IOTA/IOTA-ES occultation update for (47139) 1999 GN9 / HIP 114005 event on 2024 Dec 22, 13:02 UT Visible from Summary ------- On 2024 Dec 22 UT, the 16.4830670367268 km diameter asteroid (47139) 1999 GN9 will occult a 6.2 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 12.47 mag to 18.62 mag (the magnitude of the asteroid) for at most 0.810 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: 77 * date and approx. time of event: 2024 Dec 22, 12:57 - 2024 Dec 22, 13:07 * geocentric midpoint of event [JD]: 2460667.04348784 * magnitude of target star: 6.15 * magnitude drop [mag]: 12.47 * estimated maximum duration [s]: 0.810 * Moon: 54 % sunlit, 170° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.72 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 40°) * approx speed of asteroid's shadow [km/s]: 21.3635 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 114005 by 47139 1999 GN9 on 2024 Dec 22 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 - 29 0 0 -10 48 36 12 58 0.5 0 89 71 -10 53 41 -10 43 30 -11 1 3 -10 36 7 .... - 28 0 0 -10 46 40 12 58 0.6 1 88 72 -10 51 46 -10 41 34 -10 59 8 -10 34 11 -0.24 - 27 0 0 -10 44 8 12 58 0.8 2 88 73 -10 49 14 -10 39 2 -10 56 36 -10 31 39 -0.32 - 26 0 0 -10 40 59 12 58 1.0 3 88 73 -10 46 5 -10 35 53 -10 53 27 -10 28 29 -0.35 - 25 0 0 -10 37 13 12 58 1.4 4 88 74 -10 42 19 -10 32 6 -10 49 42 -10 24 43 -0.37 - 24 0 0 -10 32 50 12 58 1.8 5 88 74 -10 37 56 -10 27 43 -10 45 19 -10 20 19 -0.38 - 23 0 0 -10 27 50 12 58 2.3 6 87 75 -10 32 56 -10 22 43 -10 40 20 -10 15 18 -0.38 - 22 0 0 -10 22 13 12 58 3.0 7 87 75 -10 27 20 -10 17 5 -10 34 44 -10 9 40 -0.39 - 21 0 0 -10 15 58 12 58 3.7 8 87 75 -10 21 6 -10 10 50 -10 28 30 -10 3 25 -0.39 - 20 0 0 -10 9 6 12 58 4.6 9 87 76 -10 14 14 -10 3 58 -10 21 40 - 9 56 32 -0.40 - 19 0 0 -10 1 37 12 58 5.5 10 87 76 -10 6 46 - 9 56 29 -10 14 11 - 9 49 2 -0.40 - 18 0 0 - 9 53 31 12 58 6.5 11 87 76 - 9 58 40 - 9 48 22 -10 6 6 - 9 40 54 -0.40 - 17 0 0 - 9 44 47 12 58 7.6 12 86 76 - 9 49 56 - 9 39 37 - 9 57 23 - 9 32 9 -0.40 - 16 0 0 - 9 35 25 12 58 8.9 13 86 76 - 9 40 35 - 9 30 15 - 9 48 3 - 9 22 46 -0.40 - 15 0 0 - 9 25 25 12 58 10.2 14 86 76 - 9 30 36 - 9 20 15 - 9 38 4 - 9 12 45 -0.40 - 14 0 0 - 9 14 48 12 58 11.6 15 86 76 - 9 19 59 - 9 9 37 - 9 27 28 - 9 2 6 -0.41 - 13 0 0 - 9 3 33 12 58 13.1 16 86 75 - 9 8 44 - 8 58 21 - 9 16 15 - 8 50 49 -0.41 - 12 0 0 - 8 51 39 12 58 14.8 17 86 75 - 8 56 51 - 8 46 27 - 9 4 23 - 8 38 54 -0.41 - 11 0 0 - 8 39 8 12 58 16.5 18 86 75 - 8 44 20 - 8 33 54 - 8 51 53 - 8 26 21 -0.41 - 10 0 0 - 8 25 58 12 58 18.3 19 86 74 - 8 31 11 - 8 20 44 - 8 38 45 - 8 13 9 -0.41 - 9 0 0 - 8 12 9 12 58 20.2 20 85 74 - 8 17 24 - 8 6 55 - 8 24 58 - 7 59 19 -0.41 - 8 0 0 - 7 57 43 12 58 22.3 21 85 73 - 8 2 58 - 7 52 28 - 8 10 34 - 7 44 51 -0.41 - 7 0 0 - 7 42 38 12 58 24.4 22 85 72 - 7 47 54 - 7 37 22 - 7 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-0.42 6 0 0 - 3 27 41 12 59 1.7 35 86 61 - 3 33 10 - 3 22 11 - 3 41 6 - 3 14 14 -0.42 7 0 0 - 3 3 32 12 59 5.3 37 86 60 - 3 9 2 - 2 58 1 - 3 17 0 - 2 50 2 -0.42 8 0 0 - 2 38 45 12 59 9.0 38 86 59 - 2 44 16 - 2 33 13 - 2 52 16 - 2 25 12 -0.42 9 0 0 - 2 13 19 12 59 12.8 39 86 58 - 2 18 52 - 2 7 46 - 2 26 53 - 1 59 43 -0.42 10 0 0 - 1 47 15 12 59 16.8 40 87 57 - 1 52 49 - 1 41 40 - 2 0 52 - 1 33 36 -0.42 11 0 0 - 1 20 33 12 59 20.8 41 87 56 - 1 26 8 - 1 14 57 - 1 34 13 - 1 6 51 -0.42 12 0 0 - 0 53 13 12 59 24.9 42 87 55 - 0 58 50 - 0 47 36 - 1 6 57 - 0 39 27 -0.42 13 0 0 - 0 25 15 12 59 29.2 43 88 54 - 0 30 53 - 0 19 37 - 0 39 2 - 0 11 26 -0.42 14 0 0 0 3 20 12 59 33.5 44 88 53 - 0 2 20 0 9 0 - 0 10 31 0 17 12 -0.42 15 0 0 0 32 32 12 59 37.9 45 89 52 0 26 51 0 38 13 0 18 38 0 46 27 -0.42 16 0 0 1 2 21 12 59 42.5 46 89 51 0 56 38 1 8 3 0 48 23 1 16 19 -0.42 17 0 0 1 32 45 12 59 47.1 47 90 50 1 27 2 1 38 29 1 18 45 1 46 48 -0.42 18 0 0 2 3 46 12 59 51.9 48 90 49 1 58 1 2 9 31 1 49 42 2 17 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-34 48 12 56 48 24 14 48 4 45 48 32 26 -0.41 99 0 0 48 38 11 13 6 23.9 31 230 -34 48 32 34 48 43 49 48 24 25 48 51 59 -0.41 100 0 0 48 57 17 13 6 26.1 31 231 -35 48 51 41 49 2 54 48 43 34 49 11 1 -0.41 101 0 0 49 15 52 13 6 28.2 30 231 -36 49 10 17 49 21 27 49 2 12 49 29 33 -0.41 102 0 0 49 33 56 13 6 30.2 29 232 -36 49 28 23 49 39 31 49 20 20 49 47 34 -0.41 103 0 0 49 51 31 13 6 32.1 29 233 -37 49 45 58 49 57 4 49 37 57 50 5 6 -0.41 104 0 0 50 8 35 13 6 34.0 28 234 -37 50 3 4 50 14 7 49 55 5 50 22 7 -0.41 105 0 0 50 25 10 13 6 35.8 27 235 -38 50 19 40 50 30 41 50 11 43 50 38 39 -0.41 106 0 0 50 41 16 13 6 37.6 27 236 -39 50 35 47 50 46 46 50 27 52 50 54 42 -0.41 107 0 0 50 56 54 13 6 39.3 26 237 -39 50 51 26 51 2 22 50 43 32 51 10 17 -0.41 108 0 0 51 12 2 13 6 41.0 25 237 -40 51 6 36 51 17 29 50 58 43 51 25 22 -0.41 109 0 0 51 26 43 13 6 42.6 25 238 -40 51 21 17 51 32 8 51 13 27 51 40 0 -0.41 110 0 0 51 40 56 13 6 44.1 24 239 -41 51 35 31 51 46 20 51 27 42 51 54 10 -0.41 111 0 0 51 54 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-0.42 137 0 0 55 26 44 13 7 9.2 8 262 -53 55 21 39 55 31 50 55 14 18 55 39 12 -0.42 138 0 0 55 29 45 13 7 9.7 7 262 -53 55 24 40 55 34 50 55 17 19 55 42 12 -0.42 139 0 0 55 32 25 13 7 10.0 6 263 -53 55 27 20 55 37 30 55 19 59 55 44 51 -0.43 140 0 0 55 34 43 13 7 10.4 6 264 -54 55 29 39 55 39 48 55 22 18 55 47 9 -0.43 141 0 0 55 36 40 13 7 10.7 5 265 -54 55 31 36 55 41 45 55 24 16 55 49 6 -0.43 142 0 0 55 38 16 13 7 11.0 5 266 -54 55 33 12 55 43 21 55 25 52 55 50 41 -0.43 143 0 0 55 39 31 13 7 11.2 4 266 -55 55 34 27 55 44 35 55 27 7 55 51 56 -0.44 144 0 0 55 40 25 13 7 11.4 4 267 -55 55 35 20 55 45 29 55 28 1 55 52 49 -0.44 145 0 0 55 40 57 13 7 11.6 3 268 -55 55 35 53 55 46 1 55 28 33 55 53 22 -0.45 146 0 0 55 41 9 13 7 11.8 2 269 -55 55 36 5 55 46 13 55 28 45 55 53 33 -0.46 147 0 0 55 40 59 13 7 11.9 2 270 -56 55 35 55 55 46 3 55 28 35 55 53 24 -0.48 148 0 0 55 40 29 13 7 12.0 1 271 -56 55 35 25 55 45 33 55 28 5 55 52 54 -0.50 149 0 0 55 39 37 13 7 12.0 1 271 -56 55 34 33 55 44 41 55 27 13 55 52 2 -0.58 150 0 0 55 38 25 13 7 12.1 0 272 -56 55 33 20 55 43 29 55 26 0 55 50 50 -1.06 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: HIP 114005 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 05 17.6907 DE: +01 18 25.122 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 05 17.6902 DE: +01 18 25.118 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 6.2 * B mag [mag]: 6.6 * Diameter [mas]: 0.40 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (47139) 1999 GN9 asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.05380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.019", 0.001", 39.827° remarks: * orbital elements for (47139)1999 GN9 : Mean anomaly = 296.9525074322 deg Arg. of pericenter = 98.0148473904 deg Long. of node = 350.7069374287 deg Inclination = 23.1448768129 deg Eccentricity = 0.1594005540 Semimajor axis = 3.1509150410 AU Perihelion dist = 2.6486574378 AU Mag: H = 12.86, G = 0.15 Epoch of elements : MJD 60666.54348776 TDT (2024 Dec 22.5435) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr27,0.81,2024,12,22,13.043708,-0.205550,0.319696,10.102828,6.582733,0.005337,0.002421,0.000000,0.000000 59.4070,1.4416,-15.95,-23.43,False HIP 114005,23.08824743,1.3069784,6.61,6.15,5.90,0.4,0,,23.10941861,1.4416386,12.47,12.27,0,0,0 47139,1999 GN9,18.62,17.369,3.0538,0,0,1.940,18.96,,1.6,0 0,296.8567,2024,12,22,98.0148,350.7069,23.1449,0.15940,3.15092,2.64866,12.86,5.0,0.15 1.724,0.0187,0.0015,40,0.0057,Known errors,0.97,0,-1,-1 20241222_114005,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org