IOTA/IOTA-ES occultation update for (5838) Hamsun / TYC 0452-00385-1 event on 2009 Jul 06, 22:21 UT Visible from Summary ------- On 2009 Jul 06 UT, the 13 km diameter asteroid (5838) Hamsun will occult a 9.6 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.5 mag to 15.1 mag (the magnitude of the asteroid) for at most 1.5 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: 12 * date and approx. time of event: 2009 Jul 06, 22:12 - 2009 Jul 06, 22:30 UT * magnitude of target star: 9.6 * magnitude drop [mag]: 5.5 * estimated maximum duration [s]: 1.5 * Moon: 100 % sunlit, 27° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 5.68 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .153 +/- .076) * 1 sigma uncertainty ellipse (major, minor, PA): ( .153", .076", 87° ) * approx speed of asteroid's shadow [km/s]: 8.4874 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0452-00385-1 by 5838 Hamsun on 2009 Jul 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 ' " Latitude Latitude Latitude Latitude - 53 0 0 28 6 41 22 30 25 17 96 0 28 11 18 28 2 5 29 4 3 27 10 7 - 52 0 0 28 14 16 22 30 20 17 97 -1 28 18 53 28 9 40 29 11 40 27 17 40 - 51 0 0 28 22 5 22 30 16 18 97 -2 28 26 42 28 17 28 29 19 30 27 25 27 - 50 0 0 28 30 8 22 30 11 19 98 -3 28 34 45 28 25 31 29 27 35 27 33 28 - 49 0 0 28 38 23 22 30 6 20 98 -3 28 43 1 28 33 46 29 35 53 27 41 42 - 48 0 0 28 46 52 22 30 1 21 99 -4 28 51 30 28 42 15 29 44 24 27 50 9 - 47 0 0 28 55 34 22 29 56 22 99 -5 29 0 12 28 50 57 29 53 8 27 58 48 - 46 0 0 29 4 29 22 29 50 22 100 -5 29 9 7 28 59 52 30 2 5 28 7 41 - 45 0 0 29 13 36 22 29 44 23 101 -6 29 18 14 29 8 59 30 11 14 28 16 46 - 44 0 0 29 22 56 22 29 38 24 101 -7 29 27 34 29 18 18 30 20 36 28 26 4 - 43 0 0 29 32 28 22 29 32 25 102 -7 29 37 6 29 27 50 30 30 10 28 35 33 - 42 0 0 29 42 11 22 29 26 26 102 -8 29 46 50 29 37 33 30 39 56 28 45 14 - 41 0 0 29 52 7 22 29 20 26 103 -9 29 56 45 29 47 28 30 49 54 28 55 7 - 40 0 0 30 2 13 22 29 13 27 104 -9 30 6 52 29 57 35 31 0 3 29 5 12 - 39 0 0 30 12 31 22 29 6 28 104 -10 30 17 10 30 7 52 31 10 23 29 15 27 - 38 0 0 30 23 0 22 28 59 29 105 -10 30 27 39 30 18 21 31 20 55 29 25 53 - 37 0 0 30 33 39 22 28 52 29 106 -11 30 38 19 30 29 0 31 31 37 29 36 30 - 36 0 0 30 44 29 22 28 45 30 107 -12 30 49 9 30 39 50 31 42 29 29 47 18 - 35 0 0 30 55 29 22 28 38 31 107 -12 31 0 9 30 50 50 31 53 32 29 58 15 - 34 0 0 31 6 39 22 28 30 32 108 -13 31 11 19 31 2 0 32 4 45 30 9 23 - 33 0 0 31 17 59 22 28 22 32 109 -13 31 22 39 31 13 19 32 16 7 30 20 40 - 32 0 0 31 29 28 22 28 15 33 110 -14 31 34 9 31 24 48 32 27 39 30 32 7 - 31 0 0 31 41 7 22 28 7 34 110 -14 31 45 47 31 36 26 32 39 20 30 43 43 - 30 0 0 31 52 54 22 27 58 34 111 -15 31 57 35 31 48 13 32 51 10 30 55 27 - 29 0 0 32 4 50 22 27 50 35 112 -15 32 9 31 32 0 9 33 3 9 31 7 21 - 28 0 0 32 16 54 22 27 42 36 113 -16 32 21 36 32 12 13 33 15 16 31 19 23 - 27 0 0 32 29 7 22 27 33 37 114 -16 32 33 48 32 24 25 33 27 31 31 31 32 - 26 0 0 32 41 27 22 27 25 37 115 -17 32 46 9 32 36 46 33 39 54 31 43 50 - 25 0 0 32 53 55 22 27 16 38 116 -17 32 58 37 32 49 13 33 52 24 31 56 16 - 24 0 0 33 6 30 22 27 7 38 117 -18 33 11 12 33 1 48 34 5 2 32 8 48 - 23 0 0 33 19 12 22 26 58 39 118 -18 33 23 55 33 14 30 34 17 47 32 21 28 - 22 0 0 33 32 1 22 26 49 40 119 -19 33 36 44 33 27 19 34 30 39 32 34 14 - 21 0 0 33 44 57 22 26 40 40 120 -19 33 49 40 33 40 14 34 43 37 32 47 7 - 20 0 0 33 57 58 22 26 31 41 121 -19 34 2 42 33 53 16 34 56 41 33 0 7 - 19 0 0 34 11 6 22 26 22 41 122 -20 34 15 49 34 6 23 35 9 51 33 13 12 - 18 0 0 34 24 19 22 26 12 42 123 -20 34 29 3 34 19 36 35 23 7 33 26 23 - 17 0 0 34 37 38 22 26 3 43 124 -21 34 42 21 34 32 54 35 36 28 33 39 39 - 16 0 0 34 51 1 22 25 54 43 125 -21 34 55 45 34 46 18 35 49 54 33 53 0 - 15 0 0 35 4 30 22 25 44 44 126 -21 35 9 14 34 59 46 36 3 25 34 6 26 - 14 0 0 35 18 3 22 25 34 44 127 -22 35 22 47 35 13 19 36 17 0 34 19 57 - 13 0 0 35 31 40 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22 23 5 49 148 -25 38 51 47 38 42 14 39 46 26 37 48 27 2 0 0 39 1 6 22 22 54 49 149 -25 39 5 53 38 56 20 40 0 34 38 2 32 3 0 0 39 15 12 22 22 44 50 151 -25 39 19 59 39 10 26 40 14 41 38 16 36 4 0 0 39 29 17 22 22 34 50 152 -25 39 34 4 39 24 31 40 28 47 38 30 40 5 0 0 39 43 21 22 22 24 50 154 -25 39 48 8 39 38 35 40 42 52 38 44 43 6 0 0 39 57 24 22 22 14 50 155 -25 40 2 11 39 52 38 40 56 56 38 58 45 7 0 0 40 11 26 22 22 4 50 157 -25 40 16 13 40 6 39 41 10 58 39 12 46 8 0 0 40 25 26 22 21 54 50 158 -25 40 30 13 40 20 39 41 24 59 39 26 45 9 0 0 40 39 24 22 21 44 50 160 -25 40 44 11 40 34 37 41 38 58 39 40 43 10 0 0 40 53 20 22 21 34 50 161 -25 40 58 7 40 48 33 41 52 54 39 54 38 11 0 0 41 7 13 22 21 24 50 163 -25 41 12 0 41 2 26 42 6 48 40 8 31 12 0 0 41 21 4 22 21 14 50 164 -25 41 25 51 41 16 17 42 20 39 40 22 21 13 0 0 41 34 51 22 21 4 50 166 -25 41 39 39 41 30 4 42 34 28 40 36 8 14 0 0 41 48 36 22 20 54 50 168 -25 41 53 23 41 43 49 42 48 12 40 49 53 15 0 0 42 2 17 22 20 44 50 169 -25 42 7 4 41 57 30 43 1 54 41 3 34 16 0 0 42 15 54 22 20 35 50 171 -25 42 20 42 42 11 7 43 15 31 41 17 11 17 0 0 42 29 28 22 20 25 50 172 -25 42 34 15 42 24 41 43 29 5 41 30 45 18 0 0 42 42 57 22 20 15 50 174 -24 42 47 45 42 38 10 43 42 34 41 44 14 19 0 0 42 56 22 22 20 6 50 175 -24 43 1 10 42 51 36 43 55 59 41 57 40 20 0 0 43 9 43 22 19 56 49 177 -24 43 14 30 43 4 56 44 9 19 42 11 0 21 0 0 43 22 59 22 19 47 49 178 -24 43 27 46 43 18 12 44 22 34 42 24 16 22 0 0 43 36 9 22 19 37 49 180 -24 43 40 56 43 31 22 44 35 44 42 37 28 23 0 0 43 49 15 22 19 28 49 181 -24 43 54 2 43 44 28 44 48 49 42 50 34 24 0 0 44 2 14 22 19 18 48 182 -23 44 7 2 43 57 28 45 1 48 43 3 34 25 0 0 44 15 9 22 19 9 48 184 -23 44 19 56 44 10 22 45 14 41 43 16 29 26 0 0 44 27 57 22 19 0 48 185 -23 44 32 44 44 23 11 45 27 29 43 29 19 27 0 0 44 40 40 22 18 51 48 187 -23 44 45 26 44 35 53 45 40 10 43 42 2 28 0 0 44 53 16 22 18 42 47 188 -23 44 58 2 44 48 29 45 52 45 43 54 39 29 0 0 45 5 45 22 18 33 47 190 -22 45 10 32 45 0 59 46 5 14 44 7 10 30 0 0 45 18 9 22 18 24 47 191 -22 45 22 55 45 13 22 46 17 35 44 19 34 31 0 0 45 30 25 22 18 15 46 192 -22 45 35 11 45 25 39 46 29 50 44 31 52 32 0 0 45 42 34 22 18 7 46 194 -22 45 47 21 45 37 48 46 41 58 44 44 3 33 0 0 45 54 36 22 17 58 46 195 -21 45 59 23 45 49 51 46 53 59 44 56 6 34 0 0 46 6 31 22 17 50 45 196 -21 46 11 17 46 1 46 47 5 52 45 8 3 35 0 0 46 18 19 22 17 41 45 197 -21 46 23 5 46 13 33 47 17 38 45 19 52 36 0 0 46 29 59 22 17 33 45 199 -21 46 34 45 46 25 13 47 29 16 45 31 34 37 0 0 46 41 31 22 17 25 44 200 -20 46 46 16 46 36 45 47 40 46 45 43 8 38 0 0 46 52 55 22 17 16 44 201 -20 46 57 41 46 48 10 47 52 8 45 54 34 39 0 0 47 4 11 22 17 8 43 202 -20 47 8 57 46 59 26 48 3 23 46 5 52 40 0 0 47 15 19 22 17 0 43 204 -19 47 20 4 47 10 34 48 14 29 46 17 2 41 0 0 47 26 19 22 16 52 42 205 -19 47 31 4 47 21 34 48 25 26 46 28 3 42 0 0 47 37 10 22 16 45 42 206 -19 47 41 55 47 32 26 48 36 15 46 38 57 43 0 0 47 47 53 22 16 37 42 207 -18 47 52 37 47 43 8 48 46 55 46 49 41 44 0 0 47 58 27 22 16 29 41 208 -18 48 3 11 47 53 42 48 57 27 47 0 18 45 0 0 48 8 52 22 16 22 41 210 -18 48 13 36 48 4 8 49 7 50 47 10 45 46 0 0 48 19 8 22 16 14 40 211 -17 48 23 52 48 14 24 49 18 3 47 21 4 47 0 0 48 29 15 22 16 7 40 212 -17 48 33 59 48 24 31 49 28 8 47 31 13 48 0 0 48 39 13 22 16 0 39 213 -17 48 43 57 48 34 30 49 38 4 47 41 14 49 0 0 48 49 2 22 15 53 39 214 -16 48 53 45 48 44 19 49 47 50 47 51 5 50 0 0 48 58 41 22 15 46 38 215 -16 49 3 25 48 53 58 49 57 27 48 0 47 51 0 0 49 8 11 22 15 39 38 216 -15 49 12 54 49 3 29 50 6 54 48 10 19 52 0 0 49 17 32 22 15 32 37 217 -15 49 22 15 49 12 49 50 16 12 48 19 42 53 0 0 49 26 43 22 15 25 37 218 -15 49 31 25 49 22 0 50 25 20 48 28 56 54 0 0 49 35 44 22 15 19 36 219 -14 49 40 26 49 31 2 50 34 18 48 38 0 55 0 0 49 44 35 22 15 12 36 220 -14 49 49 18 49 39 54 50 43 7 48 46 54 56 0 0 49 53 17 22 15 6 35 221 -13 49 57 59 49 48 35 50 51 46 48 55 38 57 0 0 50 1 49 22 15 0 35 222 -13 50 6 31 49 57 7 51 0 15 49 4 13 58 0 0 50 10 11 22 14 53 34 223 -13 50 14 52 50 5 29 51 8 34 49 12 37 59 0 0 50 18 22 22 14 47 34 224 -12 50 23 4 50 13 41 51 16 43 49 20 51 60 0 0 50 26 24 22 14 41 33 225 -12 50 31 5 50 21 43 51 24 41 49 28 56 61 0 0 50 34 15 22 14 36 33 226 -11 50 38 56 50 29 35 51 32 30 49 36 50 62 0 0 50 41 56 22 14 30 32 227 -11 50 46 37 50 37 16 51 40 8 49 44 34 63 0 0 50 49 27 22 14 24 31 228 -10 50 54 8 50 44 47 51 47 36 49 52 7 64 0 0 50 56 48 22 14 19 31 229 -10 51 1 28 50 52 8 51 54 54 49 59 31 65 0 0 51 3 58 22 14 13 30 230 -9 51 8 38 50 59 19 52 2 2 50 6 44 66 0 0 51 10 58 22 14 8 30 231 -9 51 15 38 51 6 19 52 8 59 50 13 46 67 0 0 51 17 47 22 14 2 29 232 -9 51 22 27 51 13 8 52 15 45 50 20 38 68 0 0 51 24 26 22 13 57 29 233 -8 51 29 5 51 19 47 52 22 21 50 27 19 69 0 0 51 30 54 22 13 52 28 234 -8 51 35 33 51 26 16 52 28 47 50 33 50 70 0 0 51 37 12 22 13 47 28 235 -7 51 41 51 51 32 33 52 35 2 50 40 11 71 0 0 51 43 19 22 13 43 27 236 -7 51 47 58 51 38 41 52 41 6 50 46 20 72 0 0 51 49 16 22 13 38 26 236 -6 51 53 54 51 44 37 52 47 0 50 52 19 73 0 0 51 55 1 22 13 33 26 237 -6 51 59 39 51 50 23 52 52 43 50 58 7 74 0 0 52 0 36 22 13 29 25 238 -5 52 5 14 51 55 58 52 58 15 51 3 45 75 0 0 52 6 0 22 13 24 25 239 -5 52 10 38 52 1 23 53 3 37 51 9 12 76 0 0 52 11 14 22 13 20 24 240 -4 52 15 52 52 6 37 53 8 48 51 14 27 77 0 0 52 16 17 22 13 16 24 241 -4 52 20 54 52 11 39 53 13 48 51 19 32 78 0 0 52 21 8 22 13 12 23 242 -3 52 25 46 52 16 31 53 18 38 51 24 27 79 0 0 52 25 49 22 13 8 23 243 -3 52 30 26 52 21 13 53 23 16 51 29 10 80 0 0 52 30 19 22 13 4 22 243 -2 52 34 56 52 25 43 53 27 44 51 33 42 81 0 0 52 34 39 22 13 0 21 244 -2 52 39 15 52 30 2 53 32 1 51 38 3 82 0 0 52 38 47 22 12 56 21 245 -1 52 43 23 52 34 11 53 36 7 51 42 14 83 0 0 52 42 44 22 12 52 20 246 -1 52 47 21 52 38 8 53 40 2 51 46 13 84 0 0 52 46 31 22 12 49 20 247 0 52 51 7 52 41 55 53 43 47 51 50 1 Uncertainty in time = +/- 17 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0452-00385-1 * constellation : Serpens * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 48 20.2996 DE: +02 27 15.555 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .027, .021 ) * V mag [mag]: 9.6 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5838) Hamsun approx. diameter [km]: 13 approx. diameter ["]: .014 distance from Earth [AU]: 1.29800 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 541 number of rejected observations: 8 time covered by the observations: 1973 Sep 19 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.151, 0.073, 87° remarks: * orbital elements for (5838) Hamsun : Mean anomaly = 28.56900232 deg Arg. of pericenter = 59.99306532 deg Long. of node = 186.57200435 deg Inclination = 14.35294025 deg Eccentricity = 0.13568590 Semimajor axis = 2.55022585 AU Perihelion dist = 2.20419614 AU Mag: H = 13.20, G = 0.15 Epoch of elements : MJD 55018.93100000 TDT (2009 Jul 06.931) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jul 6 5838 Hamsun 22h 21.5m UT 9.6 18 48 20.300 2 27 15.56TYC 0452-00385-1 10.5 15.1 13 1.5 1.298 -2.107 -7.46 21.6920 2.458 -154.14 22.60 22.3576 -0.14632 0.62065 -4.66275 -1.09903 0.00034 -0.00223 2000 26.4075972009 628.00000 59.993065186.572004 14.3529400.13568590 2.5502259 2.204196212.1 5.00.15 RATE 2.4201150 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.153 0.076 87 6.68 0.078 0 54581.5020090706_0385-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org