IOTA/IOTA-ES occultation update for (223) Rosa / UCAC4 364-067890 event on 2024 Feb 19, 15:03 UT Visible from Summary ------- On 2024 Feb 19 UT, the 80.7690639892008 km diameter asteroid (223) Rosa will occult a 10.2 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.36 mag to 15.53 mag (the magnitude of the asteroid) for at most 7.800 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 Feb 19, 14:52 - 2024 Feb 19, 15:13 * geocentric midpoint of event [JD]: 2460360.12721200 * magnitude of target star: 10.18 * magnitude drop [mag]: 5.36 * estimated maximum duration [s]: 7.800 * Moon: 80 % sunlit, 134° distance * Sun: 100° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.010", 108°) * approx speed of asteroid's shadow [km/s]: 10.5942 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 364-067890 by 223 Rosa on 2024 Feb 19 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 11 24 44 14 53 11.4 0 108 -80 11 1 5 .. .. .. 10 49 30 .. .. .. .... 131 0 0 11 5 31 14 53 11.5 1 108 -81 10 41 49 11 29 11 10 30 13 11 40 46 0.15 132 0 0 10 45 56 14 53 11.8 2 108 -82 10 22 12 11 9 39 10 10 35 11 21 15 0.13 133 0 0 10 26 0 14 53 12.3 3 108 -83 10 2 14 10 49 45 9 50 35 11 1 23 0.12 134 0 0 10 5 43 14 53 13.0 4 109 -84 9 41 54 10 29 31 9 30 14 10 41 9 0.12 135 0 0 9 45 5 14 53 13.9 5 109 -85 9 21 13 10 8 55 9 9 32 10 20 34 0.11 136 0 0 9 24 6 14 53 15.1 6 109 -85 9 0 12 9 47 59 8 48 30 9 59 39 0.11 137 0 0 9 2 47 14 53 16.4 7 109 -86 8 38 50 9 26 42 8 27 7 9 38 24 0.11 138 0 0 8 41 8 14 53 17.9 8 109 -87 8 17 9 9 5 5 8 5 24 9 16 48 0.11 139 0 0 8 19 9 14 53 19.7 10 109 -87 7 55 8 8 43 9 7 43 22 8 54 53 0.11 140 0 0 7 56 51 14 53 21.6 11 109 -87 7 32 47 8 20 53 7 21 0 8 32 39 0.11 141 0 0 7 34 13 14 53 23.8 12 110 -86 7 10 7 7 58 18 6 58 19 8 10 5 0.11 142 0 0 7 11 17 14 53 26.2 13 110 -85 6 47 9 7 35 25 6 35 20 7 47 12 0.11 143 0 0 6 48 3 14 53 28.8 14 110 -85 6 23 52 7 12 13 6 12 2 7 24 2 0.11 144 0 0 6 24 31 14 53 31.6 15 110 -84 6 0 18 6 48 43 5 48 26 7 0 33 0.11 145 0 0 6 0 41 14 53 34.6 16 110 -83 5 36 26 6 24 56 5 24 33 6 36 47 0.11 146 0 0 5 36 35 14 53 37.9 17 110 -82 5 12 17 6 0 51 5 0 23 6 12 43 0.11 147 0 0 5 12 11 14 53 41.3 18 110 -81 4 47 52 5 36 30 4 35 57 5 48 23 0.11 148 0 0 4 47 32 14 53 45.0 19 110 -80 4 23 10 5 11 53 4 11 14 5 23 47 0.11 149 0 0 4 22 37 14 53 48.9 20 110 -79 3 58 13 4 47 0 3 46 16 4 58 56 0.11 150 0 0 3 57 27 14 53 53.0 21 110 -78 3 33 1 4 21 52 3 21 3 4 33 49 0.11 151 0 0 3 32 3 14 53 57.4 23 111 -77 3 7 35 3 56 30 2 55 36 4 8 27 0.11 152 0 0 3 6 24 14 54 1.9 24 111 -76 2 41 54 3 30 53 2 29 55 3 42 51 0.11 153 0 0 2 40 32 14 54 6.7 25 111 -74 2 16 1 3 5 3 2 4 0 3 17 2 0.11 154 0 0 2 14 28 14 54 11.7 26 111 -73 1 49 54 2 39 0 1 37 53 2 51 0 0.11 155 0 0 1 48 11 14 54 16.9 27 111 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60 -26 31 26 -25 45 25 -26 42 42 -25 34 10 0.10 - 71 0 0 -25 56 18 15 12 39.8 18 259 61 -26 19 20 -25 33 15 -26 30 37 -25 21 59 0.10 - 70 0 0 -25 43 47 15 12 42.9 17 259 62 -26 6 52 -25 20 43 -26 18 10 -25 9 26 0.10 - 69 0 0 -25 30 55 15 12 45.8 16 258 63 -25 54 2 -25 7 48 -26 5 21 -24 56 30 0.10 - 68 0 0 -25 17 40 15 12 48.5 16 258 64 -25 40 49 -24 54 31 -25 52 9 -24 43 12 0.10 - 67 0 0 -25 4 2 15 12 51.1 15 257 65 -25 27 14 -24 40 52 -25 38 35 -24 29 32 0.10 - 66 0 0 -24 50 3 15 12 53.5 14 257 66 -25 13 16 -24 26 50 -25 24 38 -24 15 29 0.11 - 65 0 0 -24 35 41 15 12 55.8 13 256 67 -24 58 57 -24 12 26 -25 10 20 -24 1 4 0.11 - 64 0 0 -24 20 58 15 12 57.9 12 256 68 -24 44 16 -23 57 41 -24 55 40 -23 46 17 0.11 - 63 0 0 -24 5 52 15 12 59.9 11 256 68 -24 29 12 -23 42 33 -24 40 38 -23 31 9 0.11 - 62 0 0 -23 50 25 15 13 1.7 10 255 69 -24 13 48 -23 27 4 -24 25 14 -23 15 38 0.11 - 61 0 0 -23 34 37 15 13 3.4 9 255 70 -23 58 1 -23 11 13 -24 9 29 -22 59 46 0.11 - 60 0 0 -23 18 27 15 13 4.8 8 254 71 -23 41 54 -22 55 1 -23 53 23 -22 43 33 0.12 - 59 0 0 -23 1 56 15 13 6.2 7 254 72 -23 25 25 -22 38 28 -23 36 55 -22 26 59 0.12 - 58 0 0 -22 45 4 15 13 7.3 6 254 73 -23 8 36 -22 21 34 -23 20 7 -22 10 4 0.12 - 57 0 0 -22 27 51 15 13 8.3 5 253 74 -22 51 25 -22 4 19 -23 2 57 -21 52 48 0.13 - 56 0 0 -22 10 18 15 13 9.1 4 253 75 -22 33 54 -21 46 43 -22 45 28 -21 35 11 0.14 - 55 0 0 -21 52 25 15 13 9.8 3 252 76 -22 16 3 -21 28 47 -22 27 38 -21 17 14 0.15 - 54 0 0 -21 34 11 15 13 10.2 2 252 76 -21 57 52 -21 10 31 -22 9 27 -20 58 57 0.18 - 53 0 0 -21 15 37 15 13 10.5 1 252 77 -21 39 20 -20 51 56 -21 50 57 -20 40 20 0.25 - 52 0 0 -20 56 44 15 13 10.6 0 251 78 -21 20 29 .. .. .. -21 32 7 .. .. .. 1.71 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 364-067890 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 13 07.9481 DE: -17 20 47.374 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 13 07.9481 DE: -17 20 47.374 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 10.2 * B mag [mag]: 12.3 * Diameter [mas]: 0.90 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (223) Rosa asteroid class: approx. diameter [km]: 81 approx. diameter ["]: 0.040 distance from Earth [AU]: 2.78660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#69 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): 0.019", 0.010", 107.55° remarks: * orbital elements for (223)Rosa : Mean anomaly = 85.4499356515 deg Arg. of pericenter = 65.5053108397 deg Long. of node = 47.5410594763 deg Inclination = 1.9236300240 deg Eccentricity = 0.1203686335 Semimajor axis = 3.0924624373 AU Perihelion dist = 2.7202269597 AU Mag: H = 9.90, G = 0.15 Epoch of elements : MJD 60359.62721216 TDT (2024 Feb 19.6272) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#692023Apr24,7.80,2024,2,19,15.053088,-0.024884,-0.082660,5.721971,-1.736484,-0.005659,0.001529,0.000000,0.000000 -146.2398,-17.4374,-42.33,-11.31,False UCAC4 364-067890,15.21887444,-17.3464928,12.26,10.18,9.06,0.9,4,,15.24154103,-17.4374487,5.36,6.03,0,0,0 223,Rosa,15.53,82.588,2.7866,0,0,1.262,-5.48,,4.6,0 0,85.3363,2024,2,19,65.5053,47.5411,1.9236,0.12037,3.09246,2.72023,9.90,5.0,0.15 1.245,0.0193,0.0100,108,0.0100,Known errors,1.50,0,-1,-1 20240219_067890,60138.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 04:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org