IOTA/IOTA-ES occultation update for (49591) 1999 DO2 / TYC 7972-00771-1 event on 2024 Jul 28, 23:41 UT Visible from Summary ------- On 2024 Jul 28 UT, the 17.5140016447546 km diameter asteroid (49591) 1999 DO2 will occult a 10.7 mag star in the constellation Microscopium for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.26 mag to 17.91 mag (the magnitude of the asteroid) for at most 1.230 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 97 * date and approx. time of event: 2024 Jul 28, 23:35 - 2024 Jul 28, 23:46 * geocentric midpoint of event [JD]: 2460520.48705204 * magnitude of target star: 10.65 * magnitude drop [mag]: 7.26 * estimated maximum duration [s]: 1.230 * Moon: 40 % sunlit, 104° distance * Sun: 156° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 24 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.003", 76°) * approx speed of asteroid's shadow [km/s]: 14.4058 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7972-00771-1 by 49591 1999 DO2 on 2024 Jul 28 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 63 0 0 16 32 39 23 46 46.7 1 135 -15 16 41 55 16 23 24 16 49 19 16 16 4 .... - 62 0 0 15 37 2 23 46 46.4 2 135 -16 15 46 10 15 27 57 15 53 26 15 20 44 -0.55 - 61 0 0 14 43 5 23 46 45.7 4 136 -17 14 52 4 14 34 8 14 59 13 14 27 3 -0.70 - 60 0 0 13 50 46 23 46 44.7 5 136 -18 13 59 36 13 41 58 14 6 39 13 34 59 -0.77 - 59 0 0 13 0 3 23 46 43.4 6 136 -20 13 8 45 12 51 22 13 15 41 12 44 30 -0.81 - 58 0 0 12 10 54 23 46 41.9 7 136 -21 12 19 28 12 2 21 12 26 18 11 55 34 -0.84 - 57 0 0 11 23 18 23 46 40.1 9 137 -22 11 31 45 11 14 52 11 38 29 11 8 11 -0.85 - 56 0 0 10 37 13 23 46 38.0 10 137 -23 10 45 34 10 28 54 10 52 12 10 22 19 -0.87 - 55 0 0 9 52 38 23 46 35.7 11 137 -24 10 0 52 9 44 26 10 7 25 9 37 56 -0.88 - 54 0 0 9 9 31 23 46 33.1 12 137 -26 9 17 39 9 1 25 9 24 7 8 55 0 -0.88 - 53 0 0 8 27 51 23 46 30.3 13 137 -27 8 35 53 8 19 51 8 42 17 8 13 30 -0.89 - 52 0 0 7 47 37 23 46 27.3 15 138 -28 7 55 32 7 39 42 8 1 51 7 33 26 -0.89 - 51 0 0 7 8 45 23 46 24.1 16 138 -29 7 16 36 7 0 56 7 22 51 6 54 44 -0.90 - 50 0 0 6 31 17 23 46 20.7 17 138 -30 6 39 2 6 23 33 6 45 12 6 17 24 -0.90 - 49 0 0 5 55 9 23 46 17.2 18 138 -31 6 2 49 5 47 30 6 8 56 5 41 25 -0.90 - 48 0 0 5 20 20 23 46 13.4 19 138 -32 5 27 56 5 12 46 5 33 59 5 6 45 -0.91 - 47 0 0 4 46 50 23 46 9.4 20 139 -34 4 54 22 4 39 20 5 0 21 4 33 23 -0.91 - 46 0 0 4 14 37 23 46 5.3 21 139 -35 4 22 4 4 7 12 4 28 0 4 1 18 -0.91 - 45 0 0 3 43 40 23 46 1.0 22 139 -36 3 51 3 3 36 18 3 56 56 3 30 28 -0.91 - 44 0 0 3 13 58 23 45 56.6 23 139 -37 3 21 17 3 6 40 3 27 7 3 0 52 -0.91 - 43 0 0 2 45 29 23 45 52.0 24 140 -38 2 52 44 2 38 14 2 58 31 2 32 30 -0.91 - 42 0 0 2 18 12 23 45 47.3 25 140 -39 2 25 24 2 11 1 2 31 8 2 5 19 -0.91 - 41 0 0 1 52 7 23 45 42.5 26 140 -40 1 59 16 1 44 59 2 4 57 1 39 20 -0.91 - 40 0 0 1 27 12 23 45 37.5 27 140 -41 1 34 18 1 20 7 1 39 57 1 14 30 -0.91 - 39 0 0 1 3 26 23 45 32.4 28 141 -42 1 10 29 0 56 25 1 16 6 0 50 50 -0.92 - 38 0 0 0 40 49 23 45 27.1 29 141 -43 0 47 49 0 33 50 0 53 24 0 28 18 -0.92 - 37 0 0 0 19 20 23 45 21.8 30 141 -44 0 26 17 0 12 23 0 31 49 0 6 53 -0.92 - 36 0 0 - 0 1 3 23 45 16.3 31 142 -45 0 5 52 - 0 7 57 0 11 22 - 0 13 26 -0.92 - 35 0 0 - 0 20 20 23 45 10.8 31 142 -46 - 0 13 28 - 0 27 12 - 0 7 59 - 0 32 38 -0.92 - 34 0 0 - 0 38 32 23 45 5.1 32 142 -47 - 0 31 42 - 0 45 21 - 0 26 15 - 0 50 46 -0.92 - 33 0 0 - 0 55 39 23 44 59.3 33 143 -48 - 0 48 51 - 1 2 27 - 0 43 26 - 1 7 50 -0.92 - 32 0 0 - 1 11 43 23 44 53.5 34 143 -49 - 1 4 57 - 1 18 29 - 0 59 33 - 1 23 50 -0.92 - 31 0 0 - 1 26 44 23 44 47.5 35 143 -50 - 1 19 59 - 1 33 28 - 1 14 37 - 1 38 48 -0.92 - 30 0 0 - 1 40 42 23 44 41.4 35 144 -51 - 1 33 59 - 1 47 24 - 1 28 38 - 1 52 43 -0.92 - 29 0 0 - 1 53 38 23 44 35.3 36 144 -52 - 1 46 57 - 2 0 19 - 1 41 37 - 2 5 37 -0.92 - 28 0 0 - 2 5 33 23 44 29.1 37 145 -53 - 1 58 53 - 2 12 12 - 1 53 35 - 2 17 29 -0.92 - 27 0 0 - 2 16 27 23 44 22.8 38 145 -54 - 2 9 48 - 2 23 5 - 2 4 31 - 2 28 21 -0.92 - 26 0 0 - 2 26 20 23 44 16.4 38 146 -55 - 2 19 43 - 2 32 57 - 2 14 27 - 2 38 12 -0.92 - 25 0 0 - 2 35 14 23 44 10.0 39 146 -56 - 2 28 38 - 2 41 50 - 2 23 22 - 2 47 4 -0.92 - 24 0 0 - 2 43 8 23 44 3.4 40 147 -57 - 2 36 32 - 2 49 42 - 2 31 17 - 2 54 56 -0.92 - 23 0 0 - 2 50 2 23 43 56.8 40 147 -58 - 2 43 28 - 2 56 36 - 2 38 13 - 3 1 49 -0.92 - 22 0 0 - 2 55 58 23 43 50.2 41 148 -59 - 2 49 24 - 3 2 31 - 2 44 10 - 3 7 43 -0.92 - 21 0 0 - 3 0 54 23 43 43.4 41 149 -60 - 2 54 21 - 3 7 27 - 2 49 8 - 3 12 39 -0.92 - 20 0 0 - 3 4 52 23 43 36.6 42 149 -60 - 2 58 20 - 3 11 25 - 2 53 7 - 3 16 36 -0.92 - 19 0 0 - 3 7 52 23 43 29.8 43 150 -61 - 3 1 20 - 3 14 24 - 2 56 7 - 3 19 35 -0.92 - 18 0 0 - 3 9 54 23 43 22.9 43 151 -62 - 3 3 22 - 3 16 25 - 2 58 9 - 3 21 36 -0.92 - 17 0 0 - 3 10 57 23 43 15.9 44 152 -63 - 3 4 25 - 3 17 29 - 2 59 13 - 3 22 39 -0.92 - 16 0 0 - 3 11 3 23 43 8.8 44 152 -64 - 3 4 31 - 3 17 34 - 2 59 19 - 3 22 45 -0.92 - 15 0 0 - 3 10 10 23 43 1.7 44 153 -64 - 3 3 38 - 3 16 42 - 2 58 26 - 3 21 52 -0.92 - 14 0 0 - 3 8 20 23 42 54.6 45 154 -65 - 3 1 48 - 3 14 51 - 2 56 36 - 3 20 2 -0.92 - 13 0 0 - 3 5 32 23 42 47.4 45 155 -66 - 2 58 59 - 3 12 3 - 2 53 47 - 3 17 14 -0.92 - 12 0 0 - 3 1 45 23 42 40.1 46 156 -66 - 2 55 12 - 3 8 17 - 2 50 0 - 3 13 28 -0.92 - 11 0 0 - 2 57 0 23 42 32.8 46 157 -67 - 2 50 27 - 3 3 33 - 2 45 14 - 3 8 45 -0.92 - 10 0 0 - 2 51 18 23 42 25.5 46 157 -68 - 2 44 44 - 2 57 51 - 2 39 30 - 3 3 3 -0.92 - 9 0 0 - 2 44 36 23 42 18.1 46 158 -68 - 2 38 2 - 2 51 10 - 2 32 48 - 2 56 23 -0.92 - 8 0 0 - 2 36 56 23 42 10.6 47 159 -69 - 2 30 21 - 2 43 31 - 2 25 6 - 2 48 44 -0.92 - 7 0 0 - 2 28 18 23 42 3.2 47 160 -69 - 2 21 41 - 2 34 53 - 2 16 26 - 2 40 7 -0.92 - 6 0 0 - 2 18 40 23 41 55.6 47 161 -70 - 2 12 2 - 2 25 16 - 2 6 46 - 2 30 31 -0.92 - 5 0 0 - 2 8 2 23 41 48.1 47 162 -70 - 2 1 24 - 2 14 40 - 1 56 7 - 2 19 56 -0.92 - 4 0 0 - 1 56 25 23 41 40.5 47 163 -70 - 1 49 45 - 2 3 4 - 1 44 27 - 2 8 21 -0.92 - 3 0 0 - 1 43 48 23 41 32.8 47 164 -71 - 1 37 7 - 1 50 28 - 1 31 47 - 1 55 46 -0.92 - 2 0 0 - 1 30 10 23 41 25.1 47 165 -71 - 1 23 27 - 1 36 52 - 1 18 7 - 1 42 11 -0.92 - 1 0 0 - 1 15 31 23 41 17.4 47 166 -71 - 1 8 47 - 1 22 15 - 1 3 25 - 1 27 35 -0.92 0 0 0 - 0 59 51 23 41 9.7 47 168 -71 - 0 53 5 - 1 6 36 - 0 47 41 - 1 11 58 -0.92 1 0 0 - 0 43 8 23 41 1.9 47 169 -71 - 0 36 20 - 0 49 55 - 0 30 56 - 0 55 19 -0.92 2 0 0 - 0 25 23 23 40 54.1 47 170 -71 - 0 18 34 - 0 32 13 - 0 13 7 - 0 37 37 -0.92 3 0 0 - 0 6 35 23 40 46.3 47 171 -71 0 0 17 - 0 13 27 0 5 45 - 0 18 53 -0.92 4 0 0 0 13 17 23 40 38.5 47 172 -71 0 20 11 0 6 23 0 25 41 0 0 55 -0.92 5 0 0 0 34 13 23 40 30.6 47 173 -71 0 41 10 0 27 17 0 46 41 0 21 47 -0.92 6 0 0 0 56 14 23 40 22.8 46 174 -70 1 3 14 0 49 16 1 8 47 0 43 44 -0.92 7 0 0 1 19 22 23 40 14.9 46 175 -70 1 26 23 1 12 20 1 32 0 1 6 46 -0.93 8 0 0 1 43 35 23 40 7.0 46 176 -70 1 50 40 1 36 32 1 56 19 1 30 55 -0.93 9 0 0 2 8 57 23 39 59.1 45 177 -69 2 16 5 2 1 50 2 21 45 1 56 11 -0.93 10 0 0 2 35 26 23 39 51.2 45 178 -68 2 42 37 2 28 16 2 48 21 2 22 35 -0.93 11 0 0 3 3 5 23 39 43.3 45 179 -68 3 10 19 2 55 52 3 16 5 2 50 8 -0.93 12 0 0 3 31 54 23 39 35.4 44 180 -67 3 39 11 3 24 37 3 45 0 3 18 50 -0.93 13 0 0 4 1 53 23 39 27.5 44 181 -66 4 9 15 3 54 33 4 15 7 3 48 43 -0.93 14 0 0 4 33 5 23 39 19.6 43 182 -66 4 40 30 4 25 41 4 46 25 4 19 48 -0.93 15 0 0 5 5 29 23 39 11.7 42 183 -65 5 12 59 4 58 1 5 18 57 4 52 5 -0.93 16 0 0 5 39 8 23 39 3.9 42 184 -64 5 46 42 5 31 35 5 52 43 5 25 36 -0.93 17 0 0 6 14 2 23 38 56.1 41 185 -63 6 21 40 6 6 24 6 27 45 6 0 22 -0.93 18 0 0 6 50 11 23 38 48.3 40 186 -62 6 57 54 6 42 30 7 4 3 6 36 23 -0.94 19 0 0 7 27 38 23 38 40.6 40 187 -61 7 35 26 7 19 52 7 41 39 7 13 41 -0.94 20 0 0 8 6 24 23 38 32.9 39 188 -60 8 14 17 7 58 32 8 20 33 7 52 18 -0.94 21 0 0 8 46 29 23 38 25.2 38 188 -59 8 54 27 8 38 31 9 0 48 8 32 13 -0.94 22 0 0 9 27 54 23 38 17.7 37 189 -58 9 35 58 9 19 52 9 42 24 9 13 29 -0.94 23 0 0 10 10 42 23 38 10.1 37 190 -57 10 18 52 10 2 33 10 25 23 9 56 6 -0.94 24 0 0 10 54 53 23 38 2.7 36 191 -56 11 3 9 10 46 38 11 9 45 10 40 6 -0.94 25 0 0 11 40 29 23 37 55.4 35 191 -55 11 48 52 11 32 8 11 55 32 11 25 30 -0.94 26 0 0 12 27 30 23 37 48.1 34 192 -54 12 36 0 12 19 2 12 42 46 12 12 19 -0.95 27 0 0 13 15 59 23 37 41.0 33 193 -53 13 24 36 13 7 24 13 31 28 13 0 35 -0.95 28 0 0 14 5 56 23 37 33.9 32 194 -51 14 14 41 13 57 14 14 21 39 13 50 19 -0.95 29 0 0 14 57 24 23 37 27.0 31 194 -50 15 6 16 14 48 33 15 13 20 14 41 32 -0.95 30 0 0 15 50 22 23 37 20.3 30 195 -49 15 59 22 15 41 23 16 6 34 15 34 16 -0.95 31 0 0 16 44 53 23 37 13.7 29 196 -48 16 54 2 16 35 45 17 1 20 16 28 31 -0.95 32 0 0 17 40 57 23 37 7.2 27 196 -46 17 50 16 17 31 40 17 57 41 17 24 19 -0.96 33 0 0 18 38 37 23 37 0.9 26 197 -45 18 48 5 18 29 10 18 55 38 18 21 42 -0.96 34 0 0 19 37 52 23 36 54.8 25 197 -44 19 47 31 19 28 16 19 55 12 19 20 40 -0.96 35 0 0 20 38 46 23 36 48.9 24 198 -42 20 48 35 20 28 59 20 56 25 20 21 14 -0.96 36 0 0 21 41 18 23 36 43.3 22 199 -41 21 51 18 21 31 20 21 59 17 21 23 27 -0.96 37 0 0 22 45 30 23 36 37.8 21 199 -40 22 55 42 22 35 20 23 3 51 22 27 18 -0.97 38 0 0 23 51 23 23 36 32.7 20 200 -38 24 1 48 23 41 1 24 10 6 23 32 49 -0.97 39 0 0 24 58 58 23 36 27.7 18 200 -37 25 9 36 24 48 23 25 18 5 24 40 0 -0.97 40 0 0 26 8 15 23 36 23.1 17 201 -35 26 19 7 25 57 26 26 27 48 25 48 53 -0.97 41 0 0 27 19 16 23 36 18.8 16 201 -34 27 30 23 27 8 13 27 39 16 26 59 28 -0.98 42 0 0 28 32 2 23 36 14.8 14 202 -32 28 43 24 28 20 43 28 52 29 28 11 46 -0.98 43 0 0 29 46 32 23 36 11.1 13 202 -31 29 58 11 29 34 57 30 7 29 29 25 47 -0.99 44 0 0 31 2 47 23 36 7.8 11 203 -29 31 14 43 30 50 54 31 24 16 30 41 31 -0.99 45 0 0 32 20 46 23 36 4.9 10 204 -28 32 33 1 32 8 36 32 42 49 31 58 58 -1.00 46 0 0 33 40 30 23 36 2.4 8 204 -26 33 53 5 33 28 1 34 3 9 33 18 8 -1.01 47 0 0 35 1 58 23 36 0.3 7 205 -25 35 14 54 34 49 8 35 25 14 34 38 59 -1.03 48 0 0 36 25 10 23 35 58.6 5 205 -23 36 38 28 36 11 58 36 49 7 36 1 32 -1.05 49 0 0 37 50 4 23 35 57.4 3 206 -22 38 3 46 37 36 29 38 14 44 37 25 45 -1.10 50 0 0 39 16 40 23 35 56.7 2 207 -20 39 30 47 39 2 40 39 42 6 38 51 37 -1.23 51 0 0 40 44 53 23 35 56.5 0 207 -18 .. .. .. 40 30 27 .. .. .. 40 19 3 -5.63 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 7972-00771-1 * constellation : Microscopium * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 53 45.8393 DE: -42 30 38.868 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 53 45.8393 DE: -42 30 38.869 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (49591) 1999 DO2 asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.60590 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 date of fit: 2023 Apr 25 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.029", 0.003", 76.033° remarks: * orbital elements for (49591)1999 DO2 : Mean anomaly = 173.2092529708 deg Arg. of pericenter = 84.2552537117 deg Long. of node = 46.2090853984 deg Inclination = 17.7024166299 deg Eccentricity = 0.1064271489 Semimajor axis = 3.2164407996 AU Perihelion dist = 2.8741241757 AU Mag: H = 12.57, G = 0.15 Epoch of elements : MJD 60519.98705213 TDT (2024 Jul 28.9871) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr25,1.23,2024,7,28,23.689249,-0.223029,0.639632,-7.677675,-2.677145,-0.000514,0.002274,0.000001,0.000000 11.3906,-42.4167,-173.71,18.68,False TYC 7972-00771-1,20.89606646,-42.5107966,11.17,10.65,10.37,0.1,0,,20.92364299,-42.4167018,7.26,7.09,0,0,0 49591,1999 DO2,17.91,17.703,2.6059,0,0,-2.339,-9.03,,1.8,0 0,173.0406,2024,7,28,84.2553,46.2091,17.7024,0.10643,3.21644,2.87412,12.57,5.0,0.15 1.397,0.0293,0.0025,76,0.0037,Known errors,0.96,0,-1,-1 20240728_0771-1,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org