IOTA/IOTA-ES occultation update for (234) Barbara / HIP 34106 event on 2009 Nov 21, 03:24 UT Visible from Summary ------- On 2009 Nov 21 UT, the 44 km diameter asteroid (234) Barbara will occult a 7.5 mag star in the constellation Monoceros for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 13.1 mag (the magnitude of the asteroid) for at most 8.2 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: . The event at a glimpse ---------------------- * Rank: 94 * date and approx. time of event: 2009 Nov 21, 03:11 - 2009 Nov 21, 03:39 UT * magnitude of target star: 7.5 * magnitude drop [mag]: 5.6 * estimated maximum duration [s]: 8.2 * Moon: 18 % sunlit, 160° distance * Sun: 129° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.46 * 1 sigma uncertainty interval [seconds]: +/- 5.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .022 +/- .016) * 1 sigma uncertainty ellipse (major, minor, PA): ( .022", .016", 82° ) * approx speed of asteroid's shadow [km/s]: 5.3638 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 34106 by 234 Barbara on 2009 Nov 21 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 -100 0 0 25 46 3 3 39 37 1 86 -51 26 2 32 25 29 40 26 17 45 .. .. .. - 99 0 0 25 50 50 3 39 37 2 86 -52 26 7 19 25 34 26 26 22 32 25 19 25 - 98 0 0 25 56 1 3 39 36 3 87 -53 26 12 30 25 39 37 26 27 43 25 24 35 - 97 0 0 26 1 35 3 39 34 4 87 -54 26 18 4 25 45 10 26 33 18 25 30 8 - 96 0 0 26 7 31 3 39 33 4 88 -55 26 24 1 25 51 6 26 39 15 25 36 4 - 95 0 0 26 13 51 3 39 30 5 88 -56 26 30 21 25 57 25 26 45 36 25 42 23 - 94 0 0 26 20 33 3 39 28 6 89 -57 26 37 4 26 4 7 26 52 19 25 49 4 - 93 0 0 26 27 38 3 39 25 7 89 -58 26 44 9 26 11 11 26 59 25 25 56 7 - 92 0 0 26 35 4 3 39 22 8 89 -58 26 51 36 26 18 37 27 6 52 26 3 33 - 91 0 0 26 42 53 3 39 18 9 90 -59 26 59 25 26 26 25 27 14 42 26 11 20 - 90 0 0 26 51 2 3 39 14 10 90 -60 27 7 36 26 34 34 27 22 53 26 19 28 - 89 0 0 26 59 34 3 39 9 11 91 -61 27 16 8 26 43 4 27 31 26 26 27 58 - 88 0 0 27 8 26 3 39 4 11 91 -62 27 25 1 26 51 56 27 40 20 26 36 49 - 87 0 0 27 17 39 3 38 59 12 92 -63 27 34 15 27 1 8 27 49 35 26 46 1 - 86 0 0 27 27 13 3 38 54 13 92 -64 27 43 49 27 10 41 27 59 10 26 55 33 - 85 0 0 27 37 7 3 38 48 14 93 -64 27 53 44 27 20 34 28 9 6 27 5 25 - 84 0 0 27 47 21 3 38 41 15 93 -65 28 3 59 27 30 47 28 19 22 27 15 37 - 83 0 0 27 57 55 3 38 35 16 94 -66 28 14 34 27 41 20 28 29 57 27 26 9 - 82 0 0 28 8 48 3 38 28 17 94 -67 28 25 28 27 52 12 28 40 52 27 37 0 - 81 0 0 28 20 0 3 38 21 17 95 -67 28 36 41 28 3 23 28 52 7 27 48 10 - 80 0 0 28 31 31 3 38 13 18 95 -68 28 48 13 28 14 53 29 3 40 27 59 39 - 79 0 0 28 43 20 3 38 5 19 96 -69 29 0 4 28 26 41 29 15 32 28 11 26 - 78 0 0 28 55 28 3 37 57 20 97 -70 29 12 13 28 38 48 29 27 42 28 23 31 - 77 0 0 29 7 53 3 37 48 21 97 -70 29 24 40 28 51 12 29 40 10 28 35 55 - 76 0 0 29 20 37 3 37 39 22 98 -71 29 37 24 29 3 54 29 52 55 28 48 35 - 75 0 0 29 33 37 3 37 30 22 98 -72 29 50 26 29 16 53 30 5 58 29 1 33 - 74 0 0 29 46 54 3 37 20 23 99 -72 30 3 44 29 30 9 30 19 18 29 14 48 - 73 0 0 30 0 28 3 37 10 24 100 -73 30 17 20 29 43 41 30 32 55 29 28 19 - 72 0 0 30 14 18 3 37 0 25 100 -73 30 31 11 29 57 30 30 46 47 29 42 7 - 71 0 0 30 28 24 3 36 50 25 101 -74 30 45 19 30 11 35 31 0 56 29 56 10 - 70 0 0 30 42 46 3 36 39 26 102 -74 30 59 42 30 25 55 31 15 21 30 10 29 - 69 0 0 30 57 23 3 36 28 27 102 -75 31 14 20 30 40 31 31 30 1 30 25 3 - 68 0 0 31 12 15 3 36 17 28 103 -75 31 29 14 30 55 21 31 44 55 30 39 52 - 67 0 0 31 27 21 3 36 5 28 104 -76 31 44 21 31 10 26 32 0 4 30 54 56 - 66 0 0 31 42 42 3 35 54 29 104 -76 31 59 43 31 25 45 32 15 28 31 10 13 - 65 0 0 31 58 16 3 35 42 30 105 -76 32 15 19 31 41 17 32 31 5 31 25 45 - 64 0 0 32 14 3 3 35 30 31 106 -76 32 31 8 31 57 4 32 46 56 31 41 29 - 63 0 0 32 30 4 3 35 17 31 107 -76 32 47 11 32 13 3 33 3 0 31 57 27 - 62 0 0 32 46 18 3 35 4 32 108 -76 33 3 26 32 29 15 33 19 16 32 13 38 - 61 0 0 33 2 43 3 34 52 33 108 -76 33 19 53 32 45 39 33 35 45 32 30 0 - 60 0 0 33 19 21 3 34 39 33 109 -76 33 36 33 33 2 15 33 52 26 32 46 35 - 59 0 0 33 36 10 3 34 25 34 110 -76 33 53 23 33 19 2 34 9 18 33 3 21 - 58 0 0 33 53 11 3 34 12 35 111 -76 34 10 25 33 36 1 34 26 22 33 20 18 - 57 0 0 34 10 22 3 33 58 35 112 -76 34 27 38 33 53 11 34 43 36 33 37 26 - 56 0 0 34 27 43 3 33 44 36 113 -75 34 45 1 34 10 31 35 1 1 33 54 45 - 55 0 0 34 45 15 3 33 30 36 114 -75 35 2 34 34 28 0 35 18 36 34 12 13 - 54 0 0 35 2 56 3 33 16 37 115 -75 35 20 17 34 45 40 35 36 20 34 29 51 - 53 0 0 35 20 46 3 33 2 38 116 -74 35 38 9 35 3 28 35 54 13 34 47 38 - 52 0 0 35 38 45 3 32 48 38 117 -74 35 56 9 35 21 25 36 12 15 35 5 34 - 51 0 0 35 56 52 3 32 33 39 118 -73 36 14 18 35 39 31 36 30 26 35 23 38 - 50 0 0 36 15 7 3 32 18 39 119 -73 36 32 35 35 57 44 36 48 44 35 41 50 - 49 0 0 36 33 30 3 32 3 40 120 -72 36 50 59 36 16 5 37 7 10 36 0 9 - 48 0 0 36 51 59 3 31 48 40 121 -71 37 9 30 36 34 33 37 25 42 36 18 36 - 47 0 0 37 10 36 3 31 33 41 122 -71 37 28 8 36 53 8 37 44 22 36 37 9 - 46 0 0 37 29 18 3 31 18 41 123 -70 37 46 52 37 11 49 38 3 7 36 55 49 - 45 0 0 37 48 6 3 31 3 42 124 -70 38 5 42 37 30 36 38 21 59 37 14 34 - 44 0 0 38 7 0 3 30 48 42 126 -69 38 24 38 37 49 28 38 40 56 37 33 25 - 43 0 0 38 25 59 3 30 32 42 127 -68 38 43 38 38 8 25 38 59 57 37 52 21 - 42 0 0 38 45 2 3 30 17 43 128 -68 39 2 43 38 27 27 39 19 4 38 11 21 - 41 0 0 39 4 9 3 30 1 43 129 -67 39 21 52 38 46 33 39 38 14 38 30 26 - 40 0 0 39 23 20 3 29 46 43 131 -66 39 41 4 39 5 43 39 57 28 38 49 34 - 39 0 0 39 42 35 3 29 30 44 132 -65 40 0 20 39 24 55 40 16 45 39 8 46 - 38 0 0 40 1 52 3 29 15 44 133 -65 40 19 38 39 44 11 40 36 4 39 28 0 - 37 0 0 40 21 11 3 28 59 44 134 -64 40 38 59 40 3 29 40 55 26 39 47 17 - 36 0 0 40 40 33 3 28 43 45 136 -63 40 58 22 40 22 49 41 14 50 40 6 36 - 35 0 0 40 59 56 3 28 27 45 137 -63 41 17 46 40 42 11 41 34 16 40 25 56 - 34 0 0 41 19 20 3 28 12 45 138 -62 41 37 11 41 1 34 41 53 42 40 45 18 - 33 0 0 41 38 44 3 27 56 45 140 -61 41 56 37 41 20 57 42 13 10 41 4 41 - 32 0 0 41 58 9 3 27 40 46 141 -60 42 16 3 41 40 21 42 32 37 41 24 3 - 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53 55 31 12 0 0 54 43 26 3 17 39 38 200 -30 55 1 15 54 25 42 55 17 44 54 9 29 13 0 0 54 57 9 3 17 29 37 201 -30 55 14 56 54 39 26 55 31 24 54 23 14 14 0 0 55 10 39 3 17 19 37 202 -29 55 28 25 54 52 58 55 44 51 54 36 47 15 0 0 55 23 56 3 17 8 37 203 -29 55 41 41 55 6 17 55 58 6 54 50 7 16 0 0 55 37 0 3 16 58 36 204 -28 55 54 44 55 19 22 56 11 7 55 3 14 17 0 0 55 49 51 3 16 49 36 205 -28 56 7 33 55 32 15 56 23 55 55 16 8 18 0 0 56 2 30 3 16 39 35 206 -27 56 20 10 55 44 55 56 36 31 55 28 49 19 0 0 56 14 55 3 16 30 35 207 -27 56 32 34 55 57 22 56 48 53 55 41 17 20 0 0 56 27 7 3 16 20 34 208 -26 56 44 44 56 9 35 57 1 1 55 53 32 21 0 0 56 39 6 3 16 11 34 210 -25 56 56 41 56 21 36 57 12 57 56 5 34 22 0 0 56 50 51 3 16 2 34 211 -25 57 8 25 56 33 23 57 24 39 56 17 23 23 0 0 57 2 23 3 15 53 33 212 -24 57 19 55 56 44 56 57 36 8 56 28 58 24 0 0 57 13 42 3 15 45 33 213 -24 57 31 13 56 56 17 57 47 24 56 40 20 25 0 0 57 24 48 3 15 36 32 214 -23 57 42 16 57 7 24 57 58 26 56 51 29 26 0 0 57 35 40 3 15 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26 60 17 11 59 11 53 41 0 0 59 51 55 3 13 40 25 229 -16 60 8 56 59 34 59 60 24 40 59 19 28 42 0 0 59 59 14 3 13 33 25 230 -15 60 16 13 59 42 19 60 31 55 59 26 50 43 0 0 60 6 19 3 13 27 24 231 -15 60 23 17 59 49 26 60 38 58 59 33 58 44 0 0 60 13 11 3 13 22 24 232 -14 60 30 7 59 56 20 60 45 47 59 40 54 45 0 0 60 19 50 3 13 16 23 233 -14 60 36 45 60 3 1 60 52 23 59 47 36 46 0 0 60 26 16 3 13 10 23 234 -13 60 43 10 60 9 28 60 58 46 59 54 5 47 0 0 60 32 29 3 13 5 22 235 -13 60 49 21 60 15 43 61 4 56 60 0 21 48 0 0 60 38 29 3 13 0 22 236 -13 60 55 20 60 21 44 61 10 53 60 6 23 49 0 0 60 44 16 3 12 54 22 237 -12 61 1 5 60 27 33 61 16 37 60 12 13 50 0 0 60 49 51 3 12 49 21 238 -12 61 6 38 60 33 8 61 22 9 60 17 50 51 0 0 60 55 12 3 12 44 21 239 -11 61 11 58 60 38 31 61 27 27 60 23 14 52 0 0 61 0 20 3 12 40 20 240 -11 61 17 4 60 43 40 61 32 33 60 28 24 53 0 0 61 5 15 3 12 35 20 241 -10 61 21 59 60 48 37 61 37 26 60 33 22 54 0 0 61 9 58 3 12 30 19 241 -10 61 26 40 60 53 21 61 42 6 60 38 7 55 0 0 61 14 28 3 12 26 19 242 -10 61 31 8 60 57 52 61 46 33 60 42 39 56 0 0 61 18 45 3 12 21 18 243 -9 61 35 24 61 2 10 61 50 48 60 46 59 57 0 0 61 22 49 3 12 17 18 244 -9 61 39 27 61 6 15 61 54 50 60 51 5 58 0 0 61 26 41 3 12 13 17 245 -8 61 43 18 61 10 8 61 58 39 60 54 59 59 0 0 61 30 19 3 12 9 17 246 -8 61 46 56 61 13 48 62 2 16 60 58 40 60 0 0 61 33 46 3 12 5 17 247 -8 61 50 21 61 17 15 62 5 40 61 2 8 61 0 0 61 36 59 3 12 1 16 248 -7 61 53 33 61 20 30 62 8 52 61 5 23 62 0 0 61 40 0 3 11 58 16 249 -7 61 56 33 61 23 32 62 11 51 61 8 26 63 0 0 61 42 48 3 11 54 15 250 -7 61 59 21 61 26 21 62 14 38 61 11 16 64 0 0 61 45 24 3 11 50 15 250 -6 62 1 56 61 28 57 62 17 12 61 13 53 65 0 0 61 47 47 3 11 47 14 251 -6 62 4 18 61 31 21 62 19 33 61 16 18 66 0 0 61 49 58 3 11 44 14 252 -5 62 6 28 61 33 33 62 21 43 61 18 30 67 0 0 61 51 56 3 11 41 13 253 -5 62 8 25 61 35 31 62 23 39 61 20 29 68 0 0 61 53 41 3 11 38 13 254 -5 62 10 10 61 37 17 62 25 24 61 22 16 69 0 0 61 55 14 3 11 35 12 255 -4 62 11 42 61 38 51 62 26 55 61 23 50 70 0 0 61 56 35 3 11 32 12 256 -4 62 13 2 61 40 12 62 28 15 61 25 11 71 0 0 61 57 43 3 11 29 12 257 -4 62 14 10 61 41 20 62 29 22 61 26 20 72 0 0 61 58 38 3 11 27 11 258 -3 62 15 4 61 42 16 62 30 16 61 27 16 73 0 0 61 59 21 3 11 24 11 259 -3 62 15 47 61 42 59 62 30 58 61 28 0 74 0 0 61 59 51 3 11 22 10 259 -2 62 16 17 61 43 30 62 31 28 61 28 31 75 0 0 62 0 8 3 11 19 10 260 -2 62 16 34 61 43 47 62 31 45 61 28 49 76 0 0 62 0 13 3 11 17 9 261 -2 62 16 39 61 43 53 62 31 49 61 28 54 77 0 0 62 0 6 3 11 15 9 262 -1 62 16 31 61 43 45 62 31 41 61 28 47 78 0 0 61 59 46 3 11 13 8 263 -1 62 16 11 61 43 25 62 31 21 61 28 27 79 0 0 61 59 13 3 11 11 8 264 -1 62 15 38 61 42 52 62 30 48 61 27 54 80 0 0 61 58 27 3 11 9 7 265 0 62 14 52 61 42 7 62 30 2 61 27 9 81 0 0 61 57 29 3 11 8 7 266 0 62 13 54 61 41 9 62 29 4 61 26 10 Uncertainty in time = +/- 5 secs Prediction of 2009 Aug 7.0 Data for the target star ------------------------ * name: HIP 34106 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 04 19.5883 DE: +04 01 26.611 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .012, .009 ) * V mag [mag]: 7.5 * B mag [mag]: 8.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (234) Barbara approx. diameter [km]: 44 approx. diameter ["]: .035 distance from Earth [AU]: 1.71700 * orbital information: orbit source: Preston date of fit: 2009 Aug 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 955 number of rejected observations: 101 time covered by the observations: 1916 Jun 07 - 2008 Sep 18 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.013, 78° remarks: * orbital elements for (234) Barbara : Mean anomaly = 83.81810527 deg Arg. of pericenter = 192.05373464 deg Long. of node = 144.62532316 deg Inclination = 15.35710136 deg Eccentricity = 0.24422576 Semimajor axis = 2.38593567 AU Perihelion dist = 1.80322872 AU Mag: H = 8.99, G = 0.15 Epoch of elements : MJD 55156.14200000 TDT (2009 Nov 21.142) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 21 234 Barbara 3h 25.3m UT 7.5 7 4 19.588 4 1 26.61HIP 34106 8.4 13.1 44 8.2 1.717 -0.988 -4.74 -5.5075 4.026 125.14 -19.93 3.4213 -0.21176 0.65385 -2.88187 -0.92766 -0.00413 0.00172 2000 82.17552820091115.00000192.053735144.625323 15.3571010.24422576 2.3859357 1.8032287 9.0 5.00.15 RATE 2.6743360 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.022 0.016 82 1.46 0.016 1 21 24 55050.0020091121__34106 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Aug 07, 05:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org