IOTA/IOTA-ES occultation update for (48) Doris / TYC 6270-00474-1 event on 2021 Feb 15, 06:24 UT Visible from Europe Summary ------- On 2021 Feb 15 UT, the 222 km diameter asteroid (48) Doris will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.92 mag to 13.42 mag (the magnitude of the asteroid) for at most 6.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, 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: 100 * date and approx. time of event: 2021 Feb 15, 06:23 - 2021 Feb 15, 06:26 * geocentric midpoint of event [JD]: 2459260.76708750 * magnitude of target star: 11.70 * magnitude drop [mag]: 1.92 * estimated maximum duration [s]: 6.3 * Moon: 13 % sunlit, 92° distance * Sun: 50° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 481 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 35.1402 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6270-00474-1 by 48 Doris on 2021 Feb 15 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 ' " Longitude Longitude Longitude Longitude .. .. .. 64 0 0 .. .. .... .. .. .. ... .. .. 81 15 1 ... .. .. 80 28 0 .... 86 16 8 63 0 0 6 25 59.1 0 228 15 ... .. .. 78 57 6 ... .. .. 78 10 51 .... 83 50 57 62 0 0 6 25 59.0 2 226 15 ... .. .. 76 38 49 ... .. .. 75 53 9 -0.88 Latitude Latitude Latitude Latitude 82 0 0 61 13 57 6 25 58.7 3 224 16 58 31 10 64 19 34 58 15 31 64 40 16 -1.43 81 0 0 60 49 2 6 25 58.4 3 223 17 58 7 2 63 53 28 57 51 27 64 14 1 -1.67 80 0 0 60 24 6 6 25 58.1 4 222 17 57 42 55 63 27 21 57 27 24 63 47 45 -1.71 79 0 0 59 59 12 6 25 57.8 5 221 17 57 18 50 63 1 15 57 3 23 63 21 29 -1.74 78 0 0 59 34 21 6 25 57.4 5 220 18 56 54 47 62 35 11 56 39 25 62 55 15 -1.77 77 0 0 59 9 33 6 25 57.0 6 220 18 56 30 49 62 9 10 56 15 30 62 29 5 -1.78 76 0 0 58 44 49 6 25 56.5 7 219 18 56 6 55 61 43 13 55 51 41 62 2 58 -1.80 75 0 0 58 20 10 6 25 55.9 7 218 19 55 43 7 61 17 22 55 27 57 61 36 57 -1.81 74 0 0 57 55 38 6 25 55.3 8 217 19 55 19 26 60 51 37 55 4 20 61 11 3 -1.82 73 0 0 57 31 14 6 25 54.6 9 216 19 54 55 52 60 25 59 54 40 51 60 45 16 -1.83 72 0 0 57 6 58 6 25 53.9 9 215 19 54 32 27 60 0 30 54 17 30 60 19 38 -1.84 71 0 0 56 42 51 6 25 53.1 10 214 20 54 9 10 59 35 11 53 54 18 59 54 10 -1.85 70 0 0 56 18 54 6 25 52.3 11 213 20 53 46 5 59 10 3 53 31 17 59 28 52 -1.85 69 0 0 55 55 9 6 25 51.4 11 213 20 53 23 10 58 45 7 53 8 26 59 3 47 -1.86 68 0 0 55 31 36 6 25 50.4 12 212 20 53 0 27 58 20 23 52 45 48 58 38 54 -1.86 67 0 0 55 8 16 6 25 49.4 12 211 20 52 37 57 57 55 54 52 23 22 58 14 16 -1.87 66 0 0 54 45 10 6 25 48.4 13 210 20 52 15 40 57 31 38 52 1 9 57 49 52 -1.87 65 0 0 54 22 18 6 25 47.3 14 209 21 51 53 37 57 7 39 51 39 11 57 25 44 -1.88 64 0 0 53 59 42 6 25 46.1 14 208 21 51 31 50 56 43 56 51 17 28 57 1 53 -1.88 63 0 0 53 37 23 6 25 44.9 15 207 21 51 10 18 56 20 31 50 56 0 56 38 19 -1.88 62 0 0 53 15 20 6 25 43.6 16 206 21 50 49 3 55 57 24 50 34 49 56 15 4 -1.89 61 0 0 52 53 36 6 25 42.3 16 205 21 50 28 5 55 34 35 50 13 56 55 52 8 -1.89 60 0 0 52 32 10 6 25 40.9 17 205 21 50 7 26 55 12 7 49 53 20 55 29 32 -1.89 59 0 0 52 11 3 6 25 39.5 17 204 21 49 47 4 54 49 59 49 33 3 55 7 17 -1.89 58 0 0 51 50 17 6 25 38.0 18 203 21 49 27 2 54 28 13 49 13 5 54 45 23 -1.90 57 0 0 51 29 51 6 25 36.5 18 202 21 49 7 21 54 6 48 48 53 27 54 23 51 -1.90 56 0 0 51 9 47 6 25 34.9 19 201 21 48 47 59 53 45 47 48 34 9 54 2 42 -1.90 55 0 0 50 50 5 6 25 33.3 19 200 21 48 28 59 53 25 8 48 15 13 53 41 57 -1.90 54 0 0 50 30 45 6 25 31.6 20 199 21 48 10 20 53 4 54 47 56 38 53 21 36 -1.91 53 0 0 50 11 48 6 25 29.9 20 198 21 47 52 4 52 45 4 47 38 25 53 1 39 -1.91 52 0 0 49 53 16 6 25 28.1 21 197 20 47 34 11 52 25 39 47 20 36 52 42 8 -1.91 51 0 0 49 35 7 6 25 26.3 21 196 20 47 16 41 52 6 40 47 3 9 52 23 3 -1.91 50 0 0 49 17 24 6 25 24.5 22 195 20 46 59 35 51 48 7 46 46 6 52 4 24 -1.91 49 0 0 49 0 5 6 25 22.6 22 194 20 46 42 53 51 30 1 46 29 28 51 46 12 -1.91 48 0 0 48 43 13 6 25 20.7 23 193 20 46 26 36 51 12 22 46 13 14 51 28 27 -1.92 47 0 0 48 26 47 6 25 18.8 23 192 19 46 10 45 50 55 10 45 57 26 51 11 11 -1.92 46 0 0 48 10 47 6 25 16.8 24 191 19 45 55 19 50 38 27 45 42 3 50 54 22 -1.92 45 0 0 47 55 15 6 25 14.8 24 190 19 45 40 19 50 22 13 45 27 6 50 38 3 -1.92 44 0 0 47 40 10 6 25 12.7 24 189 19 45 25 45 50 6 27 45 12 35 50 22 12 -1.92 43 0 0 47 25 33 6 25 10.7 25 188 18 45 11 39 49 51 11 44 58 31 50 6 51 -1.92 42 0 0 47 11 25 6 25 8.6 25 187 18 44 58 0 49 36 24 44 44 55 49 52 0 -1.92 41 0 0 46 57 45 6 25 6.4 25 186 18 44 44 48 49 22 8 44 31 46 49 37 39 -1.93 40 0 0 46 44 34 6 25 4.3 26 185 17 44 32 4 49 8 22 44 19 5 49 23 49 -1.93 39 0 0 46 31 52 6 25 2.1 26 184 17 44 19 49 48 55 7 44 6 51 49 10 30 -1.93 38 0 0 46 19 40 6 24 59.9 26 183 16 44 8 2 48 42 22 43 55 7 48 57 42 -1.93 37 0 0 46 7 57 6 24 57.7 26 182 16 43 56 44 48 30 9 43 43 51 48 45 25 -1.93 36 0 0 45 56 45 6 24 55.5 26 180 16 43 45 55 48 18 28 43 33 4 48 33 40 -1.93 35 0 0 45 46 3 6 24 53.2 27 179 15 43 35 35 48 7 18 43 22 46 48 22 27 -1.93 34 0 0 45 35 52 6 24 51.0 27 178 15 43 25 45 47 56 40 43 12 58 48 11 46 -1.93 33 0 0 45 26 12 6 24 48.7 27 177 14 43 16 24 47 46 35 43 3 39 48 1 38 -1.94 32 0 0 45 17 3 6 24 46.4 27 176 14 43 7 34 47 37 2 42 54 50 47 52 2 -1.94 31 0 0 45 8 25 6 24 44.1 27 175 13 42 59 13 47 28 1 42 46 31 47 42 59 -1.94 30 0 0 45 0 18 6 24 41.8 27 174 13 42 51 23 47 19 34 42 38 43 47 34 29 -1.94 29 0 0 44 52 43 6 24 39.5 27 173 12 42 44 4 47 11 39 42 31 25 47 26 32 -1.94 28 0 0 44 45 40 6 24 37.2 27 172 12 42 37 15 47 4 18 42 24 37 47 19 9 -1.94 27 0 0 44 39 9 6 24 34.9 27 171 11 42 30 57 46 57 30 42 18 20 47 12 19 -1.94 26 0 0 44 33 9 6 24 32.6 27 170 10 42 25 10 46 51 15 42 12 34 47 6 2 -1.94 25 0 0 44 27 42 6 24 30.3 27 169 10 42 19 54 46 45 34 42 7 19 47 0 19 -1.94 24 0 0 44 22 47 6 24 28.0 27 167 9 42 15 9 46 40 26 42 2 35 46 55 10 -1.94 23 0 0 44 18 24 6 24 25.7 27 166 9 42 10 55 46 35 53 41 58 22 46 50 35 -1.94 22 0 0 44 14 34 6 24 23.5 27 165 8 42 7 13 46 31 52 41 54 41 46 46 34 -1.94 21 0 0 44 11 16 6 24 21.2 27 164 7 42 4 2 46 28 26 41 51 30 46 43 6 -1.95 20 0 0 44 8 31 6 24 18.9 27 163 7 42 1 22 46 25 34 41 48 52 46 40 13 -1.95 19 0 0 44 6 19 6 24 16.7 26 162 6 41 59 14 46 23 15 41 46 44 46 37 54 -1.95 18 0 0 44 4 39 6 24 14.5 26 161 5 41 57 38 46 21 31 41 45 8 46 36 9 -1.95 17 0 0 44 3 31 6 24 12.3 26 160 5 41 56 33 46 20 20 41 44 3 46 34 58 -1.95 16 0 0 44 2 57 6 24 10.1 26 159 4 41 56 0 46 19 44 41 43 30 46 34 22 -1.95 15 0 0 44 2 55 6 24 7.9 25 158 3 41 55 58 46 19 42 41 43 28 46 34 19 -1.95 14 0 0 44 3 25 6 24 5.7 25 157 3 41 56 28 46 20 13 41 43 58 46 34 51 -1.95 13 0 0 44 4 28 6 24 3.6 25 156 2 41 57 29 46 21 19 41 45 0 46 35 57 -1.95 12 0 0 44 6 4 6 24 1.5 25 155 1 41 59 2 46 22 58 41 46 32 46 37 37 -1.95 11 0 0 44 8 13 6 23 59.4 24 154 1 42 1 7 46 25 12 41 48 36 46 39 51 -1.95 10 0 0 44 10 54 6 23 57.4 24 153 0 42 3 43 46 27 59 41 51 12 46 42 39 -1.95 9 0 0 44 14 7 6 23 55.4 23 152 -1 42 6 50 46 31 20 41 54 18 46 46 1 -1.95 8 0 0 44 17 53 6 23 53.4 23 151 -1 42 10 29 46 35 15 41 57 56 46 49 57 -1.95 7 0 0 44 22 11 6 23 51.4 23 150 -2 42 14 38 46 39 44 42 2 5 46 54 27 -1.95 6 0 0 44 27 1 6 23 49.5 22 149 -3 42 19 19 46 44 46 42 6 45 46 59 30 -1.95 5 0 0 44 32 24 6 23 47.6 22 148 -4 42 24 31 46 50 22 42 11 56 47 5 8 -1.95 4 0 0 44 38 18 6 23 45.8 21 147 -4 42 30 14 46 56 30 42 17 38 47 11 18 -1.96 3 0 0 44 44 44 6 23 44.0 21 146 -5 42 36 28 47 3 13 42 23 51 47 18 2 -1.96 2 0 0 44 51 42 6 23 42.2 20 145 -6 42 43 12 47 10 28 42 30 33 47 25 19 -1.96 1 0 0 44 59 12 6 23 40.5 20 145 -6 42 50 26 47 18 16 42 37 47 47 33 10 -1.96 0 0 0 45 7 13 6 23 38.8 19 144 -7 42 58 11 47 26 37 42 45 30 47 41 33 -1.96 - 1 0 0 45 15 45 6 23 37.2 19 143 -8 43 6 26 47 35 30 42 53 44 47 50 29 -1.96 - 2 0 0 45 24 48 6 23 35.6 18 142 -9 43 15 11 47 44 56 43 2 27 47 59 58 -1.96 - 3 0 0 45 34 22 6 23 34.1 18 141 -9 43 24 26 47 54 55 43 11 40 48 9 59 -1.96 - 4 0 0 45 44 26 6 23 32.6 17 140 -10 43 34 11 48 5 25 43 21 23 48 20 32 -1.96 - 5 0 0 45 55 1 6 23 31.1 16 139 -11 43 44 24 48 16 27 43 31 34 48 31 37 -1.96 - 6 0 0 46 6 6 6 23 29.7 16 138 -12 43 55 7 48 28 0 43 42 15 48 43 14 -1.96 - 7 0 0 46 17 41 6 23 28.4 15 138 -12 44 6 18 48 40 5 43 53 24 48 55 22 -1.96 - 8 0 0 46 29 45 6 23 27.1 15 137 -13 44 17 58 48 52 40 44 5 2 49 8 1 -1.96 - 9 0 0 46 42 19 6 23 25.9 14 136 -14 44 30 6 49 5 47 44 17 8 49 21 12 -1.97 - 10 0 0 46 55 21 6 23 24.7 13 135 -14 44 42 42 49 19 24 44 29 42 49 34 53 -1.97 - 11 0 0 47 8 53 6 23 23.6 13 134 -15 44 55 46 49 33 30 44 42 43 49 49 4 -1.97 - 12 0 0 47 22 53 6 23 22.5 12 134 -16 45 9 17 49 48 7 44 56 12 50 3 45 -1.97 - 13 0 0 47 37 20 6 23 21.5 11 133 -16 45 23 15 50 3 13 45 10 7 50 18 56 -1.97 - 14 0 0 47 52 16 6 23 20.5 11 132 -17 45 37 40 50 18 48 45 24 29 50 34 36 -1.97 - 15 0 0 48 7 38 6 23 19.6 10 131 -18 45 52 31 50 34 52 45 39 17 50 50 44 -1.98 - 16 0 0 48 23 28 6 23 18.8 9 130 -18 46 7 48 50 51 24 45 54 30 51 7 22 -1.98 - 17 0 0 48 39 44 6 23 18.0 9 130 -19 46 23 30 51 8 24 46 10 10 51 24 27 -1.98 - 18 0 0 48 56 26 6 23 17.3 8 129 -20 46 39 37 51 25 52 46 26 14 51 42 0 -1.99 - 19 0 0 49 13 33 6 23 16.6 7 128 -20 46 56 8 51 43 46 46 42 42 52 0 0 -1.99 - 20 0 0 49 31 6 6 23 16.1 7 127 -21 47 13 4 52 2 7 46 59 35 52 18 27 -2.00 - 21 0 0 49 49 3 6 23 15.5 6 127 -22 47 30 24 52 20 54 47 16 51 52 37 19 -2.00 - 22 0 0 50 7 24 6 23 15.0 5 126 -22 47 48 6 52 40 6 47 34 30 52 56 38 -2.01 - 23 0 0 50 26 9 6 23 14.6 5 125 -23 48 6 11 52 59 43 47 52 31 53 16 21 -2.03 - 24 0 0 50 45 16 6 23 14.3 4 124 -23 48 24 38 53 19 45 48 10 55 53 36 30 -2.04 - 25 0 0 51 4 47 6 23 14.0 3 123 -24 48 43 27 53 40 10 48 29 40 53 57 2 -2.06 - 26 0 0 51 24 39 6 23 13.7 2 123 -25 49 2 37 54 0 59 48 48 46 54 17 57 -2.10 - 27 0 0 51 44 52 6 23 13.6 2 122 -25 49 22 7 54 22 10 49 8 12 54 39 15 -2.17 - 28 0 0 52 5 26 6 23 13.5 1 121 -26 49 41 57 .. .. .. 49 27 58 .. .. .. -2.32 - 29 0 0 52 26 19 6 23 13.4 0 120 -26 50 2 6 .. .. .. 49 48 4 .. .. .. -3.17 Uncertainty in time = +/- 1 secs Prediction of 2020 Dec 31.0 Data for the target star ------------------------ * name: TYC 6270-00474-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 28 00.5303 DE: -17 44 28.984 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 28 00.5303 DE: -17 44 28.984 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (48) Doris asteroid class: approx. diameter [km]: 222 approx. diameter ["]: 0.079 distance from Earth [AU]: 3.87970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: Preston date of fit: 2020 Dec 12 source of used astrometry: MPC, FASTT, TMO number of used observations: 3168 number of rejected observations: 22 time covered by the observations: 1960 May 09 - 2020 Oct 07 1 sigma uncertainty ellipse (major, minor, PA): 0.008", 0.004", 87.4° remarks: * orbital elements for (48)Doris : Mean anomaly = 188.43214426 deg Arg. of pericenter = 252.72967888 deg Long. of node = 183.54080053 deg Inclination = 6.54735440 deg Eccentricity = 0.07188415 Semimajor axis = 3.11048038 AU Perihelion dist = 2.88688615 AU Mag: H = 7.10, G = 0.15 Epoch of elements : MJD 59260.26700000 TDT (2021 Feb 15.2670) ------ occelmnt file for Occult BEGIN ----------------------------------- Preston2020Dec12,6.3,2021,2,15,6.4101,-0.09940,0.88145,19.70889,2.22534,-0.00464,0.00014,0.00000,0.00000 35.6679,-17.7283,87.38,-12.58,False TYC 6270-00474-1,18.46681393,-17.7413844,12.50,11.70,11.27,0.0,0,,18.48678952,-17.7282684 48,Doris,13.42,222.0,3.8797,0,0,3.127,5.05,,11.2 0,188.3842,2021,2,15,252.7297,183.5408,6.5474,0.07188,3.11048,2.88689,7.10,5.0,0.15 1.051,0.0080,0.0040,87,0.0040,Known errors 20210215_0474-1,59214.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2020 Dec 31, 01:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org