IOTA/IOTA-ES occultation update for (455) Bruchsalia / TYC 4682-02550-1 event on 2009 Dec 06, 03:44 UT Visible from Summary ------- On 2009 Dec 06 UT, the 84 km diameter asteroid (455) Bruchsalia will occult a 11.1 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.5 mag to 12.2 mag (the magnitude of the asteroid) for at most 8.8 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: 94 * date and approx. time of event: 2009 Dec 06, 03:39 - 2009 Dec 06, 03:55 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 1.5 * estimated maximum duration [s]: 8.8 * Moon: 81 % sunlit, 109° distance * Sun: 122° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 86 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .043 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .044", .030", 71° ) * approx speed of asteroid's shadow [km/s]: 9.5556 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4682-02550-1 by 455 Bruchsalia on 2009 Dec 6 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 ' " Longitude Longitude Longitude Longitude - 55 16 11 82 0 0 3 55 24 1 239 -30 ... .. .. - 60 19 24 ... .. .. - 64 24 32 - 64 48 1 81 0 0 3 55 24 2 230 -31 - 60 47 56 - 68 30 25 - 56 51 20 - 71 38 56 Latitude Latitude Latitude Latitude - 66 0 0 80 50 20 3 55 23 3 229 -32 80 19 48 81 20 57 79 52 23 81 48 34 - 67 0 0 80 41 50 3 55 23 3 228 -32 80 10 51 81 12 54 79 43 2 81 40 56 - 68 0 0 80 32 55 3 55 23 3 227 -32 80 1 28 81 4 27 79 33 14 81 32 54 - 69 0 0 80 23 33 3 55 23 3 226 -32 79 51 37 80 55 34 79 22 57 81 24 28 - 70 0 0 80 13 42 3 55 23 3 225 -32 79 41 16 80 46 15 79 12 8 81 15 37 - 71 0 0 80 3 22 3 55 23 4 224 -32 79 30 23 80 36 26 79 0 47 81 6 18 - 72 0 0 79 52 29 3 55 23 4 223 -32 79 18 57 80 26 8 78 48 51 80 56 30 - 73 0 0 79 41 3 3 55 22 4 222 -33 79 6 55 80 15 17 78 36 18 80 46 12 - 74 0 0 79 29 0 3 55 22 4 221 -33 78 54 16 80 3 52 78 23 5 80 35 20 - 75 0 0 79 16 19 3 55 22 5 220 -33 78 40 56 79 51 50 78 9 11 80 23 54 - 76 0 0 79 2 57 3 55 22 5 219 -33 78 26 53 79 39 9 77 54 32 80 11 50 - 77 0 0 78 48 51 3 55 21 5 218 -33 78 12 4 79 25 46 77 39 5 79 59 6 - 78 0 0 78 33 58 3 55 21 6 217 -33 77 56 26 79 11 38 77 22 47 79 45 40 - 79 0 0 78 18 14 3 55 20 6 216 -34 77 39 56 78 56 42 77 5 34 79 31 27 - 80 0 0 78 1 36 3 55 20 6 215 -34 77 22 28 78 40 54 76 47 23 79 16 25 - 81 0 0 77 44 0 3 55 20 7 214 -34 77 4 0 78 24 11 76 28 8 79 0 29 - 82 0 0 77 25 21 3 55 19 7 213 -34 76 44 26 78 6 27 76 7 46 78 43 36 - 83 0 0 77 5 35 3 55 18 7 212 -34 76 23 42 77 47 39 75 46 10 78 25 42 - 84 0 0 76 44 35 3 55 18 8 211 -35 76 1 42 77 27 41 75 23 16 78 6 40 - 85 0 0 76 22 16 3 55 17 8 210 -35 75 38 19 77 6 27 74 58 56 77 46 25 - 86 0 0 75 58 31 3 55 16 9 209 -35 75 13 26 76 43 50 74 33 3 77 24 51 - 87 0 0 75 33 13 3 55 15 9 208 -35 74 46 57 76 19 45 74 5 31 77 1 51 - 88 0 0 75 6 13 3 55 14 10 207 -36 74 18 42 75 54 1 73 36 9 76 37 17 - 89 0 0 74 37 23 3 55 13 10 206 -36 73 48 32 75 26 31 73 4 50 76 11 1 - 90 0 0 74 6 32 3 55 12 11 205 -36 73 16 18 74 57 5 72 31 20 75 42 53 - 91 0 0 73 33 28 3 55 10 12 204 -36 72 41 46 74 25 32 71 55 30 75 12 42 - 92 0 0 72 58 0 3 55 9 12 203 -37 72 4 44 73 51 38 71 17 6 74 40 16 - 93 0 0 72 19 52 3 55 7 13 202 -37 71 24 58 73 15 11 70 35 53 74 5 21 - 94 0 0 71 38 50 3 55 5 14 201 -37 70 42 12 72 35 55 69 51 35 73 27 42 - 95 0 0 70 54 35 3 55 3 15 200 -38 69 56 7 71 53 32 69 3 54 72 47 2 - 96 0 0 70 6 48 3 55 0 15 199 -38 69 6 25 71 7 43 68 12 29 72 3 2 - 97 0 0 69 15 6 3 54 57 16 198 -38 68 12 41 70 18 6 67 16 58 71 15 20 - 98 0 0 68 19 6 3 54 53 17 197 -39 67 14 32 69 24 17 66 16 57 70 23 32 - 99 0 0 67 18 18 3 54 49 18 196 -39 66 11 31 68 25 47 65 11 57 69 27 10 -100 0 0 66 12 14 3 54 45 20 195 -40 65 3 6 67 22 7 64 1 29 68 25 43 -101 0 0 65 0 19 3 54 40 21 194 -40 63 48 44 66 12 43 62 44 58 67 18 39 -102 0 0 63 41 56 3 54 34 22 193 -41 62 27 49 64 56 57 61 21 50 66 5 19 -103 0 0 62 16 25 3 54 27 24 192 -41 60 59 41 63 34 8 59 51 25 64 45 1 -104 0 0 60 43 3 3 54 19 25 191 -42 59 23 39 62 3 33 58 13 1 63 17 1 -105 0 0 59 1 5 3 54 9 27 190 -42 57 38 57 60 24 24 56 25 56 61 40 30 -106 0 0 57 9 43 3 53 58 29 189 -42 55 44 50 58 35 52 54 29 26 59 54 37 -107 0 0 55 8 10 3 53 46 31 188 -43 53 40 34 56 37 8 52 22 49 57 58 30 -108 0 0 52 55 41 3 53 31 33 187 -43 51 25 28 54 27 23 50 5 25 55 51 19 -109 0 0 50 31 36 3 53 14 36 186 -43 48 58 54 52 5 54 47 36 41 53 32 17 -110 0 0 47 55 25 3 52 55 39 185 -43 46 20 26 49 32 6 44 56 16 51 0 42 -111 0 0 45 6 51 3 52 33 41 184 -43 43 29 53 46 45 36 42 4 0 48 16 10 -112 0 0 42 5 56 3 52 8 44 182 -43 40 27 22 43 46 22 39 0 7 45 18 31 -113 0 0 38 53 6 3 51 39 48 181 -42 37 13 26 40 34 44 35 45 14 42 8 2 -114 0 0 35 29 17 3 51 8 51 179 -42 33 49 3 37 11 32 32 20 23 38 45 27 -115 0 0 31 55 55 3 50 33 55 177 -41 30 15 43 33 38 9 28 47 8 35 12 4 -116 0 0 28 14 55 3 49 55 58 175 -39 26 35 25 29 56 28 25 7 28 31 29 46 -117 0 0 24 28 38 3 49 15 62 172 -38 22 50 28 26 8 49 21 23 43 27 40 53 -118 0 0 20 39 39 3 48 33 65 168 -36 19 3 26 22 17 51 17 38 23 23 48 5 -119 0 0 16 50 40 3 47 49 69 162 -34 15 16 54 18 26 20 13 54 1 19 54 13 -120 0 0 13 4 13 3 47 5 72 155 -32 11 33 19 14 36 55 10 12 57 16 2 3 -121 0 0 9 22 33 3 46 21 74 146 -29 7 54 49 10 51 59 6 37 13 12 14 4 -122 0 0 5 47 32 3 45 38 76 133 -27 4 23 8 7 13 31 3 8 26 8 32 21 -123 0 0 2 20 32 3 44 56 77 118 -24 0 59 32 3 42 59 - 0 12 12 4 58 32 -124 0 0 - 0 57 29 3 44 15 77 102 -22 - 2 15 6 0 21 28 - 3 23 54 1 33 44 -125 0 0 - 4 5 59 3 43 37 77 88 -20 - 5 20 18 - 2 50 28 - 6 26 13 - 1 41 23 -126 0 0 - 7 4 45 3 43 0 75 77 -17 - 8 15 54 - 5 52 30 - 9 19 3 - 4 46 29 -127 0 0 - 9 53 47 3 42 25 73 69 -15 -11 1 55 - 8 44 40 -12 2 27 - 7 41 34 -128 0 0 -12 33 20 3 41 53 71 63 -13 -13 38 38 -11 27 9 -14 36 41 -10 26 47 -129 0 0 -15 3 44 3 41 22 69 59 -11 -16 6 22 -14 0 18 -17 2 5 -13 2 29 -130 0 0 -17 25 23 3 40 54 67 56 -9 -18 25 32 -16 24 31 -19 19 5 -15 29 6 -131 0 0 -19 38 47 3 40 27 65 54 -7 -20 36 37 -18 40 18 -21 28 9 -17 47 5 -132 0 0 -21 44 24 3 40 2 62 52 -5 -22 40 5 -20 48 8 -23 29 43 -19 56 58 -133 0 0 -23 42 42 3 39 39 60 51 -3 -24 36 23 -22 48 30 -25 24 16 -21 59 15 -134 0 0 -25 34 11 3 39 18 59 50 -1 -26 26 0 -24 41 54 -27 12 15 -23 54 24 Uncertainty in time = +/- 5 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 4682-02550-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 16 57.5387 DE: -03 36 11.707 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .026 ) * V mag [mag]: 11.1 * B mag [mag]: 11.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (455) Bruchsalia approx. diameter [km]: 84 approx. diameter ["]: .086 distance from Earth [AU]: 1.35000 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 718 number of rejected observations: 109 time covered by the observations: 1900 May 22 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.037, 0.015, 62° remarks: * orbital elements for (455) Bruchsalia : Mean anomaly = 28.36638936 deg Arg. of pericenter = 272.14304770 deg Long. of node = 76.59185919 deg Inclination = 12.01962075 deg Eccentricity = 0.29436591 Semimajor axis = 2.65510365 AU Perihelion dist = 1.87353164 AU Mag: H = 8.75, G = 0.15 Epoch of elements : MJD 55171.15600000 TDT (2009 Dec 06.156) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 6 455 Bruchsalia 3h 44.6m UT 11.1 1 16 57.539- 3 36 11.71TYC 4682-02550-1 11.5 12.2 84 8.8 1.350 0.779 33.15 -111.9711 -3.612 121.60 -22.50 3.7428 -0.20268 0.07041 1.78651 5.08899 0.00406 0.00228 2000 28.103035200912 5.00000272.143048 76.591859 12.0196210.29436591 2.6551037 1.8735316 8.9 5.00.15 RATE 2.2781480 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.044 0.030 71 1.45 0.039 0 54545.5020091206_2550-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 17:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org