IOTA/IOTA-ES occultation update for (4281) Pounds / TYC 1294-02161-1 event on 2024 Sep 15, 09:36 UT Visible from Summary ------- On 2024 Sep 15 UT, the 10.363 km diameter asteroid (4281) Pounds will occult a 10.8 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.53 mag to 18.31 mag (the magnitude of the asteroid) for at most 0.650 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 15, 09:29 - 2024 Sep 15, 09:43 * geocentric midpoint of event [JD]: 2460568.90043529 * magnitude of target star: 10.78 * magnitude drop [mag]: 7.53 * estimated maximum duration [s]: 0.650 * Moon: 90 % sunlit, 123° distance * Sun: 94° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 15.9593 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1294-02161-1 by 4281 Pounds on 2024 Sep 15 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 -144 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -13 1 55 .. .. .. -13 0 38 .... -143 0 0 -12 40 0 9 30 5.2 1 67 -80 -12 43 6 -12 36 53 -12 44 23 -12 35 36 .... -142 0 0 -12 14 53 9 30 5.4 2 67 -80 -12 18 0 -12 11 47 -12 19 17 -12 10 30 0.07 -141 0 0 -11 49 43 9 30 5.7 3 66 -81 -11 52 49 -11 46 37 -11 54 7 -11 45 20 0.10 -140 0 0 -11 24 30 9 30 6.2 4 66 -81 -11 27 36 -11 21 23 -11 28 53 -11 20 6 0.12 -139 0 0 -10 59 13 9 30 6.9 5 66 -81 -11 2 19 -10 56 7 -11 3 37 -10 54 50 0.13 -138 0 0 -10 33 55 9 30 7.6 6 66 -80 -10 37 1 -10 30 48 -10 38 18 -10 29 31 0.14 -137 0 0 -10 8 35 9 30 8.5 7 66 -80 -10 11 41 -10 5 28 -10 12 58 -10 4 11 0.15 -136 0 0 - 9 43 14 9 30 9.6 9 65 -80 - 9 46 20 - 9 40 7 - 9 47 37 - 9 38 50 0.15 -135 0 0 - 9 17 52 9 30 10.8 10 65 -79 - 9 20 59 - 9 14 46 - 9 22 16 - 9 13 29 0.15 -134 0 0 - 8 52 32 9 30 12.1 11 65 -79 - 8 55 38 - 8 49 26 - 8 56 55 - 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30 0 0 10 10 57 9 40 1.8 57 296 26 10 8 3 10 13 51 10 6 51 10 15 3 0.19 - 29 0 0 10 1 14 9 40 7.9 56 296 27 9 58 20 10 4 8 9 57 8 10 5 20 0.19 - 28 0 0 9 51 7 9 40 13.9 55 295 28 9 48 13 9 54 1 9 47 1 9 55 13 0.19 - 27 0 0 9 40 35 9 40 19.8 54 295 29 9 37 41 9 43 30 9 36 29 9 44 42 0.19 - 26 0 0 9 29 40 9 40 25.7 53 295 30 9 26 45 9 32 34 9 25 33 9 33 46 0.19 - 25 0 0 9 18 20 9 40 31.5 52 295 31 9 15 25 9 21 14 9 14 12 9 22 27 0.19 - 24 0 0 9 6 36 9 40 37.2 51 295 32 9 3 41 9 9 31 9 2 28 9 10 43 0.19 - 23 0 0 8 54 28 9 40 42.9 50 295 33 8 51 33 8 57 23 8 50 20 8 58 36 0.19 - 22 0 0 8 41 57 9 40 48.5 49 294 34 8 39 1 8 44 52 8 37 48 8 46 5 0.19 - 21 0 0 8 29 2 9 40 54.0 48 294 35 8 26 6 8 31 57 8 24 53 8 33 10 0.19 - 20 0 0 8 15 43 9 40 59.4 47 294 36 8 12 47 8 18 39 8 11 34 8 19 52 0.19 - 19 0 0 8 2 2 9 41 4.7 46 294 38 7 59 6 8 4 58 7 57 53 8 6 11 0.19 - 18 0 0 7 47 57 9 41 10.0 45 294 39 7 45 1 7 50 54 7 43 48 7 52 7 0.18 - 17 0 0 7 33 30 9 41 15.2 44 294 40 7 30 34 7 36 27 7 29 20 7 37 40 0.18 - 16 0 0 7 18 40 9 41 20.3 43 294 41 7 15 44 7 21 37 7 14 30 7 22 51 0.18 - 15 0 0 7 3 28 9 41 25.3 42 294 42 7 0 31 7 6 25 6 59 18 7 7 39 0.18 - 14 0 0 6 47 54 9 41 30.2 41 294 43 6 44 57 6 50 51 6 43 43 6 52 5 0.18 - 13 0 0 6 31 58 9 41 35.0 40 294 44 6 29 0 6 34 55 6 27 46 6 36 9 0.18 - 12 0 0 6 15 40 9 41 39.8 39 294 45 6 12 42 6 18 38 6 11 28 6 19 51 0.18 - 11 0 0 5 59 1 9 41 44.4 38 294 46 5 56 3 6 1 59 5 54 49 6 3 13 0.18 - 10 0 0 5 42 0 9 41 48.9 37 294 47 5 39 2 5 44 59 5 37 48 5 46 13 0.18 - 9 0 0 5 24 39 9 41 53.4 36 294 48 5 21 41 5 27 38 5 20 26 5 28 52 0.18 - 8 0 0 5 6 57 9 41 57.7 35 294 49 5 3 59 5 9 56 5 2 44 5 11 11 0.18 - 7 0 0 4 48 55 9 42 1.9 34 294 50 4 45 56 4 51 55 4 44 42 4 53 9 0.18 - 6 0 0 4 30 34 9 42 6.0 33 294 51 4 27 34 4 33 33 4 26 20 4 34 47 0.18 - 5 0 0 4 11 52 9 42 10.0 32 294 52 4 8 53 4 14 52 4 7 38 4 16 6 0.18 - 4 0 0 3 52 52 9 42 13.9 31 294 53 3 49 52 3 55 51 3 48 37 3 57 6 0.18 - 3 0 0 3 33 32 9 42 17.7 29 294 54 3 30 32 3 36 32 3 29 17 3 37 47 0.18 - 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6 36 43 - 6 44 11 - 6 35 26 0.09 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1294-02161-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 10 11.1186 DE: +22 21 24.154 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 10 11.1188 DE: +22 21 24.154 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.8 * B mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4281) Pounds asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.87930 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 date of fit: 2022 Nov 25 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): 0.017", 0.002", 85.813° remarks: * orbital elements for (4281)Pounds : Mean anomaly = 10.8318872681 deg Arg. of pericenter = 209.8251488551 deg Long. of node = 187.8868216130 deg Inclination = 0.7305366826 deg Eccentricity = 0.1114503934 Semimajor axis = 2.4638831929 AU Perihelion dist = 2.1892824417 AU Mag: H = 14.01, G = 0.15 Epoch of elements : MJD 60568.40043638 TDT (2024 Sep 15.4004) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472022Nov25,0.65,2024,9,15,9.610447,0.010608,-0.185687,8.992475,0.526955,-0.005323,-0.000438,0.000000,0.000000 -61.0826,22.3886,34.61,2.76,False TYC 1294-02161-1,5.16975515,22.3567094,11.24,10.78,10.53,0.0,0,,5.19453193,22.3885947,7.53,7.33,0,0,0 4281,Pounds,18.31,10.363,1.8793,0,0,3.034,2.47,,0.8,0 0,10.7298,2024,9,15,209.8251,187.8868,0.7305,0.11145,2.46388,2.18928,14.01,5.0,0.15 1.208,0.0167,0.0016,86,0.0016,Known errors,0.98,0,-1,-1 20240915_2161-1,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org