IOTA/IOTA-ES occultation update for (1641) Tana / UCAC4 301-258360 event on 2024 Mar 06, 15:04 UT Visible from Summary ------- On 2024 Mar 06 UT, the 25.1452872737609 km diameter asteroid (1641) Tana will occult a 8.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.36 mag to 16.23 mag (the magnitude of the asteroid) for at most 0.780 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 Mar 06, 15:01 - 2024 Mar 06, 15:07 * geocentric midpoint of event [JD]: 2460376.12789063 * magnitude of target star: 8.87 * magnitude drop [mag]: 7.36 * estimated maximum duration [s]: 0.780 * Moon: 20 % sunlit, 7° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 76°) * approx speed of asteroid's shadow [km/s]: 32.7876 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 301-258360 by 1641 Tana on 2024 Mar 6 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 -179 0 0 19 47 45 15 1 18.5 1 122 -45 19 38 30 19 57 1 19 34 5 20 1 27 .... -178 0 0 19 12 37 15 1 18.6 2 122 -44 19 3 23 19 21 51 18 58 59 19 26 17 -0.23 -177 0 0 18 37 43 15 1 18.7 3 123 -44 18 28 31 18 46 56 18 24 7 18 51 21 -0.35 -176 0 0 18 3 4 15 1 19.0 4 123 -43 17 53 54 18 12 15 17 49 31 18 16 39 -0.40 -175 0 0 17 28 41 15 1 19.3 5 123 -42 17 19 33 17 37 51 17 15 10 17 42 14 -0.43 -174 0 0 16 54 36 15 1 19.7 6 124 -41 16 45 29 17 3 44 16 41 8 17 8 7 -0.45 -173 0 0 16 20 49 15 1 20.2 7 124 -40 16 11 44 16 29 56 16 7 23 16 34 17 -0.46 -172 0 0 15 47 22 15 1 20.8 8 124 -39 15 38 18 15 56 26 15 33 58 16 0 47 -0.47 -171 0 0 15 14 15 15 1 21.4 9 124 -38 15 5 13 15 23 17 15 0 54 15 27 38 -0.48 -170 0 0 14 41 29 15 1 22.2 10 125 -38 14 32 29 14 50 30 14 28 10 14 54 49 -0.49 -169 0 0 14 9 5 15 1 23.0 12 125 -37 14 0 7 14 18 5 13 55 49 14 22 23 -0.49 -168 0 0 13 37 5 15 1 23.9 13 125 -36 13 28 8 13 46 2 13 23 51 13 50 20 -0.49 -167 0 0 13 5 28 15 1 24.9 14 126 -35 12 56 33 13 14 24 12 52 18 13 18 41 -0.50 -166 0 0 12 34 17 15 1 25.9 15 126 -34 12 25 24 12 43 11 12 21 9 12 47 27 -0.50 -165 0 0 12 3 31 15 1 27.0 16 126 -33 11 54 39 12 12 23 11 50 25 12 16 38 -0.50 -164 0 0 11 33 11 15 1 28.3 17 126 -32 11 24 21 11 42 1 11 20 8 11 46 15 -0.51 -163 0 0 11 3 18 15 1 29.5 18 127 -31 10 54 31 11 12 7 10 50 18 11 16 20 -0.51 -162 0 0 10 33 53 15 1 30.9 19 127 -30 10 25 7 10 42 40 10 20 56 10 46 53 -0.51 -161 0 0 10 4 57 15 1 32.3 20 127 -29 9 56 13 10 13 42 9 52 2 10 17 54 -0.51 -160 0 0 9 36 30 15 1 33.8 21 127 -28 9 27 47 9 45 13 9 23 37 9 49 24 -0.51 -159 0 0 9 8 32 15 1 35.4 22 128 -27 8 59 51 9 17 13 8 55 42 9 21 23 -0.51 -158 0 0 8 41 4 15 1 37.1 24 128 -26 8 32 26 8 49 44 8 28 17 8 53 53 -0.51 -157 0 0 8 14 8 15 1 38.8 25 128 -25 8 5 31 8 22 46 8 1 23 8 26 54 -0.52 -156 0 0 7 47 42 15 1 40.6 26 128 -24 7 39 7 7 56 18 7 35 0 8 0 26 -0.52 -155 0 0 7 21 49 15 1 42.4 27 129 -23 7 13 15 7 30 23 7 9 9 7 34 30 -0.52 -154 0 0 6 56 27 15 1 44.3 28 129 -22 6 47 55 7 5 0 6 43 50 7 9 6 -0.52 -153 0 0 6 31 38 15 1 46.3 29 129 -21 6 23 8 6 40 9 6 19 4 6 44 14 -0.52 -152 0 0 6 7 22 15 1 48.3 30 130 -20 5 58 54 6 15 52 5 54 50 6 19 56 -0.52 -151 0 0 5 43 40 15 1 50.4 31 130 -19 5 35 13 5 52 7 5 31 10 5 56 11 -0.52 -150 0 0 5 20 31 15 1 52.6 32 130 -18 5 12 5 5 28 57 5 8 4 5 33 0 -0.52 -149 0 0 4 57 56 15 1 54.8 33 130 -17 4 49 32 5 6 20 4 45 31 5 10 22 -0.52 -148 0 0 4 35 55 15 1 57.1 34 131 -16 4 27 33 4 44 18 4 23 33 4 48 20 -0.52 -147 0 0 4 14 30 15 1 59.4 35 131 -15 4 6 9 4 22 51 4 2 9 4 26 51 -0.52 -146 0 0 3 53 38 15 2 1.8 36 132 -14 3 45 19 4 1 58 3 41 20 4 5 58 -0.53 -145 0 0 3 33 22 15 2 4.2 37 132 -13 3 25 5 3 41 41 3 21 7 3 45 40 -0.53 -144 0 0 3 13 42 15 2 6.7 38 132 -11 3 5 25 3 21 59 3 1 28 3 25 57 -0.53 -143 0 0 2 54 37 15 2 9.2 39 133 -10 2 46 22 3 2 52 2 42 25 3 6 50 -0.53 -142 0 0 2 36 7 15 2 11.8 40 133 -9 2 27 53 2 44 21 2 23 57 2 48 18 -0.53 -141 0 0 2 18 13 15 2 14.4 41 134 -8 2 10 1 2 26 26 2 6 5 2 30 23 -0.53 -140 0 0 2 0 56 15 2 17.0 42 134 -7 1 52 45 2 9 7 1 48 50 2 13 3 -0.53 -139 0 0 1 44 14 15 2 19.7 42 135 -6 1 36 4 1 52 24 1 32 10 1 56 20 -0.53 -138 0 0 1 28 9 15 2 22.5 43 135 -5 1 20 0 1 36 18 1 16 6 1 40 12 -0.53 -137 0 0 1 12 40 15 2 25.3 44 136 -4 1 4 32 1 20 48 1 0 39 1 24 42 -0.53 -136 0 0 0 57 47 15 2 28.1 45 136 -3 0 49 41 1 5 54 0 45 48 1 9 47 -0.53 -135 0 0 0 43 31 15 2 31.0 46 137 -2 0 35 26 0 51 37 0 31 34 0 55 30 -0.53 -134 0 0 0 29 52 15 2 33.9 47 137 -1 0 21 47 0 37 56 0 17 56 0 41 49 -0.53 -133 0 0 0 16 49 15 2 36.8 48 138 0 0 8 46 0 24 53 0 4 54 0 28 45 -0.53 -132 0 0 0 4 23 15 2 39.7 49 139 1 - 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81 0 0 3 8 50 15 5 29.5 51 210 52 3 0 34 3 17 7 2 56 36 3 21 5 -0.54 - 80 0 0 3 28 25 15 5 32.7 50 211 53 3 20 7 3 36 44 3 16 9 3 40 43 -0.54 - 79 0 0 3 48 36 15 5 35.8 50 212 54 3 40 17 3 56 56 3 36 18 4 0 56 -0.54 - 78 0 0 4 9 22 15 5 38.9 49 213 54 4 1 2 4 17 44 3 57 2 4 21 44 -0.54 - 77 0 0 4 30 44 15 5 42.0 48 214 55 4 22 21 4 39 7 4 18 21 4 43 8 -0.54 - 76 0 0 4 52 40 15 5 45.1 47 215 56 4 44 16 5 1 5 4 40 15 5 5 6 -0.54 - 75 0 0 5 15 11 15 5 48.1 46 215 57 5 6 46 5 23 37 5 2 44 5 27 40 -0.54 - 74 0 0 5 38 17 15 5 51.0 45 216 58 5 29 50 5 46 45 5 25 47 5 50 48 -0.54 - 73 0 0 6 1 57 15 5 54.0 44 217 59 5 53 28 6 10 26 5 49 25 6 14 30 -0.54 - 72 0 0 6 26 10 15 5 56.9 43 217 59 6 17 40 6 34 42 6 13 36 6 38 47 -0.54 - 71 0 0 6 50 58 15 5 59.7 42 218 60 6 42 25 6 59 30 6 38 21 7 3 36 -0.54 - 70 0 0 7 16 18 15 6 2.5 41 219 61 7 7 44 7 24 52 7 3 38 7 28 59 -0.54 - 69 0 0 7 42 10 15 6 5.3 41 219 62 7 33 35 7 50 47 7 29 28 7 54 54 -0.54 - 68 0 0 8 8 35 15 6 8.0 40 220 62 7 59 58 8 17 13 7 55 50 8 21 22 -0.54 - 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54 0 0 15 9 22 15 6 39.9 25 226 67 15 0 19 15 18 25 14 56 0 15 22 46 -0.54 - 53 0 0 15 42 35 15 6 41.7 24 227 67 15 33 31 15 51 40 15 29 11 15 56 2 -0.54 - 52 0 0 16 16 9 15 6 43.4 23 227 67 16 7 3 16 25 16 16 2 42 16 29 38 -0.54 - 51 0 0 16 50 3 15 6 45.0 22 227 67 16 40 55 16 59 11 16 36 33 17 3 34 -0.54 - 50 0 0 17 24 15 15 6 46.6 21 228 67 17 15 6 17 33 26 17 10 43 17 37 49 -0.54 - 49 0 0 17 58 46 15 6 48.0 20 228 66 17 49 35 18 7 57 17 45 11 18 12 22 -0.54 - 48 0 0 18 33 32 15 6 49.4 18 228 66 18 24 20 18 42 46 18 19 56 18 47 11 -0.54 - 47 0 0 19 8 34 15 6 50.8 17 229 65 18 59 20 19 17 49 18 54 55 19 22 16 -0.54 - 46 0 0 19 43 51 15 6 52.0 16 229 65 19 34 35 19 53 8 19 30 10 19 57 34 -0.54 - 45 0 0 20 19 21 15 6 53.2 15 230 64 20 10 4 20 28 39 20 5 37 20 33 6 -0.54 - 44 0 0 20 55 2 15 6 54.2 14 230 64 20 45 44 21 4 22 20 41 17 21 8 50 -0.54 - 43 0 0 21 30 55 15 6 55.2 13 230 63 21 21 35 21 40 16 21 17 7 21 44 45 -0.54 - 42 0 0 22 6 57 15 6 56.2 12 231 63 21 57 36 22 16 19 21 53 7 22 20 49 -0.54 - 41 0 0 22 43 7 15 6 57.0 11 231 62 22 33 45 22 52 31 22 29 16 22 57 1 -0.54 - 40 0 0 23 19 25 15 6 57.7 10 232 61 23 10 1 23 28 49 23 5 31 23 33 20 -0.54 - 39 0 0 23 55 48 15 6 58.4 9 232 60 23 46 23 24 5 14 23 41 53 24 9 45 -0.54 - 38 0 0 24 32 16 15 6 59.0 7 232 60 24 22 50 24 41 42 24 18 19 24 46 14 -0.54 - 37 0 0 25 8 46 15 6 59.5 6 233 59 24 59 19 25 18 14 24 54 48 25 22 47 -0.54 - 36 0 0 25 45 19 15 6 59.9 5 233 58 25 35 51 25 54 48 25 31 20 25 59 21 -0.55 - 35 0 0 26 21 53 15 7 0.3 4 234 57 26 12 24 26 31 22 26 7 52 26 35 56 -0.55 - 34 0 0 26 58 25 15 7 0.5 3 234 56 26 48 56 27 7 56 26 44 23 27 12 30 -0.56 - 33 0 0 27 34 56 15 7 0.7 2 235 56 27 25 26 27 44 28 27 20 53 27 49 2 -0.57 - 32 0 0 28 11 24 15 7 0.8 1 235 55 28 1 53 28 20 56 27 57 20 28 25 30 -0.61 - 31 0 0 .. .. .... .. .. .. .. .. .. 28 38 15 .. .. .. 28 33 42 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 301-258360 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 13 19.8597 DE: -29 49 45.230 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 13 19.8598 DE: -29 49 45.230 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 8.9 * B mag [mag]: 9.6 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1641) Tana asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.22440 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): 0.016", 0.001", 76.3° remarks: * orbital elements for (1641)Tana : Mean anomaly = 305.6098485111 deg Arg. of pericenter = 0.8025863152 deg Long. of node = 331.3740651300 deg Inclination = 9.3195759669 deg Eccentricity = 0.0980024227 Semimajor axis = 3.0203559600 AU Perihelion dist = 2.7243537585 AU Mag: H = 10.48, G = 0.15 Epoch of elements : MJD 60375.62789037 TDT (2024 Mar 06.6279) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,0.78,2024,3,6,15.069375,-0.042359,0.472020,18.431333,1.663490,-0.005006,-0.001028,-0.000001,0.000000 -102.1668,-29.7888,-43.27,-5.31,False UCAC4 301-258360,19.22218321,-29.8292306,9.60,8.87,8.48,0.2,0,,19.24742450,-29.7887617,7.36,7.31,0,0,0 1641,Tana,16.23,25.613,3.2244,0,0,3.862,4.54,,2.4,0 0,305.4920,2024,3,6,0.8026,331.3741,9.3196,0.09800,3.02036,2.72435,10.48,5.0,0.15 1.239,0.0163,0.0010,76,0.0026,Known errors,2.02,0,-1,-1 20240306_258360,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org