IOTA/IOTA-ES occultation update for (907) Rhoda / TYC 7919-01335-1 event on 2024 Oct 22, 19:53 UT Visible from Summary ------- On 2024 Oct 22 UT, the 73.1831232756343 km diameter asteroid (907) Rhoda will occult a 10.4 mag star in the constellation Corona Australis for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.49 mag to 15.88 mag (the magnitude of the asteroid) for at most 2.830 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, 19:49 - 2024 Oct 22, 19:57 * geocentric midpoint of event [JD]: 2460606.32861862 * magnitude of target star: 10.40 * magnitude drop [mag]: 5.49 * estimated maximum duration [s]: 2.830 * Moon: 65 % sunlit, 167° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 74 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 96°) * approx speed of asteroid's shadow [km/s]: 25.9349 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7919-01335-1 by 907 Rhoda 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 -143 0 0 .. .. .... .. .. .. .. .. .. - 7 22 17 .. .. .. - 7 28 24 .. .. .. .... -142 0 0 - 7 47 40 19 49 9.6 1 131 69 - 8 14 13 - 7 21 4 - 8 20 18 - 7 14 57 .... -141 0 0 - 8 39 2 19 49 9.8 3 131 70 - 9 5 28 - 8 12 34 - 9 11 32 - 8 6 30 -0.03 -140 0 0 - 9 29 43 19 49 10.1 4 131 71 - 9 56 1 - 9 3 23 -10 2 2 - 8 57 20 -0.07 -139 0 0 -10 19 39 19 49 10.6 5 131 72 -10 45 48 - 9 53 27 -10 51 48 - 9 47 26 -0.09 -138 0 0 -11 8 49 19 49 11.1 6 130 74 -11 34 50 -10 42 45 -11 40 48 -10 36 46 -0.10 -137 0 0 -11 57 13 19 49 11.8 8 130 75 -12 23 6 -11 31 17 -12 29 2 -11 25 20 -0.10 -136 0 0 -12 44 48 19 49 12.6 9 130 75 -13 10 32 -12 19 1 -13 16 26 -12 13 6 -0.11 -135 0 0 -13 31 35 19 49 13.5 10 130 76 -13 57 10 -13 5 57 -14 3 2 -13 0 4 -0.11 -134 0 0 -14 17 31 19 49 14.5 11 130 77 -14 42 58 -13 52 2 -14 48 48 -13 46 11 -0.12 -133 0 0 -15 2 37 19 49 15.7 13 129 78 -15 27 55 -14 37 17 -15 33 43 -14 31 28 -0.12 -132 0 0 -15 46 52 19 49 16.9 14 129 79 -16 12 1 -15 21 41 -16 17 47 -15 15 54 -0.12 -131 0 0 -16 30 15 19 49 18.2 15 129 79 -16 55 15 -16 5 12 -17 0 59 -15 59 27 -0.12 -130 0 0 -17 12 45 19 49 19.6 16 128 80 -17 37 37 -16 47 52 -17 43 19 -16 42 9 -0.13 -129 0 0 -17 54 23 19 49 21.1 17 128 80 -18 19 6 -17 29 38 -18 24 45 -17 23 57 -0.13 -128 0 0 -18 35 8 19 49 22.7 19 128 80 -18 59 41 -18 10 32 -19 5 19 -18 4 53 -0.13 -127 0 0 -19 14 59 19 49 24.3 20 128 80 -19 39 24 -18 50 32 -19 45 0 -18 44 56 -0.13 -126 0 0 -19 53 57 19 49 26.1 21 127 80 -20 18 13 -19 29 39 -20 23 47 -19 24 5 -0.13 -125 0 0 -20 32 2 19 49 27.9 22 127 80 -20 56 9 -20 7 53 -21 1 41 -20 2 20 -0.13 -124 0 0 -21 9 13 19 49 29.8 23 127 80 -21 33 12 -20 45 13 -21 38 42 -20 39 42 -0.13 -123 0 0 -21 45 32 19 49 31.7 24 126 80 -22 9 22 -21 21 40 -22 14 49 -21 16 11 -0.13 -122 0 0 -22 20 57 19 49 33.8 25 126 79 -22 44 38 -21 57 13 -22 50 4 -21 51 47 -0.13 -121 0 0 -22 55 28 19 49 35.9 27 126 79 -23 19 2 -22 31 54 -23 24 26 -22 26 29 -0.13 -120 0 0 -23 29 8 19 49 38.0 28 125 78 -23 52 32 -23 5 41 -23 57 55 -23 0 18 -0.14 -119 0 0 -24 1 54 19 49 40.2 29 125 77 -24 25 11 -23 38 36 -24 30 31 -23 33 15 -0.14 -118 0 0 -24 33 49 19 49 42.5 30 125 77 -24 56 58 -24 10 39 -25 2 16 -24 5 20 -0.14 -117 0 0 -25 4 52 19 49 44.8 31 124 76 -25 27 52 -24 41 50 -25 33 9 -24 36 32 -0.14 -116 0 0 -25 35 3 19 49 47.1 32 124 75 -25 57 56 -25 12 9 -26 3 11 -25 6 53 -0.14 -115 0 0 -26 4 24 19 49 49.5 33 123 74 -26 27 9 -25 41 37 -26 32 22 -25 36 23 -0.14 -114 0 0 -26 32 53 19 49 52.0 34 123 73 -26 55 31 -26 10 14 -27 0 42 -26 5 2 -0.14 -113 0 0 -27 0 33 19 49 54.4 35 123 73 -27 23 3 -26 38 1 -27 28 13 -26 32 51 -0.14 -112 0 0 -27 27 23 19 49 57.0 36 122 72 -27 49 46 -27 4 59 -27 54 54 -26 59 50 -0.14 -111 0 0 -27 53 24 19 49 59.5 37 122 71 -28 15 40 -27 31 7 -28 20 46 -27 26 0 -0.14 -110 0 0 -28 18 36 19 50 2.1 38 121 70 -28 40 45 -27 56 26 -28 45 49 -27 51 20 -0.14 -109 0 0 -28 43 0 19 50 4.8 39 121 69 -29 5 2 -28 20 56 -29 10 5 -28 15 52 -0.14 -108 0 0 -29 6 36 19 50 7.4 40 121 68 -29 28 32 -28 44 39 -29 33 33 -28 39 37 -0.14 -107 0 0 -29 29 25 19 50 10.1 41 120 67 -29 51 14 -29 7 34 -29 56 14 -29 2 33 -0.14 -106 0 0 -29 51 27 19 50 12.8 42 120 67 -30 13 10 -29 29 43 -30 18 9 -29 24 43 -0.14 -105 0 0 -30 12 43 19 50 15.6 43 120 66 -30 34 20 -29 51 5 -30 39 18 -29 46 7 -0.14 -104 0 0 -30 33 14 19 50 18.4 43 119 65 -30 54 45 -30 11 41 -30 59 41 -30 6 44 -0.14 -103 0 0 -30 52 59 19 50 21.2 44 119 64 -31 14 24 -30 31 32 -31 19 19 -30 26 37 -0.14 -102 0 0 -31 11 59 19 50 24.0 45 118 63 -31 33 19 -30 50 38 -31 38 13 -30 45 44 -0.14 -101 0 0 -31 30 15 19 50 26.9 46 118 62 -31 51 30 -31 8 59 -31 56 22 -31 4 6 -0.14 -100 0 0 -31 47 48 19 50 29.8 47 118 62 -32 8 57 -31 26 37 -32 13 48 -31 21 45 -0.14 - 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27 0 0 -23 12 50 19 54 51.0 65 220 -1 -23 36 23 -22 49 15 -23 41 47 -22 43 51 -0.15 - 26 0 0 -22 38 27 19 54 55.3 64 221 -2 -23 2 8 -22 14 43 -23 7 34 -22 9 16 -0.15 - 25 0 0 -22 3 9 19 54 59.6 63 221 -3 -22 26 59 -21 39 16 -22 32 27 -21 33 47 -0.15 - 24 0 0 -21 26 56 19 55 3.9 62 221 -4 -21 50 55 -21 2 55 -21 56 25 -20 57 24 -0.15 - 23 0 0 -20 49 48 19 55 8.2 60 221 -5 -21 13 57 -20 25 38 -21 19 29 -20 20 5 -0.15 - 22 0 0 -20 11 46 19 55 12.5 59 222 -6 -20 36 3 -19 47 26 -20 41 37 -19 41 51 -0.14 - 21 0 0 -19 32 48 19 55 16.8 58 222 -7 -19 57 15 -19 8 20 -20 2 51 -19 2 42 -0.14 - 20 0 0 -18 52 55 19 55 21.1 57 222 -8 -19 17 31 -18 28 17 -19 23 9 -18 22 38 -0.14 - 19 0 0 -18 12 7 19 55 25.4 56 222 -9 -18 36 52 -17 47 20 -18 42 33 -17 41 39 -0.14 - 18 0 0 -17 30 24 19 55 29.6 55 222 -10 -17 55 19 -17 5 28 -18 1 1 -16 59 44 -0.14 - 17 0 0 -16 47 46 19 55 33.8 54 222 -11 -17 12 50 -16 22 40 -17 18 35 -16 16 55 -0.14 - 16 0 0 -16 4 14 19 55 38.1 52 222 -13 -16 29 27 -15 38 59 -16 35 14 -15 33 11 -0.14 - 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5 42 3 -0.14 - 3 0 0 - 5 21 14 19 56 28.7 36 222 -28 - 5 48 19 - 4 54 6 - 5 54 32 - 4 47 52 -0.14 - 2 0 0 - 4 26 35 19 56 32.1 35 222 -29 - 4 53 47 - 3 59 20 - 5 0 2 - 3 53 4 -0.14 - 1 0 0 - 3 31 20 19 56 35.4 33 222 -30 - 3 58 40 - 3 3 58 - 4 4 55 - 2 57 41 -0.14 0 0 0 - 2 35 32 19 56 38.5 32 222 -32 - 3 2 58 - 2 8 3 - 3 9 16 - 2 1 45 -0.14 1 0 0 - 1 39 13 19 56 41.6 30 222 -33 - 2 6 46 - 1 11 38 - 2 13 4 - 1 5 18 -0.14 2 0 0 - 0 42 27 19 56 44.6 29 222 -34 - 1 10 5 - 0 14 46 - 1 16 25 - 0 8 24 -0.14 3 0 0 0 14 46 19 56 47.5 28 222 -35 - 0 12 58 0 42 32 - 0 19 19 0 48 55 -0.14 4 0 0 1 12 21 19 56 50.2 26 222 -37 0 44 32 1 40 12 0 38 10 1 46 36 -0.14 5 0 0 2 10 16 19 56 52.8 25 222 -38 1 42 22 2 38 11 1 35 59 2 44 36 -0.14 6 0 0 3 8 27 19 56 55.3 23 223 -39 2 40 30 3 36 27 2 34 5 3 42 53 -0.13 7 0 0 4 6 52 19 56 57.6 22 223 -40 3 38 51 4 34 56 3 32 26 4 41 23 -0.13 8 0 0 5 5 28 19 56 59.9 21 223 -41 4 37 24 5 33 35 4 30 58 5 40 3 -0.13 9 0 0 6 4 12 19 57 1.9 19 223 -42 5 36 5 6 32 21 5 29 38 6 38 49 -0.13 10 0 0 7 2 59 19 57 3.9 18 223 -44 6 34 50 7 31 11 6 28 23 7 37 40 -0.13 11 0 0 8 1 48 19 57 5.6 17 223 -45 7 33 37 8 30 2 7 27 10 8 36 31 -0.13 12 0 0 9 0 35 19 57 7.3 15 223 -46 8 32 23 9 28 50 8 25 55 9 35 19 -0.13 13 0 0 9 59 16 19 57 8.8 14 223 -47 9 31 4 10 27 32 9 24 36 10 34 1 -0.13 14 0 0 10 57 49 19 57 10.1 12 224 -48 10 29 36 11 26 5 10 23 8 11 32 34 -0.13 15 0 0 11 56 11 19 57 11.3 11 224 -49 11 27 58 12 24 26 11 21 30 12 30 55 -0.13 16 0 0 12 54 17 19 57 12.4 10 224 -50 12 26 6 13 22 32 12 19 38 13 29 1 -0.13 17 0 0 13 52 6 19 57 13.3 8 224 -51 13 23 56 14 20 20 13 17 29 14 26 48 -0.13 18 0 0 14 49 35 19 57 14.1 7 225 -52 14 21 26 15 17 46 14 14 59 15 24 14 -0.12 19 0 0 15 46 40 19 57 14.7 6 225 -53 15 18 33 16 14 49 15 12 7 16 21 16 -0.12 20 0 0 16 43 18 19 57 15.2 4 225 -54 16 15 15 17 11 24 16 8 49 17 17 52 -0.11 21 0 0 17 39 28 19 57 15.6 3 225 -55 17 11 28 18 7 31 17 5 3 18 13 57 -0.10 22 0 0 18 35 7 19 57 15.8 2 226 -56 18 7 10 19 3 6 18 0 46 19 9 31 -0.07 23 0 0 19 30 11 19 57 15.8 0 226 -57 19 2 19 .. .. .. 18 55 55 .. .. .. 0.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 7919-01335-1 * constellation : Corona Australis * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 46 23.9947 DE: -40 48 50.089 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 46 23.9947 DE: -40 48 50.089 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.4 * B mag [mag]: 11.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (907) Rhoda asteroid class: approx. diameter [km]: 73 approx. diameter ["]: 0.029 distance from Earth [AU]: 3.43150 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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): 0.008", 0.001", 96.283° remarks: * orbital elements for (907)Rhoda : Mean anomaly = 161.3880870128 deg Arg. of pericenter = 88.4594083474 deg Long. of node = 42.9196182688 deg Inclination = 19.5320943620 deg Eccentricity = 0.1640648086 Semimajor axis = 2.7992338881 AU Perihelion dist = 2.3399781162 AU Mag: H = 9.74, G = 0.15 Epoch of elements : MJD 60605.82861841 TDT (2024 Oct 22.8286) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,2.83,2024,10,22,19.886847,-0.045374,0.141301,13.948445,4.440985,0.005575,-0.000135,0.000000,0.000000 -48.0058,-40.7900,-122.22,-11.44,False TYC 7919-01335-1,18.77333191,-40.8139136,11.17,10.40,9.98,0.1,0,,18.80210237,-40.7899997,5.48,5.45,0,0,0 907,Rhoda,15.88,73.432,3.4315,0,0,3.148,11.38,,3.2,0 0,161.2137,2024,10,22,88.4594,42.9196,19.5321,0.16406,2.79923,2.33998,9.75,5.0,0.15 1.115,0.0077,0.0015,96,0.0034,Known errors,0.97,0,-1,-1 20241022_1335-1,60140.65 ------ 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