IOTA/IOTA-ES occultation update for (667) Denise / UCAC4 455-046208 event on 2024 Oct 16, 16:30 UT Visible from Summary ------- On 2024 Oct 16 UT, the 88.852 km diameter asteroid (667) Denise will occult a 11.8 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.01 mag to 14.76 mag (the magnitude of the asteroid) for at most 3.340 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 Oct 16, 16:26 - 2024 Oct 16, 16:34 * geocentric midpoint of event [JD]: 2460600.18814296 * magnitude of target star: 11.82 * magnitude drop [mag]: 3.01 * estimated maximum duration [s]: 3.340 * Moon: 99 % sunlit, 119° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 92 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.002", 80°) * approx speed of asteroid's shadow [km/s]: 26.6155 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 455-046208 by 667 Denise on 2024 Oct 16 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 130 0 0 0 56 37 16 27 3.1 1 89 -68 0 31 44 1 21 27 0 19 46 1 33 21 .... 131 0 0 0 57 10 16 27 3.2 2 89 -67 0 32 17 1 22 0 0 20 20 1 33 54 0.17 132 0 0 0 57 26 16 27 3.4 3 89 -66 0 32 33 1 22 16 0 20 36 1 34 10 0.20 133 0 0 0 57 25 16 27 3.6 4 89 -65 0 32 32 1 22 15 0 20 35 1 34 10 0.22 134 0 0 0 57 7 16 27 3.9 5 89 -64 0 32 14 1 21 58 0 20 16 1 33 52 0.23 135 0 0 0 56 32 16 27 4.3 6 89 -63 0 31 39 1 21 22 0 19 41 1 33 17 0.23 136 0 0 0 55 40 16 27 4.8 7 89 -62 0 30 46 1 20 30 0 18 49 1 32 25 0.23 137 0 0 0 54 30 16 27 5.3 8 89 -61 0 29 37 1 19 21 0 17 39 1 31 16 0.24 138 0 0 0 53 4 16 27 5.9 9 89 -61 0 28 10 1 17 55 0 16 13 1 29 49 0.24 139 0 0 0 51 21 16 27 6.6 10 89 -60 0 26 27 1 16 12 0 14 29 1 28 6 0.24 140 0 0 0 49 20 16 27 7.3 11 89 -59 0 24 26 1 14 12 0 12 28 1 26 6 0.24 141 0 0 0 47 2 16 27 8.2 12 89 -58 0 22 8 1 11 54 0 10 10 1 23 49 0.24 142 0 0 0 44 28 16 27 9.1 13 89 -57 0 19 33 1 9 20 0 7 35 1 21 15 0.24 143 0 0 0 41 36 16 27 10.1 14 89 -56 0 16 41 1 6 29 0 4 43 1 18 24 0.25 144 0 0 0 38 28 16 27 11.1 15 89 -55 0 13 32 1 3 20 0 1 33 1 15 16 0.25 145 0 0 0 35 2 16 27 12.2 16 89 -54 0 10 6 0 59 55 - 0 1 53 1 11 51 0.25 146 0 0 0 31 19 16 27 13.5 17 89 -53 0 6 23 0 56 13 - 0 5 36 1 8 9 0.25 147 0 0 0 27 20 16 27 14.7 18 89 -52 0 2 23 0 52 14 - 0 9 36 1 4 10 0.25 148 0 0 0 23 4 16 27 16.1 19 89 -51 - 0 1 54 0 47 58 - 0 13 53 0 59 55 0.25 149 0 0 0 18 30 16 27 17.5 20 89 -50 - 0 6 28 0 43 26 - 0 18 27 0 55 22 0.25 150 0 0 0 13 41 16 27 19.0 21 89 -49 - 0 11 18 0 38 37 - 0 23 18 0 50 33 0.25 151 0 0 0 8 34 16 27 20.6 22 89 -48 - 0 16 25 0 33 31 - 0 28 26 0 45 28 0.25 152 0 0 0 3 11 16 27 22.2 23 89 -47 - 0 21 49 0 28 8 - 0 33 50 0 40 5 0.25 153 0 0 - 0 2 29 16 27 23.9 24 89 -46 - 0 27 30 0 22 29 - 0 39 30 0 34 26 0.25 154 0 0 - 0 8 25 16 27 25.7 25 89 -45 - 0 33 27 0 16 33 - 0 45 28 0 28 31 0.25 155 0 0 - 0 14 38 16 27 27.6 26 89 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26 -29 52 5 -28 38 32 0.27 - 59 0 0 -29 17 44 16 34 46.6 5 274 66 -29 42 36 -28 52 54 -29 54 32 -28 41 1 0.27 - 58 0 0 -29 19 57 16 34 46.9 4 273 66 -29 44 49 -28 55 8 -29 56 45 -28 43 15 0.27 - 57 0 0 -29 21 56 16 34 47.1 4 273 65 -29 46 47 -28 57 7 -29 58 44 -28 45 14 0.28 - 56 0 0 -29 23 39 16 34 47.3 3 272 65 -29 48 31 -28 58 51 -30 0 27 -28 46 58 0.29 - 55 0 0 -29 25 8 16 34 47.5 2 272 64 -29 49 59 -29 0 20 -30 1 56 -28 48 27 0.31 - 54 0 0 -29 26 22 16 34 47.6 1 271 64 -29 51 13 -29 1 34 -30 3 10 -28 49 41 0.37 - 53 0 0 -29 27 22 16 34 47.6 0 271 63 -29 52 13 -29 2 34 -30 4 9 -28 50 41 3.55 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 455-046208 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 46 14.1527 DE: +00 54 04.568 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 46 14.1527 DE: +00 54 04.568 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (667) Denise asteroid class: approx. diameter [km]: 89 approx. diameter ["]: 0.045 distance from Earth [AU]: 2.74980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Apr 27 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): 0.025", 0.002", 79.834° remarks: * orbital elements for (667)Denise : Mean anomaly = 7.1309532954 deg Arg. of pericenter = 304.9187468756 deg Long. of node = 153.1429412847 deg Inclination = 25.3676987380 deg Eccentricity = 0.1883604165 Semimajor axis = 3.1879653764 AU Perihelion dist = 2.5874788904 AU Mag: H = 9.45, G = 0.15 Epoch of elements : MJD 60599.68814242 TDT (2024 Oct 16.6881) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr27,3.34,2024,10,16,16.515431,-0.063452,-0.236554,14.503393,-3.915134,-0.005278,0.000942,0.000000,0.000000 -141.5377,0.8136,-71.38,-9.24,False UCAC4 455-046208,8.77059793,0.9012690,12.22,11.82,11.60,0.0,0,,8.79173641,0.8136027,3.01,2.79,0,0,0 667,Denise,14.76,88.852,2.7498,0,0,3.093,-12.52,,5.0,0 0,7.0118,2024,10,16,304.9187,153.1429,25.3677,0.18836,3.18797,2.58748,9.45,5.0,0.15 1.240,0.0247,0.0021,80,0.0107,Known errors,1.26,0,-1,-1 20241016_046208,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org