IOTA/IOTA-ES occultation update for (2477) Biryukov / TYC 255-00818-1 event on 2024 Nov 04, 19:20 UT Visible from Summary ------- On 2024 Nov 04 UT, the 18.8110249718221 km diameter asteroid (2477) Biryukov will occult a 10.2 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.14 mag to 18.35 mag (the magnitude of the asteroid) for at most 0.600 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 Nov 04, 19:17 - 2024 Nov 04, 19:23 * geocentric midpoint of event [JD]: 2460619.30593846 * magnitude of target star: 10.21 * magnitude drop [mag]: 8.14 * estimated maximum duration [s]: 0.600 * Moon: 10 % sunlit, 93° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.001", 109°) * approx speed of asteroid's shadow [km/s]: 31.9242 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 255-00818-1 by 2477 Biryukov on 2024 Nov 4 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 101 0 0 0 10 53 19 17 30.3 0 89 -53 0 5 14 0 16 32 0 3 22 0 18 24 .... 102 0 0 0 12 8 19 17 30.4 1 89 -52 0 6 29 0 17 47 0 4 38 0 19 39 0.24 103 0 0 0 12 55 19 17 30.5 2 89 -51 0 7 16 0 18 34 0 5 25 0 20 25 0.34 104 0 0 0 13 14 19 17 30.7 3 89 -50 0 7 35 0 18 53 0 5 43 0 20 44 0.37 105 0 0 0 13 4 19 17 30.9 4 89 -49 0 7 25 0 18 43 0 5 33 0 20 34 0.39 106 0 0 0 12 26 19 17 31.2 5 89 -48 0 6 47 0 18 5 0 4 55 0 19 56 0.40 107 0 0 0 11 20 19 17 31.6 6 89 -47 0 5 40 0 16 59 0 3 49 0 18 50 0.41 108 0 0 0 9 45 19 17 32.0 7 89 -46 0 4 6 0 15 24 0 2 14 0 17 16 0.41 109 0 0 0 7 42 19 17 32.5 8 89 -45 0 2 2 0 13 21 0 0 11 0 15 13 0.42 110 0 0 0 5 11 19 17 33.1 9 89 -44 - 0 0 29 0 10 50 - 0 2 21 0 12 41 0.42 111 0 0 0 2 11 19 17 33.8 10 89 -43 - 0 3 29 0 7 50 - 0 5 21 0 9 42 0.42 112 0 0 - 0 1 17 19 17 34.5 11 88 -42 - 0 6 57 0 4 22 - 0 8 49 0 6 14 0.43 113 0 0 - 0 5 14 19 17 35.2 12 88 -41 - 0 10 54 0 0 26 - 0 12 46 0 2 17 0.43 114 0 0 - 0 9 39 19 17 36.1 13 88 -41 - 0 15 19 - 0 3 59 - 0 17 11 - 0 2 7 0.43 115 0 0 - 0 14 32 19 17 37.0 14 88 -40 - 0 20 13 - 0 8 52 - 0 22 5 - 0 7 0 0.43 116 0 0 - 0 19 54 19 17 38.0 15 88 -39 - 0 25 35 - 0 14 13 - 0 27 27 - 0 12 22 0.43 117 0 0 - 0 25 44 19 17 39.0 16 88 -38 - 0 31 25 - 0 20 3 - 0 33 17 - 0 18 11 0.43 118 0 0 - 0 32 2 19 17 40.1 17 88 -37 - 0 37 44 - 0 26 21 - 0 39 36 - 0 24 29 0.43 119 0 0 - 0 38 49 19 17 41.3 18 88 -36 - 0 44 31 - 0 33 8 - 0 46 23 - 0 31 15 0.43 120 0 0 - 0 46 4 19 17 42.5 19 88 -35 - 0 51 46 - 0 40 22 - 0 53 38 - 0 38 30 0.44 121 0 0 - 0 53 47 19 17 43.8 20 88 -34 - 0 59 29 - 0 48 5 - 1 1 22 - 0 46 12 0.44 122 0 0 - 1 1 58 19 17 45.2 21 88 -33 - 1 7 41 - 0 56 15 - 1 9 33 - 0 54 23 0.44 123 0 0 - 1 10 37 19 17 46.6 22 88 -32 - 1 16 20 - 1 4 54 - 1 18 13 - 1 3 2 0.44 124 0 0 - 1 19 45 19 17 48.1 23 88 -31 - 1 25 28 - 1 14 1 - 1 27 21 - 1 12 9 0.44 125 0 0 - 1 29 20 19 17 49.7 24 88 -30 - 1 35 4 - 1 23 36 - 1 36 57 - 1 21 43 0.44 126 0 0 - 1 39 23 19 17 51.3 25 88 -29 - 1 45 8 - 1 33 39 - 1 47 1 - 1 31 46 0.44 127 0 0 - 1 49 54 19 17 53.0 26 87 -28 - 1 55 39 - 1 44 9 - 1 57 32 - 1 42 16 0.44 128 0 0 - 2 0 53 19 17 54.7 27 87 -27 - 2 6 38 - 1 55 8 - 2 8 32 - 1 53 14 0.44 129 0 0 - 2 12 19 19 17 56.5 28 87 -26 - 2 18 5 - 2 6 34 - 2 19 59 - 2 4 40 0.44 130 0 0 - 2 24 13 19 17 58.4 29 87 -25 - 2 30 0 - 2 18 27 - 2 31 53 - 2 16 33 0.44 131 0 0 - 2 36 34 19 18 0.4 30 87 -24 - 2 42 21 - 2 30 48 - 2 44 15 - 2 28 54 0.44 132 0 0 - 2 49 23 19 18 2.4 31 87 -23 - 2 55 11 - 2 43 36 - 2 57 5 - 2 41 42 0.44 133 0 0 - 3 2 39 19 18 4.4 32 86 -22 - 3 8 27 - 2 56 51 - 3 10 21 - 2 54 57 0.44 134 0 0 - 3 16 22 19 18 6.6 33 86 -21 - 3 22 10 - 3 10 33 - 3 24 5 - 3 8 39 0.44 135 0 0 - 3 30 31 19 18 8.7 34 86 -19 - 3 36 21 - 3 24 43 - 3 38 15 - 3 22 48 0.44 136 0 0 - 3 45 8 19 18 11.0 35 86 -18 - 3 50 58 - 3 39 18 - 3 52 52 - 3 37 24 0.44 137 0 0 - 4 0 11 19 18 13.3 36 85 -17 - 4 6 1 - 3 54 21 - 4 7 56 - 3 52 26 0.44 138 0 0 - 4 15 40 19 18 15.6 37 85 -16 - 4 21 31 - 4 9 49 - 4 23 26 - 4 7 54 0.44 139 0 0 - 4 31 36 19 18 18.1 38 85 -15 - 4 37 27 - 4 25 44 - 4 39 23 - 4 23 49 0.44 140 0 0 - 4 47 57 19 18 20.5 39 84 -14 - 4 53 49 - 4 42 5 - 4 55 45 - 4 40 9 0.44 141 0 0 - 5 4 44 19 18 23.1 40 84 -13 - 5 10 37 - 4 58 51 - 5 12 33 - 4 56 56 0.44 142 0 0 - 5 21 57 19 18 25.7 41 83 -12 - 5 27 50 - 5 16 3 - 5 29 47 - 5 14 7 0.44 143 0 0 - 5 39 35 19 18 28.3 42 83 -11 - 5 45 29 - 5 33 40 - 5 47 25 - 5 31 44 0.44 144 0 0 - 5 57 37 19 18 31.0 43 82 -10 - 6 3 32 - 5 51 43 - 6 5 29 - 5 49 46 0.44 145 0 0 - 6 16 5 19 18 33.8 44 82 -9 - 6 22 1 - 6 10 9 - 6 23 57 - 6 8 13 0.44 146 0 0 - 6 34 57 19 18 36.6 45 81 -8 - 6 40 53 - 6 29 1 - 6 42 50 - 6 27 4 0.44 147 0 0 - 6 54 13 19 18 39.4 46 81 -7 - 7 0 10 - 6 48 16 - 7 2 7 - 6 46 19 0.44 148 0 0 - 7 13 53 19 18 42.3 47 80 -6 - 7 19 50 - 7 7 55 - 7 21 48 - 7 5 58 0.44 149 0 0 - 7 33 56 19 18 45.3 48 79 -5 - 7 39 54 - 7 27 57 - 7 41 52 - 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29 41 0.45 -101 0 0 -46 45 0 19 23 29.9 13 286 57 -46 50 44 -46 39 17 -46 52 37 -46 37 24 0.45 -100 0 0 -46 52 23 19 23 30.5 12 285 56 -46 58 6 -46 46 40 -46 59 59 -46 44 48 0.45 - 99 0 0 -46 59 26 19 23 31.0 11 285 56 -47 5 9 -46 53 44 -47 7 1 -46 51 51 0.45 - 98 0 0 -47 6 9 19 23 31.5 11 284 56 -47 11 51 -47 0 27 -47 13 44 -46 58 35 0.45 - 97 0 0 -47 12 33 19 23 32.0 10 283 55 -47 18 15 -47 6 52 -47 20 7 -47 5 0 0.45 - 96 0 0 -47 18 37 19 23 32.4 9 282 55 -47 24 19 -47 12 56 -47 26 11 -47 11 4 0.45 - 95 0 0 -47 24 22 19 23 32.9 9 282 54 -47 30 3 -47 18 41 -47 31 55 -47 16 49 0.45 - 94 0 0 -47 29 47 19 23 33.2 8 281 54 -47 35 28 -47 24 7 -47 37 20 -47 22 15 0.46 - 93 0 0 -47 34 53 19 23 33.6 7 280 53 -47 40 34 -47 29 13 -47 42 25 -47 27 22 0.46 - 92 0 0 -47 39 40 19 23 33.9 7 279 53 -47 45 20 -47 34 0 -47 47 12 -47 32 9 0.46 - 91 0 0 -47 44 8 19 23 34.2 6 279 52 -47 49 47 -47 38 28 -47 51 39 -47 36 37 0.46 - 90 0 0 -47 48 16 19 23 34.4 5 278 52 -47 53 55 -47 42 37 -47 55 47 -47 40 45 0.46 - 89 0 0 -47 52 5 19 23 34.6 4 277 51 -47 57 44 -47 46 26 -47 59 36 -47 44 35 0.47 - 88 0 0 -47 55 35 19 23 34.8 4 276 51 -48 1 14 -47 49 56 -48 3 6 -47 48 5 0.47 - 87 0 0 -47 58 46 19 23 35.0 3 276 50 -48 4 25 -47 53 8 -48 6 16 -47 51 17 0.48 - 86 0 0 -48 1 38 19 23 35.1 2 275 50 -48 7 17 -47 56 0 -48 9 8 -47 54 9 0.49 - 85 0 0 -48 4 11 19 23 35.2 2 274 49 -48 9 50 -47 58 33 -48 11 41 -47 56 42 0.51 - 84 0 0 -48 6 26 19 23 35.2 1 273 49 -48 12 4 -48 0 48 -48 13 55 -47 58 57 0.56 - 83 0 0 -48 8 21 19 23 35.3 0 273 48 -48 13 59 -48 2 43 -48 15 50 -48 0 52 0.74 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 255-00818-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 57 42.9959 DE: +01 36 40.331 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 57 42.9960 DE: +01 36 40.331 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.2 * B mag [mag]: 10.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2477) Biryukov asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.26740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.008", 0.001", 108.653° remarks: * orbital elements for (2477)Biryukov : Mean anomaly = 223.8256156710 deg Arg. of pericenter = 86.3901190793 deg Long. of node = 208.1729822489 deg Inclination = 6.1060343523 deg Eccentricity = 0.1522264140 Semimajor axis = 2.5565221287 AU Perihelion dist = 2.1673519329 AU Mag: H = 12.59, G = 0.15 Epoch of elements : MJD 60618.80593854 TDT (2024 Nov 04.8059) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr27,0.60,2024,11,4,19.342523,-0.164674,-0.369854,16.453590,-7.345746,-0.004697,0.001686,-0.000001,0.000000 -169.9183,1.4804,-114.24,-15.70,False TYC 255-00818-1,10.96194327,1.6112033,10.69,10.21,9.95,0.1,0,,10.98300936,1.4803670,8.14,7.95,0,0,0 2477,Biryukov,18.35,19.048,3.2674,0,0,2.954,-19.78,,1.2,0 0,223.6313,2024,11,4,86.3901,208.1730,6.1060,0.15223,2.55652,2.16735,12.59,5.0,0.15 1.164,0.0083,0.0011,109,0.0013,Known errors,1.04,0,-1,-1 20241104_0818-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org