IOTA/IOTA-ES occultation update for (101955) Bennu / TYC 7887-01195-1 event on 2024 May 08, 21:32 UT Visible from Summary ------- On 2024 May 08 UT, the 0.299793339093087 km diameter asteroid (101955) Bennu will occult a 9.6 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 10.82 mag to 20.43 mag (the magnitude of the asteroid) for at most 0.070 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: 37 * date and approx. time of event: 2024 May 08, 21:13 - 2024 May 08, 21:51 * geocentric midpoint of event [JD]: 2460439.39752904 * magnitude of target star: 9.61 * magnitude drop [mag]: 10.82 * estimated maximum duration [s]: 0.070 * Moon: 1 % sunlit, 152° distance * Sun: 142° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 0 * 1 sigma uncertainty interval [path widths]: +/- 1.78 * 1 sigma uncertainty interval [seconds]: +/- 0.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.002, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.002", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 4.9892 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7887-01195-1 by 101955 Bennu on 2024 May 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 -44 45 33 21 51 24.9 1 152 0 -44 45 20 -44 45 45 -44 44 34 -44 46 31 .... - 75 0 0 -46 8 15 21 51 23.4 3 152 -2 -46 8 2 -46 8 28 -46 7 16 -46 9 14 0.39 - 74 0 0 -47 28 49 21 51 21.0 4 151 -3 -47 28 36 -47 29 2 -47 27 50 -47 29 47 0.41 - 73 0 0 -48 47 9 21 51 17.7 6 150 -4 -48 46 57 -48 47 22 -48 46 11 -48 48 8 0.42 - 72 0 0 -50 3 13 21 51 13.7 7 149 -5 -50 3 1 -50 3 26 -50 2 15 -50 4 12 0.43 - 71 0 0 -51 16 58 21 51 8.9 9 149 -6 -51 16 46 -51 17 11 -51 16 0 -51 17 56 0.43 - 70 0 0 -52 28 22 21 51 3.5 10 148 -7 -52 28 10 -52 28 35 -52 27 24 -52 29 20 0.44 - 69 0 0 -53 37 24 21 50 57.5 11 147 -8 -53 37 12 -53 37 37 -53 36 27 -53 38 22 0.44 - 68 0 0 -54 44 4 21 50 51.0 12 146 -9 -54 43 51 -54 44 16 -54 43 7 -54 45 1 0.45 - 67 0 0 -55 48 22 21 50 44.2 14 145 -10 -55 48 10 -55 48 34 -55 47 25 -55 49 19 0.45 - 66 0 0 -56 50 19 21 50 37.0 15 145 -10 -56 50 7 -56 50 32 -56 49 23 -56 51 16 0.45 - 65 0 0 -57 49 58 21 50 29.5 16 144 -11 -57 49 46 -57 50 10 -57 49 2 -57 50 54 0.46 - 64 0 0 -58 47 19 21 50 21.8 17 143 -12 -58 47 7 -58 47 31 -58 46 24 -58 48 14 0.46 - 63 0 0 -59 42 26 21 50 13.9 18 142 -13 -59 42 14 -59 42 38 -59 41 31 -59 43 21 0.46 - 62 0 0 -60 35 21 21 50 5.8 19 141 -13 -60 35 9 -60 35 33 -60 34 27 -60 36 15 0.46 - 61 0 0 -61 26 8 21 49 57.7 20 140 -14 -61 25 56 -61 26 19 -61 25 14 -61 27 1 0.46 - 60 0 0 -62 14 49 21 49 49.6 21 139 -15 -62 14 38 -62 15 1 -62 13 56 -62 15 43 0.47 - 59 0 0 -63 1 30 21 49 41.4 22 138 -15 -63 1 18 -63 1 41 -63 0 37 -63 2 22 0.47 - 58 0 0 -63 46 13 21 49 33.2 22 137 -16 -63 46 2 -63 46 24 -63 45 21 -63 47 5 0.47 - 57 0 0 -64 29 3 21 49 25.0 23 136 -16 -64 28 51 -64 29 14 -64 28 12 -64 29 54 0.47 - 56 0 0 -65 10 3 21 49 16.9 24 135 -17 -65 9 52 -65 10 14 -65 9 12 -65 10 53 0.47 - 55 0 0 -65 49 18 21 49 8.9 25 134 -17 -65 49 7 -65 49 29 -65 48 28 -65 50 8 0.48 - 54 0 0 -66 26 51 21 49 1.0 26 133 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21 21 11.7 46 241 -10 -29 38 45 -29 39 7 -29 38 6 -29 39 46 0.47 128 0 0 -28 17 9 21 20 43.8 45 240 -9 -28 16 59 -28 17 20 -28 16 20 -28 17 59 0.47 129 0 0 -26 55 21 21 20 16.5 43 239 -8 -26 55 10 -26 55 32 -26 54 32 -26 56 10 0.47 130 0 0 -25 33 37 21 19 49.9 42 238 -7 -25 33 26 -25 33 48 -25 32 49 -25 34 26 0.46 131 0 0 -24 12 3 21 19 23.9 40 237 -5 -24 11 53 -24 12 13 -24 11 15 -24 12 51 0.46 132 0 0 -22 50 44 21 18 58.5 39 236 -4 -22 50 33 -22 50 54 -22 49 56 -22 51 31 0.46 133 0 0 -21 29 45 21 18 34.0 38 235 -3 -21 29 35 -21 29 56 -21 28 58 -21 30 32 0.46 134 0 0 -20 9 13 21 18 10.3 36 234 -2 -20 9 2 -20 9 23 -20 8 26 -20 9 59 0.46 135 0 0 -18 49 11 21 17 47.4 35 234 -1 -18 49 1 -18 49 21 -18 48 25 -18 49 57 0.46 136 0 0 -17 29 44 21 17 25.3 33 233 1 -17 29 34 -17 29 54 -17 28 58 -17 30 29 0.46 137 0 0 -16 10 57 21 17 4.2 32 232 2 -16 10 48 -16 11 7 -16 10 12 -16 11 42 0.46 138 0 0 -14 52 55 21 16 44.1 30 232 3 -14 52 45 -14 53 5 -14 52 11 -14 53 40 0.45 139 0 0 -13 35 42 21 16 24.8 29 231 4 -13 35 32 -13 35 51 -13 34 58 -13 36 26 0.45 140 0 0 -12 19 20 21 16 6.6 27 231 6 -12 19 11 -12 19 30 -12 18 37 -12 20 4 0.45 141 0 0 -11 3 56 21 15 49.3 26 230 7 -11 3 46 -11 4 5 -11 3 12 -11 4 39 0.45 142 0 0 - 9 49 30 21 15 33.1 24 230 8 - 9 49 21 - 9 49 40 - 9 48 48 - 9 50 13 0.45 143 0 0 - 8 36 8 21 15 17.8 23 230 9 - 8 35 59 - 8 36 17 - 8 35 26 - 8 36 50 0.46 144 0 0 - 7 23 52 21 15 3.6 21 230 11 - 7 23 43 - 7 24 1 - 7 23 10 - 7 24 33 0.46 145 0 0 - 6 12 44 21 14 50.4 20 229 12 - 6 12 35 - 6 12 53 - 6 12 3 - 6 13 25 0.46 146 0 0 - 5 2 48 21 14 38.2 18 229 13 - 5 2 39 - 5 2 57 - 5 2 7 - 5 3 29 0.46 147 0 0 - 3 54 5 21 14 27.0 17 229 14 - 3 53 56 - 3 54 14 - 3 53 25 - 3 54 45 0.46 148 0 0 - 2 46 38 21 14 16.8 15 229 16 - 2 46 29 - 2 46 47 - 2 45 58 - 2 47 18 0.46 149 0 0 - 1 40 28 21 14 7.5 14 229 17 - 1 40 20 - 1 40 37 - 1 39 49 - 1 41 8 0.47 150 0 0 - 0 35 38 21 13 59.3 13 229 18 - 0 35 29 - 0 35 46 - 0 34 59 - 0 36 17 0.47 151 0 0 0 27 52 21 13 52.0 11 229 20 0 28 1 0 27 44 0 28 31 0 27 14 0.48 152 0 0 1 30 1 21 13 45.6 10 229 21 1 30 9 1 29 53 1 30 39 1 29 23 0.48 153 0 0 2 30 47 21 13 40.1 8 229 22 2 30 55 2 30 39 2 31 25 2 30 9 0.49 154 0 0 3 30 10 21 13 35.5 7 229 23 3 30 18 3 30 1 3 30 47 3 29 32 0.50 155 0 0 4 28 8 21 13 31.8 6 229 24 4 28 16 4 28 0 4 28 45 4 27 31 0.52 156 0 0 5 24 42 21 13 29.0 4 229 26 5 24 50 5 24 34 5 25 19 5 24 6 0.55 157 0 0 6 19 51 21 13 26.9 3 229 27 6 19 59 6 19 43 6 20 27 6 19 15 0.60 158 0 0 7 13 36 21 13 25.7 1 229 28 7 13 44 7 13 28 7 14 12 7 13 0 0.75 159 0 0 8 5 55 21 13 25.2 0 229 29 8 6 3 8 5 48 8 6 31 8 5 20 2.95 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 7887-01195-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 24 53.0516 DE: -40 12 00.826 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 24 53.0517 DE: -40 12 00.827 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.6 * B mag [mag]: 10.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (101955) Bennu asteroid class: approx. diameter [km]: 0 approx. diameter ["]: 0.001 distance from Earth [AU]: 0.40270 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: ORX_merged_DE424 date of fit: 2021 Jan 07 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): 0.002", 0.002", 90° remarks: * orbital elements for (101955)Bennu : Mean anomaly = 164.6199344706 deg Arg. of pericenter = 66.3705638906 deg Long. of node = 1.9867414979 deg Inclination = 6.0331044480 deg Eccentricity = 0.2037415090 Semimajor axis = 1.1259595789 AU Perihelion dist = 0.8965548753 AU Mag: H = 20.21, G = -0.03 Epoch of elements : MJD 60438.89752929 TDT (2024 May 08.8975) ------ occelmnt file for Occult BEGIN ----------------------------------- ORX_merged_DE4242021Jan07,0.07,2024,5,8,21.540697,0.274463,-0.357652,-2.233969,-1.714529,-0.001911,0.000951,0.000001,0.000000 71.3411,-40.2221,-143.99,17.41,False TYC 7887-01195-1,17.41473653,-40.2002294,10.18,9.61,9.30,0.1,0,,17.44335226,-40.2220569,10.82,10.68,0,0,0 101955,Bennu,20.43,0.329,0.4027,0,0,-4.263,-37.43,,0.0,0 0,163.8795,2024,5,8,66.3706,1.9867,6.0331,0.20374,1.12596,0.89655,20.21,5.0,-0.03 2.787,0.0020,0.0020,90,0.0020,Known errors,0.93,0,-1,-1 20240508_1195-1,60139.33 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 07:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org