IOTA/IOTA-ES occultation update for (2657) Bashkiria / HIP 110375 event on 2024 Dec 15, 11:19 UT Visible from Summary ------- On 2024 Dec 15 UT, the 21.2066833585895 km diameter asteroid (2657) Bashkiria will occult a 8.5 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.57 mag to 18.07 mag (the magnitude of the asteroid) for at most 0.810 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 Dec 15, 11:15 - 2024 Dec 15, 11:23 * geocentric midpoint of event [JD]: 2460659.97206495 * magnitude of target star: 8.50 * magnitude drop [mag]: 9.57 * estimated maximum duration [s]: 0.810 * Moon: 100 % sunlit, 112° distance * Sun: 69° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 68°) * approx speed of asteroid's shadow [km/s]: 27.0202 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 110375 by 2657 Bashkiria on 2024 Dec 15 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 - 10 0 0 -11 33 32 11 15 55.5 0 102 68 -11 39 44 -11 27 20 -11 41 13 -11 25 50 .... - 9 0 0 -11 46 3 11 15 55.6 1 102 69 -11 52 14 -11 39 51 -11 53 43 -11 38 22 -0.08 - 8 0 0 -11 58 6 11 15 55.7 2 102 70 -12 4 17 -11 51 55 -12 5 46 -11 50 26 -0.13 - 7 0 0 -12 9 43 11 15 55.9 3 102 70 -12 15 53 -12 3 33 -12 17 22 -12 2 3 -0.16 - 6 0 0 -12 20 52 11 15 56.2 4 101 71 -12 27 2 -12 14 42 -12 28 31 -12 13 13 -0.17 - 5 0 0 -12 31 35 11 15 56.6 5 101 72 -12 37 44 -12 25 25 -12 39 13 -12 23 56 -0.18 - 4 0 0 -12 41 49 11 15 57.0 6 101 73 -12 47 58 -12 35 40 -12 49 27 -12 34 12 -0.18 - 3 0 0 -12 51 37 11 15 57.5 7 101 74 -12 57 45 -12 45 28 -12 59 14 -12 44 0 -0.19 - 2 0 0 -13 0 57 11 15 58.1 8 101 75 -13 7 5 -12 54 49 -13 8 33 -12 53 20 -0.19 - 1 0 0 -13 9 49 11 15 58.7 9 100 75 -13 15 57 -13 3 41 -13 17 25 -13 2 13 -0.19 0 0 0 -13 18 14 11 15 59.4 10 100 76 -13 24 21 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35.6 60 222 -7 10 37 19 10 50 57 10 35 40 10 52 35 -0.21 102 0 0 11 14 37 11 21 39.6 59 223 -8 11 7 48 11 21 27 11 6 10 11 23 5 -0.21 103 0 0 11 45 6 11 21 43.6 57 224 -9 11 38 17 11 51 55 11 36 38 11 53 34 -0.21 104 0 0 12 15 33 11 21 47.5 56 225 -10 12 8 44 12 22 23 12 7 6 12 24 1 -0.21 105 0 0 12 45 58 11 21 51.4 55 225 -11 12 39 9 12 52 48 12 37 31 12 54 26 -0.21 106 0 0 13 16 20 11 21 55.2 54 226 -12 13 9 31 13 23 10 13 7 52 13 24 48 -0.21 107 0 0 13 46 38 11 21 59.0 53 227 -13 13 39 48 13 53 27 13 38 10 13 55 6 -0.21 108 0 0 14 16 50 11 22 2.7 52 227 -14 14 10 1 14 23 40 14 8 23 14 25 18 -0.21 109 0 0 14 46 57 11 22 6.3 51 228 -15 14 40 8 14 53 46 14 38 30 14 55 25 -0.21 110 0 0 15 16 57 11 22 9.9 50 229 -16 15 10 9 15 23 46 15 8 30 15 25 25 -0.21 111 0 0 15 46 50 11 22 13.4 49 229 -18 15 40 1 15 53 39 15 38 23 15 55 17 -0.20 112 0 0 16 16 34 11 22 16.9 48 230 -19 16 9 46 16 23 23 16 8 8 16 25 1 -0.20 113 0 0 16 46 10 11 22 20.2 47 230 -20 16 39 21 16 52 58 16 37 43 16 54 36 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44 51 22 58 15 22 43 14 22 59 52 -0.20 127 0 0 23 17 48 11 22 59.8 32 237 -34 23 11 7 23 24 30 23 9 30 23 26 7 -0.20 128 0 0 23 43 45 11 23 2.1 31 238 -35 23 37 4 23 50 26 23 35 28 23 52 2 -0.20 129 0 0 24 9 23 11 23 4.3 30 238 -36 24 2 42 24 16 3 24 1 6 24 17 39 -0.20 130 0 0 24 34 41 11 23 6.4 29 239 -37 24 28 1 24 41 20 24 26 25 24 42 57 -0.20 131 0 0 24 59 39 11 23 8.4 28 239 -38 24 53 0 25 6 18 24 51 24 25 7 54 -0.20 132 0 0 25 24 17 11 23 10.4 27 240 -39 25 17 39 25 30 55 25 16 3 25 32 31 -0.20 133 0 0 25 48 34 11 23 12.3 26 240 -40 25 41 57 25 55 12 25 40 21 25 56 47 -0.20 134 0 0 26 12 31 11 23 14.1 25 241 -41 26 5 54 26 19 8 26 4 19 26 20 43 -0.20 135 0 0 26 36 6 11 23 15.8 24 241 -42 26 29 30 26 42 42 26 27 55 26 44 17 -0.20 136 0 0 26 59 19 11 23 17.5 23 242 -43 26 52 44 27 5 55 26 51 9 27 7 30 -0.20 137 0 0 27 22 11 11 23 19.1 22 242 -44 27 15 37 27 28 46 27 14 2 27 30 21 -0.20 138 0 0 27 44 41 11 23 20.6 21 243 -45 27 38 7 27 51 14 27 36 33 27 52 49 -0.20 139 0 0 28 6 48 11 23 22.0 20 243 -46 28 0 15 28 13 21 27 58 41 28 14 55 -0.20 140 0 0 28 28 33 11 23 23.4 20 244 -47 28 22 1 28 35 5 28 20 27 28 36 39 -0.20 141 0 0 28 49 55 11 23 24.7 19 244 -48 28 43 24 28 56 26 28 41 50 28 58 0 -0.20 142 0 0 29 10 54 11 23 25.9 18 245 -49 29 4 24 29 17 24 29 2 50 29 18 58 -0.20 143 0 0 29 31 30 11 23 27.1 17 245 -49 29 25 0 29 38 0 29 23 27 29 39 33 -0.20 144 0 0 29 51 43 11 23 28.2 16 246 -50 29 45 14 29 58 12 29 43 41 29 59 45 -0.20 145 0 0 30 11 32 11 23 29.2 15 246 -51 30 5 4 30 18 0 30 3 31 30 19 34 -0.20 146 0 0 30 30 58 11 23 30.2 14 247 -52 30 24 31 30 37 25 30 22 58 30 38 59 -0.20 147 0 0 30 50 1 11 23 31.1 13 247 -53 30 43 34 30 56 27 30 42 1 30 58 0 -0.20 148 0 0 31 8 39 11 23 31.9 12 248 -54 31 2 14 31 15 5 31 0 41 31 16 38 -0.20 149 0 0 31 26 54 11 23 32.7 11 248 -55 31 20 30 31 33 19 31 18 57 31 34 52 -0.20 150 0 0 31 44 46 11 23 33.4 10 249 -55 31 38 22 31 51 10 31 36 49 31 52 42 -0.20 151 0 0 32 2 13 11 23 34.0 9 249 -56 31 55 50 32 8 36 31 54 18 32 10 9 -0.20 152 0 0 32 19 17 11 23 34.6 8 250 -57 32 12 54 32 25 39 32 11 22 32 27 11 -0.20 153 0 0 32 35 56 11 23 35.1 8 251 -58 32 29 35 32 42 18 32 28 3 32 43 50 -0.20 154 0 0 32 52 12 11 23 35.6 7 251 -59 32 45 51 32 58 33 32 44 20 33 0 5 -0.20 155 0 0 33 8 4 11 23 36.0 6 252 -59 33 1 44 33 14 24 33 0 12 33 15 55 -0.20 156 0 0 33 23 32 11 23 36.3 5 252 -60 33 17 12 33 29 51 33 15 41 33 31 22 -0.20 157 0 0 33 38 36 11 23 36.6 4 253 -61 33 32 17 33 44 54 33 30 46 33 46 25 -0.20 158 0 0 33 53 16 11 23 36.8 3 253 -62 33 46 58 33 59 34 33 45 27 34 1 5 -0.20 159 0 0 34 7 32 11 23 37.0 2 254 -62 34 1 15 34 13 49 33 59 44 34 15 20 -0.20 160 0 0 34 21 24 11 23 37.1 1 254 -63 34 15 8 34 27 41 34 13 37 34 29 11 -0.20 161 0 0 34 34 53 11 23 37.2 1 255 -64 34 28 37 34 41 9 34 27 7 34 42 39 -0.20 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: HIP 110375 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 21 22.6422 DE: -12 11 09.428 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 21 22.6421 DE: -12 11 09.428 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.5 * B mag [mag]: 9.5 * Diameter [mas]: 0.30 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2657) Bashkiria asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.15430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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", 0.001", 67.782° remarks: * orbital elements for (2657)Bashkiria : Mean anomaly = 303.8787884132 deg Arg. of pericenter = 13.6932954596 deg Long. of node = 50.1838956959 deg Inclination = 2.2433644335 deg Eccentricity = 0.1600963859 Semimajor axis = 3.1693917796 AU Perihelion dist = 2.6619836101 AU Mag: H = 12.29, G = 0.15 Epoch of elements : MJD 60659.47206471 TDT (2024 Dec 15.4721) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,0.81,2024,12,15,11.329559,-0.082556,0.188693,13.980661,6.093666,0.005208,0.001951,0.000000,0.000000 81.1228,-12.0615,8.89,-23.30,False HIP 110375,22.35628952,-12.1859519,9.45,8.50,7.99,0.3,0,,22.37831412,-12.0615069,9.57,9.64,0,0,0 2657,Bashkiria,18.07,21.893,3.1543,0,0,2.658,16.99,,2.0,0 0,303.7963,2024,12,15,13.6933,50.1839,2.2434,0.16010,3.16939,2.66198,12.29,5.0,0.15 1.120,0.0190,0.0011,68,0.0012,Known errors,0.96,0,-1,-1 20241215_110375,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org