IOTA/IOTA-ES occultation update for (776) Berbericia / TYC 7986-00013-1 event on 2012 Sep 07, 22:11 UT Visible from Africa Summary ------- On 2012 Sep 07 UT, the 150 km diameter asteroid (776) Berbericia will occult a 10.9 mag star in the constellation Grus for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.1 mag to 11.6 mag (the magnitude of the asteroid) for at most 19.0 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: 99 * date and approx. time of event: 2012 Sep 07, 21:59 - 2012 Sep 07, 22:22 UT * geocentric midpoint of event [JD]: 2456178.42446667 * magnitude of target star: 10.9 * magnitude drop [mag]: 1.1 * estimated maximum duration [s]: 19.0 * Moon: 56 % sunlit, 109° distance * Sun: 142° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 173 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .038", .030", 86° ) * approx speed of asteroid's shadow [km/s]: 7.9012 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7986-00013-1 by 776 Berbericia on 2012 Sep 7 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 - 64 0 0 14 56 35 22 22 49 5 134 -1 16 0 23 13 53 44 16 32 39 13 22 39 - 63 0 0 14 6 34 22 22 47 6 134 -2 15 9 49 13 4 13 15 41 49 12 33 23 - 62 0 0 13 17 19 22 22 44 8 134 -3 14 20 3 12 15 29 14 51 46 11 44 53 - 61 0 0 12 28 52 22 22 41 9 135 -4 13 31 4 11 27 32 14 2 32 10 57 10 - 60 0 0 11 41 13 22 22 38 10 135 -5 12 42 55 10 40 23 13 14 6 10 10 16 - 59 0 0 10 54 24 22 22 34 11 135 -6 11 55 35 9 54 3 12 26 31 9 24 10 - 58 0 0 10 8 25 22 22 30 13 135 -7 11 9 6 9 8 33 11 39 46 8 38 54 - 57 0 0 9 23 17 22 22 26 14 136 -8 10 23 29 8 23 53 10 53 53 7 54 28 - 56 0 0 8 39 1 22 22 21 15 136 -9 9 38 43 7 40 5 10 8 53 7 10 54 - 55 0 0 7 55 36 22 22 15 16 136 -10 8 54 50 6 57 8 9 24 45 6 28 10 - 54 0 0 7 13 4 22 22 10 17 136 -11 8 11 50 6 15 3 8 41 30 5 46 18 - 53 0 0 6 31 25 22 22 4 19 136 -12 7 29 43 5 33 50 7 59 9 5 5 18 - 52 0 0 5 50 38 22 21 58 20 137 -13 6 48 29 4 53 29 7 17 42 4 25 10 - 51 0 0 5 10 45 22 21 51 21 137 -14 6 8 9 4 14 1 6 37 8 3 45 54 - 50 0 0 4 31 44 22 21 44 22 137 -15 5 28 43 3 35 25 5 57 29 3 7 31 - 49 0 0 3 53 37 22 21 37 23 137 -16 4 50 11 2 57 42 5 18 43 2 29 59 - 48 0 0 3 16 23 22 21 29 24 137 -17 4 12 32 2 20 52 4 40 52 1 53 20 - 47 0 0 2 40 1 22 21 22 25 137 -19 3 35 47 1 44 54 4 3 54 1 17 34 - 46 0 0 2 4 33 22 21 14 26 138 -20 2 59 55 1 9 48 3 27 51 0 42 39 - 45 0 0 1 29 58 22 21 5 27 138 -21 2 24 57 0 35 35 2 52 41 0 8 36 - 44 0 0 0 56 15 22 20 57 29 138 -22 1 50 52 0 2 14 2 18 24 - 0 24 34 - 43 0 0 0 23 25 22 20 48 30 138 -23 1 17 40 - 0 30 16 1 45 1 - 0 56 54 - 42 0 0 - 0 8 34 22 20 39 31 138 -24 0 45 21 - 1 1 54 1 12 31 - 1 28 22 - 41 0 0 - 0 39 40 22 20 30 32 139 -25 0 13 54 - 1 32 40 0 40 54 - 1 58 59 - 40 0 0 - 1 9 55 22 20 21 33 139 -26 - 0 16 41 - 2 2 36 0 10 9 - 2 28 45 - 39 0 0 - 1 39 18 22 20 11 34 139 -27 - 0 46 23 - 2 31 41 - 0 19 43 - 2 57 41 - 38 0 0 - 2 7 51 22 20 1 35 139 -28 - 1 15 14 - 2 59 55 - 0 48 44 - 3 25 46 - 37 0 0 - 2 35 32 22 19 51 36 140 -29 - 1 43 14 - 3 27 19 - 1 16 53 - 3 53 2 - 36 0 0 - 3 2 24 22 19 41 37 140 -30 - 2 10 23 - 3 53 54 - 1 44 11 - 4 19 28 - 35 0 0 - 3 28 25 22 19 31 37 140 -31 - 2 36 41 - 4 19 39 - 2 10 38 - 4 45 5 - 34 0 0 - 3 53 37 22 19 21 38 141 -32 - 3 2 9 - 4 44 35 - 2 36 14 - 5 9 53 - 33 0 0 - 4 17 59 22 19 10 39 141 -33 - 3 26 48 - 5 8 42 - 3 1 0 - 5 33 53 - 32 0 0 - 4 41 33 22 18 59 40 141 -34 - 3 50 37 - 5 32 1 - 3 24 57 - 5 57 5 - 31 0 0 - 5 4 18 22 18 48 41 142 -35 - 4 13 36 - 5 54 32 - 3 48 4 - 6 19 28 - 30 0 0 - 5 26 15 22 18 37 42 142 -36 - 4 35 47 - 6 16 15 - 4 10 23 - 6 41 5 - 29 0 0 - 5 47 24 22 18 26 43 142 -36 - 4 57 10 - 6 37 10 - 4 31 52 - 7 1 54 - 28 0 0 - 6 7 45 22 18 15 44 143 -37 - 5 17 44 - 6 57 19 - 4 52 33 - 7 21 56 - 27 0 0 - 6 27 20 22 18 4 45 143 -38 - 5 37 31 - 7 16 41 - 5 12 27 - 7 41 13 - 26 0 0 - 6 46 7 22 17 52 45 144 -39 - 5 56 31 - 7 35 17 - 5 31 33 - 7 59 43 - 25 0 0 - 7 4 8 22 17 41 46 144 -40 - 6 14 43 - 7 53 7 - 5 49 51 - 8 17 27 - 24 0 0 - 7 21 23 22 17 29 47 145 -41 - 6 32 9 - 8 10 11 - 6 7 23 - 8 34 26 - 23 0 0 - 7 37 52 22 17 17 48 145 -42 - 6 48 49 - 8 26 30 - 6 24 8 - 8 50 39 - 22 0 0 - 7 53 36 22 17 6 48 146 -43 - 7 4 43 - 8 42 3 - 6 40 6 - 9 6 8 - 21 0 0 - 8 8 34 22 16 54 49 146 -44 - 7 19 50 - 8 56 52 - 6 55 19 - 9 20 53 - 20 0 0 - 8 22 47 22 16 42 50 147 -45 - 7 34 13 - 9 10 57 - 7 9 46 - 9 34 53 - 19 0 0 - 8 36 16 22 16 30 51 148 -46 - 7 47 50 - 9 24 17 - 7 23 28 - 9 48 9 - 18 0 0 - 8 49 0 22 16 17 51 148 -47 - 8 0 43 - 9 36 54 - 7 36 24 -10 0 42 - 17 0 0 - 9 1 0 22 16 5 52 149 -48 - 8 12 51 - 9 48 47 - 7 48 36 -10 12 31 - 16 0 0 - 9 12 17 22 15 53 53 150 -49 - 8 24 14 - 9 59 56 - 8 0 3 -10 23 37 - 15 0 0 - 9 22 50 22 15 41 53 151 -50 - 8 34 53 -10 10 22 - 8 10 46 -10 34 0 - 14 0 0 - 9 32 39 22 15 28 54 152 -51 - 8 44 49 -10 20 5 - 8 20 45 -10 43 40 - 13 0 0 - 9 41 45 22 15 16 54 152 -52 - 8 54 1 -10 29 6 - 8 30 0 -10 52 38 - 12 0 0 - 9 50 8 22 15 3 55 153 -52 - 9 2 29 -10 37 23 - 8 38 31 -11 0 53 - 11 0 0 - 9 57 48 22 14 51 55 154 -53 - 9 10 14 -10 44 59 - 8 46 18 -11 8 26 - 10 0 0 -10 4 46 22 14 38 56 155 -54 - 9 17 16 -10 51 52 - 8 53 23 -11 15 17 - 9 0 0 -10 11 1 22 14 25 56 156 -55 - 9 23 35 -10 58 3 - 8 59 44 -11 21 26 - 8 0 0 -10 16 33 22 14 13 57 157 -56 - 9 29 12 -11 3 32 - 9 5 22 -11 26 54 - 7 0 0 -10 21 24 22 14 0 57 159 -57 - 9 34 5 -11 8 20 - 9 10 17 -11 31 39 - 6 0 0 -10 25 32 22 13 47 58 160 -58 - 9 38 16 -11 12 25 - 9 14 29 -11 35 44 - 5 0 0 -10 28 58 22 13 34 58 161 -59 - 9 41 44 -11 15 49 - 9 17 59 -11 39 7 - 4 0 0 -10 31 42 22 13 21 58 162 -60 - 9 44 31 -11 18 32 - 9 20 46 -11 41 48 - 3 0 0 -10 33 45 22 13 8 59 163 -61 - 9 46 34 -11 20 33 - 9 22 50 -11 43 49 - 2 0 0 -10 35 5 22 12 55 59 165 -62 - 9 47 56 -11 21 52 - 9 24 12 -11 45 8 - 1 0 0 -10 35 44 22 12 42 59 166 -63 - 9 48 35 -11 22 31 - 9 24 52 -11 45 46 0 0 0 -10 35 41 22 12 29 59 167 -64 - 9 48 32 -11 22 28 - 9 24 49 -11 45 43 1 0 0 -10 34 57 22 12 16 60 169 -64 - 9 47 47 -11 21 43 - 9 24 4 -11 44 59 2 0 0 -10 33 30 22 12 3 60 170 -65 - 9 46 20 -11 20 18 - 9 22 36 -11 43 33 3 0 0 -10 31 22 22 11 50 60 172 -66 - 9 44 11 -11 18 11 - 9 20 26 -11 41 27 4 0 0 -10 28 32 22 11 37 60 173 -67 - 9 41 19 -11 15 22 - 9 17 34 -11 38 40 5 0 0 -10 25 0 22 11 24 60 174 -68 - 9 37 45 -11 11 53 - 9 13 59 -11 35 11 6 0 0 -10 20 47 22 11 11 60 176 -69 - 9 33 29 -11 7 41 - 9 9 42 -11 31 1 7 0 0 -10 15 51 22 10 58 60 177 -70 - 9 28 31 -11 2 49 - 9 4 42 -11 26 9 8 0 0 -10 10 13 22 10 45 60 179 -71 - 9 22 50 -10 57 14 - 8 58 59 -11 20 37 9 0 0 -10 3 54 22 10 31 60 180 -72 - 9 16 26 -10 50 58 - 8 52 33 -11 14 23 10 0 0 - 9 56 52 22 10 18 60 182 -73 - 9 9 20 -10 44 1 - 8 45 25 -11 7 27 11 0 0 - 9 49 7 22 10 5 59 183 -74 - 9 1 31 -10 36 21 - 8 37 34 -10 59 49 12 0 0 - 9 40 40 22 9 52 59 184 -75 - 8 52 59 -10 27 59 - 8 28 59 -10 51 30 13 0 0 - 9 31 31 22 9 39 59 186 -76 - 8 43 44 -10 18 55 - 8 19 41 -10 42 28 14 0 0 - 9 21 39 22 9 25 59 187 -77 - 8 33 45 -10 9 8 - 8 9 40 -10 32 45 15 0 0 - 9 11 3 22 9 12 58 188 -77 - 8 23 4 - 9 58 39 - 7 58 55 -10 22 19 16 0 0 - 8 59 45 22 8 59 58 190 -78 - 8 11 38 - 9 47 28 - 7 47 26 -10 11 11 17 0 0 - 8 47 43 22 8 46 58 191 -79 - 7 59 29 - 9 35 33 - 7 35 13 - 9 59 19 18 0 0 - 8 34 58 22 8 33 57 192 -80 - 7 46 36 - 9 22 55 - 7 22 16 - 9 46 45 19 0 0 - 8 21 28 22 8 20 57 193 -81 - 7 32 58 - 9 9 34 - 7 8 34 - 9 33 28 20 0 0 - 8 7 15 22 8 6 57 195 -82 - 7 18 36 - 8 55 29 - 6 54 7 - 9 19 28 21 0 0 - 7 52 18 22 7 53 56 196 -83 - 7 3 30 - 8 40 41 - 6 38 56 - 9 4 44 22 0 0 - 7 36 36 22 7 40 56 197 -84 - 6 47 38 - 8 25 8 - 6 22 59 - 8 49 16 23 0 0 - 7 20 9 22 7 27 55 198 -85 - 6 31 1 - 8 8 51 - 6 6 17 - 8 33 4 24 0 0 - 7 2 57 22 7 14 54 199 -86 - 6 13 38 - 7 51 50 - 5 48 49 - 8 16 7 25 0 0 - 6 45 0 22 7 1 54 200 -87 - 5 55 30 - 7 34 4 - 5 30 35 - 7 58 26 26 0 0 - 6 26 17 22 6 48 53 201 -88 - 5 36 36 - 7 15 32 - 5 11 35 - 7 40 0 27 0 0 - 6 6 48 22 6 35 53 202 -89 - 5 16 55 - 6 56 15 - 4 51 48 - 7 20 49 28 0 0 - 5 46 34 22 6 23 52 203 -89 - 4 56 27 - 6 36 13 - 4 31 14 - 7 0 52 29 0 0 - 5 25 32 22 6 10 51 203 -89 - 4 35 13 - 6 15 24 - 4 9 53 - 6 40 10 30 0 0 - 5 3 44 22 5 57 51 204 -88 - 4 13 11 - 5 53 49 - 3 47 44 - 6 18 42 31 0 0 - 4 41 9 22 5 44 50 205 -87 - 3 50 22 - 5 31 28 - 3 24 47 - 5 56 27 32 0 0 - 4 17 46 22 5 32 49 206 -86 - 3 26 45 - 5 8 19 - 3 1 3 - 5 33 26 33 0 0 - 3 53 36 22 5 19 48 206 -85 - 3 2 19 - 4 44 24 - 2 36 29 - 5 9 37 34 0 0 - 3 28 38 22 5 7 47 207 -84 - 2 37 5 - 4 19 41 - 2 11 7 - 4 45 1 35 0 0 - 3 2 51 22 4 54 47 208 -83 - 2 11 2 - 3 54 10 - 1 44 56 - 4 19 38 36 0 0 - 2 36 16 22 4 42 46 208 -82 - 1 44 10 - 3 27 51 - 1 17 56 - 3 53 27 37 0 0 - 2 8 52 22 4 30 45 209 -81 - 1 16 29 - 3 0 43 - 0 50 5 - 3 26 28 38 0 0 - 1 40 38 22 4 18 44 209 -80 - 0 47 58 - 2 32 47 - 0 21 25 - 2 58 41 39 0 0 - 1 11 36 22 4 6 43 210 -79 - 0 18 37 - 2 4 3 0 8 5 - 2 30 4 40 0 0 - 0 41 43 22 3 54 42 210 -77 0 11 35 - 1 34 28 0 38 27 - 2 0 39 41 0 0 - 0 11 1 22 3 42 41 211 -76 0 42 37 - 1 4 5 1 9 38 - 1 30 25 42 0 0 0 20 32 22 3 31 40 211 -75 1 14 29 - 0 32 52 1 41 41 - 0 59 21 43 0 0 0 52 55 22 3 19 39 212 -74 1 47 13 - 0 0 49 2 14 36 - 0 27 28 44 0 0 1 26 8 22 3 8 38 212 -73 2 20 48 0 32 4 2 48 21 0 5 15 45 0 0 2 0 13 22 2 57 38 213 -72 2 55 14 1 5 48 3 22 58 0 38 48 46 0 0 2 35 8 22 2 46 36 213 -71 3 30 31 1 40 21 3 58 27 1 13 11 47 0 0 3 10 54 22 2 35 35 214 -70 4 6 40 2 15 45 4 34 48 1 48 25 48 0 0 3 47 31 22 2 25 34 214 -69 4 43 41 2 52 0 5 12 1 2 24 28 49 0 0 4 24 59 22 2 14 33 214 -68 5 21 33 3 29 5 5 50 6 3 1 22 50 0 0 5 3 19 22 2 4 32 215 -66 6 0 17 4 7 1 6 29 2 3 39 6 51 0 0 5 42 29 22 1 54 31 215 -65 6 39 53 4 45 47 7 8 51 4 17 41 52 0 0 6 22 31 22 1 45 30 215 -64 7 20 20 5 25 24 7 49 31 4 57 5 53 0 0 7 3 23 22 1 35 29 216 -63 8 1 38 6 5 50 8 31 2 5 37 20 54 0 0 7 45 5 22 1 26 28 216 -62 8 43 47 6 47 7 9 13 25 6 18 24 55 0 0 8 27 38 22 1 17 27 216 -61 9 26 47 7 29 14 9 56 39 7 0 18 56 0 0 9 11 0 22 1 9 26 217 -59 10 10 37 8 12 10 10 40 44 7 43 1 57 0 0 9 55 12 22 1 1 25 217 -58 10 55 17 8 55 55 11 25 39 8 26 33 58 0 0 10 40 13 22 0 53 23 217 -57 11 40 47 9 40 28 12 11 23 9 10 53 59 0 0 11 26 2 22 0 45 22 218 -56 12 27 5 10 25 49 12 57 56 9 56 0 60 0 0 12 12 38 22 0 38 21 218 -55 13 14 11 11 11 57 13 45 17 10 41 55 61 0 0 13 0 2 22 0 31 20 218 -53 14 2 4 11 58 52 14 33 26 11 28 35 62 0 0 13 48 11 22 0 24 19 218 -52 14 50 43 12 46 32 15 22 21 12 16 2 63 0 0 14 37 5 22 0 18 17 219 -51 15 40 7 13 34 57 16 12 1 13 4 12 64 0 0 15 26 42 22 0 12 16 219 -50 16 30 16 14 24 5 17 2 25 13 53 6 65 0 0 16 17 2 22 0 7 15 219 -49 17 21 6 15 13 55 17 53 31 14 42 42 66 0 0 17 8 3 22 0 2 14 220 -47 18 12 38 16 4 26 18 45 19 15 32 58 67 0 0 17 59 43 21 59 57 12 220 -46 19 4 49 16 55 36 19 37 47 16 23 54 68 0 0 18 52 1 21 59 53 11 220 -45 19 57 39 17 47 24 20 30 52 17 15 28 69 0 0 19 44 55 21 59 49 10 221 -44 20 51 3 18 39 49 21 24 33 18 7 38 70 0 0 20 38 22 21 59 46 9 221 -42 21 45 2 19 32 47 22 18 48 19 0 22 71 0 0 21 32 22 21 59 43 7 222 -41 22 39 33 20 26 17 23 13 34 19 53 38 72 0 0 22 26 51 21 59 41 6 222 -40 23 34 33 21 20 18 24 8 50 20 47 24 73 0 0 23 21 48 21 59 39 5 222 -39 24 29 59 22 14 45 25 4 32 21 41 38 74 0 0 24 17 9 21 59 37 3 223 -37 25 25 50 23 9 38 26 0 38 22 36 18 75 0 0 25 12 53 21 59 36 2 223 -36 26 22 2 24 4 54 26 57 6 23 31 20 76 0 0 26 8 55 21 59 36 1 224 -35 .. .. .. 25 0 30 .. .. .. 24 26 42 Uncertainty in time = +/- 6 secs Prediction of 2012 Aug 26.0 Data for the target star ------------------------ * name: TYC 7986-00013-1 * constellation : Grus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 54 51.6935 DE: -40 16 33.882 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .026, .026 ) * V mag [mag]: 10.9 * B mag [mag]: 11.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (776) Berbericia approx. diameter [km]: 150 approx. diameter ["]: .117 distance from Earth [AU]: 1.76500 * orbital information: orbit source: Preston date of fit: 2012 Aug 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 864 number of rejected observations: 86 time covered by the observations: 1914 Mar 29 - 2012 Aug 06 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.015, 82° remarks: * orbital elements for (776) Berbericia : Mean anomaly = 316.31921001 deg Arg. of pericenter = 307.33477582 deg Long. of node = 79.83271120 deg Inclination = 18.25308059 deg Eccentricity = 0.16204816 Semimajor axis = 2.93178535 AU Perihelion dist = 2.45669494 AU Mag: H = 7.78, G = 0.34 Epoch of elements : MJD 56177.92400000 TDT (2012 Sep 07.924) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Sep 7 776 Berbericia 22h 11.2m UT 10.9 21 54 51.693-40 16 33.88TYC 7986-00013-1 11.7 11.6 150 19.0 1.765 -1.931 -2.23 8.5202 -40.275 -153.38 5.65 22.1872 -0.05071 0.49785 -4.43675 -0.45117 0.00169 0.00300 2000 314.7634222012 831.00000307.334776 79.832711 18.2530810.16204816 2.9317854 2.4566949 7.7 5.00.34 RATE 1.9633870 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.038 0.030 86 1.25 0.030 0 0 5-2 056165.0020120907_0013-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Aug 25, 22:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org