IOTA/IOTA-ES occultation update for (5505) Rundetaarn / UCAC4 316-189541 event on 2024 Oct 22, 20:39 UT Visible from Summary ------- On 2024 Oct 22 UT, the 22.7964494559954 km diameter asteroid (5505) Rundetaarn will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.12 mag to 17.81 mag (the magnitude of the asteroid) for at most 0.830 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 Oct 22, 20:35 - 2024 Oct 22, 20:42 * geocentric midpoint of event [JD]: 2460606.36044025 * magnitude of target star: 11.69 * magnitude drop [mag]: 6.12 * estimated maximum duration [s]: 0.830 * Moon: 64 % sunlit, 173° distance * Sun: 66° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 75°) * approx speed of asteroid's shadow [km/s]: 29.1467 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 316-189541 by 5505 Rundetaarn on 2024 Oct 22 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 -151 0 0 4 11 10 20 35 32.7 1 117 66 4 3 28 4 18 53 3 58 45 4 23 36 .... -150 0 0 3 40 56 20 35 32.8 2 117 67 3 33 15 3 48 37 3 28 32 3 53 20 -0.13 -149 0 0 3 11 1 20 35 33.0 3 117 68 3 3 21 3 18 41 2 58 39 3 23 23 -0.19 -148 0 0 2 41 26 20 35 33.3 4 117 69 2 33 47 2 49 5 2 29 6 2 53 47 -0.22 -147 0 0 2 12 13 20 35 33.6 5 117 70 2 4 35 2 19 51 1 59 55 2 24 32 -0.23 -146 0 0 1 43 22 20 35 34.1 6 117 71 1 35 45 1 50 59 1 31 6 1 55 39 -0.25 -145 0 0 1 14 54 20 35 34.6 7 117 72 1 7 18 1 22 30 1 2 39 1 27 9 -0.25 -144 0 0 0 46 49 20 35 35.2 9 117 73 0 39 14 0 54 23 0 34 36 0 59 2 -0.26 -143 0 0 0 19 7 20 35 35.9 10 117 74 0 11 34 0 26 41 0 6 56 0 31 19 -0.26 -142 0 0 - 0 8 10 20 35 36.7 11 117 75 - 0 15 42 - 0 0 37 - 0 20 19 0 4 0 -0.27 -141 0 0 - 0 35 1 20 35 37.6 12 117 76 - 0 42 32 - 0 27 30 - 0 47 9 - 0 22 54 -0.27 -140 0 0 - 1 1 28 20 35 38.5 13 117 77 - 1 8 58 - 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5 35 45 - 5 54 44 - 5 31 17 -0.29 -127 0 0 - 6 3 20 20 35 57.5 27 117 82 - 6 10 35 - 5 56 5 - 6 15 1 - 5 51 38 -0.29 -126 0 0 - 6 23 8 20 35 59.4 28 117 81 - 6 30 22 - 6 15 54 - 6 34 48 - 6 11 28 -0.29 -125 0 0 - 6 42 26 20 36 1.4 29 117 81 - 6 49 39 - 6 35 13 - 6 54 4 - 6 30 47 -0.29 -124 0 0 - 7 1 13 20 36 3.5 30 117 80 - 7 8 25 - 6 54 1 - 7 12 50 - 6 49 36 -0.29 -123 0 0 - 7 19 30 20 36 5.6 31 117 79 - 7 26 41 - 7 12 18 - 7 31 5 - 7 7 54 -0.29 -122 0 0 - 7 37 15 20 36 7.8 32 117 79 - 7 44 25 - 7 30 5 - 7 48 48 - 7 25 41 -0.29 -121 0 0 - 7 54 29 20 36 10.0 33 117 78 - 8 1 38 - 7 47 20 - 8 6 1 - 7 42 57 -0.29 -120 0 0 - 8 11 12 20 36 12.3 34 117 77 - 8 18 20 - 8 4 4 - 8 22 42 - 7 59 41 -0.29 -119 0 0 - 8 27 23 20 36 14.6 35 117 76 - 8 34 31 - 8 20 16 - 8 38 52 - 8 15 54 -0.29 -118 0 0 - 8 43 3 20 36 17.0 36 117 75 - 8 50 10 - 8 35 57 - 8 54 31 - 8 31 35 -0.29 -117 0 0 - 8 58 12 20 36 19.5 37 117 74 - 9 5 17 - 8 51 6 - 9 9 37 - 8 46 45 -0.29 -116 0 0 - 9 12 48 20 36 22.0 38 117 73 - 9 19 53 - 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39 0 0 - 1 7 10 20 40 54.5 54 222 -5 - 1 14 41 - 0 59 39 - 1 19 17 - 0 55 3 -0.30 - 38 0 0 - 0 40 32 20 40 58.1 53 223 -6 - 0 48 4 - 0 33 0 - 0 52 41 - 0 28 23 -0.30 - 37 0 0 - 0 13 28 20 41 1.6 52 223 -7 - 0 21 1 - 0 5 55 - 0 25 39 - 0 1 17 -0.30 - 36 0 0 0 14 2 20 41 5.1 51 224 -8 0 6 28 0 21 37 0 1 50 0 26 15 -0.30 - 35 0 0 0 41 58 20 41 8.5 50 224 -9 0 34 22 0 49 33 0 29 43 0 54 13 -0.30 - 34 0 0 1 10 18 20 41 11.8 49 225 -10 1 2 41 1 17 55 0 58 2 1 22 35 -0.30 - 33 0 0 1 39 3 20 41 15.2 48 225 -11 1 31 25 1 46 41 1 26 45 1 51 22 -0.30 - 32 0 0 2 8 11 20 41 18.5 47 226 -12 2 0 32 2 15 50 1 55 51 2 20 32 -0.30 - 31 0 0 2 37 42 20 41 21.7 46 226 -14 2 30 2 2 45 22 2 25 20 2 50 4 -0.30 - 30 0 0 3 7 35 20 41 24.9 44 227 -15 2 59 54 3 15 16 2 55 11 3 19 59 -0.30 - 29 0 0 3 37 49 20 41 28.0 43 227 -16 3 30 7 3 45 32 3 25 24 3 50 16 -0.30 - 28 0 0 4 8 25 20 41 31.1 42 227 -17 4 0 41 4 16 9 3 55 58 4 20 53 -0.30 - 27 0 0 4 39 20 20 41 34.1 41 228 -18 4 31 36 4 47 5 4 26 51 4 51 50 -0.30 - 26 0 0 5 10 35 20 41 37.0 40 228 -19 5 2 49 5 18 20 4 58 4 5 23 6 -0.30 - 25 0 0 5 42 7 20 41 39.9 39 228 -20 5 34 21 5 49 54 5 29 35 5 54 40 -0.30 - 24 0 0 6 13 58 20 41 42.7 38 229 -21 6 6 10 6 21 45 6 1 24 6 26 32 -0.30 - 23 0 0 6 46 4 20 41 45.5 37 229 -22 6 38 16 6 53 53 6 33 29 6 58 41 -0.30 - 22 0 0 7 18 27 20 41 48.2 36 229 -23 7 10 37 7 26 16 7 5 50 7 31 4 -0.30 - 21 0 0 7 51 4 20 41 50.8 35 230 -24 7 43 14 7 58 55 7 38 26 8 3 43 -0.30 - 20 0 0 8 23 55 20 41 53.3 33 230 -25 8 16 4 8 31 46 8 11 15 8 36 35 -0.30 - 19 0 0 8 56 59 20 41 55.8 32 230 -26 8 49 7 9 4 51 8 44 18 9 9 41 -0.30 - 18 0 0 9 30 14 20 41 58.2 31 230 -28 9 22 21 9 38 7 9 17 32 9 42 57 -0.30 - 17 0 0 10 3 41 20 42 0.5 30 231 -29 9 55 47 10 11 35 9 50 57 10 16 25 -0.30 - 16 0 0 10 37 17 20 42 2.7 29 231 -30 10 29 22 10 45 11 10 24 32 10 50 2 -0.30 - 15 0 0 11 11 2 20 42 4.9 28 231 -31 11 3 7 11 18 57 10 58 16 11 23 48 -0.29 - 14 0 0 11 44 54 20 42 7.0 27 232 -32 11 36 59 11 52 50 11 32 8 11 57 42 -0.29 - 13 0 0 12 18 54 20 42 9.0 26 232 -33 12 10 58 12 26 50 12 6 6 12 31 42 -0.29 - 12 0 0 12 52 59 20 42 10.9 25 232 -34 12 45 2 13 0 56 12 40 10 13 5 48 -0.29 - 11 0 0 13 27 8 20 42 12.7 23 232 -35 13 19 11 13 35 6 13 14 19 13 39 58 -0.29 - 10 0 0 14 1 21 20 42 14.5 22 233 -36 13 53 23 14 9 19 13 48 31 14 14 12 -0.29 - 9 0 0 14 35 36 20 42 16.1 21 233 -37 14 27 38 14 43 34 14 22 45 14 48 28 -0.29 - 8 0 0 15 9 52 20 42 17.7 20 233 -38 15 1 54 15 17 51 14 57 1 15 22 45 -0.29 - 7 0 0 15 44 9 20 42 19.2 19 234 -39 15 36 10 15 52 8 15 31 17 15 57 2 -0.29 - 6 0 0 16 18 25 20 42 20.6 18 234 -40 16 10 26 16 26 24 16 5 32 16 31 18 -0.29 - 5 0 0 16 52 38 20 42 21.9 17 234 -41 16 44 39 17 0 38 16 39 46 17 5 32 -0.29 - 4 0 0 17 26 49 20 42 23.2 16 235 -42 17 18 49 17 34 48 17 13 56 17 39 42 -0.29 - 3 0 0 18 0 55 20 42 24.3 14 235 -43 17 52 56 18 8 55 17 48 2 18 13 49 -0.29 - 2 0 0 18 34 56 20 42 25.4 13 235 -44 18 26 57 18 42 56 18 22 3 18 47 50 -0.29 - 1 0 0 19 8 51 20 42 26.3 12 236 -45 19 0 52 19 16 51 18 55 58 19 21 45 -0.29 0 0 0 19 42 39 20 42 27.2 11 236 -46 19 34 40 19 50 39 19 29 46 19 55 33 -0.29 1 0 0 20 16 18 20 42 28.0 10 236 -46 20 8 19 20 24 18 20 3 26 20 29 12 -0.29 2 0 0 20 49 49 20 42 28.7 9 237 -47 20 41 50 20 57 48 20 36 56 21 2 42 -0.29 3 0 0 21 23 9 20 42 29.4 8 237 -48 21 15 10 21 31 8 21 10 17 21 36 2 -0.29 4 0 0 21 56 18 20 42 29.9 7 237 -49 21 48 19 22 4 17 21 43 26 22 9 10 -0.29 5 0 0 22 29 15 20 42 30.4 6 238 -50 22 21 16 22 37 13 22 16 23 22 42 7 -0.29 6 0 0 23 1 58 20 42 30.8 5 238 -51 22 54 1 23 9 57 22 49 8 23 14 50 -0.29 7 0 0 23 34 29 20 42 31.1 4 239 -52 23 26 31 23 42 27 23 21 39 23 47 19 -0.29 8 0 0 24 6 44 20 42 31.3 3 239 -52 23 58 47 24 14 42 23 53 55 24 19 34 -0.29 9 0 0 24 38 44 20 42 31.4 1 239 -53 24 30 48 24 46 41 24 25 56 24 51 34 -0.28 10 0 0 25 10 28 20 42 31.5 0 240 -54 25 2 32 25 18 24 24 57 41 25 23 16 -0.25 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 316-189541 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 24 59.0600 DE: -26 53 11.350 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 24 59.0600 DE: -26 53 11.350 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.400) * V mag [mag]: 11.7 * B mag [mag]: 14.0 * Diameter [mas]: 0.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5505) Rundetaarn asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.99110 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.014", 0.003", 75.221° remarks: * orbital elements for (5505)Rundetaarn : Mean anomaly = 296.7177156253 deg Arg. of pericenter = 58.0181462997 deg Long. of node = 315.4188475589 deg Inclination = 11.0285403872 deg Eccentricity = 0.1413699591 Semimajor axis = 2.8748041930 AU Perihelion dist = 2.4683932418 AU Mag: H = 12.26, G = 0.15 Epoch of elements : MJD 60605.86044013 TDT (2024 Oct 22.8604) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.83,2024,10,22,20.650566,-0.059364,0.283039,16.107198,3.346721,0.005299,0.000096,-0.000001,0.000000 -64.8943,-26.8740,-133.67,-11.45,False UCAC4 316-189541,18.41640560,-26.8864860,13.97,11.69,10.46,0.7,4,,18.44201116,-26.8740123,6.12,6.90,0,0,0 5505,Rundetaarn,17.81,24.315,2.9911,0,0,3.540,9.84,,1.6,0 0,296.5437,2024,10,22,58.0181,315.4188,11.0285,0.14137,2.87480,2.46839,12.26,5.0,0.15 1.306,0.0137,0.0033,75,0.0034,Known errors,0.74,0,-1,-1 20241022_189541,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org