IOTA/IOTA-ES occultation update for (234) Barbara / UCAC4 416-141013 event on 2023 Jul 25, 07:10 UT Visible from E Canada, E USA, Mexico Summary ------- On 2023 Jul 25 UT, the 45.9 km diameter asteroid (234) Barbara will occult a 11.9 mag star in the constellation Aquila for observers along a path across E Canada, E USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.30 mag to 10.64 mag (the magnitude of the asteroid) for at most 5.640 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: 98 * date and approx. time of event: 2023 Jul 25, 06:57 - 2023 Jul 25, 07:23 * geocentric midpoint of event [JD]: 2460150.79897692 * magnitude of target star: 11.87 * magnitude drop [mag]: 0.30 * estimated maximum duration [s]: 5.640 * Moon: 44 % sunlit, 99° distance * Sun: 167° distance * rough path description: E Canada, E USA, Mexico The occultation path -------------------- * approximate projected width [km]: 46 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.033, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.033", 0.007", 84°) * approx speed of asteroid's shadow [km/s]: 8.1433 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 416-141013 by 234 Barbara on 2023 Jul 25 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 153 0 0 -48 33 40 7 23 29.1 0 100 -10 -48 21 1 -48 46 19 -48 12 16 -48 55 4 .... 154 0 0 -48 40 23 7 23 29.0 1 99 -10 -48 27 46 -48 52 59 -48 19 1 -49 1 43 -0.03 155 0 0 -48 46 29 7 23 28.8 2 99 -11 -48 33 54 -48 59 4 -48 25 11 -49 7 47 -0.07 156 0 0 -48 52 0 7 23 28.5 2 98 -12 -48 39 26 -49 4 34 -48 30 44 -49 13 15 -0.08 157 0 0 -48 56 56 7 23 28.0 3 97 -12 -48 44 24 -49 9 28 -48 35 42 -49 18 9 -0.09 158 0 0 -49 1 17 7 23 27.5 4 96 -13 -48 48 46 -49 13 48 -48 40 5 -49 22 27 -0.09 159 0 0 -49 5 3 7 23 26.9 4 96 -14 -48 52 33 -49 17 33 -48 43 54 -49 26 12 -0.09 160 0 0 -49 8 15 7 23 26.1 5 95 -14 -48 55 46 -49 20 44 -48 47 7 -49 29 22 -0.10 161 0 0 -49 10 53 7 23 25.3 6 94 -15 -48 58 25 -49 23 21 -48 49 46 -49 31 59 -0.10 162 0 0 -49 12 57 7 23 24.4 6 93 -15 -49 0 29 -49 25 25 -48 51 51 -49 34 2 -0.10 163 0 0 -49 14 27 7 23 23.3 7 93 -16 -49 2 0 -49 26 54 -48 53 22 -49 35 31 -0.10 164 0 0 -49 15 24 7 23 22.2 8 92 -17 -49 2 57 -49 27 51 -48 54 19 -49 36 27 -0.10 165 0 0 -49 15 47 7 23 21.0 8 91 -17 -49 3 20 -49 28 13 -48 54 43 -49 36 50 -0.10 166 0 0 -49 15 36 7 23 19.7 9 90 -18 -49 3 9 -49 28 3 -48 54 32 -49 36 40 -0.10 167 0 0 -49 14 52 7 23 18.2 10 90 -19 -49 2 25 -49 27 19 -48 53 48 -49 35 56 -0.10 168 0 0 -49 13 35 7 23 16.7 10 89 -19 -49 1 7 -49 26 2 -48 52 30 -49 34 39 -0.10 169 0 0 -49 11 44 7 23 15.1 11 88 -20 -48 59 16 -49 24 11 -48 50 38 -49 32 49 -0.10 170 0 0 -49 9 19 7 23 13.3 11 87 -21 -48 56 51 -49 21 47 -48 48 12 -49 30 25 -0.10 171 0 0 -49 6 21 7 23 11.5 12 87 -21 -48 53 52 -49 18 50 -48 45 13 -49 27 28 -0.10 172 0 0 -49 2 49 7 23 9.6 13 86 -22 -48 50 19 -49 15 19 -48 41 39 -49 23 58 -0.10 173 0 0 -48 58 43 7 23 7.5 13 85 -23 -48 46 12 -49 11 14 -48 37 32 -49 19 54 -0.10 174 0 0 -48 54 3 7 23 5.4 14 84 -23 -48 41 31 -49 6 35 -48 32 50 -49 15 16 -0.10 175 0 0 -48 48 49 7 23 3.1 15 84 -24 -48 36 15 -49 1 23 -48 27 33 -49 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50 26 -0.13 - 86 0 0 28 31 49 7 2 20.8 50 210 -39 28 51 57 28 11 43 29 5 55 27 57 49 -0.13 - 85 0 0 29 37 44 7 2 6.4 49 210 -38 29 57 45 29 17 44 30 11 38 29 3 55 -0.13 - 84 0 0 30 42 19 7 1 52.6 48 211 -36 31 2 13 30 22 27 31 16 1 30 8 42 -0.13 - 83 0 0 31 45 33 7 1 39.3 46 212 -35 32 5 20 31 25 48 32 19 2 31 12 9 -0.13 - 82 0 0 32 47 25 7 1 26.4 45 212 -34 33 7 3 32 27 48 33 20 40 32 14 13 -0.13 - 81 0 0 33 47 52 7 1 14.1 44 213 -32 34 7 22 33 28 23 34 20 54 33 14 55 -0.13 - 80 0 0 34 46 55 7 1 2.3 43 213 -31 35 6 16 34 27 34 35 19 42 34 14 12 -0.13 - 79 0 0 35 44 32 7 0 51.0 41 214 -30 36 3 45 35 25 20 36 17 4 35 12 4 -0.13 - 78 0 0 36 40 43 7 0 40.1 40 215 -29 36 59 47 36 21 41 37 13 1 36 8 30 -0.13 - 77 0 0 37 35 29 7 0 29.7 39 215 -28 37 54 24 37 16 35 38 7 30 37 3 31 -0.13 - 76 0 0 38 28 49 7 0 19.8 38 216 -27 38 47 34 38 10 4 39 0 34 37 57 7 -0.13 - 75 0 0 39 20 43 7 0 10.3 37 217 -25 39 39 19 39 2 8 39 52 13 38 49 17 -0.13 - 74 0 0 40 11 12 7 0 1.2 36 217 -24 40 29 39 39 52 47 40 42 26 39 40 2 -0.13 - 73 0 0 41 0 17 6 59 52.6 35 218 -23 41 18 34 40 42 2 41 31 14 40 29 24 -0.13 - 72 0 0 41 47 59 6 59 44.4 33 219 -22 42 6 6 41 29 53 42 18 39 41 17 22 -0.13 - 71 0 0 42 34 18 6 59 36.5 32 220 -21 42 52 15 42 16 22 43 4 42 42 3 58 -0.13 - 70 0 0 43 19 16 6 59 29.1 31 220 -20 43 37 4 43 1 30 43 49 23 42 49 12 -0.13 - 69 0 0 44 2 54 6 59 22.0 30 221 -19 44 20 32 43 45 18 44 32 45 43 33 7 -0.13 - 68 0 0 44 45 14 6 59 15.2 29 222 -18 45 2 41 44 27 47 45 14 47 44 15 43 -0.13 - 67 0 0 45 26 16 6 59 8.8 28 222 -17 45 43 34 45 8 59 45 55 33 44 57 1 -0.13 - 66 0 0 46 6 2 6 59 2.7 27 223 -16 46 23 10 45 48 55 46 35 3 45 37 4 -0.13 - 65 0 0 46 44 34 6 58 56.9 27 224 -15 47 1 32 46 27 36 47 13 18 46 15 52 -0.13 - 64 0 0 47 21 53 6 58 51.4 26 225 -14 47 38 42 47 5 5 47 50 21 46 53 27 -0.12 - 63 0 0 47 58 1 6 58 46.2 25 225 -14 48 14 41 47 41 22 48 26 14 47 29 51 -0.12 - 62 0 0 48 33 0 6 58 41.3 24 226 -13 48 49 30 48 16 30 49 0 56 48 5 5 -0.12 - 61 0 0 49 6 50 6 58 36.6 23 227 -12 49 23 12 48 50 30 49 34 32 48 39 12 -0.12 - 60 0 0 49 39 35 6 58 32.2 22 228 -11 49 55 47 49 23 24 50 7 1 49 12 11 -0.12 - 59 0 0 50 11 15 6 58 28.0 21 228 -10 50 27 18 49 55 12 50 38 25 49 44 6 -0.12 - 58 0 0 50 41 52 6 58 24.1 20 229 -9 50 57 46 50 25 58 51 8 48 50 14 58 -0.12 - 57 0 0 51 11 27 6 58 20.4 20 230 -9 51 27 13 50 55 42 51 38 8 50 44 48 -0.12 - 56 0 0 51 40 3 6 58 16.8 19 231 -8 51 55 40 51 24 26 52 6 30 51 13 37 -0.12 - 55 0 0 52 7 40 6 58 13.5 18 231 -7 52 23 9 51 52 11 52 33 53 51 41 29 -0.12 - 54 0 0 52 34 21 6 58 10.4 17 232 -6 52 49 42 52 19 0 53 0 20 52 8 23 -0.12 - 53 0 0 53 0 6 6 58 7.4 17 233 -6 53 15 19 52 44 53 53 25 52 52 34 22 -0.12 - 52 0 0 53 24 58 6 58 4.6 16 234 -5 53 40 3 53 9 53 53 50 31 52 59 26 -0.12 - 51 0 0 53 48 57 6 58 2.0 15 235 -4 54 3 55 53 34 0 54 14 17 53 23 38 -0.12 - 50 0 0 54 12 6 6 57 59.6 15 235 -4 54 26 56 53 57 15 54 37 13 53 46 59 -0.12 - 49 0 0 54 34 24 6 57 57.2 14 236 -3 54 49 8 54 19 41 54 59 20 54 9 30 -0.12 - 48 0 0 54 55 55 6 57 55.1 13 237 -2 55 10 32 54 41 19 55 20 39 54 31 12 -0.12 - 47 0 0 55 16 38 6 57 53.1 13 238 -2 55 31 8 55 2 9 55 41 11 54 52 7 -0.11 - 46 0 0 55 36 36 6 57 51.2 12 239 -1 55 50 59 55 22 13 56 0 58 55 12 16 -0.11 - 45 0 0 55 55 49 6 57 49.4 11 239 0 56 10 6 55 41 33 56 20 0 55 31 40 -0.11 - 44 0 0 56 14 19 6 57 47.8 11 240 0 56 28 30 56 0 9 56 38 19 55 50 20 -0.11 - 43 0 0 56 32 6 6 57 46.2 10 241 1 56 46 11 56 18 2 56 55 56 56 8 17 -0.11 - 42 0 0 56 49 12 6 57 44.8 9 242 2 57 3 11 56 35 14 57 12 53 56 25 33 -0.11 - 41 0 0 57 5 38 6 57 43.5 9 243 2 57 19 32 56 51 45 57 29 9 56 42 9 -0.11 - 40 0 0 57 21 25 6 57 42.3 8 244 3 57 35 13 57 7 37 57 44 46 56 58 4 -0.11 - 39 0 0 57 36 33 6 57 41.2 8 244 3 57 50 16 57 22 51 57 59 46 57 13 22 -0.11 - 38 0 0 57 51 4 6 57 40.2 7 245 4 58 4 42 57 37 27 58 14 8 57 28 1 -0.11 - 37 0 0 58 4 58 6 57 39.3 6 246 5 58 18 31 57 51 26 58 27 54 57 42 4 -0.11 - 36 0 0 58 18 17 6 57 38.5 6 247 5 58 31 45 58 4 49 58 41 5 57 55 30 -0.11 - 35 0 0 58 31 1 6 57 37.7 5 248 6 58 44 24 58 17 37 58 53 41 58 8 21 -0.10 - 34 0 0 58 43 10 6 57 37.1 5 249 6 58 56 29 58 29 51 59 5 43 58 20 38 -0.10 - 33 0 0 58 54 46 6 57 36.5 4 250 7 59 8 1 58 41 31 59 17 12 58 32 21 -0.10 - 32 0 0 59 5 50 6 57 36.0 4 250 7 59 19 1 58 52 39 59 28 9 58 43 31 -0.10 - 31 0 0 59 16 21 6 57 35.6 3 251 8 59 29 28 59 3 14 59 38 34 58 54 9 -0.10 - 30 0 0 59 26 20 6 57 35.2 2 252 8 59 39 24 59 13 17 59 48 27 59 4 15 -0.10 - 29 0 0 59 35 49 6 57 35.0 2 253 9 59 48 50 59 22 49 59 57 50 59 13 49 -0.09 - 28 0 0 59 44 48 6 57 34.7 1 254 9 59 57 45 59 31 51 60 6 43 59 22 53 -0.09 - 27 0 0 59 53 16 6 57 34.6 1 255 10 60 6 10 59 40 23 60 15 6 59 31 27 -0.07 - 26 0 0 60 1 16 6 57 34.5 0 256 11 60 14 7 59 48 25 60 23 1 59 39 31 -0.03 Uncertainty in time = +/- 3 secs Prediction of 2023 May 29.0 Data for the target star ------------------------ * name: UCAC4 416-141013 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 14 26.2267 DE: -06 57 13.156 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 14 26.2267 DE: -06 57 13.156 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (234) Barbara asteroid class: Barbarian approx. diameter [km]: 46 approx. diameter ["]: 0.073 distance from Earth [AU]: 0.86190 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#102 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): 0.033", 0.007", 83.964° remarks: * orbital elements for (234)Barbara : Mean anomaly = 339.1078363562 deg Arg. of pericenter = 192.3973807145 deg Long. of node = 144.4909173944 deg Inclination = 15.3754068641 deg Eccentricity = 0.2450843657 Semimajor axis = 2.3853468940 AU Perihelion dist = 1.8007356636 AU Mag: H = 9.10, G = 0.15 Epoch of elements : MJD 60150.29881945 TDT (2023 Jul 25.2988) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1022023Apr24,5.64,2023,7,25,7.175446,-0.084434,0.059728,-2.654230,-3.752504,0.000069,-0.001079,0.000001,0.000000 -106.4455,-6.8818,74.02,19.69,False UCAC4 416-141013,20.24061852,-6.9536545,0.00,11.87,0.00,0.0,0,,20.26187062,-6.8817784,0.30,0.00,0,0,0 234,Barbara,10.64,45.9,0.8619,0,0,-1.819,-38.30,,2.6,0 0,339.0279,2023,7,25,192.3974,144.4909,15.3754,0.24508,2.38535,1.80074,9.09,5.0,0.15 1.346,0.0333,0.0067,84,0.0254,Known errors,-1.00,-1,-1,-1 20230725_141013,60092.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 28, 23:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org