IOTA/IOTA-ES occultation update for (2880) Nihondaira / HIP 1941 event on 2007 Jul 01, 23:48 UT Visible from SW Asia, Arabia, Africa Summary ------- On 2007 Jul 01 UT, the 18 km diameter asteroid (2880) Nihondaira will occult a 7.6 mag star in the constellation Pisces for observers along a path across SW Asia, Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 8.7 mag to 16.3 mag (the magnitude of the asteroid) for at most 1.2 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: 21 * date and approx. time of event: 2007 Jul 01, 23:43 - 2007 Jul 01, 23:52 UT * magnitude of target star: 7.6 * magnitude drop [mag]: 8.7 * estimated maximum duration [s]: 1.2 * Moon: 98 % sunlit, 67° distance * Sun: 96° distance * rough path description: SW Asia, Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 3.17 * 1 sigma uncertainty interval [seconds]: +/- 8.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .099 +/- .070) * 1 sigma uncertainty ellipse (major, minor, PA): ( .112", .046", 59° ) * approx speed of asteroid's shadow [km/s]: 15.0440 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 1941 by 2880 Nihondaira on 2007 Jul 01 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 4 0 0 31 11 3 23 43 59 1 96 -36 31 3 23 31 18 44 .. .. .. 32 7 58 5 0 0 31 6 42 23 43 59 1 96 -36 30 59 2 31 14 23 .. .. .. 32 3 36 6 0 0 31 2 50 23 44 0 2 97 -36 30 55 11 31 10 31 .. .. .. 31 59 42 7 0 0 30 59 26 23 44 0 3 97 -36 30 51 47 31 7 7 .. .. .. 31 56 17 8 0 0 30 56 31 23 44 1 4 98 -36 30 48 52 31 4 12 .. .. .. 31 53 21 9 0 0 30 54 5 23 44 1 5 98 -36 30 46 26 31 1 45 .. .. .. 31 50 53 10 0 0 30 52 7 23 44 2 6 99 -36 30 44 28 30 59 48 .. .. .. 31 48 55 11 0 0 30 50 39 23 44 3 7 99 -36 30 43 0 30 58 19 29 54 58 31 47 26 12 0 0 30 49 39 23 44 5 7 100 -36 30 42 0 30 57 19 29 53 58 31 46 27 13 0 0 30 49 8 23 44 6 8 100 -36 30 41 29 30 56 49 29 53 27 31 45 56 14 0 0 30 49 7 23 44 7 9 101 -36 30 41 28 30 56 47 29 53 25 31 45 55 15 0 0 30 49 34 23 44 9 10 101 -35 30 41 55 30 57 15 29 53 51 31 46 24 16 0 0 30 50 31 23 44 11 11 102 -35 30 42 52 30 58 12 29 54 47 31 47 22 17 0 0 30 51 57 23 44 13 12 103 -35 30 44 18 30 59 38 29 56 12 31 48 49 18 0 0 30 53 52 23 44 15 12 103 -35 30 46 13 31 1 34 29 58 5 31 50 47 19 0 0 30 56 17 23 44 17 13 104 -34 30 48 37 31 3 58 30 0 28 31 53 13 20 0 0 30 59 11 23 44 20 14 104 -34 30 51 30 31 6 53 30 3 19 31 56 10 21 0 0 31 2 34 23 44 22 15 105 -34 30 54 53 31 10 16 30 6 40 31 59 35 22 0 0 31 6 26 23 44 25 16 105 -34 30 58 45 31 14 9 30 10 29 32 3 31 23 0 0 31 10 48 23 44 28 17 106 -33 31 3 6 31 18 31 30 14 48 32 7 56 24 0 0 31 15 39 23 44 31 17 107 -33 31 7 57 31 23 22 30 19 35 32 12 50 25 0 0 31 20 59 23 44 34 18 107 -32 31 13 16 31 28 43 30 24 52 32 18 14 26 0 0 31 26 48 23 44 37 19 108 -32 31 19 5 31 34 33 30 30 37 32 24 8 27 0 0 31 33 6 23 44 40 20 109 -32 31 25 23 31 40 51 30 36 51 32 30 30 28 0 0 31 39 54 23 44 44 21 109 -31 31 32 9 31 47 39 30 43 34 32 37 22 29 0 0 31 47 10 23 44 47 21 110 -31 31 39 25 31 54 56 30 50 45 32 44 43 30 0 0 31 54 54 23 44 51 22 111 -30 31 47 9 32 2 42 30 58 25 32 52 34 31 0 0 32 3 8 23 44 55 23 111 -30 31 55 21 32 10 56 31 6 33 33 0 53 32 0 0 32 11 50 23 44 59 24 112 -29 32 4 3 32 19 39 31 15 10 33 9 41 33 0 0 32 21 1 23 45 3 24 113 -28 32 13 12 32 28 50 31 24 14 33 18 57 34 0 0 32 30 39 23 45 7 25 114 -28 32 22 50 32 38 30 31 33 47 33 28 43 35 0 0 32 40 46 23 45 12 26 114 -27 32 32 56 32 48 37 31 43 48 33 38 56 36 0 0 32 51 21 23 45 16 26 115 -27 32 43 30 32 59 13 31 54 16 33 49 38 37 0 0 33 2 23 23 45 21 27 116 -26 32 54 32 33 10 16 32 5 11 34 0 48 38 0 0 33 13 53 23 45 26 28 117 -25 33 6 1 33 21 47 32 16 34 34 12 25 39 0 0 33 25 51 23 45 30 29 118 -25 33 17 57 33 33 46 32 28 24 34 24 30 40 0 0 33 38 15 23 45 35 29 119 -24 33 30 20 33 46 11 32 40 41 34 37 2 41 0 0 33 51 6 23 45 40 30 120 -23 33 43 10 33 59 3 32 53 24 34 50 2 42 0 0 34 4 24 23 45 45 30 120 -23 33 56 27 34 12 22 33 6 34 35 3 28 43 0 0 34 18 7 23 45 51 31 121 -22 34 10 9 34 26 7 33 20 10 35 17 20 44 0 0 34 32 17 23 45 56 32 122 -21 34 24 18 34 40 18 33 34 11 35 31 39 45 0 0 34 46 53 23 46 1 32 123 -21 34 38 52 34 54 54 33 48 38 35 46 23 46 0 0 35 1 53 23 46 7 33 124 -20 34 53 52 35 9 56 34 3 30 36 1 33 47 0 0 35 17 19 23 46 12 33 125 -19 35 9 16 35 25 23 34 18 46 36 17 8 48 0 0 35 33 9 23 46 18 34 126 -18 35 25 5 35 41 14 34 34 27 36 33 8 49 0 0 35 49 23 23 46 24 34 128 -18 35 41 17 35 57 30 34 50 32 36 49 32 50 0 0 36 6 1 23 46 29 35 129 -17 35 57 54 36 14 9 35 7 1 37 6 20 51 0 0 36 23 2 23 46 35 35 130 -16 36 14 54 36 31 12 35 23 52 37 23 32 52 0 0 36 40 26 23 46 41 36 131 -15 36 32 17 36 48 37 35 41 7 37 41 6 53 0 0 36 58 13 23 46 47 36 132 -15 36 50 2 37 6 25 35 58 43 37 59 3 54 0 0 37 16 21 23 46 53 37 133 -14 37 8 9 37 24 35 36 16 42 38 17 22 55 0 0 37 34 51 23 46 59 37 135 -13 37 26 37 37 43 6 36 35 1 38 36 3 56 0 0 37 53 41 23 47 5 37 136 -12 37 45 26 38 1 58 36 53 42 38 55 4 57 0 0 38 12 52 23 47 11 38 137 -11 38 4 36 38 21 10 37 12 42 39 14 26 58 0 0 38 32 23 23 47 18 38 138 -10 38 24 5 38 40 42 37 32 3 39 34 8 59 0 0 38 52 13 23 47 24 38 140 -10 38 43 53 39 0 34 37 51 42 39 54 9 60 0 0 39 12 21 23 47 30 38 141 -9 39 4 0 39 20 44 38 11 40 40 14 28 61 0 0 39 32 48 23 47 36 39 142 -8 39 24 25 39 41 12 38 31 56 40 35 6 62 0 0 39 53 31 23 47 43 39 143 -7 39 45 7 40 1 57 38 52 30 40 56 1 63 0 0 40 14 32 23 47 49 39 145 -6 40 6 6 40 22 59 39 13 20 41 17 13 64 0 0 40 35 48 23 47 55 39 146 -6 40 27 21 40 44 17 39 34 26 41 38 40 65 0 0 40 57 20 23 48 1 39 148 -5 40 48 52 41 5 50 39 55 47 42 0 23 66 0 0 41 19 7 23 48 8 39 149 -4 41 10 37 41 27 38 40 17 23 42 22 21 67 0 0 41 41 7 23 48 14 39 150 -3 41 32 36 41 49 40 40 39 13 42 44 32 68 0 0 42 3 20 23 48 20 40 152 -2 41 54 48 42 11 55 41 1 16 43 6 57 69 0 0 42 25 46 23 48 27 40 153 -1 42 17 12 42 34 22 41 23 32 43 29 34 70 0 0 42 48 24 23 48 33 40 154 0 42 39 49 42 57 1 41 46 0 43 52 23 71 0 0 43 11 13 23 48 39 39 156 0 43 2 36 43 19 51 42 8 38 44 15 22 72 0 0 43 34 12 23 48 45 39 157 1 43 25 33 43 42 52 42 31 27 44 38 31 73 0 0 43 57 20 23 48 51 39 159 2 43 48 40 44 6 1 42 54 26 45 1 50 74 0 0 44 20 36 23 48 58 39 160 3 44 11 55 44 29 19 43 17 33 45 25 17 75 0 0 44 44 1 23 49 4 39 161 4 44 35 19 44 52 45 43 40 48 45 48 51 76 0 0 45 7 32 23 49 10 39 163 5 44 58 49 45 16 18 44 4 11 46 12 33 77 0 0 45 31 10 23 49 16 39 164 5 45 22 25 45 39 56 44 27 39 46 36 20 78 0 0 45 54 53 23 49 22 39 166 6 45 46 7 46 3 41 44 51 13 47 0 12 79 0 0 46 18 40 23 49 28 38 167 7 46 9 53 46 27 29 45 14 52 47 24 8 80 0 0 46 42 31 23 49 33 38 168 8 46 33 43 46 51 21 45 38 35 47 48 8 81 0 0 47 6 25 23 49 39 38 170 9 46 57 35 47 15 16 46 2 21 48 12 10 82 0 0 47 30 21 23 49 45 38 171 9 47 21 30 47 39 13 46 26 10 48 36 14 83 0 0 47 54 18 23 49 51 37 172 10 47 45 26 48 3 11 46 49 59 49 0 19 84 0 0 48 18 15 23 49 56 37 174 11 48 9 22 48 27 9 47 13 50 49 24 24 85 0 0 48 42 12 23 50 2 37 175 12 48 33 18 48 51 7 47 37 40 49 48 28 86 0 0 49 6 7 23 50 7 36 176 13 48 57 13 49 15 4 48 1 30 50 12 30 87 0 0 49 30 1 23 50 12 36 177 13 49 21 6 49 38 58 48 25 17 50 36 30 88 0 0 49 53 52 23 50 18 36 179 14 49 44 56 50 2 50 48 49 3 51 0 27 89 0 0 50 17 39 23 50 23 35 180 15 50 8 42 50 26 37 49 12 45 51 24 19 90 0 0 50 41 22 23 50 28 35 181 16 50 32 24 50 50 21 49 36 23 51 48 7 91 0 0 51 4 59 23 50 33 34 182 16 50 56 1 51 13 59 49 59 56 52 11 49 92 0 0 51 28 31 23 50 38 34 184 17 51 19 33 51 37 31 50 23 24 52 35 25 93 0 0 51 51 56 23 50 43 34 185 18 51 42 57 52 0 57 50 46 46 52 58 54 94 0 0 52 15 14 23 50 47 33 186 18 52 6 15 52 24 15 51 10 1 53 22 15 95 0 0 52 38 24 23 50 52 33 187 19 52 29 24 52 47 25 51 33 8 53 45 27 96 0 0 53 1 25 23 50 56 32 188 20 52 52 25 53 10 27 51 56 7 54 8 31 97 0 0 53 24 17 23 51 1 32 190 20 53 15 17 53 33 19 52 18 58 54 31 24 98 0 0 53 46 59 23 51 5 31 191 21 53 37 58 53 56 1 52 41 39 54 54 8 99 0 0 54 9 30 23 51 9 31 192 22 54 0 30 54 18 32 53 4 9 55 16 40 100 0 0 54 31 50 23 51 14 30 193 22 54 22 50 54 40 53 53 26 30 55 39 0 101 0 0 54 53 59 23 51 18 30 194 23 54 44 59 55 3 1 53 48 38 56 1 9 102 0 0 55 15 55 23 51 21 29 195 24 55 6 55 55 24 58 54 10 36 56 23 4 103 0 0 55 37 39 23 51 25 29 196 24 55 28 39 55 46 41 54 32 21 56 44 47 104 0 0 55 59 10 23 51 29 28 197 25 55 50 10 56 8 12 54 53 53 57 6 16 105 0 0 56 20 27 23 51 33 28 198 25 56 11 27 56 29 28 55 15 12 57 27 30 106 0 0 56 41 30 23 51 36 27 200 26 56 32 30 56 50 31 55 36 17 57 48 30 107 0 0 57 2 18 23 51 40 27 201 27 56 53 19 57 11 19 55 57 9 58 9 16 108 0 0 57 22 51 23 51 43 26 202 27 57 13 53 57 31 52 56 17 45 58 29 45 109 0 0 57 43 10 23 51 46 26 203 28 57 34 12 57 52 9 56 38 8 58 49 59 110 0 0 58 3 12 23 51 49 25 204 28 57 54 15 58 12 11 56 58 14 59 9 58 111 0 0 58 22 59 23 51 53 25 205 29 58 14 3 58 31 57 57 18 6 59 29 39 112 0 0 58 42 30 23 51 56 24 206 29 58 33 34 58 51 27 57 37 42 59 49 4 113 0 0 59 1 44 23 51 58 24 207 30 58 52 49 59 10 41 57 57 1 60 8 13 114 0 0 59 20 41 23 52 1 23 208 30 59 11 47 59 29 37 58 16 5 60 27 4 115 0 0 59 39 22 23 52 4 23 209 31 59 30 29 59 48 17 58 34 52 60 45 38 116 0 0 59 57 46 23 52 7 22 210 31 59 48 53 60 6 40 58 53 22 61 3 54 117 0 0 60 15 52 23 52 9 21 211 32 60 7 0 60 24 45 59 11 35 61 21 53 118 0 0 60 33 41 23 52 12 21 212 32 60 24 50 60 42 33 59 29 31 61 39 35 119 0 0 60 51 12 23 52 14 20 213 33 60 42 23 61 0 4 59 47 10 61 56 58 120 0 0 61 8 26 23 52 16 20 214 33 60 59 38 61 17 16 60 4 32 62 14 3 121 0 0 61 25 22 23 52 18 19 215 33 61 16 35 61 34 11 60 21 36 62 30 51 122 0 0 61 42 1 23 52 20 19 216 34 61 33 15 61 50 49 60 38 23 62 47 20 123 0 0 61 58 21 23 52 23 18 217 34 61 49 37 62 7 8 60 54 52 63 3 31 124 0 0 62 14 24 23 52 25 18 218 35 62 5 41 62 23 9 61 11 4 63 19 25 125 0 0 62 30 9 23 52 26 17 219 35 62 21 27 62 38 53 61 26 57 63 35 0 126 0 0 62 45 36 23 52 28 17 219 35 62 36 55 62 54 19 61 42 34 63 50 17 127 0 0 63 0 45 23 52 30 16 220 36 62 52 6 63 9 27 61 57 52 64 5 16 128 0 0 63 15 37 23 52 32 16 221 36 63 6 58 63 24 17 62 12 53 64 19 57 129 0 0 63 30 10 23 52 33 15 222 36 63 21 33 63 38 49 62 27 37 64 34 20 130 0 0 63 44 26 23 52 35 15 223 37 63 35 51 63 53 3 62 42 3 64 48 25 131 0 0 63 58 24 23 52 36 15 224 37 63 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16 67 45 19 146 0 0 66 53 52 23 52 52 8 238 40 66 45 40 67 2 6 65 54 13 67 54 55 147 0 0 67 3 24 23 52 53 7 239 41 66 55 13 67 11 36 66 3 55 68 4 16 148 0 0 67 12 40 23 52 53 7 240 41 67 4 30 67 20 51 66 13 21 68 13 22 149 0 0 67 21 41 23 52 54 7 241 41 67 13 33 67 29 51 66 22 31 68 22 12 150 0 0 67 30 26 23 52 54 6 242 41 67 22 20 67 38 35 66 31 27 68 30 47 151 0 0 67 38 57 23 52 55 6 243 41 67 30 52 67 47 4 66 40 7 68 39 8 152 0 0 67 47 13 23 52 55 5 244 41 67 39 9 67 55 19 66 48 32 68 47 13 153 0 0 67 55 14 23 52 56 5 245 42 67 47 11 68 3 18 66 56 42 68 55 5 154 0 0 68 3 1 23 52 56 5 246 42 67 54 59 68 11 4 .. .. .. 69 2 42 155 0 0 68 10 33 23 52 56 4 247 42 68 2 33 68 18 35 .. .. .. 69 10 5 156 0 0 68 17 51 23 52 57 4 248 42 68 9 52 68 25 52 .. .. .. 69 17 13 157 0 0 68 24 55 23 52 57 3 249 42 68 16 57 68 32 55 .. .. .. 69 24 8 158 0 0 68 31 45 23 52 57 3 249 42 68 23 48 68 39 44 .. .. .. 69 30 50 159 0 0 68 38 22 23 52 57 3 250 42 68 30 26 68 46 19 .. .. .. 69 37 17 160 0 0 68 44 44 23 52 58 2 251 42 68 36 50 68 52 40 .. .. .. 69 43 32 161 0 0 68 50 54 23 52 58 2 252 42 68 43 0 68 58 49 .. .. .. 69 49 33 162 0 0 68 56 50 23 52 58 2 253 42 68 48 57 69 4 43 .. .. .. 69 55 20 163 0 0 69 2 32 23 52 58 1 254 42 68 54 41 69 10 25 .. .. .. 70 0 55 164 0 0 69 8 2 23 52 58 1 255 43 69 0 11 69 15 54 .. .. .. 70 6 17 165 0 0 69 13 18 23 52 58 0 256 43 69 5 29 69 21 9 .. .. .. 70 11 27 166 0 0 69 18 22 23 52 58 0 257 43 69 10 34 69 26 12 .. .. .. .. .. .. Data for the target star ------------------------ * name: HIP 1941 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 24 32.8924 DE: -04 38 52.073 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .017, .009 ) * V mag [mag]: 7.6 * B mag [mag]: 9.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2880) Nihondaira approx. diameter [km]: 18 approx. diameter ["]: .016 distance from Earth [AU]: 1.52200 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 667 number of rejected observations: 26 time covered by the observations: 1977 May 15 - 2007 May 13 1 sigma uncertainty ellipse (major, minor, PA): 0.111, 0.045, 58° remarks: * orbital elements for (2880) Nihondaira : Mean anomaly = 32.59113049 deg Arg. of pericenter = 246.84004836 deg Long. of node = 39.74814255 deg Inclination = 5.73806094 deg Eccentricity = 0.16784693 Semimajor axis = 2.20323057 AU Perihelion dist = 1.83342508 AU Mag: H = 12.68, G = 0.15 Epoch of elements : MJD 54282.99200000 TDT (2007 Jul 01.992) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 01 2880 Nihondaira 23h 48.5m UT 7.6 0 24 32.892- 4 38 52.07HIP 1941 9.1 16.3 18 1.2 1.522 3.099 16.12 -270.635 -4.651 -176.15 23.08 23.8082 -.25214 .72686 8.01979 2.79004 -0.00452 -0.00190 2000 31.68940162007 629.00000246.840048 39.748143 5.7380610.167846932.203230571.8334250812.65 0.15 RATE 3.0137981 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.112 0.046 58.7 4.170 0.052 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 01:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org