IOTA/IOTA-ES occultation update for (542) Susanna / TYC 0765-01263-1 event on 2009 Dec 05, 22:11 UT Visible from Summary ------- On 2009 Dec 05 UT, the 42 km diameter asteroid (542) Susanna will occult a 11.1 mag star in the constellation Canis Minor for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 14.0 mag (the magnitude of the asteroid) for at most 5.8 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: 43 * date and approx. time of event: 2009 Dec 05, 22:03 - 2009 Dec 05, 22:24 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 2.9 * estimated maximum duration [s]: 5.8 * Moon: 83 % sunlit, 15° distance * Sun: 138° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 1.53 * 1 sigma uncertainty interval [seconds]: +/- 10.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .051 +/- .043) * 1 sigma uncertainty ellipse (major, minor, PA): ( .051", .043", 89° ) * approx speed of asteroid's shadow [km/s]: 7.1600 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0765-01263-1 by 542 Susanna on 2009 Dec 5 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 - 22 0 0 -32 57 13 22 24 4 0 80 -21 -32 43 25 -33 11 4 .. .. .. -33 53 40 - 21 0 0 -32 48 39 22 24 4 1 80 -21 -32 34 51 -33 2 30 .. .. .. -33 45 6 - 20 0 0 -32 40 6 22 24 3 2 79 -22 -32 26 17 -32 53 56 .. .. .. -33 36 32 - 19 0 0 -32 31 33 22 24 3 3 79 -23 -32 17 44 -32 45 23 .. .. .. -33 27 59 - 18 0 0 -32 23 0 22 24 2 4 78 -23 -32 9 12 -32 36 51 .. .. .. -33 19 26 - 17 0 0 -32 14 29 22 24 1 5 77 -24 -32 0 41 -32 28 20 -31 18 40 -33 10 55 - 16 0 0 -32 5 59 22 23 59 6 77 -25 -31 52 11 -32 19 49 -31 10 10 -33 2 24 - 15 0 0 -31 57 30 22 23 58 6 76 -25 -31 43 42 -32 11 20 -31 1 41 -32 53 55 - 14 0 0 -31 49 3 22 23 56 7 76 -26 -31 35 15 -32 2 53 -30 53 14 -32 45 27 - 13 0 0 -31 40 37 22 23 54 8 75 -27 -31 26 49 -31 54 27 -30 44 49 -32 37 1 - 12 0 0 -31 32 13 22 23 51 9 75 -27 -31 18 25 -31 46 3 -30 36 25 -32 28 36 - 11 0 0 -31 23 51 22 23 49 10 74 -28 -31 10 3 -31 37 40 -30 28 4 -32 20 14 - 10 0 0 -31 15 31 22 23 46 11 74 -28 -31 1 43 -31 29 20 -30 19 44 -32 11 53 - 9 0 0 -31 7 13 22 23 43 11 73 -29 -30 53 26 -31 21 2 -30 11 27 -32 3 35 - 8 0 0 -30 58 58 22 23 40 12 73 -30 -30 45 10 -31 12 47 -30 3 13 -31 55 18 - 7 0 0 -30 50 45 22 23 36 13 72 -30 -30 36 58 -31 4 34 -29 55 0 -31 47 5 - 6 0 0 -30 42 35 22 23 32 14 72 -31 -30 28 48 -30 56 24 -29 46 51 -31 38 54 - 5 0 0 -30 34 27 22 23 28 15 71 -31 -30 20 41 -30 48 16 -29 38 44 -31 30 46 - 4 0 0 -30 26 23 22 23 24 16 71 -32 -30 12 37 -30 40 12 -29 30 41 -31 22 41 - 3 0 0 -30 18 22 22 23 20 17 70 -32 -30 4 36 -30 32 11 -29 22 41 -31 14 39 - 2 0 0 -30 10 24 22 23 15 17 69 -33 -29 56 38 -30 24 13 -29 14 44 -31 6 41 - 1 0 0 -30 2 30 22 23 10 18 69 -33 -29 48 44 -30 16 18 -29 6 50 -30 58 46 0 0 0 -29 54 39 22 23 5 19 68 -34 -29 40 54 -30 8 27 -28 59 0 -30 50 54 1 0 0 -29 46 52 22 23 0 20 68 -34 -29 33 7 -30 0 40 -28 51 14 -30 43 6 2 0 0 -29 39 9 22 22 54 21 67 -35 -29 25 24 -29 52 57 -28 43 32 -30 35 22 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27 -28 12 53 -27 3 45 -28 55 8 17 0 0 -27 52 40 22 21 6 33 58 -40 -27 38 58 -28 6 24 -26 57 17 -28 48 38 18 0 0 -27 46 17 22 20 58 34 57 -40 -27 32 35 -28 0 0 -26 50 55 -28 42 13 19 0 0 -27 39 59 22 20 49 34 57 -40 -27 26 18 -27 53 42 -26 44 39 -28 35 55 20 0 0 -27 33 48 22 20 40 35 56 -40 -27 20 7 -27 47 31 -26 38 29 -28 29 43 21 0 0 -27 27 43 22 20 30 36 55 -40 -27 14 2 -27 41 26 -26 32 25 -28 23 37 22 0 0 -27 21 44 22 20 21 37 55 -40 -27 8 4 -27 35 27 -26 26 27 -28 17 37 23 0 0 -27 15 52 22 20 11 37 54 -40 -27 2 12 -27 29 34 -26 20 35 -28 11 43 24 0 0 -27 10 6 22 20 2 38 53 -40 -26 56 26 -27 23 48 -26 14 51 -28 5 56 25 0 0 -27 4 27 22 19 52 39 52 -41 -26 50 47 -27 18 8 -26 9 12 -28 0 16 26 0 0 -26 58 54 22 19 42 40 51 -41 -26 45 15 -27 12 35 -26 3 41 -27 54 42 27 0 0 -26 53 28 22 19 31 40 51 -41 -26 39 49 -27 7 9 -25 58 16 -27 49 15 28 0 0 -26 48 9 22 19 21 41 50 -41 -26 34 30 -27 1 50 -25 52 57 -27 43 55 29 0 0 -26 42 57 22 19 10 42 49 -41 -26 29 18 -26 56 37 -25 47 46 -27 38 42 30 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29 19 -25 56 32 -24 47 56 -26 38 28 44 0 0 -25 39 35 22 16 17 51 33 -38 -25 25 59 -25 53 12 -24 44 37 -26 35 7 45 0 0 -25 36 23 22 16 5 52 32 -38 -25 22 48 -25 50 0 -24 41 26 -26 31 55 46 0 0 -25 33 19 22 15 52 52 30 -37 -25 19 44 -25 46 56 -24 38 22 -26 28 50 47 0 0 -25 30 23 22 15 40 53 29 -37 -25 16 48 -25 44 1 -24 35 27 -26 25 54 48 0 0 -25 27 36 22 15 27 53 28 -37 -25 14 1 -25 41 13 -24 32 40 -26 23 6 49 0 0 -25 24 56 22 15 14 53 26 -36 -25 11 22 -25 38 33 -24 30 1 -26 20 26 50 0 0 -25 22 25 22 15 2 54 25 -36 -25 8 50 -25 36 2 -24 27 30 -26 17 54 51 0 0 -25 20 2 22 14 49 54 23 -36 -25 6 27 -25 33 38 -24 25 8 -26 15 30 52 0 0 -25 17 47 22 14 36 55 22 -35 -25 4 13 -25 31 23 -24 22 53 -26 13 15 53 0 0 -25 15 40 22 14 23 55 20 -35 -25 2 6 -25 29 17 -24 20 47 -26 11 8 54 0 0 -25 13 42 22 14 10 55 19 -34 -25 0 8 -25 27 18 -24 18 49 -26 9 9 55 0 0 -25 11 52 22 13 57 55 17 -34 -24 58 18 -25 25 28 -24 17 0 -26 7 19 56 0 0 -25 10 11 22 13 44 56 16 -33 -24 56 37 -25 23 47 -24 15 19 -26 5 37 57 0 0 -25 8 37 22 13 31 56 14 -33 -24 55 4 -25 22 13 -24 13 46 -26 4 3 58 0 0 -25 7 13 22 13 17 56 12 -32 -24 53 39 -25 20 49 -24 12 21 -26 2 38 59 0 0 -25 5 56 22 13 4 56 11 -32 -24 52 23 -25 19 32 -24 11 5 -26 1 22 60 0 0 -25 4 49 22 12 51 57 9 -31 -24 51 15 -25 18 24 -24 9 58 -26 0 14 61 0 0 -25 3 49 22 12 38 57 7 -31 -24 50 16 -25 17 25 -24 8 59 -25 59 14 62 0 0 -25 2 58 22 12 25 57 6 -30 -24 49 25 -25 16 34 -24 8 8 -25 58 23 63 0 0 -25 2 16 22 12 11 57 4 -30 -24 48 43 -25 15 52 -24 7 26 -25 57 41 64 0 0 -25 1 42 22 11 58 57 2 -29 -24 48 9 -25 15 18 -24 6 52 -25 57 7 65 0 0 -25 1 17 22 11 45 57 1 -29 -24 47 43 -25 14 52 -24 6 27 -25 56 41 66 0 0 -25 1 0 22 11 31 57 359 -28 -24 47 27 -25 14 36 -24 6 10 -25 56 24 67 0 0 -25 0 52 22 11 18 57 357 -27 -24 47 18 -25 14 27 -24 6 2 -25 56 16 68 0 0 -25 0 52 22 11 5 57 355 -27 -24 47 19 -25 14 28 -24 6 2 -25 56 16 69 0 0 -25 1 1 22 10 51 57 354 -26 -24 47 27 -25 14 36 -24 6 11 -25 56 25 70 0 0 -25 1 18 22 10 38 57 352 -26 -24 47 45 -25 14 54 -24 6 28 -25 56 43 71 0 0 -25 1 44 22 10 25 57 350 -25 -24 48 11 -25 15 20 -24 6 54 -25 57 9 72 0 0 -25 2 19 22 10 12 56 349 -24 -24 48 45 -25 15 54 -24 7 28 -25 57 43 73 0 0 -25 3 1 22 9 58 56 347 -24 -24 49 28 -25 16 37 -24 8 11 -25 58 26 74 0 0 -25 3 53 22 9 45 56 345 -23 -24 50 19 -25 17 29 -24 9 2 -25 59 18 75 0 0 -25 4 53 22 9 32 56 344 -22 -24 51 19 -25 18 29 -24 10 2 -26 0 18 76 0 0 -25 6 1 22 9 19 56 342 -22 -24 52 28 -25 19 37 -24 11 10 -26 1 27 77 0 0 -25 7 18 22 9 6 55 341 -21 -24 53 44 -25 20 54 -24 12 27 -26 2 44 78 0 0 -25 8 44 22 8 53 55 339 -20 -24 55 10 -25 22 20 -24 13 52 -26 4 10 79 0 0 -25 10 17 22 8 40 55 338 -20 -24 56 43 -25 23 53 -24 15 25 -26 5 44 80 0 0 -25 12 0 22 8 27 54 336 -19 -24 58 25 -25 25 36 -24 17 7 -26 7 26 81 0 0 -25 13 50 22 8 14 54 335 -18 -25 0 16 -25 27 26 -24 18 57 -26 9 18 82 0 0 -25 15 49 22 8 1 53 333 -18 -25 2 15 -25 29 26 -24 20 56 -26 11 17 83 0 0 -25 17 56 22 7 49 53 332 -17 -25 4 22 -25 31 33 -24 23 3 -26 13 25 84 0 0 -25 20 12 22 7 36 53 330 -16 -25 6 38 -25 33 49 -24 25 18 -26 15 41 85 0 0 -25 22 36 22 7 23 52 329 -15 -25 9 1 -25 36 13 -24 27 41 -26 18 5 86 0 0 -25 25 8 22 7 11 52 328 -15 -25 11 33 -25 38 45 -24 30 13 -26 20 38 87 0 0 -25 27 48 22 6 58 51 327 -14 -25 14 14 -25 41 26 -24 32 52 -26 23 19 88 0 0 -25 30 37 22 6 46 51 325 -13 -25 17 2 -25 44 14 -24 35 40 -26 26 8 89 0 0 -25 33 34 22 6 34 50 324 -12 -25 19 58 -25 47 11 -24 38 36 -26 29 5 90 0 0 -25 36 38 22 6 22 49 323 -12 -25 23 3 -25 50 16 -24 41 40 -26 32 11 91 0 0 -25 39 51 22 6 10 49 322 -11 -25 26 16 -25 53 29 -24 44 53 -26 35 24 92 0 0 -25 43 12 22 5 58 48 321 -10 -25 29 36 -25 56 50 -24 48 13 -26 38 46 93 0 0 -25 46 41 22 5 46 48 319 -9 -25 33 5 -26 0 19 -24 51 41 -26 42 15 94 0 0 -25 50 17 22 5 34 47 318 -9 -25 36 41 -26 3 56 -24 55 17 -26 45 53 95 0 0 -25 54 2 22 5 23 47 317 -8 -25 40 26 -26 7 40 -24 59 0 -26 49 38 96 0 0 -25 57 54 22 5 11 46 316 -7 -25 44 18 -26 11 33 -25 2 52 -26 53 31 97 0 0 -26 1 54 22 5 0 45 315 -6 -25 48 17 -26 15 33 -25 6 51 -26 57 32 98 0 0 -26 6 2 22 4 48 45 314 -6 -25 52 25 -26 19 41 -25 10 58 -27 1 41 99 0 0 -26 10 17 22 4 37 44 313 -5 -25 56 40 -26 23 56 -25 15 12 -27 5 57 100 0 0 -26 14 40 22 4 26 43 312 -4 -26 1 3 -26 28 20 -25 19 34 -27 10 20 101 0 0 -26 19 10 22 4 15 43 312 -3 -26 5 33 -26 32 50 -25 24 4 -27 14 52 102 0 0 -26 23 48 22 4 5 42 311 -2 -26 10 10 -26 37 28 -25 28 41 -27 19 30 103 0 0 -26 28 33 22 3 54 41 310 -2 -26 14 55 -26 42 13 -25 33 25 -27 24 17 104 0 0 -26 33 26 22 3 44 40 309 -1 -26 19 47 -26 47 6 -25 38 16 -27 29 10 Uncertainty in time = +/- 11 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0765-01263-1 * constellation : Canis Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 31 55.1838 DE: +08 04 51.071 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .043, .040 ) * V mag [mag]: 11.1 * B mag [mag]: 12.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (542) Susanna approx. diameter [km]: 42 approx. diameter ["]: .028 distance from Earth [AU]: 2.05300 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 826 number of rejected observations: 61 time covered by the observations: 1904 Aug 17 - 2007 Oct 09 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.015, 88° remarks: * orbital elements for (542) Susanna : Mean anomaly = 76.20847827 deg Arg. of pericenter = 214.77372749 deg Long. of node = 153.05998875 deg Inclination = 12.07586998 deg Eccentricity = 0.13883214 Semimajor axis = 2.90682991 AU Perihelion dist = 2.50326850 AU Mag: H = 9.26, G = 0.15 Epoch of elements : MJD 55170.92500000 TDT (2009 Dec 05.925) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 5 542 Susanna 22h 11.6m UT 11.1 7 31 55.184 8 4 51.07TYC 0765-01263-1 12.4 14.0 42 5.8 2.053 -1.167 -0.08 65.2358 8.080 -155.19 -22.47 22.1936 0.00310 -0.54330 -4.04123 -0.01960 -0.00359 0.00166 2000 76.024521200912 5.00000214.773727153.059989 12.0758700.13883214 2.9068299 2.5032685 9.4 5.00.15 RATE 1.9887250 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.051 0.043 89 2.53 0.043 0 54545.5020091205_1263-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 17:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org