IOTA/IOTA-ES occultation update for (12552) 1998 QQ45 / TYC 6773-01084-1 event on 2024 Jan 06, 08:08 UT Visible from Summary ------- On 2024 Jan 06 UT, the 17.2715810702313 km diameter asteroid (12552) 1998 QQ45 will occult a 9.0 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.36 mag to 18.40 mag (the magnitude of the asteroid) for at most 0.500 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 Jan 06, 08:05 - 2024 Jan 06, 08:12 * geocentric midpoint of event [JD]: 2460315.83957641 * magnitude of target star: 9.04 * magnitude drop [mag]: 9.36 * estimated maximum duration [s]: 0.500 * Moon: 29 % sunlit, 15° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.001", 108°) * approx speed of asteroid's shadow [km/s]: 35.2820 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6773-01084-1 by 12552 1998 QQ45 on 2024 Jan 6 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 - 79 0 0 19 41 40 8 5 58.8 0 121 -52 19 36 8 .. .. .. 19 32 28 .. .. .. .... - 78 0 0 19 7 8 8 5 58.8 1 121 -51 19 1 34 19 12 42 18 57 53 19 16 23 0.16 - 77 0 0 18 31 58 8 5 58.9 2 122 -50 18 26 23 18 37 34 18 22 41 18 41 15 0.10 - 76 0 0 17 56 11 8 5 59.1 3 122 -48 17 50 34 18 1 47 17 46 51 18 5 30 0.08 - 75 0 0 17 19 46 8 5 59.3 4 122 -47 17 14 8 17 25 24 17 10 24 17 29 7 0.07 - 74 0 0 16 42 45 8 5 59.6 6 123 -46 16 37 5 16 48 24 16 33 21 16 52 8 0.07 - 73 0 0 16 5 8 8 6 0.0 7 123 -45 15 59 27 16 10 48 15 55 42 16 14 34 0.06 - 72 0 0 15 26 55 8 6 0.5 8 123 -44 15 21 13 15 32 37 15 17 27 15 36 23 0.06 - 71 0 0 14 48 8 8 6 1.0 9 123 -43 14 42 25 14 53 51 14 38 38 14 57 38 0.06 - 70 0 0 14 8 47 8 6 1.6 10 124 -42 14 3 3 14 14 32 13 59 15 14 18 19 0.06 - 69 0 0 13 28 53 8 6 2.3 11 124 -41 13 23 7 13 34 38 13 19 19 13 38 27 0.05 - 68 0 0 12 48 26 8 6 3.1 13 124 -40 12 42 40 12 54 13 12 38 50 12 58 2 0.05 - 67 0 0 12 7 28 8 6 4.0 14 124 -38 12 1 41 12 13 16 11 57 51 12 17 6 0.05 - 66 0 0 11 26 0 8 6 4.9 15 125 -37 11 20 11 11 31 49 11 16 21 11 35 40 0.05 - 65 0 0 10 44 3 8 6 5.9 16 125 -36 10 38 13 10 49 53 10 34 21 10 53 44 0.05 - 64 0 0 10 1 37 8 6 7.0 17 125 -35 9 55 46 10 7 28 9 51 54 10 11 20 0.05 - 63 0 0 9 18 45 8 6 8.2 19 125 -34 9 12 53 9 24 37 9 9 0 9 28 30 0.05 - 62 0 0 8 35 27 8 6 9.5 20 125 -33 8 29 34 8 41 20 8 25 40 8 45 13 0.05 - 61 0 0 7 51 44 8 6 10.9 21 125 -31 7 45 50 7 57 38 7 41 57 8 1 32 0.05 - 60 0 0 7 7 39 8 6 12.3 22 125 -30 7 1 44 7 13 34 6 57 50 7 17 28 0.05 - 59 0 0 6 23 12 8 6 13.8 24 126 -29 6 17 17 6 29 8 6 13 22 6 33 3 0.05 - 58 0 0 5 38 26 8 6 15.4 25 126 -28 5 32 30 5 44 22 5 28 34 5 48 18 0.05 - 57 0 0 4 53 21 8 6 17.1 26 126 -27 4 47 24 4 59 18 4 43 28 5 3 14 0.05 - 56 0 0 4 8 0 8 6 18.9 27 126 -25 4 2 2 4 13 57 3 58 6 4 17 53 0.05 - 55 0 0 3 22 23 8 6 20.8 29 126 -24 3 16 25 3 28 21 3 12 28 3 32 18 0.05 - 54 0 0 2 36 33 8 6 22.7 30 126 -23 2 30 34 2 42 32 2 26 37 2 46 29 0.05 - 53 0 0 1 50 32 8 6 24.7 31 126 -22 1 44 33 1 56 31 1 40 35 2 0 28 0.05 - 52 0 0 1 4 21 8 6 26.8 32 126 -20 0 58 21 1 10 21 0 54 24 1 14 18 0.05 - 51 0 0 0 18 2 8 6 29.0 34 126 -19 0 12 2 0 24 2 0 8 5 0 28 0 0.04 - 50 0 0 - 0 28 22 8 6 31.3 35 126 -18 - 0 34 23 - 0 22 22 - 0 38 20 - 0 18 25 0.04 - 49 0 0 - 1 14 51 8 6 33.6 36 126 -17 - 1 20 52 - 1 8 51 - 1 24 50 - 1 4 53 0.04 - 48 0 0 - 2 1 22 8 6 36.0 37 126 -16 - 2 7 23 - 1 55 22 - 2 11 21 - 1 51 24 0.04 - 47 0 0 - 2 47 53 8 6 38.5 39 126 -14 - 2 53 54 - 2 41 53 - 2 57 52 - 2 37 55 0.04 - 46 0 0 - 3 34 23 8 6 41.0 40 126 -13 - 3 40 23 - 3 28 23 - 3 44 22 - 3 24 25 0.04 - 45 0 0 - 4 20 49 8 6 43.6 41 126 -12 - 4 26 49 - 4 14 49 - 4 30 47 - 4 10 51 0.04 - 44 0 0 - 5 7 10 8 6 46.3 43 125 -11 - 5 13 10 - 5 1 9 - 5 17 8 - 4 57 12 0.04 - 43 0 0 - 5 53 23 8 6 49.0 44 125 -9 - 5 59 23 - 5 47 23 - 6 3 20 - 5 43 25 0.04 - 42 0 0 - 6 39 27 8 6 51.8 45 125 -8 - 6 45 26 - 6 33 27 - 6 49 24 - 6 29 29 0.04 - 41 0 0 - 7 25 19 8 6 54.7 46 125 -7 - 7 31 19 - 7 19 20 - 7 35 16 - 7 15 23 0.04 - 40 0 0 - 8 10 59 8 6 57.6 48 125 -6 - 8 16 58 - 8 5 1 - 8 20 55 - 8 1 4 0.04 - 39 0 0 - 8 56 25 8 7 0.5 49 125 -4 - 9 2 23 - 8 50 26 - 9 6 20 - 8 46 30 0.04 - 38 0 0 - 9 41 33 8 7 3.5 50 124 -3 - 9 47 31 - 9 35 36 - 9 51 27 - 9 31 39 0.04 - 37 0 0 -10 26 24 8 7 6.6 51 124 -2 -10 32 21 -10 20 27 -10 36 17 -10 16 31 0.04 - 36 0 0 -11 10 55 8 7 9.6 53 124 -1 -11 16 51 -11 4 59 -11 20 47 -11 1 3 0.04 - 35 0 0 -11 55 5 8 7 12.7 54 124 0 -12 1 0 -11 49 9 -12 4 55 -11 45 14 0.04 - 34 0 0 -12 38 52 8 7 15.9 55 123 2 -12 44 46 -12 32 57 -12 48 41 -12 29 2 0.04 - 33 0 0 -13 22 14 8 7 19.1 56 123 3 -13 28 8 -13 16 20 -13 32 2 -13 12 26 0.04 - 32 0 0 -14 5 11 8 7 22.3 57 123 4 -14 11 4 -13 59 18 -14 14 57 -13 55 25 0.04 - 31 0 0 -14 47 41 8 7 25.5 59 122 5 -14 53 33 -14 41 49 -14 57 25 -14 37 56 0.04 - 30 0 0 -15 29 42 8 7 28.8 60 122 6 -15 35 33 -15 23 51 -15 39 25 -15 19 59 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74 -38 23 48 -38 14 11 -38 26 59 -38 11 0 0.04 59 0 0 -38 10 21 8 11 18.7 39 261 74 -38 15 11 -38 5 32 -38 18 22 -38 2 21 0.04 60 0 0 -38 1 11 8 11 20.3 39 260 74 -38 6 1 -37 56 22 -38 9 13 -37 53 10 0.04 61 0 0 -37 51 30 8 11 21.9 38 260 74 -37 56 20 -37 46 39 -37 59 32 -37 43 27 0.04 62 0 0 -37 41 16 8 11 23.4 37 259 74 -37 46 7 -37 36 25 -37 49 20 -37 33 13 0.04 63 0 0 -37 30 30 8 11 25.0 36 259 74 -37 35 22 -37 25 38 -37 38 35 -37 22 26 0.04 64 0 0 -37 19 12 8 11 26.5 35 258 74 -37 24 4 -37 14 19 -37 27 18 -37 11 6 0.04 65 0 0 -37 7 21 8 11 28.0 34 257 74 -37 12 14 -37 2 27 -37 15 28 -36 59 14 0.04 66 0 0 -36 54 57 8 11 29.4 34 257 74 -36 59 51 -36 50 3 -37 3 5 -36 46 48 0.04 67 0 0 -36 42 0 8 11 30.9 33 256 74 -36 46 54 -36 37 5 -36 50 9 -36 33 50 0.04 68 0 0 -36 28 29 8 11 32.3 32 255 74 -36 33 25 -36 23 33 -36 36 40 -36 20 18 0.04 69 0 0 -36 14 25 8 11 33.7 31 255 73 -36 19 21 -36 9 28 -36 22 37 -36 6 12 0.04 70 0 0 -35 59 47 8 11 35.1 30 254 73 -36 4 44 -35 54 49 -36 8 1 -35 51 33 0.04 71 0 0 -35 44 35 8 11 36.4 29 254 73 -35 49 33 -35 39 36 -35 52 50 -35 36 19 0.04 72 0 0 -35 28 48 8 11 37.8 29 253 72 -35 33 47 -35 23 49 -35 37 5 -35 20 31 0.04 73 0 0 -35 12 27 8 11 39.0 28 252 72 -35 17 27 -35 7 26 -35 20 45 -35 4 8 0.04 74 0 0 -34 55 31 8 11 40.3 27 252 72 -35 0 32 -34 50 29 -35 3 51 -34 47 10 0.04 75 0 0 -34 37 59 8 11 41.5 26 251 71 -34 43 2 -34 32 57 -34 46 21 -34 29 37 0.04 76 0 0 -34 19 52 8 11 42.8 25 251 71 -34 24 56 -34 14 49 -34 28 16 -34 11 29 0.04 77 0 0 -34 1 10 8 11 43.9 24 250 70 -34 6 14 -33 56 6 -34 9 36 -33 52 44 0.04 78 0 0 -33 41 52 8 11 45.1 23 250 69 -33 46 57 -33 36 46 -33 50 19 -33 33 24 0.04 79 0 0 -33 21 57 8 11 46.2 22 249 69 -33 27 4 -33 16 50 -33 30 26 -33 13 28 0.04 80 0 0 -33 1 26 8 11 47.3 22 248 68 -33 6 34 -32 56 18 -33 9 57 -32 52 55 0.04 81 0 0 -32 40 18 8 11 48.3 21 248 68 -32 45 27 -32 35 9 -32 48 51 -32 31 45 0.04 82 0 0 -32 18 33 8 11 49.3 20 247 67 -32 23 43 -32 13 23 -32 27 8 -32 9 58 0.04 83 0 0 -31 56 11 8 11 50.3 19 247 66 -32 1 23 -31 51 0 -32 4 49 -31 47 34 0.05 84 0 0 -31 33 12 8 11 51.2 18 246 66 -31 38 25 -31 28 0 -31 41 51 -31 24 33 0.05 85 0 0 -31 9 35 8 11 52.1 17 246 65 -31 14 49 -31 4 22 -31 18 17 -31 0 54 0.05 86 0 0 -30 45 21 8 11 52.9 16 245 64 -30 50 36 -30 40 6 -30 54 4 -30 36 38 0.05 87 0 0 -30 20 28 8 11 53.8 15 245 63 -30 25 45 -30 15 12 -30 29 14 -30 11 43 0.05 88 0 0 -29 54 58 8 11 54.5 14 244 62 -30 0 16 -29 49 40 -30 3 45 -29 46 11 0.05 89 0 0 -29 28 49 8 11 55.2 13 244 62 -29 34 8 -29 23 30 -29 37 39 -29 20 0 0.05 90 0 0 -29 2 2 8 11 55.9 12 243 61 -29 7 22 -28 56 42 -29 10 54 -28 53 11 0.05 91 0 0 -28 34 37 8 11 56.6 11 243 60 -28 39 58 -28 29 15 -28 43 31 -28 25 43 0.05 92 0 0 -28 6 33 8 11 57.1 10 242 59 -28 11 56 -28 1 10 -28 15 29 -27 57 37 0.06 93 0 0 -27 37 51 8 11 57.7 9 242 58 -27 43 15 -27 32 27 -27 46 49 -27 28 53 0.06 94 0 0 -27 8 30 8 11 58.1 8 241 57 -27 13 56 -27 3 5 -27 17 31 -26 59 30 0.06 95 0 0 -26 38 31 8 11 58.6 7 241 57 -26 43 58 -26 33 4 -26 47 34 -26 29 28 0.06 96 0 0 -26 7 54 8 11 59.0 6 241 56 -26 13 22 -26 2 26 -26 16 59 -25 58 49 0.07 97 0 0 -25 36 38 8 11 59.3 5 240 55 -25 42 7 -25 31 9 -25 45 45 -25 27 31 0.08 98 0 0 -25 4 44 8 11 59.5 4 240 54 -25 10 15 -24 59 14 -25 13 54 -24 55 35 0.09 99 0 0 -24 32 13 8 11 59.7 3 239 53 -24 37 45 -24 26 41 -24 41 24 -24 23 1 0.10 100 0 0 -23 59 3 8 11 59.9 2 239 52 -24 4 37 -23 53 30 -24 8 17 -23 49 50 0.14 101 0 0 -23 25 17 8 11 59.9 1 238 51 -23 30 52 -23 19 42 -23 34 33 -23 16 1 0.30 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 6773-01084-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 04 27.9722 DE: -28 58 50.548 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 04 27.9724 DE: -28 58 50.548 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.0 * B mag [mag]: 9.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (12552) 1998 QQ45 asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.41140 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 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", 0.001", 107.83° remarks: * orbital elements for (12552)1998 QQ45 : Mean anomaly = 47.7380158960 deg Arg. of pericenter = 196.8609488513 deg Long. of node = 323.6825463987 deg Inclination = 13.5981854114 deg Eccentricity = 0.0883227397 Semimajor axis = 3.1156398287 AU Perihelion dist = 2.8404579831 AU Mag: H = 12.53, G = 0.15 Epoch of elements : MJD 60315.33957654 TDT (2024 Jan 06.3396) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,0.50,2024,1,6,8.149834,-0.013984,-0.030982,18.120581,-8.259399,-0.004809,0.000671,-0.000001,0.000001 -1.1898,-29.0724,59.14,-22.54,False TYC 6773-01084-1,15.07443668,-28.9807077,9.63,9.04,8.72,0.1,0,,15.09812093,-29.0724422,9.36,9.23,0,0,0 12552,1998 QQ45,18.40,17.519,3.4114,0,0,3.564,-21.29,,2.0,0 0,47.6772,2024,1,6,196.8609,323.6825,13.5982,0.08832,3.11564,2.84046,12.53,5.0,0.15 1.330,0.0173,0.0012,108,0.0023,Known errors,1.08,0,-1,-1 20240106_1084-1,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org