IOTA/IOTA-ES occultation update for (653) Berenike / TYC 0754-01652-1 event on 2012 Oct 22, 08:05 UT Visible from N Canada Summary ------- On 2012 Oct 22 UT, the 47 km diameter asteroid (653) Berenike will occult a 11.6 mag star in the constellation Gemini for observers along a path across N Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.1 mag to 14.6 mag (the magnitude of the asteroid) for at most 7.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 54 * date and approx. time of event: 2012 Oct 22, 07:54 - 2012 Oct 22, 08:07 UT * geocentric midpoint of event [JD]: 2456222.83805 * magnitude of target star: 11.6 * magnitude drop [mag]: 3.1 * estimated maximum duration [s]: 7.7 * Moon: 52 % sunlit, 158° distance * Sun: 109° distance * rough path description: N Canada The occultation path -------------------- * approximate projected width [km]: 67 * 1 sigma uncertainty interval [path widths]: +/- 1.17 * 1 sigma uncertainty interval [seconds]: +/- 9.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .028", 87° ) * approx speed of asteroid's shadow [km/s]: 6.0768 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0754-01652-1 by 653 Berenike on 2012 Oct 22 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 -170 0 0 66 24 15 7 54 34 0 58 -26 .. .. .. 66 46 3 .. .. .. 67 37 45 -169 0 0 66 39 28 7 54 34 1 59 -27 66 17 55 67 1 10 .. .. .. 67 52 36 -168 0 0 66 54 17 7 54 34 1 59 -27 66 32 51 67 15 52 .. .. .. 68 7 2 -167 0 0 67 8 42 7 54 35 2 60 -27 66 47 22 67 30 11 .. .. .. 68 21 5 -166 0 0 67 22 44 7 54 35 2 61 -27 67 1 31 67 44 6 .. .. .. 68 34 45 -165 0 0 67 36 23 7 54 36 2 62 -27 67 15 16 67 57 39 .. .. .. 68 48 1 -164 0 0 67 49 39 7 54 36 3 63 -27 67 28 38 68 10 48 .. .. .. 69 0 55 -163 0 0 68 2 33 7 54 37 3 64 -27 67 41 38 68 23 36 .. .. .. 69 13 26 -162 0 0 68 15 4 7 54 37 4 65 -27 67 54 16 68 36 1 .. .. .. 69 25 36 -161 0 0 68 27 14 7 54 38 4 66 -28 68 6 32 68 48 5 .. .. .. 69 37 25 -160 0 0 68 39 3 7 54 39 5 67 -28 68 18 27 68 59 47 67 30 47 69 48 52 -159 0 0 68 50 31 7 54 40 5 68 -28 68 30 1 69 11 9 67 42 35 69 59 59 -158 0 0 69 1 38 7 54 41 5 69 -28 68 41 14 69 22 10 67 54 2 70 10 45 -157 0 0 69 12 25 7 54 42 6 70 -28 68 52 7 69 32 51 68 5 8 70 21 11 -156 0 0 69 22 52 7 54 43 6 71 -28 69 2 40 69 43 12 68 15 54 70 31 18 -155 0 0 69 33 0 7 54 44 7 72 -28 69 12 53 69 53 14 68 26 20 70 41 6 -154 0 0 69 42 48 7 54 45 7 72 -28 69 22 47 70 2 56 68 36 27 70 50 34 -153 0 0 69 52 17 7 54 47 7 73 -28 69 32 22 70 12 20 68 46 15 70 59 44 -152 0 0 70 1 28 7 54 48 8 74 -28 69 41 39 70 21 25 68 55 43 71 8 36 -151 0 0 70 10 21 7 54 49 8 75 -28 69 50 36 70 30 12 69 4 53 71 17 10 -150 0 0 70 18 55 7 54 51 8 76 -28 69 59 16 70 38 41 69 13 45 71 25 27 -149 0 0 70 27 12 7 54 52 9 77 -29 70 7 38 70 46 53 69 22 18 71 33 26 -148 0 0 70 35 12 7 54 54 9 78 -29 70 15 43 70 54 48 69 30 34 71 41 8 -147 0 0 70 42 54 7 54 55 10 79 -29 70 23 30 71 2 25 69 38 32 71 48 34 -146 0 0 70 50 20 7 54 57 10 80 -29 70 31 0 71 9 46 69 46 13 71 55 43 -145 0 0 70 57 29 7 54 58 10 81 -29 70 38 14 71 16 50 69 53 38 72 2 36 -144 0 0 71 4 21 7 55 0 11 82 -29 70 45 11 71 23 38 70 0 45 72 9 13 -143 0 0 71 10 58 7 55 2 11 83 -29 70 51 52 71 30 11 70 7 36 72 15 35 -142 0 0 71 17 19 7 55 3 11 84 -29 70 58 17 71 36 28 70 14 11 72 21 42 -141 0 0 71 23 25 7 55 5 12 85 -29 71 4 27 71 42 29 70 20 30 72 27 33 -140 0 0 71 29 15 7 55 7 12 86 -29 71 10 21 71 48 15 70 26 33 72 33 9 -139 0 0 71 34 50 7 55 9 12 87 -29 71 16 0 71 53 46 70 32 20 72 38 31 -138 0 0 71 40 10 7 55 11 13 88 -29 71 21 24 71 59 2 70 37 52 72 43 39 -137 0 0 71 45 15 7 55 12 13 89 -29 71 26 33 72 4 4 70 43 9 72 48 32 -136 0 0 71 50 6 7 55 14 13 90 -29 71 31 27 72 8 52 70 48 11 72 53 11 -135 0 0 71 54 43 7 55 16 13 91 -29 71 36 7 72 13 25 70 52 59 72 57 36 -134 0 0 71 59 5 7 55 18 14 92 -29 71 40 32 72 17 44 70 57 31 73 1 48 -133 0 0 72 3 14 7 55 20 14 93 -29 71 44 44 72 21 50 71 1 50 73 5 46 -132 0 0 72 7 8 7 55 22 14 94 -29 71 48 41 72 25 42 71 5 54 73 9 31 -131 0 0 72 10 49 7 55 25 15 95 -29 71 52 25 72 29 20 71 9 43 73 13 3 -130 0 0 72 14 17 7 55 27 15 96 -29 71 55 55 72 32 45 71 13 19 73 16 22 -129 0 0 72 17 31 7 55 29 15 97 -29 71 59 11 72 35 56 71 16 41 73 19 28 -128 0 0 72 20 32 7 55 31 16 98 -29 72 2 14 72 38 55 71 19 49 73 22 21 -127 0 0 72 23 19 7 55 33 16 99 -29 72 5 4 72 41 40 71 22 44 73 25 1 -126 0 0 72 25 54 7 55 35 16 100 -29 72 7 41 72 44 13 71 25 25 73 27 29 -125 0 0 72 28 15 7 55 38 16 101 -29 72 10 4 72 46 33 71 27 53 73 29 44 -124 0 0 72 30 24 7 55 40 17 102 -29 72 12 14 72 48 40 71 30 7 73 31 47 -123 0 0 72 32 20 7 55 42 17 103 -29 72 14 12 72 50 34 71 32 8 73 33 38 -122 0 0 72 34 3 7 55 45 17 104 -29 72 15 57 72 52 16 71 33 56 73 35 16 -121 0 0 72 35 34 7 55 47 18 105 -29 72 17 28 72 53 45 71 35 30 73 36 42 -120 0 0 72 36 52 7 55 50 18 105 -29 72 18 47 72 55 2 71 36 52 73 37 57 -119 0 0 72 37 57 7 55 52 18 106 -29 72 19 54 72 56 7 71 38 0 73 38 59 -118 0 0 72 38 50 7 55 54 19 107 -29 72 20 47 72 56 59 71 38 56 73 39 49 -117 0 0 72 39 31 7 55 57 19 108 -28 72 21 28 72 57 38 71 39 38 73 40 27 -116 0 0 72 39 58 7 56 0 19 109 -28 72 21 57 72 58 6 71 40 8 73 40 53 -115 0 0 72 40 14 7 56 2 19 110 -28 72 22 13 72 58 21 71 40 25 73 41 8 -114 0 0 72 40 17 7 56 5 20 111 -28 72 22 16 72 58 24 71 40 29 73 41 10 -113 0 0 72 40 8 7 56 8 20 112 -28 72 22 7 72 58 14 71 40 19 73 41 0 -112 0 0 72 39 46 7 56 10 20 113 -28 72 21 45 72 57 52 71 39 57 73 40 39 -111 0 0 72 39 11 7 56 13 20 114 -28 72 21 10 72 57 18 71 39 22 73 40 5 -110 0 0 72 38 24 7 56 16 21 116 -28 72 20 23 72 56 32 71 38 34 73 39 20 -109 0 0 72 37 25 7 56 19 21 117 -28 72 19 23 72 55 33 71 37 33 73 38 22 -108 0 0 72 36 13 7 56 21 21 118 -28 72 18 10 72 54 22 71 36 19 73 37 12 -107 0 0 72 34 48 7 56 24 22 119 -28 72 16 45 72 52 58 71 34 52 73 35 50 -106 0 0 72 33 11 7 56 27 22 120 -28 72 15 6 72 51 21 71 33 11 73 34 16 -105 0 0 72 31 21 7 56 30 22 121 -28 72 13 15 72 49 32 71 31 17 73 32 30 -104 0 0 72 29 18 7 56 33 22 122 -28 72 11 11 72 47 30 71 29 10 73 30 31 -103 0 0 72 27 2 7 56 37 23 123 -28 72 8 53 72 45 16 71 26 50 73 28 20 -102 0 0 72 24 33 7 56 40 23 124 -28 72 6 23 72 42 48 71 24 15 73 25 57 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0 71 19 34 7 57 34 27 139 -26 71 0 43 71 38 31 70 17 3 72 23 20 - 86 0 0 71 13 15 7 57 38 28 140 -26 70 54 20 71 32 16 70 10 31 72 17 14 - 85 0 0 71 6 39 7 57 42 28 141 -26 70 47 41 71 25 45 70 3 42 72 10 53 - 84 0 0 70 59 48 7 57 46 28 142 -26 70 40 45 71 18 57 69 56 36 72 4 16 - 83 0 0 70 52 39 7 57 51 28 143 -25 70 33 32 71 11 53 69 49 14 71 57 22 - 82 0 0 70 45 13 7 57 55 29 145 -25 70 26 2 71 4 32 69 41 33 71 50 12 - 81 0 0 70 37 30 7 58 0 29 146 -25 70 18 14 70 56 54 69 33 35 71 42 45 - 80 0 0 70 29 29 7 58 5 29 147 -25 70 10 8 70 48 58 69 25 19 71 35 1 - 79 0 0 70 21 11 7 58 9 30 148 -25 70 1 45 70 40 44 69 16 44 71 26 59 - 78 0 0 70 12 33 7 58 14 30 149 -25 69 53 2 70 32 12 69 7 50 71 18 39 - 77 0 0 70 3 37 7 58 19 30 150 -24 69 44 1 70 23 21 68 58 37 71 10 1 - 76 0 0 69 54 22 7 58 24 31 151 -24 69 34 41 70 14 11 68 49 5 71 1 4 - 75 0 0 69 44 48 7 58 29 31 152 -24 69 25 1 70 4 42 68 39 13 70 51 49 - 74 0 0 69 34 53 7 58 35 31 153 -24 69 15 1 69 54 54 68 29 0 70 42 14 - 73 0 0 69 24 39 7 58 40 31 154 -24 69 4 40 69 44 45 68 18 27 70 32 19 - 72 0 0 69 14 3 7 58 46 32 155 -23 68 53 59 69 34 15 68 7 32 70 22 3 - 71 0 0 69 3 7 7 58 51 32 157 -23 68 42 57 69 23 25 67 56 17 70 11 27 - 70 0 0 68 51 49 7 58 57 32 158 -23 68 31 33 69 12 13 67 44 39 70 0 30 - 69 0 0 68 40 9 7 59 3 33 159 -23 68 19 47 69 0 39 67 32 39 69 49 12 - 68 0 0 68 28 6 7 59 9 33 160 -23 68 7 38 68 48 43 67 20 16 69 37 31 - 67 0 0 68 15 41 7 59 15 33 161 -22 67 55 7 68 36 24 67 7 30 69 25 28 - 66 0 0 68 2 52 7 59 22 34 162 -22 67 42 11 68 23 42 66 54 20 69 13 2 - 65 0 0 67 49 40 7 59 28 34 163 -22 67 28 53 68 10 36 66 40 47 69 0 12 - 64 0 0 67 36 3 7 59 35 34 165 -22 67 15 9 67 57 6 66 26 48 68 46 58 - 63 0 0 67 22 2 7 59 42 35 166 -21 67 1 1 67 43 12 66 12 25 68 33 20 - 62 0 0 67 7 35 7 59 49 35 167 -21 66 46 28 67 28 52 65 57 36 68 19 17 - 61 0 0 66 52 43 7 59 56 35 168 -21 66 31 29 67 14 7 65 42 22 68 4 49 - 60 0 0 66 37 24 8 0 3 36 169 -20 66 16 3 66 58 55 65 26 41 67 49 54 - 59 0 0 66 21 39 8 0 10 36 171 -20 66 0 11 66 43 17 65 10 33 67 34 33 - 58 0 0 66 5 26 8 0 18 36 172 -20 65 43 51 66 27 11 64 53 58 67 18 45 - 57 0 0 65 48 46 8 0 26 37 173 -20 65 27 4 66 10 38 64 36 55 67 2 29 - 56 0 0 65 31 38 8 0 34 37 174 -19 65 9 49 65 53 37 64 19 23 66 45 45 - 55 0 0 65 14 1 8 0 42 37 176 -19 64 52 5 65 36 7 64 1 24 66 28 32 - 54 0 0 64 55 55 8 0 51 38 177 -19 64 33 52 65 18 8 63 42 55 66 10 51 - 53 0 0 64 37 19 8 0 59 38 178 -18 64 15 9 64 59 40 63 23 56 65 52 39 - 52 0 0 64 18 13 8 1 8 38 179 -18 63 55 56 64 40 41 63 4 27 65 33 58 - 51 0 0 63 58 37 8 1 17 39 181 -17 63 36 13 64 21 12 62 44 29 65 14 46 - 50 0 0 63 38 30 8 1 27 39 182 -17 63 15 59 64 1 12 62 23 59 64 55 3 - 49 0 0 63 17 51 8 1 36 39 183 -17 62 55 14 63 40 40 62 2 58 64 34 48 - 48 0 0 62 56 41 8 1 46 40 185 -16 62 33 57 63 19 37 61 41 26 64 14 2 - 47 0 0 62 34 59 8 1 56 40 186 -16 62 12 8 62 58 2 61 19 23 63 52 43 - 46 0 0 62 12 45 8 2 6 40 187 -15 61 49 47 62 35 54 60 56 47 63 30 52 - 45 0 0 61 49 58 8 2 17 41 189 -15 61 26 54 62 13 13 60 33 39 63 8 27 - 44 0 0 61 26 38 8 2 28 41 190 -14 61 3 28 61 50 0 60 9 59 62 45 29 - 43 0 0 61 2 45 8 2 39 41 192 -14 60 39 29 61 26 13 59 45 46 62 21 58 - 42 0 0 60 38 19 8 2 50 41 193 -13 60 14 57 61 1 53 59 21 1 61 57 53 - 41 0 0 60 13 20 8 3 2 42 194 -13 59 49 52 60 37 0 58 55 43 61 33 13 - 40 0 0 59 47 47 8 3 13 42 196 -12 59 24 13 60 11 33 58 29 52 61 8 0 - 39 0 0 59 21 41 8 3 26 42 197 -12 58 58 2 59 45 32 58 3 28 60 42 13 - 38 0 0 58 55 1 8 3 38 43 199 -11 58 31 17 59 18 58 57 36 32 60 15 51 - 37 0 0 58 27 48 8 3 51 43 200 -11 58 3 59 58 51 50 57 9 4 59 48 55 - 36 0 0 58 0 2 8 4 3 43 202 -10 57 36 9 58 24 9 56 41 3 59 21 25 - 35 0 0 57 31 44 8 4 17 43 203 -9 57 7 46 57 55 54 56 12 30 58 53 22 - 34 0 0 57 2 53 8 4 30 43 205 -9 56 38 51 57 27 7 55 43 26 58 24 45 - 33 0 0 56 33 29 8 4 44 44 207 -8 56 9 24 56 57 48 55 13 51 57 55 34 - 32 0 0 56 3 34 8 4 58 44 208 -8 55 39 26 56 27 56 54 43 45 57 25 51 - 31 0 0 55 33 9 8 5 12 44 210 -7 55 8 57 55 57 34 54 13 9 56 55 36 - 30 0 0 55 2 12 8 5 26 44 212 -6 54 37 58 55 26 40 53 42 4 56 24 49 - 29 0 0 54 30 46 8 5 41 44 213 -5 54 6 29 54 55 16 53 10 31 55 53 31 - 28 0 0 53 58 51 8 5 56 44 215 -5 53 34 32 54 23 23 52 38 29 55 21 43 - 27 0 0 53 26 28 8 6 11 44 216 -4 53 2 8 53 51 2 52 6 1 54 49 26 - 26 0 0 52 53 38 8 6 26 44 218 -3 52 29 17 53 18 13 51 33 7 54 16 40 - 25 0 0 52 20 22 8 6 42 44 220 -2 51 56 0 52 44 58 50 59 49 53 43 26 - 24 0 0 51 46 41 8 6 58 44 222 -2 51 22 18 52 11 17 50 26 6 53 9 47 - 23 0 0 51 12 36 8 7 14 44 223 -1 50 48 14 51 37 12 49 52 2 52 35 42 - 22 0 0 50 38 9 8 7 30 44 225 0 50 13 47 51 2 45 49 17 36 52 1 14 Uncertainty in time = +/- 10 secs Prediction of 2012 Jul 10.0 Data for the target star ------------------------ * name: TYC 0754-01652-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 39 10.9120 DE: +12 36 17.284 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .025 ) * V mag [mag]: 11.6 * B mag [mag]: 13.0 * Apparent position with proper motion RA(deg): 99.9811304264 DE(deg): 12.5918603020 * Equation of equinoxes (radians) : 0.000060741894951 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (653) Berenike approx. diameter [km]: 47 approx. diameter ["]: .025 distance from Earth [AU]: 2.57100 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1112 number of rejected observations: 68 time covered by the observations: 1911 Aug 19 - 2012 Jan 27 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.013, 83° remarks: * orbital elements for (653) Berenike : Mean anomaly = 259.94707460 deg Arg. of pericenter = 52.65097831 deg Long. of node = 132.90769593 deg Inclination = 11.27834998 deg Eccentricity = 0.04025645 Semimajor axis = 3.01914952 AU Perihelion dist = 2.89760928 AU Mag: H = 9.19, G = 0.15 Epoch of elements : MJD 56222.33700000 TDT (2012 Oct 22.337) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 22 653 Berenike 8h 6.8m UT 11.6 6 39 10.912 12 36 17.28TYC 0754-01652-1 13.0 14.6 47 7.7 2.571 0.730 -4.80 -53.0660 12.607 54.42 -11.24 8.1132 0.29082 0.64892 3.12964 -1.40346 -0.00549 0.00074 2000 259.50800320121020.00000 52.650978132.907696 11.2783500.04025645 3.0191495 2.8976093 9.2 5.00.15 RATE 1.8787850 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.028 87 2.17 0.030 0 0 0 4 056118.0020121022_1652-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Aug 26, 04:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org