IOTA/IOTA-ES occultation update for (884) Priamus / TYC 6735-01054-1 event on 2008 May 04, 21:07 UT Visible from India, SW Asia, Europe Summary ------- On 2008 May 04 UT, the 99 km diameter asteroid (884) Priamus will occult a 13.0 mag star in the constellation Hydra for observers along a path across India, SW Asia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 15.3 mag (the magnitude of the asteroid) for at most 6.4 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: 53 * date and approx. time of event: 2008 May 04, 21:02 - 2008 May 04, 21:11 UT * magnitude of target star: 13.0 * magnitude drop [mag]: 2.4 * estimated maximum duration [s]: 6.4 * Moon: 1 % sunlit, 171° distance * Sun: 168° distance * rough path description: India, SW Asia, Europe The occultation path -------------------- * approximate projected width [km]: 150 * 1 sigma uncertainty interval [path widths]: +/- 1.20 * 1 sigma uncertainty interval [seconds]: +/- 10.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .066 +/- .045) * 1 sigma uncertainty ellipse (major, minor, PA): ( .068", .043", 105° ) * approx speed of asteroid's shadow [km/s]: 15.3869 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6735-01054-1 by 884 Priamus on 2008 May 4 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 - 4 44 42 58 0 0 21 11 34 1 146 -7 - 3 10 30 - 6 18 28 0 37 47 ... .. .. - 3 27 36 57 0 0 21 11 33 2 147 -8 - 1 55 31 - 4 59 12 1 47 49 ... .. .. - 2 11 32 56 0 0 21 11 33 3 148 -9 - 0 41 24 - 3 41 10 2 57 24 ... .. .. - 0 56 20 55 0 0 21 11 32 4 149 -10 0 32 2 - 2 24 10 4 6 42 ... .. .. 0 18 11 54 0 0 21 11 31 6 150 -12 1 44 55 - 1 8 1 5 15 48 ... .. .. 1 32 8 53 0 0 21 11 29 7 151 -13 2 57 24 0 7 27 6 24 50 ... .. .. 2 45 40 52 0 0 21 11 28 8 152 -14 4 9 36 1 22 22 7 33 55 ... .. .. 3 58 56 51 0 0 21 11 26 9 153 -15 5 21 38 2 36 52 8 43 9 ... .. .. 5 12 2 50 0 0 21 11 23 11 154 -17 6 33 38 3 51 6 9 52 37 0 39 14 6 25 5 49 0 0 21 11 20 12 155 -18 7 45 43 5 5 10 11 2 25 1 55 51 7 38 13 48 0 0 21 11 17 13 156 -19 8 57 58 6 19 12 12 12 41 3 12 10 8 51 31 47 0 0 21 11 14 14 157 -20 10 10 30 7 33 18 13 23 29 4 28 19 10 5 7 46 0 0 21 11 11 16 158 -22 11 23 25 8 47 36 14 34 55 5 44 25 11 19 7 45 0 0 21 11 7 17 159 -23 12 36 50 10 2 12 15 47 6 7 0 35 12 33 36 44 0 0 21 11 2 18 160 -24 13 50 51 11 17 12 17 0 8 8 16 55 13 48 42 43 0 0 21 10 57 19 161 -26 15 5 35 12 32 43 18 14 7 9 33 33 15 4 32 42 0 0 21 10 52 20 162 -27 16 21 8 13 48 51 19 29 11 10 50 35 16 21 12 41 0 0 21 10 47 22 163 -28 17 37 37 15 5 44 20 45 26 12 8 9 17 38 49 40 0 0 21 10 41 23 164 -30 18 55 10 16 23 28 22 3 1 13 26 20 18 57 30 39 0 0 21 10 35 24 166 -31 20 13 54 17 42 11 23 22 3 14 45 17 20 17 25 38 0 0 21 10 28 25 167 -32 21 33 57 19 2 0 24 42 43 16 5 5 21 38 41 37 0 0 21 10 22 27 168 -34 22 55 29 20 23 4 26 5 10 17 25 54 23 1 28 36 0 0 21 10 14 28 169 -35 24 18 39 21 45 32 27 29 35 18 47 52 24 25 56 35 0 0 21 10 6 29 170 -36 25 43 37 23 9 33 28 56 11 20 11 6 25 52 15 34 0 0 21 9 58 30 172 -38 27 10 37 24 35 18 30 25 12 21 35 47 27 20 40 33 0 0 21 9 49 31 173 -39 28 39 51 26 2 59 31 56 55 23 2 4 28 51 22 32 0 0 21 9 40 32 175 -40 30 11 34 27 32 48 33 31 39 24 30 9 30 24 40 31 0 0 21 9 30 33 176 -42 31 46 4 29 5 1 35 9 45 26 0 14 32 0 50 30 0 0 21 9 20 35 178 -43 33 23 42 30 39 53 36 51 40 27 32 33 33 40 14 29 0 0 21 9 9 36 180 -44 35 4 50 32 17 45 38 37 56 29 7 22 35 23 18 28 0 0 21 8 58 37 182 -45 36 49 57 33 59 0 40 29 12 30 44 59 37 10 31 27 0 0 21 8 46 37 184 -47 38 39 37 35 44 3 42 26 16 32 25 45 39 2 31 26 0 0 21 8 33 38 186 -48 40 34 34 37 33 27 44 30 12 34 10 5 41 0 3 25 0 0 21 8 19 39 188 -49 42 35 39 39 27 53 46 42 23 35 58 27 43 4 5 24 0 0 21 8 4 40 190 -50 44 44 4 41 28 9 49 4 44 37 51 27 Latitude Latitude Latitude Latitude 44 0 0 23 34 5 21 7 58 40 192 -50 24 20 10 22 48 46 26 14 17 21 2 56 45 0 0 23 7 2 21 7 51 40 193 -51 23 52 49 22 22 1 25 46 7 20 36 51 46 0 0 22 40 48 21 7 44 41 194 -51 23 26 17 21 56 4 25 18 47 20 11 31 47 0 0 22 15 23 21 7 37 41 195 -51 23 0 34 21 30 55 24 52 19 19 46 59 48 0 0 21 50 46 21 7 29 41 196 -52 22 35 40 21 6 34 24 26 41 19 23 13 49 0 0 21 26 57 21 7 22 41 198 -52 22 11 36 20 43 1 24 1 55 19 0 13 50 0 0 21 3 57 21 7 15 41 199 -52 21 48 21 20 20 15 23 38 0 18 38 0 51 0 0 20 41 46 21 7 8 41 200 -52 21 25 55 19 58 18 23 14 55 18 16 34 52 0 0 20 20 23 21 7 1 41 201 -52 21 4 18 19 37 8 22 52 42 17 55 54 53 0 0 19 59 49 21 6 54 41 202 -52 20 43 30 19 16 47 22 31 19 17 36 1 54 0 0 19 40 3 21 6 47 41 204 -52 20 23 32 18 57 14 22 10 47 17 16 55 55 0 0 19 21 6 21 6 40 41 205 -52 20 4 22 18 38 28 21 51 6 16 58 36 56 0 0 19 2 57 21 6 33 41 206 -52 19 46 2 18 20 31 21 32 15 16 41 3 57 0 0 18 45 37 21 6 26 41 207 -52 19 28 31 18 3 21 21 14 15 16 24 17 58 0 0 18 29 5 21 6 19 41 208 -52 19 11 49 17 46 59 20 57 6 16 8 17 59 0 0 18 13 22 21 6 13 40 209 -52 18 55 56 17 31 25 20 40 47 15 53 5 60 0 0 17 58 27 21 6 6 40 210 -52 18 40 51 17 16 39 20 25 19 15 38 38 61 0 0 17 44 21 21 5 59 40 211 -52 18 26 36 17 2 41 20 10 41 15 24 59 62 0 0 17 31 2 21 5 52 39 212 -51 18 13 10 16 49 31 19 56 53 15 12 6 63 0 0 17 18 32 21 5 46 39 213 -51 18 0 32 16 37 8 19 43 56 15 0 0 64 0 0 17 6 51 21 5 39 39 214 -51 17 48 43 16 25 33 19 31 48 14 48 40 65 0 0 16 55 57 21 5 33 38 215 -50 17 37 43 16 14 46 19 20 31 14 38 7 66 0 0 16 45 51 21 5 26 38 216 -50 17 27 31 16 4 46 19 10 4 14 28 20 67 0 0 16 36 34 21 5 20 38 217 -49 17 18 9 15 55 34 19 0 27 14 19 20 68 0 0 16 28 5 21 5 14 37 218 -49 17 9 35 15 47 10 18 51 40 14 11 6 69 0 0 16 20 24 21 5 7 37 219 -49 17 1 49 15 39 33 18 43 43 14 3 39 70 0 0 16 13 31 21 5 1 36 220 -48 16 54 52 15 32 44 18 36 36 13 56 59 71 0 0 16 7 26 21 4 55 36 221 -47 16 48 44 15 26 42 18 30 19 13 51 4 72 0 0 16 2 10 21 4 49 35 222 -47 16 43 25 15 21 29 18 24 52 13 45 57 73 0 0 15 57 41 21 4 43 34 222 -46 16 38 54 15 17 2 18 20 15 13 41 36 74 0 0 15 54 1 21 4 37 34 223 -46 16 35 11 15 13 24 18 16 28 13 38 1 75 0 0 15 51 9 21 4 32 33 224 -45 16 32 18 15 10 33 18 13 31 13 35 13 76 0 0 15 49 5 21 4 26 33 225 -44 16 30 13 15 8 30 18 11 24 13 33 12 77 0 0 15 47 49 21 4 21 32 225 -44 16 28 57 15 7 15 18 10 7 13 31 57 78 0 0 15 47 22 21 4 15 31 226 -43 16 28 30 15 6 47 18 9 40 13 31 30 79 0 0 15 47 43 21 4 10 31 227 -42 16 28 52 15 7 7 18 10 4 13 31 48 80 0 0 15 48 52 21 4 5 30 227 -42 16 30 2 15 8 16 18 11 18 13 32 54 81 0 0 15 50 50 21 3 59 29 228 -41 16 32 2 15 10 12 18 13 22 13 34 47 82 0 0 15 53 37 21 3 54 29 228 -40 16 34 51 15 12 57 18 16 17 13 37 26 83 0 0 15 57 12 21 3 50 28 229 -39 16 38 29 15 16 29 18 20 2 13 40 53 84 0 0 16 1 36 21 3 45 27 230 -38 16 42 57 15 20 50 18 24 38 13 45 7 85 0 0 16 6 49 21 3 40 26 230 -38 16 48 13 15 25 59 18 30 4 13 50 8 86 0 0 16 12 51 21 3 36 25 231 -37 16 54 20 15 31 57 18 36 22 13 55 57 87 0 0 16 19 43 21 3 31 25 231 -36 17 1 16 15 38 44 18 43 31 14 2 33 88 0 0 16 27 23 21 3 27 24 232 -35 17 9 2 15 46 19 18 51 31 14 9 56 89 0 0 16 35 53 21 3 23 23 232 -34 17 17 37 15 54 43 19 0 22 14 18 7 90 0 0 16 45 12 21 3 19 22 233 -33 17 27 3 16 3 56 19 10 5 14 27 6 91 0 0 16 55 21 21 3 15 21 233 -33 17 37 19 16 13 58 19 20 39 14 36 53 92 0 0 17 6 20 21 3 11 20 233 -32 17 48 26 16 24 50 19 32 5 14 47 28 93 0 0 17 18 9 21 3 7 20 234 -31 18 0 23 16 36 31 19 44 24 14 58 52 94 0 0 17 30 48 21 3 4 19 234 -30 18 13 10 16 49 1 19 57 34 15 11 3 95 0 0 17 44 17 21 3 1 18 235 -29 18 26 49 17 2 21 20 11 37 15 24 3 96 0 0 17 58 36 21 2 57 17 235 -28 18 41 19 17 16 31 20 26 33 15 37 52 97 0 0 18 13 47 21 2 54 16 236 -27 18 56 40 17 31 32 20 42 21 15 52 30 98 0 0 18 29 48 21 2 52 15 236 -26 19 12 52 17 47 22 20 59 3 16 7 56 99 0 0 18 46 40 21 2 49 14 236 -25 19 29 56 18 4 3 21 16 38 16 24 12 100 0 0 19 4 23 21 2 46 13 237 -24 19 47 52 18 21 34 21 35 6 16 41 17 101 0 0 19 22 58 21 2 44 12 237 -23 20 6 39 18 39 56 21 54 28 16 59 11 102 0 0 19 42 24 21 2 42 11 237 -22 20 26 19 18 59 9 22 14 43 17 17 54 103 0 0 20 2 41 21 2 40 10 238 -21 20 46 51 19 19 13 22 35 53 17 37 28 104 0 0 20 23 51 21 2 38 9 238 -20 21 8 15 19 40 8 22 57 57 17 57 51 105 0 0 20 45 52 21 2 36 8 239 -19 21 30 33 20 1 54 23 20 55 18 19 3 106 0 0 21 8 45 21 2 35 7 239 -18 21 53 42 20 24 32 23 44 48 .. .. .. 107 0 0 21 32 31 21 2 33 6 239 -17 22 17 45 20 48 1 24 9 36 .. .. .. 108 0 0 21 57 9 21 2 32 5 240 -16 22 42 41 21 12 22 24 35 19 .. .. .. 109 0 0 22 22 39 21 2 31 4 240 -15 23 8 29 21 37 34 25 1 56 .. .. .. 110 0 0 22 49 1 21 2 31 3 241 -14 23 35 11 22 3 38 25 29 29 .. .. .. 111 0 0 23 16 16 21 2 30 2 241 -13 24 2 46 22 30 34 25 57 58 .. .. .. 112 0 0 23 44 23 21 2 30 1 241 -12 24 31 15 22 58 21 .. .. .. .. .. .. 113 0 0 24 13 23 21 2 30 0 242 -11 .. .. .. 23 27 0 .. .. .. .. .. .. Uncertainty in time = +/- 12 secs [Prediction of 2008 Apr 23.0] Data for the target star ------------------------ * name: TYC 6735-01054-1 * constellation : Hydra * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 14 16 50.1165 DE: -25 30 58.443 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .032, .031 ) * V mag [mag]: 13.0 * B mag [mag]: 13.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (884) Priamus approx. diameter [km]: 99 approx. diameter ["]: .036 distance from Earth [AU]: 3.75600 * orbital information: orbit source: Preston date of fit: 2008 Apr 22 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 783 number of rejected observations: 54 time covered by the observations: 1917 Nov 08 - 2008 Apr 18 1 sigma uncertainty ellipse (major, minor, PA): 0.060, 0.030, 109° remarks: * orbital elements for (884) Priamus : Mean anomaly = 316.17057226 deg Arg. of pericenter = 334.25874265 deg Long. of node = 301.64526137 deg Inclination = 8.92719362 deg Eccentricity = 0.12211310 Semimajor axis = 5.16029463 AU Perihelion dist = 4.53015504 AU Mag: H = 8.57, G = 0.15 Epoch of elements : MJD 54590.88000000 TDT (2008 May 04.880) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 4 884 Priamus 21h 7.0m UT 13.0 14 16 50.117-25 30 58.44TYC 6735-01054-1 13.2 15.3 99 6.4 3.756 -1.394 7.57 34.3308 -25.518 -137.58 16.27 21.1173 0.28015 0.69849 -8.06073 3.23262 0.00078 0.00093 2000 316.0965822008 5 4.00000334.258743301.645261 8.9271940.12211310 5.1602946 4.5301551 8.8 5.00.15 RATE 0.8407990 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.068 0.043 105 2.20 0.043 0 54579.5020080504_1054-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 23, 03:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org