IOTA/IOTA-ES occultation update for (5344) Ryabov / UCAC4 537-025406 event on 2024 Apr 02, 18:57 UT Visible from Summary ------- On 2024 Apr 02 UT, the 11.052 km diameter asteroid (5344) Ryabov will occult a 11.2 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.24 mag to 18.47 mag (the magnitude of the asteroid) for at most 0.490 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: 90 * date and approx. time of event: 2024 Apr 02, 18:52 - 2024 Apr 02, 19:02 * geocentric midpoint of event [JD]: 2460403.29002171 * magnitude of target star: 11.23 * magnitude drop [mag]: 7.24 * estimated maximum duration [s]: 0.490 * Moon: 43 % sunlit, 160° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 90°) * approx speed of asteroid's shadow [km/s]: 22.6633 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 537-025406 by 5344 Ryabov on 2024 Apr 2 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 -108 0 0 - 1 15 25 18 52 57.7 1 73 81 - 1 18 34 - 1 12 15 - 1 21 50 - 1 8 59 .... -107 0 0 - 0 56 24 18 52 57.8 2 73 82 - 0 59 34 - 0 53 15 - 1 2 50 - 0 49 58 -0.13 -106 0 0 - 0 37 15 18 52 58.0 3 73 83 - 0 40 25 - 0 34 5 - 0 43 41 - 0 30 49 -0.12 -105 0 0 - 0 17 58 18 52 58.3 4 73 84 - 0 21 8 - 0 14 48 - 0 24 24 - 0 11 31 -0.12 -104 0 0 0 1 27 18 52 58.7 5 73 84 - 0 1 43 0 4 37 - 0 4 59 0 7 54 -0.11 -103 0 0 0 21 0 18 52 59.2 6 73 85 0 17 50 0 24 10 0 14 33 0 27 27 -0.11 -102 0 0 0 40 39 18 52 59.8 7 73 85 0 37 29 0 43 49 0 34 12 0 47 6 -0.11 -101 0 0 1 0 25 18 53 0.4 8 73 85 0 57 15 1 3 35 0 53 58 1 6 53 -0.11 -100 0 0 1 20 17 18 53 1.2 9 73 85 1 17 7 1 23 28 1 13 50 1 26 45 -0.11 - 99 0 0 1 40 15 18 53 2.1 10 73 85 1 37 5 1 43 26 1 33 47 1 46 43 -0.11 - 98 0 0 2 0 18 18 53 3.0 11 73 84 1 57 8 2 3 29 1 53 50 2 6 46 -0.11 - 97 0 0 2 20 26 18 53 4.1 12 73 84 2 17 15 2 23 37 2 13 58 2 26 54 -0.11 - 96 0 0 2 40 38 18 53 5.3 13 73 83 2 37 28 2 43 49 2 34 10 2 47 7 -0.11 - 95 0 0 3 0 54 18 53 6.5 14 73 82 2 57 44 3 4 5 2 54 26 3 7 23 -0.11 - 94 0 0 3 21 14 18 53 7.9 15 73 81 3 18 3 3 24 25 3 14 46 3 27 43 -0.10 - 93 0 0 3 41 37 18 53 9.3 16 73 80 3 38 26 3 44 47 3 35 8 3 48 5 -0.10 - 92 0 0 4 2 2 18 53 10.8 18 73 79 3 58 51 4 5 13 3 55 33 4 8 30 -0.10 - 91 0 0 4 22 29 18 53 12.4 19 73 79 4 19 18 4 25 40 4 16 0 4 28 58 -0.10 - 90 0 0 4 42 58 18 53 14.2 20 73 78 4 39 47 4 46 9 4 36 29 4 49 26 -0.10 - 89 0 0 5 3 27 18 53 16.0 21 73 77 5 0 16 5 6 38 4 56 59 5 9 56 -0.10 - 88 0 0 5 23 58 18 53 17.9 22 73 76 5 20 47 5 27 9 5 17 29 5 30 27 -0.10 - 87 0 0 5 44 29 18 53 19.8 23 74 75 5 41 18 5 47 40 5 38 0 5 50 58 -0.10 - 86 0 0 6 4 59 18 53 21.9 24 74 74 6 1 48 6 8 10 5 58 30 6 11 28 -0.10 - 85 0 0 6 25 29 18 53 24.1 25 74 73 6 22 18 6 28 40 6 19 0 6 31 58 -0.10 - 84 0 0 6 45 57 18 53 26.3 26 74 72 6 42 46 6 49 8 6 39 28 6 52 26 -0.10 - 83 0 0 7 6 24 18 53 28.7 27 74 70 7 3 13 7 9 35 6 59 55 7 12 52 -0.10 - 82 0 0 7 26 48 18 53 31.1 28 74 69 7 23 37 7 29 59 7 20 19 7 33 17 -0.10 - 81 0 0 7 47 10 18 53 33.6 29 74 68 7 43 59 7 50 21 7 40 41 7 53 39 -0.10 - 80 0 0 8 7 28 18 53 36.2 30 75 67 8 4 18 8 10 39 8 1 0 8 13 57 -0.10 - 79 0 0 8 27 43 18 53 38.8 31 75 66 8 24 33 8 30 54 8 21 15 8 34 12 -0.10 - 78 0 0 8 47 54 18 53 41.6 32 75 65 8 44 44 8 51 5 8 41 26 8 54 23 -0.10 - 77 0 0 9 8 1 18 53 44.4 33 75 64 9 4 50 9 11 12 9 1 33 9 14 29 -0.10 - 76 0 0 9 28 2 18 53 47.3 34 75 63 9 24 52 9 31 13 9 21 34 9 34 31 -0.10 - 75 0 0 9 47 58 18 53 50.3 35 76 62 9 44 48 9 51 9 9 41 31 9 54 26 -0.10 - 74 0 0 10 7 49 18 53 53.3 37 76 61 10 4 38 10 10 59 10 1 21 10 14 16 -0.10 - 73 0 0 10 27 32 18 53 56.4 38 76 60 10 24 22 10 30 43 10 21 5 10 34 0 -0.10 - 72 0 0 10 47 10 18 53 59.6 39 76 59 10 43 59 10 50 20 10 40 42 10 53 37 -0.10 - 71 0 0 11 6 40 18 54 2.9 40 77 58 11 3 29 11 9 50 11 0 12 11 13 7 -0.10 - 70 0 0 11 26 2 18 54 6.2 41 77 57 11 22 52 11 29 12 11 19 35 11 32 29 -0.10 - 69 0 0 11 45 16 18 54 9.6 42 77 56 11 42 6 11 48 26 11 38 49 11 51 43 -0.10 - 68 0 0 12 4 22 18 54 13.1 43 77 55 12 1 12 12 7 32 11 57 56 12 10 49 -0.10 - 67 0 0 12 23 19 18 54 16.6 44 78 54 12 20 9 12 26 29 12 16 53 12 29 45 -0.10 - 66 0 0 12 42 7 18 54 20.2 45 78 53 12 38 57 12 45 17 12 35 41 12 48 33 -0.10 - 65 0 0 13 0 45 18 54 23.8 46 78 52 12 57 36 13 3 55 12 54 19 13 7 11 -0.10 - 64 0 0 13 19 13 18 54 27.5 47 79 51 13 16 4 13 22 23 13 12 48 13 25 39 -0.10 - 63 0 0 13 37 31 18 54 31.3 48 79 50 13 34 22 13 40 40 13 31 6 13 43 56 -0.10 - 62 0 0 13 55 38 18 54 35.1 49 79 49 13 52 29 13 58 47 13 49 13 14 2 3 -0.10 - 61 0 0 14 13 34 18 54 38.9 50 80 48 14 10 25 14 16 43 14 7 9 14 19 58 -0.10 - 60 0 0 14 31 18 18 54 42.8 51 80 47 14 28 10 14 34 27 14 24 54 14 37 43 -0.10 - 59 0 0 14 48 51 18 54 46.8 52 81 46 14 45 43 14 52 0 14 42 27 14 55 15 -0.10 - 58 0 0 15 6 12 18 54 50.8 53 81 45 15 3 3 15 9 20 14 59 48 15 12 35 -0.10 - 57 0 0 15 23 20 18 54 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18 45 3 18 55 51.0 67 89 31 18 41 57 18 48 8 18 38 44 18 51 21 -0.10 - 43 0 0 18 58 48 18 55 55.5 68 90 30 18 55 42 19 1 53 18 52 30 19 5 6 -0.10 - 42 0 0 19 12 17 18 56 0.0 69 91 29 19 9 11 19 15 22 19 5 59 19 18 34 -0.10 - 41 0 0 19 25 29 18 56 4.6 70 92 28 19 22 24 19 28 34 19 19 12 19 31 46 -0.10 - 40 0 0 19 38 25 18 56 9.2 71 93 27 19 35 20 19 41 30 19 32 8 19 44 42 -0.10 - 39 0 0 19 51 4 18 56 13.7 72 94 26 19 47 59 19 54 9 19 44 48 19 57 21 -0.10 - 38 0 0 20 3 26 18 56 18.4 73 96 25 20 0 22 20 6 31 19 57 11 20 9 42 -0.10 - 37 0 0 20 15 32 18 56 23.0 74 97 24 20 12 27 20 18 36 20 9 16 20 21 47 -0.10 - 36 0 0 20 27 20 18 56 27.6 74 99 23 20 24 15 20 30 24 20 21 5 20 33 35 -0.10 - 35 0 0 20 38 50 18 56 32.2 75 100 22 20 35 46 20 41 55 20 32 36 20 45 5 -0.10 - 34 0 0 20 50 4 18 56 36.9 76 102 21 20 47 0 20 53 8 20 43 49 20 56 18 -0.10 - 33 0 0 21 0 59 18 56 41.6 77 104 20 20 57 56 21 4 3 20 54 45 21 7 14 -0.10 - 32 0 0 21 11 37 18 56 46.2 78 106 19 21 8 34 21 14 41 21 5 24 21 17 51 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35 23 8 24 23 20 43 -0.10 21 0 0 23 8 32 19 0 35.5 50 270 -30 23 5 31 23 11 34 23 2 23 23 14 42 -0.10 22 0 0 23 2 13 19 0 39.1 49 270 -30 22 59 11 23 5 15 22 56 3 23 8 23 -0.10 23 0 0 22 55 35 19 0 42.6 48 271 -31 22 52 33 22 58 37 22 49 25 23 1 45 -0.10 24 0 0 22 48 39 19 0 46.0 47 271 -32 22 45 37 22 51 41 22 42 29 22 54 49 -0.10 25 0 0 22 41 24 19 0 49.4 47 272 -33 22 38 22 22 44 26 22 35 14 22 47 35 -0.10 26 0 0 22 33 51 19 0 52.8 46 272 -34 22 30 49 22 36 53 22 27 40 22 40 2 -0.10 27 0 0 22 26 0 19 0 56.1 45 273 -35 22 22 57 22 29 2 22 19 49 22 32 11 -0.10 28 0 0 22 17 50 19 0 59.4 44 273 -36 22 14 48 22 20 53 22 11 39 22 24 2 -0.10 29 0 0 22 9 22 19 1 2.6 43 274 -37 22 6 20 22 12 25 22 3 11 22 15 34 -0.10 30 0 0 22 0 37 19 1 5.7 42 274 -38 21 57 34 22 3 40 21 54 25 22 6 49 -0.10 31 0 0 21 51 33 19 1 8.8 41 275 -39 21 48 30 21 54 36 21 45 21 21 57 46 -0.10 32 0 0 21 42 12 19 1 11.9 40 275 -40 21 39 9 21 45 15 21 35 59 21 48 24 -0.10 33 0 0 21 32 32 19 1 14.9 39 275 -40 21 29 29 21 35 36 21 26 19 21 38 45 -0.10 34 0 0 21 22 35 19 1 17.8 38 276 -41 21 19 32 21 25 39 21 16 22 21 28 49 -0.10 35 0 0 21 12 21 19 1 20.7 37 276 -42 21 9 17 21 15 25 21 6 7 21 18 35 -0.10 36 0 0 21 1 49 19 1 23.5 36 277 -43 20 58 45 21 4 53 20 55 35 21 8 3 -0.10 37 0 0 20 51 0 19 1 26.3 35 277 -44 20 47 56 20 54 4 20 44 46 20 57 14 -0.10 38 0 0 20 39 54 19 1 29.0 34 277 -45 20 36 50 20 42 58 20 33 39 20 46 8 -0.10 39 0 0 20 28 30 19 1 31.7 33 278 -46 20 25 26 20 31 35 20 22 15 20 34 45 -0.10 40 0 0 20 16 50 19 1 34.3 32 278 -47 20 13 45 20 19 54 20 10 34 20 23 5 -0.10 41 0 0 20 4 53 19 1 36.8 31 279 -48 20 1 48 20 7 58 19 58 37 20 11 9 -0.10 42 0 0 19 52 39 19 1 39.2 30 279 -49 19 49 34 19 55 44 19 46 23 19 58 55 -0.10 43 0 0 19 40 9 19 1 41.6 29 279 -50 19 37 4 19 43 14 19 33 53 19 46 26 -0.10 44 0 0 19 27 23 19 1 43.9 28 280 -50 19 24 17 19 30 28 19 21 6 19 33 40 -0.10 45 0 0 19 14 20 19 1 46.2 27 280 -51 19 11 15 19 17 25 19 8 3 19 20 37 -0.10 46 0 0 19 1 2 19 1 48.4 26 280 -52 18 57 56 19 4 7 18 54 44 19 7 19 -0.10 47 0 0 18 47 27 19 1 50.5 25 281 -53 18 44 22 18 50 33 18 41 9 18 53 46 -0.10 48 0 0 18 33 38 19 1 52.6 24 281 -54 18 30 32 18 36 44 18 27 19 18 39 56 -0.10 49 0 0 18 19 32 19 1 54.5 23 281 -55 18 16 26 18 22 39 18 13 14 18 25 51 -0.10 50 0 0 18 5 12 19 1 56.4 22 282 -56 18 2 6 18 8 18 17 58 53 18 11 31 -0.10 51 0 0 17 50 37 19 1 58.3 22 282 -57 17 47 30 17 53 43 17 44 17 17 56 56 -0.11 52 0 0 17 35 47 19 2 0.0 21 282 -58 17 32 40 17 38 53 17 29 27 17 42 7 -0.11 53 0 0 17 20 42 19 2 1.7 20 283 -58 17 17 35 17 23 49 17 14 22 17 27 3 -0.11 54 0 0 17 5 23 19 2 3.3 19 283 -59 17 2 16 17 8 30 16 59 3 17 11 44 -0.11 55 0 0 16 49 51 19 2 4.8 18 283 -60 16 46 44 16 52 58 16 43 30 16 56 12 -0.11 56 0 0 16 34 4 19 2 6.3 17 284 -61 16 30 57 16 37 12 16 27 43 16 40 26 -0.11 57 0 0 16 18 4 19 2 7.6 16 284 -62 16 14 57 16 21 12 16 11 42 16 24 26 -0.11 58 0 0 16 1 51 19 2 8.9 15 284 -63 15 58 43 16 4 59 15 55 29 16 8 13 -0.11 59 0 0 15 45 25 19 2 10.1 14 285 -63 15 42 17 15 48 33 15 39 2 15 51 47 -0.11 60 0 0 15 28 46 19 2 11.3 13 285 -64 15 25 38 15 31 54 15 22 23 15 35 9 -0.11 61 0 0 15 11 55 19 2 12.3 12 285 -65 15 8 47 15 15 3 15 5 32 15 18 18 -0.11 62 0 0 14 54 51 19 2 13.2 11 285 -66 14 51 43 14 58 0 14 48 28 15 1 15 -0.11 63 0 0 14 37 36 19 2 14.1 9 286 -67 14 34 28 14 40 45 14 31 13 14 44 0 -0.12 64 0 0 14 20 10 19 2 14.9 8 286 -67 14 17 1 14 23 19 14 13 46 14 26 34 -0.12 65 0 0 14 2 32 19 2 15.6 7 286 -68 13 59 24 14 5 41 13 56 8 14 8 57 -0.12 66 0 0 13 44 44 19 2 16.2 6 286 -69 13 41 35 13 47 53 13 38 19 13 51 9 -0.12 67 0 0 13 26 45 19 2 16.7 5 287 -70 13 23 36 13 29 54 13 20 20 13 33 10 -0.13 68 0 0 13 8 36 19 2 17.2 4 287 -70 13 5 27 13 11 46 13 2 11 13 15 2 -0.14 69 0 0 12 50 18 19 2 17.5 3 287 -71 12 47 8 12 53 27 12 43 52 12 56 43 -0.15 70 0 0 12 31 50 19 2 17.8 2 287 -71 12 28 40 12 34 59 12 25 24 12 38 15 -0.17 71 0 0 12 13 13 19 2 17.9 1 287 -72 12 10 3 12 16 22 12 6 47 12 19 39 -0.22 72 0 0 11 54 27 19 2 18.0 0 288 -73 11 51 17 11 57 37 11 48 1 12 0 53 -0.63 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 537-025406 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 21 42.1302 DE: +17 20 02.088 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 21 42.1300 DE: +17 20 02.088 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5344) Ryabov asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.46060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Feb 10 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", 90.4° remarks: * orbital elements for (5344)Ryabov : Mean anomaly = 58.0101692267 deg Arg. of pericenter = 228.5887789753 deg Long. of node = 173.8575249319 deg Inclination = 7.0964566032 deg Eccentricity = 0.1655289042 Semimajor axis = 2.7015489119 AU Perihelion dist = 2.2543644809 AU Mag: H = 13.41, G = 0.15 Epoch of elements : MJD 60402.79002151 TDT (2024 Apr 02.7900) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Feb10,0.49,2024,4,2,18.960521,-0.011297,0.093342,12.699005,1.538088,0.005601,-0.000301,0.000000,0.000000 -20.2413,17.3228,-103.57,5.34,False UCAC4 537-025406,6.36170285,17.3339134,11.53,11.23,11.07,0.0,4,K,6.38507285,17.3227632,7.24,6.96,0,0,0 5344,Ryabov,18.47,11.052,2.4606,0,0,3.170,5.50,,2.0,0 0,57.8348,2024,4,2,228.5888,173.8575,7.0965,0.16553,2.70155,2.25436,13.41,5.0,0.15 1.518,0.0143,0.0027,90,0.0032,Known errors,1.14,0,-1,-1 20240402_025406,60139.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org