IOTA/IOTA-ES occultation update for (1672) Gezelle / UCAC4 359-198548 event on 2024 Sep 22, 05:13 UT Visible from Summary ------- On 2024 Sep 22 UT, the 26.3420480442084 km diameter asteroid (1672) Gezelle will occult a 10.4 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.67 mag to 17.10 mag (the magnitude of the asteroid) for at most 8.500 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 22, 04:39 - 2024 Sep 22, 05:47 * geocentric midpoint of event [JD]: 2460575.71779008 * magnitude of target star: 10.43 * magnitude drop [mag]: 6.67 * estimated maximum duration [s]: 8.500 * Moon: 77 % sunlit, 111° distance * Sun: 125° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 10.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 76°) * approx speed of asteroid's shadow [km/s]: 3.1209 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 359-198548 by 1672 Gezelle on 2024 Sep 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 126 0 0 -10 21 31 5 46 51.8 1 108 54 -10 13 40 -10 29 23 -10 9 23 -10 33 39 .... 127 0 0 -10 40 45 5 46 51.1 2 108 53 -10 32 55 -10 48 35 -10 28 39 -10 52 51 -0.12 128 0 0 -10 59 26 5 46 49.7 3 108 52 -10 51 37 -11 7 14 -10 47 22 -11 11 29 -0.18 129 0 0 -11 17 34 5 46 47.6 4 108 51 -11 9 46 -11 25 21 -11 5 32 -11 29 35 -0.21 130 0 0 -11 35 9 5 46 44.9 5 108 50 -11 27 23 -11 42 55 -11 23 9 -11 47 8 -0.22 131 0 0 -11 52 12 5 46 41.6 6 107 49 -11 44 27 -11 59 57 -11 40 14 -12 4 9 -0.23 132 0 0 -12 8 43 5 46 37.6 7 107 48 -12 0 59 -12 16 26 -11 56 47 -12 20 38 -0.24 133 0 0 -12 24 42 5 46 33.0 8 107 47 -12 16 59 -12 32 24 -12 12 47 -12 36 35 -0.24 134 0 0 -12 40 9 5 46 27.9 9 107 46 -12 32 27 -12 47 50 -12 28 16 -12 52 1 -0.24 135 0 0 -12 55 4 5 46 22.1 10 107 45 -12 47 24 -13 2 44 -12 43 14 -13 6 55 -0.24 136 0 0 -13 9 29 5 46 15.8 11 106 44 -13 1 49 -13 17 8 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22 21 9 -0.29 - 75 0 0 23 3 11 4 43 58.6 26 235 -67 23 11 38 22 54 45 23 16 13 22 50 10 -0.29 - 74 0 0 23 32 0 4 43 43.2 25 235 -66 23 40 26 23 23 34 23 45 2 23 18 59 -0.29 - 73 0 0 24 0 37 4 43 28.5 24 235 -66 24 9 3 23 52 11 24 13 38 23 47 37 -0.29 - 72 0 0 24 29 1 4 43 14.3 23 236 -65 24 37 26 24 20 36 24 42 1 24 16 1 -0.29 - 71 0 0 24 57 11 4 43 0.7 22 236 -65 25 5 36 24 48 47 25 10 11 24 44 13 -0.29 - 70 0 0 25 25 8 4 42 47.8 21 237 -64 25 33 32 25 16 44 25 38 7 25 12 10 -0.29 - 69 0 0 25 52 49 4 42 35.4 20 237 -64 26 1 13 25 44 26 26 5 47 25 39 52 -0.29 - 68 0 0 26 20 16 4 42 23.6 19 238 -63 26 28 39 26 11 53 26 33 13 26 7 20 -0.29 - 67 0 0 26 47 26 4 42 12.5 18 238 -63 26 55 49 26 39 4 27 0 22 26 34 31 -0.29 - 66 0 0 27 14 20 4 42 1.9 17 238 -62 27 22 42 27 5 59 27 27 15 27 1 26 -0.29 - 65 0 0 27 40 57 4 41 51.9 16 239 -61 27 49 18 27 32 36 27 53 51 27 28 4 -0.29 - 64 0 0 28 7 16 4 41 42.5 15 239 -61 28 15 37 27 58 56 28 20 9 27 54 25 -0.29 - 63 0 0 28 33 18 4 41 33.7 14 240 -60 28 41 37 28 24 58 28 46 9 28 20 27 -0.29 - 62 0 0 28 59 0 4 41 25.5 13 240 -59 29 7 19 28 50 42 29 11 50 28 46 11 -0.29 - 61 0 0 29 24 24 4 41 17.9 12 241 -59 29 32 41 29 16 6 29 37 12 29 11 36 -0.29 - 60 0 0 29 49 28 4 41 10.9 11 241 -58 29 57 44 29 41 11 30 2 15 29 36 41 -0.28 - 59 0 0 30 14 11 4 41 4.4 10 242 -57 30 22 27 30 5 56 30 26 57 30 1 26 -0.28 - 58 0 0 30 38 35 4 40 58.5 10 242 -57 30 46 50 30 30 20 30 51 19 30 25 51 -0.28 - 57 0 0 31 2 37 4 40 53.2 9 243 -56 31 10 51 30 54 24 31 15 20 30 49 55 -0.28 - 56 0 0 31 26 18 4 40 48.4 8 243 -55 31 34 31 31 18 6 31 38 59 31 13 38 -0.28 - 55 0 0 31 49 38 4 40 44.2 7 244 -54 31 57 49 31 41 26 32 2 17 31 36 59 -0.28 - 54 0 0 32 12 35 4 40 40.6 6 244 -54 32 20 46 32 4 25 32 25 13 31 59 58 -0.28 - 53 0 0 32 35 10 4 40 37.5 5 245 -53 32 43 19 32 27 1 32 47 46 32 22 35 -0.28 - 52 0 0 32 57 22 4 40 34.9 4 245 -52 33 5 30 32 49 14 33 9 56 32 44 48 -0.28 - 51 0 0 33 19 11 4 40 32.9 3 246 -51 33 27 18 33 11 4 33 31 43 33 6 39 -0.28 - 50 0 0 33 40 37 4 40 31.4 2 246 -50 33 48 43 33 32 31 33 53 7 33 28 7 -0.28 - 49 0 0 34 1 39 4 40 30.4 1 247 -50 34 9 44 33 53 34 34 14 8 33 49 11 -0.27 - 48 0 0 34 22 17 4 40 30.0 0 248 -49 34 30 21 34 14 14 34 34 44 34 9 51 -0.26 Uncertainty in time = +/- 11 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 359-198548 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 26 55.6254 DE: -18 13 39.028 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 26 55.6254 DE: -18 13 39.028 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 11.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1672) Gezelle asteroid class: approx. diameter [km]: 26 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.67420 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.018", 0.002", 76.396° remarks: * orbital elements for (1672)Gezelle : Mean anomaly = 273.4146339309 deg Arg. of pericenter = 255.0069725534 deg Long. of node = 181.3141787911 deg Inclination = 1.0681878192 deg Eccentricity = 0.2787541999 Semimajor axis = 3.1685660439 AU Perihelion dist = 2.2853149516 AU Mag: H = 11.53, G = 0.15 Epoch of elements : MJD 60575.21779130 TDT (2024 Sep 22.2178) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,8.50,2024,9,22,5.226962,-0.089160,0.204696,-1.615052,-0.703233,0.004594,0.001078,0.000001,0.000000 -132.8798,-18.1463,99.76,0.12,False UCAC4 359-198548,20.44878484,-18.2275078,11.04,10.43,10.10,0.1,0,,20.47252210,-18.1462839,6.67,6.55,0,0,0 1672,Gezelle,17.10,26.536,2.6742,0,0,-0.372,-2.31,,2.2,0 0,273.3766,2024,9,22,255.0070,181.3142,1.0682,0.27875,3.16857,2.28531,11.53,5.0,0.15 1.272,0.0177,0.0021,76,0.0037,Known errors,0.88,0,-1,-1 20240922_198548,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org