IOTA/IOTA-ES occultation update for (12847) 1997 NQ2 / TYC 7295-00103-1 event on 2024 Sep 10, 23:18 UT Visible from Summary ------- On 2024 Sep 10 UT, the 13.2107822262337 km diameter asteroid (12847) 1997 NQ2 will occult a 10.6 mag star in the constellation Centaurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.59 mag to 19.15 mag (the magnitude of the asteroid) for at most 0.360 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 Sep 10, 23:16 - 2024 Sep 10, 23:20 * geocentric midpoint of event [JD]: 2460564.47108862 * magnitude of target star: 10.56 * magnitude drop [mag]: 8.59 * estimated maximum duration [s]: 0.360 * Moon: 46 % sunlit, 31° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.002", 91°) * approx speed of asteroid's shadow [km/s]: 37.0810 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7295-00103-1 by 12847 1997 NQ2 on 2024 Sep 10 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 125 0 0 -32 22 59 23 16 6.8 1 128 18 -32 28 56 -32 17 2 -32 32 39 -32 13 20 .... 126 0 0 -33 3 48 23 16 6.9 2 128 19 -33 9 46 -32 57 50 -33 13 30 -32 54 7 0.68 127 0 0 -33 44 45 23 16 7.1 3 127 19 -33 50 45 -33 38 46 -33 54 30 -33 35 1 0.73 128 0 0 -34 25 49 23 16 7.3 4 126 20 -34 31 51 -34 19 48 -34 35 37 -34 16 3 0.75 129 0 0 -35 6 58 23 16 7.7 5 126 20 -35 13 1 -35 0 55 -35 16 48 -34 57 9 0.76 130 0 0 -35 48 9 23 16 8.0 6 125 21 -35 54 14 -35 42 5 -35 58 1 -35 38 19 0.76 131 0 0 -36 29 22 23 16 8.5 7 125 21 -36 35 28 -36 23 17 -36 39 16 -36 19 29 0.77 132 0 0 -37 10 34 23 16 9.0 8 124 22 -37 16 41 -37 4 28 -37 20 31 -37 0 40 0.77 133 0 0 -37 51 44 23 16 9.6 9 123 22 -37 57 52 -37 45 37 -38 1 42 -37 41 47 0.77 134 0 0 -38 32 50 23 16 10.3 10 123 23 -38 38 59 -38 26 41 -38 42 50 -38 22 51 0.78 135 0 0 -39 13 49 23 16 11.0 11 122 23 -39 20 0 -39 7 40 -39 23 51 -39 3 49 0.78 136 0 0 -39 54 41 23 16 11.8 12 121 24 -40 0 52 -39 48 30 -40 4 44 -39 44 39 0.78 137 0 0 -40 35 23 23 16 12.7 13 121 24 -40 41 35 -40 29 11 -40 45 28 -40 25 20 0.78 138 0 0 -41 15 54 23 16 13.6 14 120 24 -41 22 7 -41 9 41 -41 26 0 -41 5 49 0.78 139 0 0 -41 56 11 23 16 14.6 15 119 25 -42 2 25 -41 49 58 -42 6 19 -41 46 6 0.78 140 0 0 -42 36 14 23 16 15.6 16 119 25 -42 42 28 -42 30 0 -42 46 23 -42 26 7 0.78 141 0 0 -43 16 0 23 16 16.7 17 118 25 -43 22 15 -43 9 46 -43 26 10 -43 5 53 0.78 142 0 0 -43 55 28 23 16 17.9 18 117 25 -44 1 44 -43 49 14 -44 5 39 -43 45 20 0.78 143 0 0 -44 34 37 23 16 19.1 19 116 25 -44 40 53 -44 28 22 -44 44 47 -44 24 28 0.79 144 0 0 -45 13 24 23 16 20.3 20 116 26 -45 19 40 -45 7 9 -45 23 35 -45 3 15 0.79 145 0 0 -45 51 48 23 16 21.5 21 115 26 -45 58 5 -45 45 33 -46 2 0 -45 41 39 0.79 146 0 0 -46 29 49 23 16 22.9 22 114 26 -46 36 5 -46 23 33 -46 40 0 -46 19 39 0.79 147 0 0 -47 7 24 23 16 24.2 23 113 26 -47 13 40 -47 1 8 -47 17 35 -46 57 14 0.79 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25 24 -44 41 50 -44 21 30 0.82 - 30 0 0 -43 52 29 23 20 25.4 19 244 -38 -43 58 44 -43 46 14 -44 2 39 -43 42 20 0.82 - 29 0 0 -43 12 59 23 20 26.6 18 243 -39 -43 19 13 -43 6 44 -43 23 8 -43 2 51 0.83 - 28 0 0 -42 33 10 23 20 27.7 17 242 -40 -42 39 25 -42 26 57 -42 43 19 -42 23 4 0.83 - 27 0 0 -41 53 6 23 20 28.8 16 241 -41 -41 59 20 -41 46 53 -42 3 13 -41 43 0 0.83 - 26 0 0 -41 12 46 23 20 29.8 15 241 -42 -41 19 0 -41 6 34 -41 22 53 -41 2 42 0.83 - 25 0 0 -40 32 14 23 20 30.8 14 240 -43 -40 38 26 -40 26 3 -40 42 19 -40 22 11 0.84 - 24 0 0 -39 51 31 23 20 31.7 13 239 -44 -39 57 42 -39 45 20 -40 1 34 -39 41 29 0.84 - 23 0 0 -39 10 37 23 20 32.6 12 239 -45 -39 16 48 -39 4 28 -39 20 39 -39 0 37 0.85 - 22 0 0 -38 29 37 23 20 33.4 11 238 -46 -38 35 46 -38 23 28 -38 39 37 -38 19 38 0.85 - 21 0 0 -37 48 30 23 20 34.1 10 237 -47 -37 54 38 -37 42 22 -37 58 28 -37 38 33 0.86 - 20 0 0 -37 7 19 23 20 34.7 9 237 -48 -37 13 26 -37 1 13 -37 17 16 -36 57 25 0.87 - 19 0 0 -36 26 6 23 20 35.3 8 236 -49 -36 32 12 -36 20 1 -36 36 0 -36 16 14 0.88 - 18 0 0 -35 44 53 23 20 35.9 7 235 -50 -35 50 57 -35 38 49 -35 54 45 -35 35 2 0.89 - 17 0 0 -35 3 41 23 20 36.3 6 235 -51 -35 9 43 -34 57 38 -35 13 30 -34 53 52 0.91 - 16 0 0 -34 22 32 23 20 36.7 5 234 -52 -34 28 33 -34 16 31 -34 32 19 -34 12 46 0.94 - 15 0 0 -33 41 28 23 20 37.0 4 234 -53 -33 47 28 -33 35 28 -33 51 13 -33 31 44 0.98 - 14 0 0 -33 0 30 23 20 37.2 2 233 -54 -33 6 29 -32 54 32 -33 10 13 -32 50 49 1.07 - 13 0 0 -32 19 41 23 20 37.4 1 233 -55 -32 25 38 -32 13 45 -32 29 21 -32 10 3 1.28 - 12 0 0 -31 39 3 23 20 37.4 0 232 -56 -31 44 58 -31 33 8 -31 48 40 -31 29 27 3.09 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 7295-00103-1 * constellation : Centaurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 25 25.8733 DE: -31 44 12.319 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 25 25.8732 DE: -31 44 12.319 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.6 * B mag [mag]: 11.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (12847) 1997 NQ2 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.98120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#41 date of fit: 2023 Apr 27 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): 0.022", 0.002", 91.428° remarks: * orbital elements for (12847)1997 NQ2 : Mean anomaly = 50.4871754971 deg Arg. of pericenter = 255.3751797032 deg Long. of node = 281.3730386507 deg Inclination = 29.7731905411 deg Eccentricity = 0.1348648182 Semimajor axis = 2.7908084684 AU Perihelion dist = 2.4144265918 AU Mag: H = 13.74, G = 0.15 Epoch of elements : MJD 60563.97108862 TDT (2024 Sep 10.9711) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#412023Apr27,0.36,2024,9,10,23.306127,0.003519,-0.615972,20.929150,0.132797,0.004067,-0.002373,-0.000001,0.000000 -123.3510,-31.8488,-170.43,4.46,False TYC 7295-00103-1,14.42385373,-31.7367556,11.10,10.56,10.27,0.1,0,,14.44792835,-31.8487527,8.59,8.43,0,0,0 12847,1997 NQ2,19.15,13.427,2.9812,0,0,4.846,0.39,,1.2,0 0,50.2819,2024,9,10,255.3752,281.3730,29.7732,0.13486,2.79081,2.41443,13.74,5.0,0.15 1.312,0.0220,0.0018,91,0.0019,Known errors,1.18,0,-1,-1 20240910_0103-1,60140.55 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org