IOTA/IOTA-ES occultation update for (41) Daphne / UCAC4-481-017350 event on 2021 Mar 04, 22:52 UT Visible from Europe, Africa, South America Summary ------- On 2021 Mar 04 UT, the 187.4 km diameter asteroid (41) Daphne will occult a 12.5 mag star in the constellation Orion for observers along a path across Europe, Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.79 mag to 12.55 mag (the magnitude of the asteroid) for at most 20.1 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: 2021 Mar 04, 22:41 - 2021 Mar 04, 23:03 * geocentric midpoint of event [JD]: 2459278.45312083 * magnitude of target star: 12.48 * magnitude drop [mag]: 0.79 * estimated maximum duration [s]: 20.1 * Moon: 62 % sunlit, 144° distance * Sun: 108° distance * rough path description: Europe, Africa, South America The occultation path -------------------- * approximate projected width [km]: 199 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.014", 175°) * approx speed of asteroid's shadow [km/s]: 9.3381 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-481-017350 by 41 Daphne #1 on 2021 Mar 4 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 .. .. .. -82 0 0 .. .. .... .. .. .. ... .. .. ... .. .. - 90 17 6 ... .. .. .... - 94 39 16 -81 0 0 22 41 48.1 0 45 10 - 87 3 36 ... .. .. - 85 0 55 ... .. .. .... - 89 9 0 -80 0 0 22 41 48.4 2 39 10 - 82 43 21 - 96 10 6 - 80 57 41 - 98 19 46 0.15 Latitude Latitude Latitude Latitude - 89 0 0 -79 58 7 22 41 48.4 2 39 10 -81 22 31 -78 34 55 -81 46 55 -78 11 17 0.29 - 88 0 0 -79 45 11 22 41 48.5 2 38 10 -81 11 12 -78 20 24 -81 36 5 -77 56 21 0.28 - 87 0 0 -79 31 32 22 41 48.6 2 37 9 -80 59 16 -78 5 8 -81 24 39 -77 40 37 0.29 - 86 0 0 -79 17 8 22 41 48.8 3 36 9 -80 46 40 -77 49 1 -81 12 34 -77 24 2 0.29 - 85 0 0 -79 1 56 22 41 49.0 3 35 9 -80 33 20 -77 32 2 -80 59 48 -77 6 33 0.30 - 84 0 0 -78 45 52 22 41 49.2 3 34 9 -80 19 14 -77 14 6 -80 46 17 -76 48 5 0.30 - 83 0 0 -78 28 53 22 41 49.5 4 33 9 -80 4 18 -76 55 9 -80 31 57 -76 28 35 0.31 - 82 0 0 -78 10 54 22 41 49.8 4 32 9 -79 48 28 -76 35 6 -80 16 46 -76 7 59 0.31 - 81 0 0 -77 51 50 22 41 50.1 4 31 9 -79 31 40 -76 13 54 -80 0 38 -75 46 11 0.32 - 80 0 0 -77 31 37 22 41 50.5 5 30 9 -79 13 50 -75 51 26 -79 43 30 -75 23 6 0.32 - 79 0 0 -77 10 9 22 41 51.0 5 29 8 -78 54 51 -75 27 38 -79 25 16 -74 58 39 0.32 - 78 0 0 -76 47 20 22 41 51.5 6 28 8 -78 34 39 -75 2 22 -79 5 51 -74 32 42 0.32 - 77 0 0 -76 23 4 22 41 52.1 6 27 8 -78 13 6 -74 35 32 -78 45 7 -74 5 10 0.32 - 76 0 0 -75 57 13 22 41 52.8 7 26 8 -77 50 7 -74 7 0 -78 23 0 -73 35 54 0.32 - 75 0 0 -75 29 39 22 41 53.5 7 25 8 -77 25 34 -73 36 39 -77 59 20 -73 4 46 0.33 - 74 0 0 -75 0 14 22 41 54.4 8 24 8 -76 59 17 -73 4 19 -77 34 0 -72 31 38 0.33 - 73 0 0 -74 28 48 22 41 55.5 8 23 7 -76 31 8 -72 29 50 -77 6 51 -71 56 20 0.33 - 72 0 0 -73 55 11 22 41 56.6 9 23 7 -76 0 56 -71 53 3 -76 37 41 -71 18 41 0.33 - 71 0 0 -73 19 10 22 41 58.0 10 22 7 -75 28 29 -71 13 45 -76 6 20 -70 38 30 0.33 - 70 0 0 -72 40 34 22 41 59.5 10 21 6 -74 53 36 -70 31 45 -75 32 34 -69 55 33 0.33 - 69 0 0 -71 59 8 22 42 1.2 11 20 6 -74 16 2 -69 46 48 -74 56 11 -69 9 39 0.33 - 68 0 0 -71 14 37 22 42 3.3 12 19 6 -73 35 31 -68 58 39 -74 16 54 -68 20 32 0.33 - 67 0 0 -70 26 46 22 42 5.6 13 18 5 -72 51 48 -68 7 5 -73 34 26 -67 27 56 0.33 - 66 0 0 -69 35 17 22 42 8.2 14 17 5 -72 4 33 -67 11 46 -72 48 30 -66 31 37 0.33 - 65 0 0 -68 39 51 22 42 11.3 15 16 5 -71 13 26 -66 12 27 -71 58 44 -65 31 15 0.33 - 64 0 0 -67 40 8 22 42 14.8 16 15 4 -70 18 7 -65 8 49 -71 4 47 -64 26 33 0.33 - 63 0 0 -66 35 47 22 42 18.8 17 14 4 -69 18 13 -64 0 31 -70 6 16 -63 17 12 0.33 - 62 0 0 -65 26 27 22 42 23.4 18 13 3 -68 13 19 -62 47 16 -69 2 45 -62 2 54 0.33 - 61 0 0 -64 11 45 22 42 28.8 19 12 3 -67 3 0 -61 28 42 -67 53 49 -60 43 19 0.33 - 60 0 0 -62 51 20 22 42 34.9 21 11 2 -65 46 51 -60 4 32 -66 39 1 -59 18 8 0.33 - 59 0 0 -61 24 50 22 42 41.9 22 10 1 -64 24 28 -58 34 26 -65 17 56 -57 47 6 0.33 - 58 0 0 -59 51 55 22 42 50.0 24 9 0 -62 55 25 -56 58 10 -63 50 6 -56 9 55 0.33 - 57 0 0 -58 12 19 22 42 59.2 26 8 -1 -61 19 21 -55 15 28 -62 15 10 -54 26 25 0.33 - 56 0 0 -56 25 47 22 43 9.7 27 7 -1 -59 35 58 -53 26 12 -60 32 46 -52 36 25 0.33 - 55 0 0 -54 32 11 22 43 21.6 29 6 -3 -57 45 1 -51 30 16 -58 42 40 -50 39 52 0.33 - 54 0 0 -52 31 26 22 43 35.1 31 5 -4 -55 46 23 -49 27 40 -56 44 42 -48 36 46 0.33 - 53 0 0 -50 23 37 22 43 50.2 34 3 -5 -53 40 4 -47 18 32 -54 38 51 -46 27 17 0.33 - 52 0 0 -48 8 56 22 44 7.2 36 2 -6 -51 26 13 -45 3 5 -52 25 14 -44 11 38 0.33 - 51 0 0 -45 47 44 22 44 25.9 38 1 -7 -49 5 7 -42 41 44 -50 4 9 -41 50 14 0.33 - 50 0 0 -43 20 29 22 44 46.6 41 359 -9 -46 37 15 -40 14 58 -47 36 5 -39 23 35 0.33 - 49 0 0 -40 47 50 22 45 9.2 43 358 -10 -44 3 17 -37 43 25 -45 1 41 -36 52 20 0.33 - 48 0 0 -38 10 33 22 45 33.5 46 356 -12 -41 23 59 -35 7 52 -42 21 43 -34 17 14 0.33 - 47 0 0 -35 29 33 22 45 59.7 48 354 -14 -38 40 18 -32 29 8 -39 37 11 -31 39 7 0.33 - 46 0 0 -32 45 45 22 46 27.4 51 352 -15 -35 53 15 -29 48 10 -36 49 5 -28 58 53 0.33 - 45 0 0 -30 0 13 22 46 56.6 54 350 -17 -33 3 57 -27 5 55 -33 58 35 -26 17 31 0.34 - 44 0 0 -27 13 57 22 47 27.0 56 347 -19 -30 13 28 -24 23 20 -31 6 47 -23 35 55 0.34 - 43 0 0 -24 27 57 22 47 58.3 58 344 -21 -27 22 56 -21 41 22 -28 14 49 -20 55 1 0.34 - 42 0 0 -21 43 11 22 48 30.2 61 341 -23 -24 33 22 -19 0 51 -25 23 46 -18 15 38 0.34 - 41 0 0 -19 0 30 22 49 2.7 63 337 -24 -21 45 44 -16 22 36 -22 34 35 -15 38 34 0.34 - 40 0 0 -16 20 39 22 49 35.2 65 332 -26 -19 0 50 -13 47 16 -19 48 7 -13 4 28 0.35 - 39 0 0 -13 44 17 22 50 7.7 66 327 -28 -16 19 25 -11 15 28 -17 5 8 -10 33 54 0.35 - 38 0 0 -11 11 56 22 50 40.0 68 321 -30 -13 42 2 - 8 47 39 -14 26 13 - 8 7 18 0.35 - 37 0 0 - 8 43 59 22 51 11.7 69 314 -31 -11 9 9 - 6 24 11 -11 51 50 - 5 45 2 0.36 - 36 0 0 - 6 20 45 22 51 42.9 70 307 -33 - 8 41 8 - 4 5 19 - 9 22 20 - 3 27 22 0.36 - 35 0 0 - 4 2 25 22 52 13.2 70 300 -34 - 6 18 10 - 1 51 14 - 6 57 58 - 1 14 26 0.36 - 34 0 0 - 1 49 8 22 52 42.7 70 293 -36 - 4 0 25 0 17 58 - 4 38 52 0 53 39 0.36 - 33 0 0 0 19 5 22 53 11.3 70 287 -37 - 1 47 56 2 22 15 - 2 25 5 2 56 52 0.37 - 32 0 0 2 22 15 22 53 38.9 69 281 -39 0 19 17 4 21 38 - 0 16 39 4 55 14 0.37 - 31 0 0 4 20 24 22 54 5.5 68 276 -40 2 21 18 6 16 12 1 46 32 6 48 49 0.37 - 30 0 0 6 13 38 22 54 31.0 67 271 -41 4 18 12 8 6 2 3 44 32 8 37 43 0.37 - 29 0 0 8 2 6 22 54 55.5 66 267 -42 6 10 7 9 51 16 5 37 30 10 22 3 0.38 - 28 0 0 9 45 55 22 55 19.0 65 264 -43 7 57 13 11 32 1 7 25 35 12 1 58 0.38 - 27 0 0 11 25 15 22 55 41.4 64 261 -44 9 39 39 13 8 28 9 8 56 13 37 36 0.38 - 26 0 0 13 0 17 22 56 2.9 62 258 -45 11 17 36 14 40 44 10 47 45 15 9 7 0.38 - 25 0 0 14 31 10 22 56 23.4 61 256 -46 12 51 14 16 9 1 12 22 13 16 36 41 0.38 - 24 0 0 15 58 4 22 56 42.9 60 255 -47 14 20 45 17 33 28 13 52 30 18 0 27 0.38 - 23 0 0 17 21 11 22 57 1.6 58 253 -48 15 46 18 18 54 15 15 18 47 19 20 36 0.39 - 22 0 0 18 40 39 22 57 19.4 57 252 -49 17 8 6 20 11 32 16 41 16 20 37 16 0.39 - 21 0 0 19 56 39 22 57 36.4 55 251 -49 18 26 17 21 25 27 18 0 6 21 50 36 0.39 - 20 0 0 21 9 20 22 57 52.6 54 250 -50 19 41 2 22 36 10 19 15 27 23 0 47 0.39 - 19 0 0 22 18 51 22 58 8.1 53 250 -50 20 52 30 23 43 50 20 27 30 24 7 55 0.39 - 18 0 0 23 25 22 22 58 22.9 51 249 -51 22 0 51 24 48 34 21 36 24 25 12 10 0.39 - 17 0 0 24 28 59 22 58 36.9 50 249 -52 23 6 13 25 50 32 22 42 17 26 13 40 0.39 - 16 0 0 25 29 52 22 58 50.3 49 249 -52 24 8 45 26 49 49 23 45 18 27 12 31 0.39 - 15 0 0 26 28 7 22 59 3.1 48 248 -52 25 8 34 27 46 35 24 45 34 28 8 51 0.39 - 14 0 0 27 23 52 22 59 15.4 46 248 -53 26 5 48 28 40 55 25 43 14 29 2 47 0.39 - 13 0 0 28 17 14 22 59 27.0 45 248 -53 27 0 34 29 32 55 26 38 25 29 54 25 0.39 - 12 0 0 29 8 18 22 59 38.2 44 248 -54 27 52 58 30 22 43 27 31 13 30 43 52 0.39 - 11 0 0 29 57 12 22 59 48.8 43 249 -54 28 43 7 31 10 23 28 21 44 31 31 12 0.39 - 10 0 0 30 44 0 22 59 59.0 42 249 -54 29 31 7 31 56 2 29 10 5 32 16 31 0.39 - 9 0 0 31 28 48 23 0 8.7 41 249 -54 30 17 3 32 39 44 29 56 22 32 59 55 0.39 - 8 0 0 32 11 41 23 0 17.9 40 249 -55 31 1 1 33 21 35 30 40 38 33 41 28 0.39 - 7 0 0 32 52 44 23 0 26.8 39 249 -55 31 43 6 34 1 38 31 23 1 34 21 14 0.39 - 6 0 0 33 32 1 23 0 35.3 38 250 -55 32 23 21 34 39 59 32 3 34 34 59 19 0.39 - 5 0 0 34 9 37 23 0 43.4 37 250 -55 33 1 53 35 16 40 32 42 21 35 35 45 0.39 - 4 0 0 34 45 35 23 0 51.1 36 251 -55 33 38 44 35 51 47 33 19 28 36 10 38 0.39 - 3 0 0 35 19 59 23 0 58.6 35 251 -55 34 13 58 36 25 23 33 54 57 36 44 0 0.39 - 2 0 0 35 52 54 23 1 5.7 34 251 -55 34 47 40 36 57 31 34 28 53 37 15 55 0.39 - 1 0 0 36 24 21 23 1 12.5 33 252 -55 35 19 53 37 28 14 35 1 19 37 46 25 0.39 0 0 0 36 54 24 23 1 18.9 32 252 -55 35 50 40 37 57 36 35 32 18 38 15 35 0.39 1 0 0 37 23 7 23 1 25.2 31 253 -55 36 20 4 38 25 39 36 1 54 38 43 27 0.39 2 0 0 37 50 32 23 1 31.1 30 253 -55 36 48 8 38 52 25 36 30 10 39 10 3 0.39 3 0 0 38 16 42 23 1 36.8 29 254 -55 37 14 54 39 17 59 36 57 7 39 35 26 0.39 4 0 0 38 41 38 23 1 42.3 28 254 -55 37 40 26 39 42 21 37 22 49 39 59 39 0.39 5 0 0 39 5 24 23 1 47.5 27 255 -55 38 4 45 40 5 34 37 47 18 40 22 43 0.39 6 0 0 39 28 1 23 1 52.5 26 255 -55 38 27 54 40 27 41 38 10 36 40 44 41 0.39 7 0 0 39 49 33 23 1 57.3 25 256 -55 38 49 55 40 48 43 38 32 46 41 5 35 0.39 8 0 0 40 9 59 23 2 1.8 25 257 -55 39 10 51 41 8 42 38 53 49 41 25 26 0.39 9 0 0 40 29 23 23 2 6.2 24 257 -55 39 30 41 41 27 39 39 13 48 41 44 16 0.39 10 0 0 40 47 46 23 2 10.4 23 258 -55 39 49 30 41 45 38 39 32 44 42 2 7 0.39 11 0 0 41 5 10 23 2 14.4 22 258 -55 40 7 18 42 2 38 39 50 39 42 19 1 0.39 12 0 0 41 21 36 23 2 18.2 21 259 -54 40 24 6 42 18 42 40 7 34 42 34 58 0.39 13 0 0 41 37 5 23 2 21.8 21 260 -54 40 39 57 42 33 50 40 23 31 42 50 1 0.39 14 0 0 41 51 39 23 2 25.3 20 260 -54 40 54 51 42 48 5 40 38 31 43 4 10 0.39 15 0 0 42 5 20 23 2 28.6 19 261 -54 41 8 50 43 1 27 40 52 35 43 17 27 0.39 16 0 0 42 18 7 23 2 31.8 18 262 -54 41 21 55 43 13 57 41 5 45 43 29 52 0.39 17 0 0 42 30 3 23 2 34.8 17 262 -54 41 34 7 43 25 37 41 18 2 43 41 28 0.38 18 0 0 42 41 8 23 2 37.7 17 263 -53 41 45 27 43 36 27 41 29 27 43 52 13 0.38 19 0 0 42 51 23 23 2 40.4 16 264 -53 41 55 56 43 46 28 41 40 0 44 2 11 0.38 20 0 0 43 0 49 23 2 42.9 15 264 -53 42 5 35 43 55 41 41 49 43 44 11 21 0.38 21 0 0 43 9 27 23 2 45.4 14 265 -53 42 14 25 44 4 8 41 58 36 44 19 43 0.38 22 0 0 43 17 17 23 2 47.7 14 266 -53 42 22 26 44 11 47 42 6 40 44 27 20 0.38 23 0 0 43 24 20 23 2 49.9 13 266 -52 42 29 39 44 18 41 42 13 56 44 34 11 0.38 24 0 0 43 30 37 23 2 51.9 12 267 -52 42 36 5 44 24 49 42 20 24 44 40 17 0.38 25 0 0 43 36 8 23 2 53.8 11 268 -52 42 41 44 44 30 13 42 26 6 44 45 38 0.38 26 0 0 43 40 54 23 2 55.6 11 268 -52 42 46 37 44 34 52 42 31 0 44 50 16 0.38 27 0 0 43 44 55 23 2 57.3 10 269 -51 42 50 43 44 38 47 42 35 9 44 54 9 0.38 28 0 0 43 48 11 23 2 58.8 9 270 -51 42 54 4 44 41 58 42 38 31 44 57 19 0.38 29 0 0 43 50 43 23 3 0.3 9 270 -51 42 56 40 44 44 27 42 41 8 44 59 46 0.38 30 0 0 43 52 31 23 3 1.6 8 271 -51 42 58 31 44 46 11 42 43 0 45 1 30 0.38 31 0 0 43 53 34 23 3 2.8 7 272 -50 42 59 37 44 47 13 42 44 6 45 2 32 0.38 32 0 0 43 53 55 23 3 3.9 6 272 -50 42 59 58 44 47 32 42 44 28 45 2 51 0.39 33 0 0 43 53 31 23 3 4.8 6 273 -50 42 59 35 44 47 9 42 44 4 45 2 27 0.39 34 0 0 43 52 24 23 3 5.7 5 274 -49 42 58 27 44 46 2 42 42 56 45 1 21 0.39 35 0 0 43 50 33 23 3 6.4 4 274 -49 42 56 34 44 44 13 42 41 3 44 59 32 0.39 36 0 0 43 47 59 23 3 7.0 3 275 -49 42 53 57 44 41 41 42 38 26 44 57 1 0.40 37 0 0 43 44 40 23 3 7.5 3 276 -49 42 50 35 44 38 27 42 35 3 44 53 47 0.40 38 0 0 43 40 38 23 3 7.9 2 277 -48 42 46 29 44 34 29 42 30 55 44 49 50 0.41 39 0 0 43 35 51 23 3 8.2 1 277 -48 42 41 37 44 29 47 42 26 1 44 45 11 0.44 40 0 0 43 30 20 23 3 8.3 1 278 -48 42 36 0 44 24 23 42 20 22 44 39 48 0.54 Uncertainty in time = +/- 3 secs Prediction of 2021 Feb 28.0 Data for the target star ------------------------ * name: UCAC4-481-017350 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 13 36.2736 DE: +06 07 19.501 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 13 36.2736 DE: +06 07 19.500 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (41) Daphne asteroid class: ShapeModel asteroid system: multiple bodies approx. diameter [km]: 187 approx. diameter ["]: 0.109 distance from Earth [AU]: 2.36420 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2021 Feb 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): 0.016", 0.009", -2.312° remarks: * orbital elements for (41)Daphne : Mean anomaly = 279.95206695 deg Arg. of pericenter = 45.92507998 deg Long. of node = 178.05931878 deg Inclination = 15.78811271 deg Eccentricity = 0.27479091 Semimajor axis = 2.76172409 AU Perihelion dist = 2.00282742 AU Mag: H = 7.44, G = 0.10 Epoch of elements : MJD 59277.95305556 TDT (2021 Mar 04.9531) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342021Feb24 Binary solution 1 : Kepler,20.1,2021,3,4,22.8749,0.30704,-0.14968,2.34690,4.71936,0.00553,0.00043,0.00000,0.00000 -52.3545,6.1140,-160.23,-6.07,False UCAC4-481-017350,6.22674267,6.1220835,0.00,12.48,0.00,0.0,0,,6.24551458,6.1140460 41,Daphne #1,12.55,187.4,2.3642,0,1,0.586,17.55,,9.3 Peneius,2,443,1.100000,,,,,, 0,279.7474,2021,3,4,45.9251,178.0593,15.7881,0.27479,2.76172,2.00283,7.44,5.0,0.15 1.143,0.0160,0.0107,178,0.0113,Known errors + binary orbit,-1.00,-1,-1,-1 20210304_017350_Ma1,59273.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2021 Feb 28, 21:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org