IOTA/IOTA-ES occultation update for (1274) Delportia / TYC 6778-01791-1 event on 2024 Jan 20, 08:35 UT Visible from Summary ------- On 2024 Jan 20 UT, the 11.1944623711294 km diameter asteroid (1274) Delportia will occult a 10.0 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 6.42 mag to 16.38 mag (the magnitude of the asteroid) for at most 0.330 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 Jan 20, 08:32 - 2024 Jan 20, 08:38 * geocentric midpoint of event [JD]: 2460329.85819025 * magnitude of target star: 9.96 * magnitude drop [mag]: 6.42 * estimated maximum duration [s]: 0.330 * Moon: 73 % sunlit, 176° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 102°) * approx speed of asteroid's shadow [km/s]: 35.9672 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6778-01791-1 by 1274 Delportia on 2024 Jan 20 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 - 88 0 0 23 52 6 8 32 53.8 0 116 -55 23 48 27 23 55 45 23 46 1 23 58 11 .... - 87 0 0 23 24 46 8 32 53.8 1 117 -54 23 21 6 23 28 25 23 18 40 23 30 51 0.00 - 86 0 0 22 57 5 8 32 53.9 2 117 -53 22 53 26 23 0 45 22 50 59 23 3 12 -0.09 - 85 0 0 22 29 6 8 32 54.1 3 117 -52 22 25 26 22 32 46 22 22 59 22 35 13 -0.12 - 84 0 0 22 0 48 8 32 54.3 4 118 -51 21 57 7 22 4 28 21 54 40 22 6 55 -0.14 - 83 0 0 21 32 11 8 32 54.6 5 118 -50 21 28 30 21 35 52 21 26 3 21 38 19 -0.15 - 82 0 0 21 3 17 8 32 54.9 6 119 -49 20 59 36 21 6 58 20 57 8 21 9 25 -0.16 - 81 0 0 20 34 6 8 32 55.3 8 119 -48 20 30 24 20 37 47 20 27 57 20 40 15 -0.16 - 80 0 0 20 4 38 8 32 55.8 9 119 -47 20 0 56 20 8 20 19 58 28 20 10 48 -0.17 - 79 0 0 19 34 54 8 32 56.3 10 120 -46 19 31 12 19 38 37 19 28 45 19 41 5 -0.17 - 78 0 0 19 4 56 8 32 56.9 11 120 -45 19 1 14 19 8 38 18 58 46 19 11 7 -0.17 - 77 0 0 18 34 43 8 32 57.6 12 120 -44 18 31 1 18 38 26 18 28 32 18 40 54 -0.17 - 76 0 0 18 4 16 8 32 58.3 13 121 -43 18 0 34 18 7 59 17 58 5 18 10 28 -0.18 - 75 0 0 17 33 37 8 32 59.1 14 121 -42 17 29 54 17 37 20 17 27 25 17 39 49 -0.18 - 74 0 0 17 2 45 8 32 59.9 15 121 -41 16 59 2 17 6 28 16 56 33 17 8 57 -0.18 - 73 0 0 16 31 42 8 33 0.9 16 122 -40 16 27 59 16 35 26 16 25 30 16 37 54 -0.18 - 72 0 0 16 0 29 8 33 1.9 17 122 -39 15 56 45 16 4 12 15 54 16 16 6 41 -0.18 - 71 0 0 15 29 5 8 33 2.9 18 122 -38 15 25 22 15 32 49 15 22 53 15 35 18 -0.18 - 70 0 0 14 57 33 8 33 4.0 19 122 -37 14 53 49 15 1 17 14 51 20 15 3 46 -0.18 - 69 0 0 14 25 53 8 33 5.2 21 123 -36 14 22 9 14 29 37 14 19 40 14 32 6 -0.18 - 68 0 0 13 54 6 8 33 6.5 22 123 -35 13 50 22 13 57 49 13 47 53 14 0 19 -0.18 - 67 0 0 13 22 12 8 33 7.8 23 123 -34 13 18 28 13 25 56 13 15 59 13 28 25 -0.18 - 66 0 0 12 50 13 8 33 9.2 24 124 -33 12 46 29 12 53 57 12 44 0 12 56 26 -0.19 - 65 0 0 12 18 10 8 33 10.6 25 124 -32 12 14 26 12 21 54 12 11 57 12 24 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8 38 39.1 9 247 67 - 6 43 27 - 6 36 25 - 6 45 48 - 6 34 4 -0.19 73 0 0 - 6 16 21 8 38 39.6 8 247 66 - 6 19 53 - 6 12 49 - 6 22 14 - 6 10 28 -0.19 74 0 0 - 5 52 21 8 38 40.0 7 247 65 - 5 55 53 - 5 48 49 - 5 58 15 - 5 46 28 -0.19 75 0 0 - 5 27 58 8 38 40.4 6 247 64 - 5 31 30 - 5 24 25 - 5 33 52 - 5 22 3 -0.19 76 0 0 - 5 3 11 8 38 40.7 5 247 63 - 5 6 43 - 4 59 37 - 5 9 5 - 4 57 15 -0.19 77 0 0 - 4 38 0 8 38 41.0 4 246 62 - 4 41 34 - 4 34 27 - 4 43 56 - 4 32 4 -0.19 78 0 0 - 4 12 27 8 38 41.2 3 246 61 - 4 16 1 - 4 8 53 - 4 18 24 - 4 6 30 -0.19 79 0 0 - 3 46 32 8 38 41.3 2 246 60 - 3 50 6 - 3 42 57 - 3 52 29 - 3 40 34 -0.18 80 0 0 - 3 20 15 8 38 41.3 0 246 59 - 3 23 50 - 3 16 40 - 3 26 13 - 3 14 17 -0.13 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 6778-01791-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 50 25.9617 DE: -23 42 09.173 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 50 25.9618 DE: -23 42 09.173 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.0 * B mag [mag]: 11.5 * Diameter [mas]: 0.40 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1274) Delportia asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.29410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 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): 0.014", 0.002", 102.379° remarks: * orbital elements for (1274)Delportia : Mean anomaly = 2.6357163388 deg Arg. of pericenter = 244.9355767071 deg Long. of node = 327.0469778021 deg Inclination = 4.3943806925 deg Eccentricity = 0.1140798070 Semimajor axis = 2.2292242524 AU Perihelion dist = 1.9749147798 AU Mag: H = 11.93, G = 0.15 Epoch of elements : MJD 60329.35819034 TDT (2024 Jan 20.3582) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr24,0.33,2024,1,20,8.596566,0.051156,0.190877,19.626253,-5.190061,-0.004602,0.000820,-0.000001,0.000000 -10.2192,-23.7747,53.76,-20.20,False TYC 6778-01791-1,15.84054487,-23.7025480,11.47,9.96,9.14,0.4,4,,15.86407231,-23.7746590,6.43,6.79,0,0,0 1274,Delportia,16.38,11.860,2.2941,0,0,5.482,-19.89,,0.8,0 0,2.5296,2024,1,20,244.9356,327.0470,4.3944,0.11408,2.22922,1.97491,11.94,5.0,0.15 1.333,0.0137,0.0023,102,0.0024,Known errors,1.10,0,-1,-1 20240120_1791-1,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org