IOTA/IOTA-ES occultation update for (2158) Tietjen / UCAC4 345-086872 event on 2024 Apr 05, 07:29 UT Visible from Summary ------- On 2024 Apr 05 UT, the 22.362 km diameter asteroid (2158) Tietjen will occult a 11.9 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.59 mag to 16.47 mag (the magnitude of the asteroid) for at most 5.020 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: 2024 Apr 05, 07:18 - 2024 Apr 05, 07:40 * geocentric midpoint of event [JD]: 2460405.81223109 * magnitude of target star: 11.90 * magnitude drop [mag]: 4.59 * estimated maximum duration [s]: 5.020 * Moon: 17 % sunlit, 73° distance * Sun: 120° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 9.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.001", 96°) * approx speed of asteroid's shadow [km/s]: 4.4529 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-086872 by 2158 Tietjen on 2024 Apr 5 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 -107 0 0 54 12 51 7 19 54.6 0 128 -30 53 54 45 .. .. .. 53 41 34 .. .. .. .... -106 0 0 53 45 37 7 19 54.9 1 129 -30 53 27 43 54 3 47 53 14 40 54 17 23 -0.82 -105 0 0 53 18 54 7 19 55.8 2 130 -30 53 1 10 53 36 53 52 48 14 53 50 19 -1.44 -104 0 0 52 52 40 7 19 57.3 2 130 -31 52 35 7 53 10 29 52 22 19 53 23 47 -1.67 -103 0 0 52 26 58 7 19 59.4 3 131 -31 52 9 35 52 44 36 51 56 54 52 57 47 -1.79 -102 0 0 52 1 48 7 20 2.1 4 132 -31 51 44 34 52 19 16 51 32 0 52 32 20 -1.86 -101 0 0 51 37 11 7 20 5.4 5 133 -32 51 20 6 51 54 30 51 7 38 52 7 26 -1.91 -100 0 0 51 13 7 7 20 9.4 5 134 -32 50 56 11 51 30 17 50 43 49 51 43 6 -1.95 - 99 0 0 50 49 38 7 20 13.9 6 134 -32 50 32 50 51 6 38 50 20 34 51 19 21 -1.98 - 98 0 0 50 26 43 7 20 19.0 7 135 -33 50 10 3 50 43 35 49 57 53 50 56 11 -2.00 - 97 0 0 50 4 24 7 20 24.7 8 136 -33 49 47 52 50 21 8 49 35 47 50 33 38 -2.02 - 96 0 0 49 42 40 7 20 30.9 8 137 -33 49 26 16 49 59 17 49 14 16 50 11 41 -2.04 - 95 0 0 49 21 34 7 20 37.8 9 138 -33 49 5 17 49 38 3 48 53 22 49 50 22 -2.05 - 94 0 0 49 1 5 7 20 45.2 10 138 -33 48 44 55 49 17 28 48 33 5 49 29 41 -2.06 - 93 0 0 48 41 15 7 20 53.2 10 139 -33 48 25 11 48 57 30 48 13 26 49 9 38 -2.07 - 92 0 0 48 22 3 7 21 1.8 11 140 -33 48 6 5 48 38 12 47 54 24 48 50 15 -2.09 - 91 0 0 48 3 30 7 21 10.9 12 141 -33 47 47 38 48 19 33 47 36 2 48 31 32 -2.09 - 90 0 0 47 45 38 7 21 20.6 12 142 -33 47 29 51 48 1 35 47 18 19 48 13 29 -2.10 - 89 0 0 47 28 25 7 21 30.8 13 143 -33 47 12 44 47 44 17 47 1 15 47 56 7 -2.11 - 88 0 0 47 11 54 7 21 41.5 14 144 -33 46 56 18 47 27 41 46 44 53 47 39 26 -2.12 - 87 0 0 46 56 4 7 21 52.8 14 144 -33 46 40 33 47 11 46 46 29 11 47 23 28 -2.13 - 86 0 0 46 40 56 7 22 4.5 15 145 -33 46 25 29 46 56 33 46 14 11 47 8 12 -2.14 - 85 0 0 46 26 31 7 22 16.8 16 146 -33 46 11 8 46 42 4 45 59 53 46 53 39 -2.14 - 84 0 0 46 12 48 7 22 29.5 16 147 -33 45 57 29 46 28 17 45 46 17 46 39 49 -2.15 - 83 0 0 45 59 49 7 22 42.7 17 148 -33 45 44 34 46 15 14 45 33 24 46 26 43 -2.16 - 82 0 0 45 47 34 7 22 56.4 17 149 -32 45 32 22 46 2 55 45 21 15 46 14 21 -2.16 - 81 0 0 45 36 3 7 23 10.5 18 150 -32 45 20 54 45 51 21 45 9 49 46 2 44 -2.17 - 80 0 0 45 25 16 7 23 25.1 18 151 -32 45 10 10 45 40 31 44 59 8 45 51 52 -2.17 - 79 0 0 45 15 14 7 23 40.0 19 152 -31 45 0 12 45 30 26 44 49 11 45 41 46 -2.18 - 78 0 0 45 5 58 7 23 55.3 19 153 -31 44 50 58 45 21 8 44 39 59 45 32 25 -2.18 - 77 0 0 44 57 28 7 24 11.1 20 154 -31 44 42 29 45 12 35 44 31 32 45 23 50 -2.19 - 76 0 0 44 49 43 7 24 27.2 20 155 -30 44 34 47 45 4 48 44 23 51 45 16 2 -2.19 - 75 0 0 44 42 45 7 24 43.6 21 156 -30 44 27 50 44 57 48 44 16 55 45 9 1 -2.20 - 74 0 0 44 36 33 7 25 0.4 21 157 -29 44 21 40 44 51 34 44 10 46 45 2 46 -2.20 - 73 0 0 44 31 8 7 25 17.5 21 158 -29 44 16 16 44 46 8 44 5 23 44 57 19 -2.21 - 72 0 0 44 26 30 7 25 34.9 22 159 -29 44 11 40 44 41 29 44 0 48 44 52 39 -2.21 - 71 0 0 44 22 40 7 25 52.5 22 160 -28 44 7 50 44 37 38 43 56 59 44 48 47 -2.21 - 70 0 0 44 19 37 7 26 10.5 22 161 -28 44 4 48 44 34 34 43 53 57 44 45 43 -2.22 - 69 0 0 44 17 21 7 26 28.6 23 162 -27 44 2 33 44 32 19 43 51 42 44 43 27 -2.22 - 68 0 0 44 15 54 7 26 47.0 23 163 -26 44 1 5 44 30 51 43 50 15 44 41 59 -2.22 - 67 0 0 44 15 14 7 27 5.6 23 164 -26 44 0 26 44 30 12 43 49 35 44 41 20 -2.23 - 66 0 0 44 15 23 7 27 24.3 23 165 -25 44 0 34 44 30 21 43 49 43 44 41 29 -2.23 - 65 0 0 44 16 20 7 27 43.3 24 166 -25 44 1 30 44 31 18 43 50 39 44 42 27 -2.23 - 64 0 0 44 18 5 7 28 2.3 24 167 -24 44 3 15 44 33 4 43 52 23 44 44 13 -2.23 - 63 0 0 44 20 38 7 28 21.5 24 168 -23 44 5 47 44 35 38 43 54 54 44 46 49 -2.23 - 62 0 0 44 24 0 7 28 40.8 24 169 -23 44 9 7 44 39 1 43 58 14 44 50 13 -2.24 - 61 0 0 44 28 10 7 29 0.1 24 170 -22 44 13 16 44 43 13 44 2 21 44 54 25 -2.24 - 60 0 0 44 33 8 7 29 19.5 24 172 -21 44 18 12 44 48 13 44 7 16 44 59 27 -2.24 - 59 0 0 44 38 55 7 29 38.9 24 173 -21 44 23 57 44 54 1 44 13 0 45 5 17 -2.24 - 58 0 0 44 45 29 7 29 58.3 24 174 -20 44 30 29 45 0 38 44 19 31 45 11 55 -2.24 - 57 0 0 44 52 52 7 30 17.8 24 175 -19 44 37 50 45 8 4 44 26 49 45 19 22 -2.24 - 56 0 0 45 1 3 7 30 37.1 24 176 -18 44 45 58 45 16 17 44 34 55 45 27 38 -2.24 - 55 0 0 45 10 1 7 30 56.5 24 177 -18 44 54 53 45 25 19 44 43 49 45 36 42 -2.24 - 54 0 0 45 19 47 7 31 15.7 24 178 -17 45 4 36 45 35 8 44 53 29 45 46 34 -2.24 - 53 0 0 45 30 21 7 31 34.9 24 179 -16 45 15 6 45 45 45 45 3 57 45 57 14 -2.24 - 52 0 0 45 41 42 7 31 53.9 23 180 -15 45 26 24 45 57 10 45 15 12 46 8 41 -2.23 - 51 0 0 45 53 50 7 32 12.7 23 182 -15 45 38 27 46 9 22 45 27 13 46 20 56 -2.23 - 50 0 0 46 6 44 7 32 31.4 23 183 -14 45 51 18 46 22 21 45 40 0 46 33 58 -2.23 - 49 0 0 46 20 25 7 32 49.9 23 184 -13 46 4 54 46 36 6 45 53 33 46 47 47 -2.23 - 48 0 0 46 34 52 7 33 8.2 22 185 -12 46 19 16 46 50 38 46 7 52 47 2 23 -2.23 - 47 0 0 46 50 5 7 33 26.3 22 186 -12 46 34 24 47 5 56 46 22 56 47 17 45 -2.23 - 46 0 0 47 6 3 7 33 44.1 22 187 -11 46 50 17 47 21 59 46 38 45 47 33 52 -2.23 - 45 0 0 47 22 45 7 34 1.6 21 188 -10 47 6 54 47 38 48 46 55 18 47 50 45 -2.22 - 44 0 0 47 40 13 7 34 18.9 21 189 -9 47 24 15 47 56 21 47 12 35 48 8 23 -2.22 - 43 0 0 47 58 24 7 34 35.8 20 190 -8 47 42 21 48 14 39 47 30 36 48 26 46 -2.22 - 42 0 0 48 17 19 7 34 52.4 20 191 -8 48 1 9 48 33 40 47 49 20 48 45 52 -2.22 - 41 0 0 48 36 56 7 35 8.6 20 192 -7 48 20 40 48 53 25 48 8 46 49 5 42 -2.22 - 40 0 0 48 57 16 7 35 24.4 19 193 -6 48 40 52 49 13 52 48 28 53 49 26 15 -2.21 - 39 0 0 49 18 18 7 35 39.8 19 194 -5 49 1 46 49 35 1 48 49 42 49 47 30 -2.21 - 38 0 0 49 40 0 7 35 54.9 18 195 -5 49 23 21 49 56 52 49 11 11 50 9 27 -2.21 - 37 0 0 50 2 23 7 36 9.5 18 196 -4 49 45 36 50 19 23 49 33 21 50 32 5 -2.21 - 36 0 0 50 25 26 7 36 23.6 17 197 -3 50 8 31 50 42 35 49 56 9 50 55 23 -2.21 - 35 0 0 50 49 8 7 36 37.3 16 198 -2 50 32 4 51 6 26 50 19 36 51 19 21 -2.20 - 34 0 0 51 13 28 7 36 50.5 16 199 -2 50 56 15 51 30 56 50 43 40 51 43 58 -2.20 - 33 0 0 51 38 26 7 37 3.2 15 200 -1 51 21 3 51 56 3 51 8 22 52 9 13 -2.20 - 32 0 0 52 4 1 7 37 15.4 15 201 0 51 46 28 52 21 48 51 33 39 52 35 6 -2.20 - 31 0 0 52 30 11 7 37 27.0 14 202 1 52 12 28 52 48 9 51 59 32 53 1 35 -2.20 - 30 0 0 52 56 56 7 37 38.2 13 203 1 52 39 2 53 15 6 52 25 59 53 28 41 -2.20 - 29 0 0 53 24 16 7 37 48.8 13 204 2 53 6 11 53 42 37 52 53 0 53 56 21 -2.20 - 28 0 0 53 52 9 7 37 58.8 12 205 3 53 33 52 54 10 42 53 20 33 54 24 35 -2.20 - 27 0 0 54 20 34 7 38 8.2 11 206 3 54 2 5 54 39 19 53 48 37 54 53 22 -2.20 - 26 0 0 54 49 30 7 38 17.1 11 207 4 54 30 49 55 8 28 54 17 12 55 22 41 -2.20 - 25 0 0 55 18 56 7 38 25.4 10 207 5 55 0 3 55 38 8 54 46 17 55 52 31 -2.20 - 24 0 0 55 48 52 7 38 33.1 9 208 5 55 29 45 56 8 18 55 15 50 56 22 52 -2.20 - 23 0 0 56 19 16 7 38 40.1 8 209 6 55 59 55 56 38 56 55 45 50 56 53 42 -2.21 - 22 0 0 56 50 6 7 38 46.6 8 210 6 56 30 31 57 10 2 56 16 16 57 24 59 -2.21 - 21 0 0 57 21 23 7 38 52.5 7 211 7 57 1 33 57 41 35 56 47 8 57 56 44 -2.22 - 20 0 0 57 53 5 7 38 57.7 6 212 7 57 32 59 58 13 32 57 18 23 58 28 54 -2.22 - 19 0 0 58 25 10 7 39 2.4 5 213 8 58 4 48 58 45 54 57 50 1 59 1 29 -2.23 - 18 0 0 58 57 37 7 39 6.4 5 214 9 58 36 59 59 18 39 58 22 0 59 34 27 -2.24 - 17 0 0 59 30 25 7 39 9.8 4 215 9 59 9 30 59 51 45 58 54 20 60 7 48 -2.26 - 15 59 59 60 3 33 7 39 12.6 3 215 10 59 42 21 60 25 12 59 26 58 60 41 29 -2.29 - 14 59 59 60 37 0 7 39 14.8 2 216 10 60 15 29 60 58 58 59 59 53 61 15 31 -2.33 - 13 59 59 61 10 43 7 39 16.4 2 217 10 60 48 54 61 33 2 60 33 5 61 49 50 -2.40 - 12 59 59 61 44 43 7 39 17.4 1 218 11 61 22 34 62 7 22 61 6 31 62 24 27 -2.59 - 11 59 59 62 18 56 7 39 17.8 0 219 11 61 56 27 .. .. .. 61 40 11 .. .. .. -3.93 Uncertainty in time = +/- 9 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 345-086872 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 57 10.7542 DE: -21 03 36.296 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 57 10.7542 DE: -21 03 36.296 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2158) Tietjen asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.015 distance from Earth [AU]: 2.02870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.028", 0.001", 95.8° remarks: * orbital elements for (2158)Tietjen : Mean anomaly = 322.7535006173 deg Arg. of pericenter = 101.5678234038 deg Long. of node = 187.2355960447 deg Inclination = 1.5858108040 deg Eccentricity = 0.1800955155 Semimajor axis = 3.0713916033 AU Perihelion dist = 2.5182477491 AU Mag: H = 11.83, G = 0.15 Epoch of elements : MJD 60405.31223029 TDT (2024 Apr 05.3122) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,5.02,2024,4,5,7.493546,-0.090177,0.906714,2.501003,0.248827,-0.004941,0.000446,0.000001,0.000000 -51.8418,-21.0990,68.25,6.30,False UCAC4 345-086872,16.95298726,-21.0600822,12.61,11.90,11.52,0.0,0,,16.97713526,-21.0990076,4.58,4.52,0,0,0 2158,Tietjen,16.47,22.362,2.0287,0,0,0.774,1.08,,2.0,0 0,322.6963,2024,4,5,101.5678,187.2356,1.5858,0.18010,3.07139,2.51825,11.83,5.0,0.15 1.369,0.0277,0.0011,96,0.0056,Known errors,1.38,0,-1,-1 20240405_086872,60139.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org