IOTA/IOTA-ES occultation update for (2158) Tietjen / UCAC4 350-079195 event on 2024 Feb 08, 19:24 UT Visible from Summary ------- On 2024 Feb 08 UT, the 22.376 km diameter asteroid (2158) Tietjen will occult a 11.9 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.39 mag to 17.31 mag (the magnitude of the asteroid) for at most 0.850 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: 100 * date and approx. time of event: 2024 Feb 08, 19:20 - 2024 Feb 08, 19:27 * geocentric midpoint of event [JD]: 2460349.30853054 * magnitude of target star: 11.93 * magnitude drop [mag]: 5.39 * estimated maximum duration [s]: 0.850 * Moon: 2 % sunlit, 59° distance * Sun: 75° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.001", 100°) * approx speed of asteroid's shadow [km/s]: 26.3077 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 350-079195 by 2158 Tietjen on 2024 Feb 8 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 76 0 0 -21 34 55 19 20 50.9 1 111 -53 -21 42 38 -21 27 13 -21 44 4 -21 25 48 .... 77 0 0 -21 57 27 19 20 51.0 2 111 -53 -22 5 10 -21 49 44 -22 6 36 -21 48 18 0.52 78 0 0 -22 20 12 19 20 51.2 3 111 -53 -22 27 57 -22 12 28 -22 29 23 -22 11 3 0.56 79 0 0 -22 43 11 19 20 51.4 4 110 -52 -22 50 56 -22 35 26 -22 52 22 -22 34 0 0.58 80 0 0 -23 6 22 19 20 51.8 5 110 -51 -23 14 8 -22 58 36 -23 15 34 -22 57 10 0.59 81 0 0 -23 29 45 19 20 52.2 6 109 -51 -23 37 32 -23 21 59 -23 38 58 -23 20 33 0.60 82 0 0 -23 53 19 19 20 52.8 6 109 -50 -24 1 7 -23 45 32 -24 2 34 -23 44 6 0.60 83 0 0 -24 17 5 19 20 53.4 7 109 -50 -24 24 53 -24 9 17 -24 26 20 -24 7 50 0.61 84 0 0 -24 41 0 19 20 54.1 8 108 -49 -24 48 49 -24 33 11 -24 50 16 -24 31 45 0.61 85 0 0 -25 5 5 19 20 54.8 9 108 -48 -25 12 55 -24 57 16 -25 14 22 -24 55 49 0.61 86 0 0 -25 29 18 19 20 55.7 10 107 -48 -25 37 9 -25 21 28 -25 38 36 -25 20 2 0.61 87 0 0 -25 53 40 19 20 56.6 11 107 -47 -26 1 31 -25 45 50 -26 2 59 -25 44 22 0.61 88 0 0 -26 18 9 19 20 57.7 12 106 -46 -26 26 1 -26 10 18 -26 27 29 -26 8 51 0.61 89 0 0 -26 42 45 19 20 58.8 13 106 -46 -26 50 38 -26 34 54 -26 52 6 -26 33 26 0.62 90 0 0 -27 7 28 19 20 59.9 14 105 -45 -27 15 21 -26 59 35 -27 16 49 -26 58 8 0.62 91 0 0 -27 32 15 19 21 1.2 15 105 -44 -27 40 9 -27 24 22 -27 41 37 -27 22 55 0.62 92 0 0 -27 57 8 19 21 2.5 16 104 -44 -28 5 2 -27 49 14 -28 6 30 -27 47 47 0.62 93 0 0 -28 22 4 19 21 4.0 17 104 -43 -28 29 59 -28 14 10 -28 31 27 -28 12 43 0.62 94 0 0 -28 47 4 19 21 5.4 18 103 -42 -28 54 59 -28 39 10 -28 56 28 -28 37 42 0.62 95 0 0 -29 12 7 19 21 7.0 19 103 -41 -29 20 2 -29 4 12 -29 21 31 -29 2 44 0.62 96 0 0 -29 37 11 19 21 8.6 20 102 -40 -29 45 7 -29 29 16 -29 46 36 -29 27 48 0.62 97 0 0 -30 2 17 19 21 10.3 21 102 -40 -30 10 14 -29 54 21 -30 11 42 -29 52 53 0.62 98 0 0 -30 27 23 19 21 12.1 22 101 -39 -30 35 20 -30 19 27 -30 36 49 -30 17 59 0.62 99 0 0 -30 52 29 19 21 13.9 23 100 -38 -31 0 27 -30 44 33 -31 1 55 -30 43 5 0.62 100 0 0 -31 17 35 19 21 15.8 24 100 -37 -31 25 32 -31 9 38 -31 27 1 -31 8 10 0.62 101 0 0 -31 42 38 19 21 17.8 25 99 -36 -31 50 36 -31 34 41 -31 52 5 -31 33 13 0.62 102 0 0 -32 7 40 19 21 19.8 26 99 -36 -32 15 38 -31 59 43 -32 17 7 -31 58 14 0.62 103 0 0 -32 32 39 19 21 21.9 27 98 -35 -32 40 37 -32 24 41 -32 42 5 -32 23 13 0.62 104 0 0 -32 57 34 19 21 24.1 27 97 -34 -33 5 32 -32 49 36 -33 7 1 -32 48 8 0.62 105 0 0 -33 22 24 19 21 26.3 28 96 -33 -33 30 23 -33 14 27 -33 31 51 -33 12 58 0.62 106 0 0 -33 47 10 19 21 28.5 29 96 -32 -33 55 9 -33 39 12 -33 56 37 -33 37 44 0.62 107 0 0 -34 11 50 19 21 30.8 30 95 -31 -34 19 49 -34 3 52 -34 21 18 -34 2 24 0.62 108 0 0 -34 36 24 19 21 33.2 31 94 -30 -34 44 23 -34 28 26 -34 45 52 -34 26 58 0.62 109 0 0 -35 0 51 19 21 35.6 32 93 -30 -35 8 50 -34 52 54 -35 10 19 -34 51 25 0.62 110 0 0 -35 25 11 19 21 38.0 33 93 -29 -35 33 10 -35 17 13 -35 34 38 -35 15 45 0.62 111 0 0 -35 49 23 19 21 40.5 34 92 -28 -35 57 21 -35 41 25 -35 58 50 -35 39 57 0.62 112 0 0 -36 13 26 19 21 43.1 34 91 -27 -36 21 24 -36 5 28 -36 22 53 -36 4 0 0.62 113 0 0 -36 37 19 19 21 45.6 35 90 -26 -36 45 17 -36 29 22 -36 46 46 -36 27 54 0.62 114 0 0 -37 1 3 19 21 48.3 36 89 -25 -37 9 1 -36 53 6 -37 10 30 -36 51 38 0.62 115 0 0 -37 24 37 19 21 50.9 37 88 -25 -37 32 34 -37 16 40 -37 34 3 -37 15 12 0.62 116 0 0 -37 48 0 19 21 53.6 38 87 -24 -37 55 57 -37 40 3 -37 57 25 -37 38 35 0.62 117 0 0 -38 11 11 19 21 56.3 38 86 -23 -38 19 8 -38 3 15 -38 20 36 -38 1 47 0.62 118 0 0 -38 34 10 19 21 59.1 39 85 -22 -38 42 7 -38 26 14 -38 43 35 -38 24 46 0.62 119 0 0 -38 56 57 19 22 1.8 40 84 -21 -39 4 53 -38 49 2 -39 6 22 -38 47 34 0.62 120 0 0 -39 19 32 19 22 4.6 41 83 -20 -39 27 27 -39 11 37 -39 28 55 -39 10 9 0.62 121 0 0 -39 41 52 19 22 7.5 41 82 -20 -39 49 48 -39 33 58 -39 51 16 -39 32 30 0.62 122 0 0 -40 4 0 19 22 10.3 42 81 -19 -40 11 54 -39 56 6 -40 13 22 -39 54 38 0.62 123 0 0 -40 25 53 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34 32 19 24 2.4 58 23 10 -50 41 55 -50 27 9 -50 43 18 -50 25 47 0.62 161 0 0 -50 45 8 19 24 5.2 58 21 11 -50 52 31 -50 37 46 -50 53 53 -50 36 24 0.62 162 0 0 -50 55 27 19 24 8.0 58 20 11 -51 2 49 -50 48 5 -51 4 11 -50 46 44 0.62 163 0 0 -51 5 27 19 24 10.8 58 18 12 -51 12 48 -50 58 6 -51 14 10 -50 56 45 0.62 164 0 0 -51 15 8 19 24 13.6 58 16 13 -51 22 29 -51 7 49 -51 23 50 -51 6 27 0.62 165 0 0 -51 24 32 19 24 16.4 58 14 13 -51 31 52 -51 17 13 -51 33 13 -51 15 52 0.62 166 0 0 -51 33 37 19 24 19.1 58 12 14 -51 40 56 -51 26 19 -51 42 17 -51 24 58 0.62 167 0 0 -51 42 25 19 24 21.8 58 10 14 -51 49 43 -51 35 7 -51 51 4 -51 33 46 0.62 168 0 0 -51 50 54 19 24 24.5 58 9 15 -51 58 11 -51 43 37 -51 59 32 -51 42 16 0.62 169 0 0 -51 59 5 19 24 27.3 58 7 16 -52 6 22 -51 51 49 -52 7 43 -51 50 28 0.62 170 0 0 -52 6 58 19 24 29.9 58 5 16 -52 14 15 -51 59 43 -52 15 35 -51 58 22 0.62 171 0 0 -52 14 34 19 24 32.6 58 3 17 -52 21 49 -52 7 19 -52 23 10 -52 5 59 0.62 172 0 0 -52 21 52 19 24 35.3 58 1 18 -52 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46 7 -48 31 3 -48 47 31 -48 29 40 0.63 -115 0 0 -48 24 47 19 27 13.2 26 269 56 -48 32 20 -48 17 15 -48 33 44 -48 15 51 0.63 -114 0 0 -48 10 41 19 27 14.8 25 268 56 -48 18 15 -48 3 8 -48 19 39 -48 1 44 0.64 -113 0 0 -47 56 17 19 27 16.3 25 267 57 -48 3 52 -47 48 42 -48 5 16 -47 47 18 0.64 -112 0 0 -47 41 34 19 27 17.8 24 266 57 -47 49 10 -47 33 59 -47 50 34 -47 32 34 0.64 -111 0 0 -47 26 32 19 27 19.2 23 265 57 -47 34 9 -47 18 56 -47 35 34 -47 17 32 0.64 -110 0 0 -47 11 13 19 27 20.6 23 264 58 -47 18 50 -47 3 36 -47 20 15 -47 2 11 0.64 -109 0 0 -46 55 35 19 27 22.0 22 264 58 -47 3 13 -46 47 57 -47 4 38 -46 46 32 0.64 -108 0 0 -46 39 38 19 27 23.4 21 263 58 -46 47 18 -46 32 0 -46 48 43 -46 30 35 0.64 -107 0 0 -46 23 24 19 27 24.7 20 262 59 -46 31 4 -46 15 44 -46 32 29 -46 14 19 0.64 -106 0 0 -46 6 51 19 27 26.0 20 261 59 -46 14 32 -45 59 11 -46 15 58 -45 57 45 0.64 -105 0 0 -45 50 1 19 27 27.2 19 260 59 -45 57 43 -45 42 19 -45 59 8 -45 40 54 0.64 -104 0 0 -45 32 52 19 27 28.4 18 260 59 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60 -41 52 40 -41 36 57 -41 54 8 -41 35 30 0.67 - 91 0 0 -41 24 3 19 27 40.2 8 250 60 -41 31 55 -41 16 11 -41 33 23 -41 14 44 0.68 - 90 0 0 -41 3 2 19 27 40.8 7 250 59 -41 10 55 -40 55 10 -41 12 23 -40 53 43 0.68 - 89 0 0 -40 41 47 19 27 41.3 6 249 59 -40 49 41 -40 33 55 -40 51 9 -40 32 27 0.69 - 88 0 0 -40 20 18 19 27 41.7 6 248 59 -40 28 12 -40 12 25 -40 29 40 -40 10 57 0.70 - 87 0 0 -39 58 35 19 27 42.1 5 248 59 -40 6 29 -39 50 41 -40 7 57 -39 49 13 0.72 - 86 0 0 -39 36 38 19 27 42.4 4 247 59 -39 44 33 -39 28 44 -39 46 1 -39 27 16 0.74 - 85 0 0 -39 14 28 19 27 42.6 3 246 58 -39 22 23 -39 6 34 -39 23 52 -39 5 6 0.77 - 84 0 0 -38 52 6 19 27 42.8 2 246 58 -39 0 1 -38 44 11 -39 1 30 -38 42 43 0.84 - 83 0 0 -38 29 31 19 27 43.0 1 245 58 -38 37 27 -38 21 36 -38 38 55 -38 20 8 0.99 - 82 0 0 -38 6 44 19 27 43.0 0 245 57 -38 14 41 -37 58 49 -38 16 9 -37 57 21 1.92 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 350-079195 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 07 43.9947 DE: -20 00 15.703 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 07 43.9949 DE: -20 00 15.703 * 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 ["]: 0.011 distance from Earth [AU]: 2.84140 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): 0.020", 0.001", 99.951° remarks: * orbital elements for (2158)Tietjen : Mean anomaly = 312.4069364488 deg Arg. of pericenter = 101.5720022924 deg Long. of node = 187.2351590091 deg Inclination = 1.5857972556 deg Eccentricity = 0.1801243281 Semimajor axis = 3.0714384364 AU Perihelion dist = 2.5181976518 AU Mag: H = 11.83, G = 0.15 Epoch of elements : MJD 60348.80853054 TDT (2024 Feb 08.8085) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,0.85,2024,2,8,19.404733,-0.082154,-0.518687,14.666739,-2.318228,-0.005648,0.001092,0.000000,0.000000 172.8081,-20.0689,-107.53,-14.96,False UCAC4 350-079195,16.12888739,-20.0043617,12.57,11.93,11.58,0.0,0,,16.15215312,-20.0688788,5.39,5.29,0,0,0 2158,Tietjen,17.31,22.376,2.8414,0,0,3.223,-7.18,,2.0,0 0,312.2589,2024,2,8,101.5720,187.2352,1.5858,0.18012,3.07144,2.51820,11.83,5.0,0.15 1.093,0.0197,0.0010,100,0.0010,Known errors,1.06,0,-1,-1 20240208_079195,60138.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org