 323 -41 6 0 12 5 33 45 7 6 8 4 27 28 0 0 0 5 13 32 3 5 19 65 322 -40 5 26 47 5 0 16 6 32 54 3 53 48 1 0 0 4 39 41 3 5 9 64 321 -38 4 52 58 4 26 23 5 59 16 3 19 43 2 0 0 4 5 25 3 5 0 63 320 -37 4 18 45 3 52 5 5 25 13 2 45 14 3 0 0 3 30 47 3 4 51 62 320 -36 3 44 8 3 17 25 4 50 47 2 10 23 4 0 0 2 55 46 3 4 42 61 319 -35 3 9 10 2 42 22 4 15 59 1 35 10 5 0 0 2 20 24 3 4 33 60 319 -34 2 33 49 2 6 57 3 40 49 0 59 35 6 0 0 1 44 40 3 4 24 59 318 -33 1 58 8 1 31 12 3 5 17 0 23 40 7 0 0 1 8 37 3 4 15 58 318 -32 1 22 7 0 55 7 2 29 25 - 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9 5 19 22 0 0 - 8 21 8 3 2 14 41 312 -15 - 8 7 18 - 8 34 59 - 6 58 17 - 9 44 26 23 0 0 - 9 0 13 3 2 7 40 312 -14 - 8 46 22 - 9 14 5 - 7 37 18 -10 23 35 24 0 0 - 9 39 19 3 2 1 39 312 -12 - 9 25 28 - 9 53 12 - 8 16 21 -11 2 45 25 0 0 -10 18 26 3 1 54 38 312 -11 -10 4 34 -10 32 19 - 8 55 24 -11 41 54 26 0 0 -10 57 31 3 1 48 36 311 -10 -10 43 39 -11 11 24 - 9 34 27 -12 21 2 27 0 0 -11 36 34 3 1 41 35 311 -9 -11 22 42 -11 50 28 -10 13 29 -13 0 7 28 0 0 -12 15 34 3 1 35 34 311 -8 -12 1 41 -12 29 27 -10 52 28 -13 39 7 29 0 0 -12 54 29 3 1 29 33 310 -7 -12 40 36 -13 8 22 -11 31 22 -14 18 2 30 0 0 -13 33 17 3 1 24 32 310 -6 -13 19 24 -13 47 11 -12 10 11 -14 56 50 31 0 0 -14 11 58 3 1 18 31 310 -4 -13 58 6 -14 25 52 -12 48 53 -15 35 31 32 0 0 -14 50 31 3 1 13 30 309 -3 -14 36 39 -15 4 24 -13 27 27 -16 14 2 33 0 0 -15 28 54 3 1 8 28 309 -2 -15 15 2 -15 42 47 -14 5 53 -16 52 22 34 0 0 -16 7 6 3 1 3 27 309 -1 -15 53 14 -16 20 58 -14 44 7 -17 30 31 35 0 0 -16 45 6 3 0 58 26 309 0 -16 31 15 -16 58 57 -15 22 11 -18 8 27 Uncertainty in time = +/- 10 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 1878-00356-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 24 28.5745 DE: +24 10 57.599 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 10.7 * B mag [mag]: 12.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13832) 1999 XR13 approx. diameter [km]: 42 approx. diameter ["]: .022 distance from Earth [AU]: 2.66300 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 752 number of rejected observations: 11 time covered by the observations: 1955 Oct 23 - 2012 Sep 19 1 sigma uncertainty ellipse (major, minor, PA): 0.061, 0.046, 75° remarks: * orbital elements for (13832) 1999 XR13 : Mean anomaly = 248.60520542 deg Arg. of pericenter = 125.07440575 deg Long. of node = 85.26219629 deg Inclination = 16.29930794 deg Eccentricity = 0.11284023 Semimajor axis = 3.37485677 AU Perihelion dist = 2.99403715 AU Mag: H = 10.57, G = 0.15 Epoch of elements : MJD 56258.13100000 TDT (2012 Nov 27.131) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 27 13832 1999 XR13 3h 8.6m UT 10.7 6 24 28.575 24 10 57.60TYC 1878-00356-1 12.4 15.9 42 3.4 2.663 -1.523 9.27 -17.4829 24.180 129.76 -21.18 3.1440 -0.06814 -0.15273 -6.30593 2.80801 -0.00305 0.00005 2000 247.31260220121119.00000125.074406 85.262196 16.2993080.11284023 3.3748568 2.994037210.5 5.00.15 RATE 1.5897220 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.064 0.050 76 3.50 0.054 0 0-5-1 056247.0020121127_0356-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org