IOTA/IOTA-ES occultation update for (1072) Malva / TYC 6788-00413-1 event on 2009 Jun 07, 08:30 UT Visible from Summary ------- On 2009 Jun 07 UT, the 45 km diameter asteroid (1072) Malva will occult a 9.4 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.7 mag to 16.1 mag (the magnitude of the asteroid) for at most 2.8 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: 47 * date and approx. time of event: 2009 Jun 07, 08:26 - 2009 Jun 07, 08:34 UT * magnitude of target star: 9.4 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 2.8 * Moon: 100 % sunlit, 7° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 79 * 1 sigma uncertainty interval [path widths]: +/- 1.36 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .028", 103° ) * approx speed of asteroid's shadow [km/s]: 15.8508 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6788-00413-1 by 1072 Malva on 2009 Jun 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 ' " Longitude Longitude Longitude Longitude 172 5 56 50 0 0 8 34 17 4 140 -1 172 53 38 171 18 36 175 5 27 ... .. .. 173 39 1 49 0 0 8 34 15 5 141 -2 174 26 33 172 51 53 176 37 58 ... .. .. 175 13 19 48 0 0 8 34 14 6 143 -3 176 0 45 174 26 18 178 12 2 ... .. .. 176 49 2 47 0 0 8 34 11 8 144 -5 177 36 28 176 2 2 179 47 54 173 56 17 178 26 24 46 0 0 8 34 9 9 145 -6 179 13 57 177 39 20 -178 34 11 175 33 30 -179 54 19 45 0 0 8 34 5 11 146 -8 -179 6 34 179 18 26 -176 53 56 177 12 15 -178 12 51 44 0 0 8 34 2 12 148 -9 -177 24 46 -179 0 24 -175 11 2 178 52 48 -176 28 54 43 0 0 8 33 57 14 149 -11 -175 40 21 -177 16 52 -173 25 7 -179 24 36 -174 42 5 42 0 0 8 33 52 15 150 -13 -173 52 56 -175 30 36 -171 35 46 -177 39 37 -172 52 0 41 0 0 8 33 46 17 152 -14 -172 2 5 -173 41 14 -169 42 27 -175 51 56 -170 58 11 40 0 0 8 33 40 18 153 -16 -170 7 17 -171 48 19 -167 44 35 -174 1 7 -169 0 2 39 0 0 8 33 32 20 155 -18 -168 7 55 -169 51 17 -165 41 24 -172 6 44 -166 56 51 38 0 0 8 33 24 22 156 -19 -166 3 14 -167 49 29 -163 31 57 -170 8 12 Latitude Latitude Latitude Latitude -166 0 0 37 33 13 8 33 20 22 157 -20 37 58 29 37 8 15 39 8 53 36 1 51 -165 0 0 37 5 34 8 33 16 23 158 -21 37 30 38 36 40 48 38 40 28 35 34 52 -164 0 0 36 38 34 8 33 12 24 159 -22 37 3 27 36 13 59 38 12 44 35 8 31 -163 0 0 36 12 13 8 33 7 24 160 -23 36 36 55 35 47 49 37 45 41 34 42 48 -162 0 0 35 46 33 8 33 2 25 160 -24 36 11 4 35 22 18 37 19 18 34 17 44 -161 0 0 35 21 32 8 32 58 26 161 -24 35 45 53 34 57 28 36 53 38 33 53 18 -160 0 0 34 57 12 8 32 53 26 162 -25 35 21 23 34 33 17 36 28 39 33 29 32 -159 0 0 34 33 32 8 32 48 27 163 -26 34 57 34 34 9 47 36 4 22 33 6 25 -158 0 0 34 10 34 8 32 43 28 164 -27 34 34 26 33 46 57 35 40 47 32 43 58 -157 0 0 33 48 16 8 32 38 28 165 -27 34 12 0 33 24 48 35 17 55 32 22 11 -156 0 0 33 26 40 8 32 32 29 166 -28 33 50 15 33 3 20 34 55 46 32 1 4 -155 0 0 33 5 45 8 32 27 29 167 -29 33 29 12 32 42 33 34 34 19 31 40 38 -154 0 0 32 45 32 8 32 22 30 168 -29 33 8 51 32 22 28 34 13 36 31 20 52 -153 0 0 32 26 1 8 32 16 30 169 -30 32 49 12 32 3 4 33 53 35 31 1 47 -152 0 0 32 7 12 8 32 11 31 170 -31 32 30 16 31 44 21 33 34 18 30 43 23 -151 0 0 31 49 4 8 32 5 31 171 -31 32 12 2 31 26 21 33 15 44 30 25 40 -150 0 0 31 31 40 8 31 59 32 172 -32 31 54 30 31 9 2 32 57 53 30 8 37 -149 0 0 31 14 57 8 31 54 32 172 -33 31 37 41 30 52 26 32 40 46 29 52 17 -148 0 0 30 58 57 8 31 48 32 174 -33 31 21 35 30 36 31 32 24 23 29 36 37 -147 0 0 30 43 39 8 31 42 33 175 -34 31 6 12 30 21 19 32 8 43 29 21 39 -146 0 0 30 29 3 8 31 36 33 176 -34 30 51 31 30 6 49 31 53 46 29 7 23 -145 0 0 30 15 11 8 31 30 33 177 -35 30 37 33 29 53 1 31 39 34 28 53 48 -144 0 0 30 2 1 8 31 24 33 178 -35 30 24 18 29 39 56 31 26 5 28 40 54 -143 0 0 29 49 33 8 31 18 34 179 -36 30 11 46 29 27 33 31 13 20 28 28 43 -142 0 0 29 37 49 8 31 13 34 180 -36 29 59 57 29 15 52 31 1 19 28 17 13 -141 0 0 29 26 47 8 31 7 34 181 -36 29 48 51 29 4 54 30 50 1 28 6 25 -140 0 0 29 16 27 8 31 0 34 182 -37 29 38 29 28 54 39 30 39 28 27 56 18 -139 0 0 29 6 51 8 30 54 34 183 -37 29 28 49 28 45 6 30 29 38 27 46 54 -138 0 0 28 57 58 8 30 48 34 184 -37 29 19 52 28 36 15 30 20 33 27 38 12 -137 0 0 28 49 47 8 30 42 35 185 -38 29 11 39 28 28 8 30 12 11 27 30 11 -136 0 0 28 42 19 8 30 36 35 186 -38 29 4 8 28 20 42 30 4 33 27 22 53 -135 0 0 28 35 35 8 30 30 35 187 -38 28 57 21 28 14 0 29 57 39 27 16 16 -134 0 0 28 29 33 8 30 24 35 188 -39 28 51 17 28 8 0 29 51 29 27 10 21 -133 0 0 28 24 14 8 30 18 35 189 -39 28 45 57 28 2 43 29 46 3 27 5 9 -132 0 0 28 19 38 8 30 12 34 190 -39 28 41 19 27 58 9 29 41 21 27 0 38 -131 0 0 28 15 45 8 30 6 34 191 -39 28 37 25 27 54 17 29 37 23 26 56 50 -130 0 0 28 12 35 8 30 0 34 192 -39 28 34 14 27 51 8 29 34 9 26 53 44 -129 0 0 28 10 8 8 29 54 34 193 -39 28 31 46 27 48 42 29 31 39 26 51 20 -128 0 0 28 8 24 8 29 48 34 194 -39 28 30 2 27 46 59 29 29 53 26 49 38 -127 0 0 28 7 24 8 29 42 34 195 -39 28 29 1 27 45 58 29 28 52 26 48 38 -126 0 0 28 7 6 8 29 36 33 196 -39 28 28 43 27 45 40 29 28 34 26 48 20 -125 0 0 28 7 31 8 29 30 33 197 -39 28 29 9 27 46 6 29 29 0 26 48 45 -124 0 0 28 8 40 8 29 25 33 198 -39 28 30 18 27 47 14 29 30 11 26 49 52 -123 0 0 28 10 32 8 29 19 33 199 -39 28 32 10 27 49 5 29 32 5 26 51 41 -122 0 0 28 13 7 8 29 13 32 200 -39 28 34 46 27 51 39 29 34 44 26 54 12 -121 0 0 28 16 25 8 29 7 32 201 -39 28 38 6 27 54 55 29 38 7 26 57 26 -120 0 0 28 20 26 8 29 2 32 202 -38 28 42 8 27 58 55 29 42 14 27 1 22 -119 0 0 28 25 10 8 28 56 31 203 -38 28 46 55 28 3 38 29 47 6 27 6 0 -118 0 0 28 30 38 8 28 51 31 204 -38 28 52 25 28 9 4 29 52 42 27 11 20 -117 0 0 28 36 49 8 28 45 30 205 -38 28 58 38 28 15 12 29 59 2 27 17 23 -116 0 0 28 43 43 8 28 40 30 206 -37 29 5 35 28 22 4 30 6 6 27 24 9 -115 0 0 28 51 21 8 28 35 29 207 -37 29 13 15 28 29 39 30 13 55 27 31 36 -114 0 0 28 59 42 8 28 29 29 208 -37 29 21 39 28 37 57 30 22 28 27 39 46 -113 0 0 29 8 47 8 28 24 28 209 -36 29 30 47 28 46 58 30 31 46 27 48 39 -112 0 0 29 18 34 8 28 19 28 209 -36 29 40 39 28 56 42 30 41 48 27 58 14 -111 0 0 29 29 5 8 28 14 27 210 -36 29 51 14 29 7 10 30 52 34 28 8 31 -110 0 0 29 40 20 8 28 9 27 211 -35 30 2 32 29 18 20 31 4 5 28 19 31 -109 0 0 29 52 18 8 28 5 26 212 -35 30 14 35 29 30 13 31 16 20 28 31 13 -108 0 0 30 4 59 8 28 0 25 213 -34 30 27 21 29 42 50 31 29 20 28 43 37 -107 0 0 30 18 24 8 27 55 25 213 -34 30 40 51 29 56 10 31 43 5 28 56 44 -106 0 0 30 32 32 8 27 51 24 214 -33 30 55 4 30 10 12 31 57 34 29 10 33 -105 0 0 30 47 23 8 27 47 23 215 -32 31 10 1 30 24 58 32 12 47 29 25 5 -104 0 0 31 2 58 8 27 42 23 216 -32 31 25 42 30 40 27 32 28 45 29 40 19 -103 0 0 31 19 16 8 27 38 22 216 -31 31 42 6 30 56 39 32 45 28 29 56 15 -102 0 0 31 36 17 8 27 34 21 217 -31 31 59 14 31 13 34 33 2 55 30 12 53 -101 0 0 31 54 1 8 27 30 20 218 -30 32 17 5 31 31 11 33 21 6 30 30 13 -100 0 0 32 12 29 8 27 27 20 218 -29 32 35 40 31 49 32 33 40 2 30 48 16 - 99 0 0 32 31 39 8 27 23 19 219 -29 32 54 58 32 8 35 33 59 42 31 7 0 - 98 0 0 32 51 33 8 27 19 18 220 -28 33 15 0 32 28 21 34 20 6 31 26 26 - 97 0 0 33 12 9 8 27 16 17 220 -27 33 35 44 32 48 49 34 41 15 31 46 34 - 96 0 0 33 33 28 8 27 13 17 221 -26 33 57 12 33 10 0 35 3 7 32 7 24 - 95 0 0 33 55 30 8 27 10 16 222 -26 34 19 22 33 31 53 35 25 43 32 28 54 - 94 0 0 34 18 14 8 27 7 15 222 -25 34 42 15 33 54 28 35 49 3 32 51 6 - 93 0 0 34 41 40 8 27 4 14 223 -24 35 5 51 34 17 45 36 13 7 33 13 59 - 92 0 0 35 5 48 8 27 1 13 224 -23 35 30 9 34 41 43 36 37 54 33 37 33 - 91 0 0 35 30 37 8 26 59 12 224 -23 35 55 9 35 6 23 37 3 24 34 1 47 - 90 0 0 35 56 9 8 26 57 11 225 -22 36 20 51 35 31 44 37 29 37 34 26 42 - 89 0 0 36 22 21 8 26 55 11 226 -21 36 47 14 35 57 45 37 56 32 34 52 16 - 88 0 0 36 49 14 8 26 53 10 226 -20 37 14 19 36 24 27 38 24 10 35 18 30 - 87 0 0 37 16 48 8 26 51 9 227 -19 37 42 4 36 51 49 38 52 30 35 45 23 - 86 0 0 37 45 1 8 26 49 8 227 -18 38 10 30 37 19 51 39 21 32 36 12 55 - 85 0 0 38 13 54 8 26 48 7 228 -18 38 39 36 37 48 32 39 51 14 36 41 5 - 84 0 0 38 43 27 8 26 46 6 229 -17 39 9 21 38 17 52 40 21 38 37 9 53 - 83 0 0 39 13 38 8 26 45 5 229 -16 39 39 45 38 47 50 40 52 41 .. .. .. - 82 0 0 39 44 27 8 26 44 4 230 -15 40 10 48 39 18 26 41 24 24 .. .. .. - 81 0 0 40 15 53 8 26 44 3 231 -14 40 42 29 39 49 39 41 56 46 .. .. .. - 80 0 0 40 47 56 8 26 43 2 231 -13 41 14 46 40 21 28 42 29 47 .. .. .. - 79 0 0 41 20 35 8 26 43 1 232 -12 41 47 40 40 53 53 43 3 25 .. .. .. - 78 0 0 41 53 49 8 26 43 1 233 -11 42 21 10 41 26 52 .. .. .. .. .. .. Uncertainty in time = +/- 6 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 6788-00413-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 07 13.8178 DE: -26 33 03.433 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .020 ) * V mag [mag]: 9.4 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1072) Malva approx. diameter [km]: 45 approx. diameter ["]: .021 distance from Earth [AU]: 2.92800 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 666 number of rejected observations: 49 time covered by the observations: 1926 Oct 04 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.039, 0.020, 108° remarks: * orbital elements for (1072) Malva : Mean anomaly = 187.04776485 deg Arg. of pericenter = 26.59956361 deg Long. of node = 37.12265151 deg Inclination = 8.03015377 deg Eccentricity = 0.24327312 Semimajor axis = 3.15921298 AU Perihelion dist = 2.39066139 AU Mag: H = 10.76, G = 0.15 Epoch of elements : MJD 54989.35500000 TDT (2009 Jun 07.355) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 7 1072 Malva 8h 30.5m UT 9.4 16 7 13.818-26 33 3.43TYC 6788-00413-1 10.6 16.1 45 2.8 2.928 -1.987 3.25 -141.6958 -26.551 52.09 22.78 8.5085 0.09910 0.81619 -8.88101 1.08166 0.00125 0.00031 2000 185.4057412009 529.00000 26.599564 37.122652 8.0301540.24327312 3.1592130 2.390661410.5 5.00.15 RATE 1.7552370 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.028 103 2.36 0.029 0 54581.5020090607_0413-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org