IOTA/IOTA-ES occultation update for (22) Kalliope / UCAC4 297-122392 event on 2024 Jun 24, 22:24 UT Visible from Summary ------- On 2024 Jun 24 UT, the 176.587848291897 km diameter asteroid (22) Kalliope will occult a 11.3 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 0.70 mag to 11.19 mag (the magnitude of the asteroid) for at most 12.830 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: 99 * date and approx. time of event: 2024 Jun 24, 22:20 - 2024 Jun 24, 22:28 * geocentric midpoint of event [JD]: 2460486.43365683 * magnitude of target star: 11.30 * magnitude drop [mag]: 0.70 * estimated maximum duration [s]: 12.830 * Moon: 89 % sunlit, 47° distance * Sun: 168° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 339 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.015) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.014", 106°) * approx speed of asteroid's shadow [km/s]: 13.7803 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 297-122392 by 22 Kalliope #1 on 2024 Jun 24 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 - 48 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 38 47 41 .. .. .. 38 11 6 .... - 47 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 38 7 28 .. .. .. 37 31 26 .... - 46 0 0 39 27 49 22 28 28.2 1 132 0 .. .. .. 37 28 19 .. .. .. 36 52 48 .... - 45 0 0 38 47 55 22 28 27.8 2 133 -1 40 55 3 36 50 14 41 36 59 36 15 12 -1.06 - 44 0 0 38 9 10 22 28 27.2 3 134 -2 40 14 10 36 13 12 40 55 18 35 38 38 -1.27 - 43 0 0 37 31 34 22 28 26.3 4 134 -3 39 34 31 35 37 13 40 14 56 35 3 6 -1.38 - 42 0 0 36 55 5 22 28 25.1 5 135 -4 38 56 8 35 2 18 39 35 50 34 28 36 -1.44 - 41 0 0 36 19 44 22 28 23.6 6 135 -5 38 18 59 34 28 24 38 58 2 33 55 7 -1.48 - 40 0 0 35 45 30 22 28 22.0 7 136 -6 37 43 2 33 55 33 38 21 28 33 22 39 -1.51 - 39 0 0 35 12 21 22 28 20.0 8 137 -7 37 8 16 33 23 44 37 46 8 32 51 12 -1.53 - 38 0 0 34 40 18 22 28 17.9 9 137 -8 36 34 42 32 52 57 37 12 1 32 20 46 -1.55 - 37 0 0 34 9 20 22 28 15.5 10 138 -9 36 2 18 32 23 11 36 39 5 31 51 19 -1.56 - 36 0 0 33 39 27 22 28 12.9 11 138 -10 35 31 2 31 54 25 36 7 21 31 22 53 -1.57 - 35 0 0 33 10 37 22 28 10.0 12 139 -11 35 0 56 31 26 40 35 36 47 30 55 26 -1.58 - 34 0 0 32 42 51 22 28 7.0 12 140 -12 34 31 57 30 59 55 35 7 22 30 28 58 -1.59 - 33 0 0 32 16 8 22 28 3.7 13 140 -12 34 4 4 30 34 10 34 39 5 30 3 29 -1.59 - 32 0 0 31 50 27 22 28 0.3 14 141 -13 33 37 18 30 9 25 34 11 56 29 38 59 -1.60 - 31 0 0 31 25 48 22 27 56.6 15 141 -14 33 11 38 29 45 38 33 45 54 29 15 27 -1.60 - 30 0 0 31 2 11 22 27 52.8 16 142 -15 32 47 2 29 22 50 33 20 58 28 52 53 -1.61 - 29 0 0 30 39 35 22 27 48.8 17 143 -16 32 23 31 29 1 0 32 57 8 28 31 17 -1.61 - 28 0 0 30 17 59 22 27 44.6 17 143 -17 32 1 3 28 40 9 32 34 23 28 10 37 -1.61 - 27 0 0 29 57 23 22 27 40.3 18 144 -18 31 39 39 28 20 15 32 12 41 27 50 55 -1.61 - 26 0 0 29 37 47 22 27 35.8 19 145 -19 31 19 18 28 1 18 31 52 4 27 32 10 -1.62 - 25 0 0 29 19 11 22 27 31.1 20 145 -20 30 59 58 27 43 18 31 32 29 27 14 21 -1.62 - 24 0 0 29 1 33 22 27 26.3 20 146 -20 30 41 40 27 26 16 31 13 58 26 57 28 -1.62 - 23 0 0 28 44 54 22 27 21.3 21 147 -21 30 24 24 27 10 9 30 56 28 26 41 31 -1.62 - 22 0 0 28 29 14 22 27 16.2 22 147 -22 30 8 8 26 54 59 30 40 0 26 26 29 -1.62 - 21 0 0 28 14 31 22 27 11.0 23 148 -23 29 52 52 26 40 45 30 24 33 26 12 23 -1.62 - 20 0 0 28 0 46 22 27 5.6 23 149 -24 29 38 37 26 27 26 30 10 7 25 59 12 -1.62 - 19 0 0 27 47 58 22 27 0.1 24 150 -24 29 25 21 26 15 3 29 56 42 25 46 56 -1.62 - 18 0 0 27 36 8 22 26 54.5 24 150 -25 29 13 4 26 3 35 29 44 16 25 35 34 -1.63 - 17 0 0 27 25 14 22 26 48.7 25 151 -26 29 1 47 25 53 2 29 32 51 25 25 7 -1.63 - 16 0 0 27 15 17 22 26 42.9 26 152 -26 28 51 28 25 43 24 29 22 25 25 15 34 -1.63 - 15 0 0 27 6 16 22 26 36.9 26 153 -27 28 42 8 25 34 40 29 12 58 25 6 55 -1.63 - 14 0 0 26 58 12 22 26 30.9 27 153 -28 28 33 46 25 26 51 29 4 29 24 59 10 -1.63 - 13 0 0 26 51 3 22 26 24.7 27 154 -28 28 26 22 25 19 55 28 57 0 24 52 19 -1.63 - 12 0 0 26 44 50 22 26 18.5 28 155 -29 28 19 56 25 13 54 28 50 29 24 46 22 -1.63 - 11 0 0 26 39 33 22 26 12.2 28 156 -30 28 14 27 25 8 47 28 44 56 24 41 17 -1.63 - 10 0 0 26 35 11 22 26 5.8 28 157 -30 28 9 56 25 4 34 28 40 22 24 37 7 -1.63 - 9 0 0 26 31 45 22 25 59.3 29 158 -31 28 6 22 25 1 15 28 36 45 24 33 49 -1.63 - 8 0 0 26 29 14 22 25 52.7 29 158 -31 28 3 45 24 58 49 28 34 6 24 31 25 -1.63 - 7 0 0 26 27 39 22 25 46.1 30 159 -32 28 2 5 24 57 17 28 32 25 24 29 54 -1.63 - 6 0 0 26 26 58 22 25 39.4 30 160 -32 28 1 22 24 56 38 28 31 42 24 29 16 -1.63 - 5 0 0 26 27 13 22 25 32.7 30 161 -33 28 1 37 24 56 53 28 31 56 24 29 30 -1.63 - 4 0 0 26 28 22 22 25 25.9 30 162 -33 28 2 47 24 58 1 28 33 7 24 30 38 -1.63 - 3 0 0 26 30 26 22 25 19.0 31 163 -34 28 4 55 25 0 2 28 35 16 24 32 39 -1.63 - 2 0 0 26 33 26 22 25 12.1 31 164 -34 28 8 0 25 2 57 28 38 23 24 35 32 -1.63 - 1 0 0 26 37 20 22 25 5.2 31 165 -34 28 12 2 25 6 45 28 42 27 24 39 18 -1.64 0 0 0 26 42 10 22 24 58.2 31 166 -35 28 17 1 25 11 27 28 47 29 24 43 58 -1.64 1 0 0 26 47 55 22 24 51.2 31 167 -35 28 22 56 25 17 2 28 53 29 24 49 30 -1.64 2 0 0 26 54 34 22 24 44.2 31 168 -35 28 29 49 25 23 30 29 0 26 24 55 55 -1.64 3 0 0 27 2 9 22 24 37.1 31 169 -36 28 37 39 25 30 52 29 8 20 25 3 13 -1.64 4 0 0 27 10 39 22 24 30.0 31 170 -36 28 46 26 25 39 8 29 17 13 25 11 24 -1.64 5 0 0 27 20 5 22 24 23.0 31 171 -36 28 56 10 25 48 17 29 27 5 25 20 29 -1.64 6 0 0 27 30 26 22 24 15.9 31 172 -36 29 6 53 25 58 20 29 37 54 25 30 27 -1.64 7 0 0 27 41 44 22 24 8.8 31 173 -36 29 18 33 26 9 17 29 49 42 25 41 18 -1.64 8 0 0 27 53 56 22 24 1.7 31 174 -36 29 31 11 26 21 8 30 2 29 25 53 3 -1.64 9 0 0 28 7 6 22 23 54.6 31 175 -36 29 44 47 26 33 54 30 16 14 26 5 42 -1.65 10 0 0 28 21 11 22 23 47.5 31 176 -36 29 59 22 26 47 34 30 30 59 26 19 14 -1.65 11 0 0 28 36 13 22 23 40.4 31 177 -36 30 14 55 27 2 8 30 46 44 26 33 41 -1.65 12 0 0 28 52 11 22 23 33.4 30 178 -36 30 31 28 27 17 37 31 3 28 26 49 1 -1.65 13 0 0 29 9 6 22 23 26.4 30 178 -36 30 49 0 27 34 1 31 21 13 27 5 16 -1.65 14 0 0 29 26 59 22 23 19.4 30 179 -36 31 7 32 27 51 20 31 39 58 27 22 26 -1.65 15 0 0 29 45 49 22 23 12.5 30 180 -36 31 27 4 28 9 34 31 59 45 27 40 30 -1.65 16 0 0 30 5 37 22 23 5.6 29 181 -36 31 47 36 28 28 44 32 20 33 27 59 29 -1.65 17 0 0 30 26 23 22 22 58.7 29 182 -36 32 9 10 28 48 49 32 42 23 28 19 23 -1.66 18 0 0 30 48 8 22 22 51.9 28 183 -36 32 31 44 29 9 51 33 5 15 28 40 12 -1.66 19 0 0 31 10 51 22 22 45.2 28 184 -35 32 55 21 29 31 49 33 29 10 29 1 57 -1.66 20 0 0 31 34 33 22 22 38.5 28 185 -35 33 19 59 29 54 43 33 54 8 29 24 38 -1.66 21 0 0 31 59 14 22 22 32.0 27 186 -35 33 45 41 30 18 34 34 20 11 29 48 15 -1.66 22 0 0 32 24 56 22 22 25.5 27 187 -34 34 12 26 30 43 22 34 47 18 30 12 48 -1.66 23 0 0 32 51 38 22 22 19.1 26 188 -34 34 40 15 31 9 7 35 15 30 30 38 17 -1.67 24 0 0 33 19 20 22 22 12.7 25 189 -33 35 9 7 31 35 50 35 44 47 31 4 44 -1.67 25 0 0 33 48 4 22 22 6.5 25 190 -33 35 39 4 32 3 31 36 15 11 31 32 7 -1.67 26 0 0 34 17 48 22 22 0.4 24 190 -32 36 10 8 32 32 10 36 46 42 32 0 28 -1.67 27 0 0 34 48 35 22 21 54.4 24 191 -32 36 42 17 33 1 47 37 19 22 32 29 46 -1.67 28 0 0 35 20 23 22 21 48.6 23 192 -31 37 15 34 33 32 23 37 53 11 33 0 1 -1.68 29 0 0 35 53 14 22 21 42.8 22 193 -31 37 49 59 34 3 58 38 28 9 33 31 15 -1.68 30 0 0 36 27 8 22 21 37.2 21 194 -30 38 25 32 34 36 32 39 4 18 34 3 26 -1.68 31 0 0 37 2 6 22 21 31.8 21 195 -29 39 2 15 35 10 5 39 41 39 34 36 36 -1.68 32 0 0 37 38 8 22 21 26.5 20 196 -29 39 40 8 35 44 37 40 20 12 35 10 44 -1.69 33 0 0 38 15 15 22 21 21.4 19 196 -28 40 19 13 36 20 10 41 0 0 35 45 51 -1.69 34 0 0 38 53 28 22 21 16.5 18 197 -27 40 59 30 36 56 43 41 41 3 36 21 57 -1.69 35 0 0 39 32 46 22 21 11.7 17 198 -27 41 41 0 37 34 17 42 23 22 36 59 3 -1.70 36 0 0 40 13 11 22 21 7.1 17 199 -26 42 23 46 38 12 51 43 7 0 37 37 7 -1.70 37 0 0 40 54 42 22 21 2.8 16 199 -25 43 7 47 38 52 27 43 51 57 38 16 11 -1.70 38 0 0 41 37 22 22 20 58.6 15 200 -24 43 53 5 39 33 3 44 38 14 38 56 15 -1.70 39 0 0 42 21 9 22 20 54.7 14 201 -23 44 39 41 40 14 41 45 25 55 39 37 18 -1.71 40 0 0 43 6 5 22 20 51.0 13 202 -22 45 27 37 40 57 20 46 15 1 40 19 21 -1.71 41 0 0 43 52 9 22 20 47.5 12 203 -21 46 16 56 41 41 1 47 5 34 41 2 23 -1.72 42 0 0 44 39 25 22 20 44.3 11 203 -20 47 7 38 42 25 43 47 57 38 41 46 25 -1.72 43 0 0 45 27 51 22 20 41.4 10 204 -19 47 59 46 43 11 26 48 51 14 42 31 27 -1.73 44 0 0 46 17 28 22 20 38.7 9 205 -18 48 53 22 43 58 13 49 46 27 43 17 28 -1.74 45 0 0 47 8 18 22 20 36.3 8 206 -17 49 48 30 44 46 0 50 43 20 44 4 29 -1.75 46 0 0 48 0 20 22 20 34.2 7 206 -16 50 45 11 45 34 48 51 41 57 44 52 28 -1.76 47 0 0 48 53 36 22 20 32.4 6 207 -15 51 43 31 46 24 38 52 42 25 45 41 25 -1.78 48 0 0 49 48 7 22 20 30.9 5 208 -14 52 43 31 47 15 29 53 44 49 46 31 21 -1.81 49 0 0 50 43 54 22 20 29.7 3 209 -13 53 45 19 48 7 21 .. .. .. 47 22 15 -1.85 50 0 0 51 40 57 22 20 28.9 2 209 -12 .. .. .. 49 0 13 .. .. .. 48 14 6 -1.94 51 0 0 52 39 18 22 20 28.4 1 210 -11 .. .. .. 49 54 5 .. .. .. 49 6 53 -2.22 52 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 50 48 57 .. .. .. 50 0 36 .... 53 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 51 44 47 .. .. .. 50 55 14 .... 54 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 52 41 36 .. .. .. 51 50 45 .... Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 297-122392 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 34 06.5312 DE: -30 44 44.896 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 34 06.5312 DE: -30 44 44.896 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 12.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (22) Kalliope asteroid class: asteroid system: multiple bodies approx. diameter [km]: 177 approx. diameter ["]: 0.112 distance from Earth [AU]: 2.16680 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 date of fit: 2023 Apr 24 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): 0.027", 0.014", 106.2° remarks: * orbital elements for (22)Kalliope : Mean anomaly = 208.9096096190 deg Arg. of pericenter = 357.9459222625 deg Long. of node = 65.9745754812 deg Inclination = 13.7019604343 deg Eccentricity = 0.0988462841 Semimajor axis = 2.9108818301 AU Perihelion dist = 2.6231519779 AU Mag: H = 6.65, G = 0.21 Epoch of elements : MJD 60485.93365688 TDT (2024 Jun 24.9337) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182023Apr24 Binary solution 1 : Kepler,12.83,2024,6,24,22.407764,-0.153834,0.839028,-7.650497,-1.402626,0.000900,0.000682,0.000001,0.000000 14.2499,-30.7633,-155.45,23.38,False UCAC4 297-122392,17.56848089,-30.7458044,12.31,11.30,10.75,0.1,0,,17.59512058,-30.7633205,0.70,0.74,0,0,0 22,Kalliope #1,11.19,176.745,2.1668,0,1,-2.408,-5.69,,10.0,0 Linus,28,1098.600,3.595606,,94.18,2457754.50,323.200,,284.30, 0,208.7243,2024,6,24,357.9459,65.9746,13.7020,0.09885,2.91088,2.62315,6.65,5.0,0.15 1.156,0.0273,0.0140,106,0.0175,Known errors + binary orbit,0.90,0,-1,-1 20240624_122392_Ma1,60139.40 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org