IOTA/IOTA-ES occultation update for (8008) 1988 TQ4 / UCAC4 340-160830 event on 2024 Jul 02, 22:41 UT Visible from Summary ------- On 2024 Jul 02 UT, the 12.8164793670509 km diameter asteroid (8008) 1988 TQ4 will occult a 11.2 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.89 mag to 17.05 mag (the magnitude of the asteroid) for at most 1.100 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: 96 * date and approx. time of event: 2024 Jul 02, 22:32 - 2024 Jul 02, 22:50 * geocentric midpoint of event [JD]: 2460494.44569450 * magnitude of target star: 11.16 * magnitude drop [mag]: 5.89 * estimated maximum duration [s]: 1.100 * Moon: 10 % sunlit, 145° distance * Sun: 177° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 11.8044 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-160830 by 8008 1988 TQ4 on 2024 Jul 2 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 - 73 0 0 1 57 25 22 50 43.0 1 112 2 2 1 15 1 53 34 2 4 25 1 50 24 .... - 72 0 0 1 33 1 22 50 42.8 2 112 1 1 36 51 1 29 11 1 40 1 1 26 1 -0.04 - 71 0 0 1 8 48 22 50 42.4 3 112 0 1 12 37 1 4 58 1 15 47 1 1 48 -0.08 - 70 0 0 0 44 45 22 50 41.8 4 112 -1 0 48 34 0 40 55 0 51 44 0 37 46 -0.10 - 69 0 0 0 20 53 22 50 41.0 5 112 -2 0 24 42 0 17 4 0 27 51 0 13 54 -0.11 - 68 0 0 - 0 2 48 22 50 40.0 6 112 -3 0 1 1 - 0 6 36 0 4 11 - 0 9 45 -0.12 - 67 0 0 - 0 26 16 22 50 38.8 7 112 -4 - 0 22 27 - 0 30 4 - 0 19 18 - 0 33 13 -0.13 - 66 0 0 - 0 49 31 22 50 37.4 8 112 -5 - 0 45 43 - 0 53 20 - 0 42 34 - 0 56 28 -0.13 - 65 0 0 - 1 12 34 22 50 35.9 9 112 -7 - 1 8 46 - 1 16 22 - 1 5 37 - 1 19 30 -0.13 - 64 0 0 - 1 35 23 22 50 34.1 10 112 -8 - 1 31 35 - 1 39 11 - 1 28 27 - 1 42 19 -0.13 - 63 0 0 - 1 57 58 22 50 32.2 11 112 -9 - 1 54 11 - 2 1 46 - 1 51 3 - 2 4 54 -0.14 - 62 0 0 - 2 20 19 22 50 30.1 13 112 -10 - 2 16 32 - 2 24 6 - 2 13 24 - 2 27 14 -0.14 - 61 0 0 - 2 42 25 22 50 27.9 14 112 -11 - 2 38 38 - 2 46 12 - 2 35 31 - 2 49 19 -0.14 - 60 0 0 - 3 4 16 22 50 25.4 15 112 -12 - 3 0 29 - 3 8 3 - 2 57 22 - 3 11 10 -0.14 - 59 0 0 - 3 25 51 22 50 22.8 16 112 -13 - 3 22 5 - 3 29 38 - 3 18 58 - 3 32 44 -0.14 - 58 0 0 - 3 47 11 22 50 20.0 17 112 -14 - 3 43 25 - 3 50 57 - 3 40 18 - 3 54 3 -0.14 - 57 0 0 - 4 8 14 22 50 17.1 18 112 -15 - 4 4 28 - 4 11 59 - 4 1 22 - 4 15 6 -0.14 - 56 0 0 - 4 29 0 22 50 14.0 19 112 -16 - 4 25 15 - 4 32 46 - 4 22 9 - 4 35 52 -0.14 - 55 0 0 - 4 49 30 22 50 10.7 20 112 -17 - 4 45 45 - 4 53 15 - 4 42 39 - 4 56 21 -0.14 - 54 0 0 - 5 9 42 22 50 7.3 21 112 -18 - 5 5 57 - 5 13 27 - 5 2 52 - 5 16 32 -0.14 - 53 0 0 - 5 29 37 22 50 3.7 22 112 -19 - 5 25 52 - 5 33 21 - 5 22 47 - 5 36 26 -0.14 - 52 0 0 - 5 49 13 22 49 59.9 23 112 -20 - 5 45 29 - 5 52 57 - 5 42 24 - 5 56 2 -0.14 - 51 0 0 - 6 8 32 22 49 56.0 24 112 -21 - 6 4 48 - 6 12 15 - 6 1 43 - 6 15 20 -0.14 - 50 0 0 - 6 27 32 22 49 52.0 25 111 -22 - 6 23 49 - 6 31 15 - 6 20 44 - 6 34 20 -0.14 - 49 0 0 - 6 46 13 22 49 47.8 26 111 -23 - 6 42 30 - 6 49 56 - 6 39 26 - 6 53 1 -0.14 - 48 0 0 - 7 4 36 22 49 43.4 27 111 -24 - 7 0 53 - 7 8 19 - 6 57 49 - 7 11 22 -0.14 - 47 0 0 - 7 22 39 22 49 38.9 28 111 -25 - 7 18 57 - 7 26 22 - 7 15 53 - 7 29 25 -0.14 - 46 0 0 - 7 40 23 22 49 34.3 29 111 -26 - 7 36 41 - 7 44 5 - 7 33 38 - 7 47 9 -0.14 - 45 0 0 - 7 57 48 22 49 29.5 30 111 -27 - 7 54 6 - 8 1 29 - 7 51 3 - 8 4 32 -0.14 - 44 0 0 - 8 14 52 22 49 24.7 31 111 -28 - 8 11 11 - 8 18 34 - 8 8 8 - 8 21 36 -0.14 - 43 0 0 - 8 31 37 22 49 19.6 32 111 -29 - 8 27 56 - 8 35 18 - 8 24 53 - 8 38 21 -0.14 - 42 0 0 - 8 48 1 22 49 14.5 33 111 -30 - 8 44 21 - 8 51 42 - 8 41 18 - 8 54 44 -0.14 - 41 0 0 - 9 4 6 22 49 9.2 34 111 -31 - 9 0 25 - 9 7 46 - 8 57 23 - 9 10 48 -0.14 - 40 0 0 - 9 19 49 22 49 3.8 35 111 -32 - 9 16 9 - 9 23 29 - 9 13 7 - 9 26 31 -0.14 - 39 0 0 - 9 35 12 22 48 58.3 36 111 -33 - 9 31 33 - 9 38 52 - 9 28 31 - 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14 0 0 -14 3 29 22 46 8.3 60 110 -57 -13 59 55 -14 7 3 -13 56 59 -14 10 0 -0.14 - 13 0 0 -14 9 27 22 46 0.5 61 110 -58 -14 5 54 -14 13 1 -14 2 57 -14 15 58 -0.14 - 12 0 0 -14 15 3 22 45 52.6 62 111 -59 -14 11 29 -14 18 37 -14 8 33 -14 21 33 -0.14 - 11 0 0 -14 20 17 22 45 44.7 63 111 -60 -14 16 43 -14 23 50 -14 13 47 -14 26 46 -0.14 - 10 0 0 -14 25 8 22 45 36.7 64 111 -61 -14 21 34 -14 28 41 -14 18 38 -14 31 37 -0.14 - 9 0 0 -14 29 37 22 45 28.7 64 111 -62 -14 26 3 -14 33 10 -14 23 7 -14 36 6 -0.14 - 8 0 0 -14 33 43 22 45 20.6 65 112 -62 -14 30 10 -14 37 17 -14 27 14 -14 40 13 -0.14 - 7 0 0 -14 37 28 22 45 12.4 66 112 -63 -14 33 55 -14 41 1 -14 30 59 -14 43 57 -0.14 - 6 0 0 -14 40 50 22 45 4.2 67 113 -64 -14 37 17 -14 44 23 -14 34 21 -14 47 19 -0.14 - 5 0 0 -14 43 50 22 44 56.0 68 113 -65 -14 40 17 -14 47 23 -14 37 21 -14 50 19 -0.14 - 4 0 0 -14 46 27 22 44 47.7 69 114 -66 -14 42 55 -14 50 0 -14 39 59 -14 52 56 -0.14 - 3 0 0 -14 48 43 22 44 39.4 70 114 -67 -14 45 10 -14 52 16 -14 42 14 -14 55 11 -0.14 - 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9 56 5 22 37 59.5 64 239 -66 - 9 52 26 - 9 59 44 - 9 49 25 -10 2 45 -0.14 44 0 0 - 9 41 21 22 37 51.2 63 240 -65 - 9 37 42 - 9 45 1 - 9 34 41 - 9 48 2 -0.14 45 0 0 - 9 26 17 22 37 42.9 62 240 -64 - 9 22 38 - 9 29 57 - 9 19 36 - 9 32 59 -0.14 46 0 0 - 9 10 54 22 37 34.7 61 240 -63 - 9 7 13 - 9 14 34 - 9 4 12 - 9 17 35 -0.14 47 0 0 - 8 55 10 22 37 26.5 60 241 -62 - 8 51 30 - 8 58 50 - 8 48 27 - 9 1 52 -0.14 48 0 0 - 8 39 7 22 37 18.4 59 241 -61 - 8 35 26 - 8 42 47 - 8 32 24 - 8 45 49 -0.15 49 0 0 - 8 22 44 22 37 10.3 58 241 -60 - 8 19 3 - 8 26 25 - 8 16 0 - 8 29 27 -0.15 50 0 0 - 8 6 2 22 37 2.4 57 241 -59 - 8 2 20 - 8 9 43 - 7 59 18 - 8 12 46 -0.15 51 0 0 - 7 49 1 22 36 54.4 56 242 -58 - 7 45 19 - 7 52 42 - 7 42 16 - 7 55 45 -0.15 52 0 0 - 7 31 40 22 36 46.6 55 242 -57 - 7 27 59 - 7 35 22 - 7 24 55 - 7 38 25 -0.15 53 0 0 - 7 14 2 22 36 38.8 54 242 -56 - 7 10 20 - 7 17 44 - 7 7 16 - 7 20 47 -0.15 54 0 0 - 6 56 4 22 36 31.1 53 242 -55 - 6 52 22 - 6 59 47 - 6 49 18 - 7 2 51 -0.15 55 0 0 - 6 37 49 22 36 23.5 52 242 -54 - 6 34 6 - 6 41 32 - 6 31 2 - 6 44 36 -0.15 56 0 0 - 6 19 15 22 36 16.0 51 242 -53 - 6 15 32 - 6 22 59 - 6 12 28 - 6 26 3 -0.15 57 0 0 - 6 0 24 22 36 8.6 50 242 -52 - 5 56 41 - 6 4 8 - 5 53 36 - 6 7 12 -0.15 58 0 0 - 5 41 15 22 36 1.2 49 242 -51 - 5 37 32 - 5 44 59 - 5 34 27 - 5 48 4 -0.15 59 0 0 - 5 21 49 22 35 54.0 48 243 -50 - 5 18 5 - 5 25 33 - 5 15 0 - 5 28 38 -0.15 60 0 0 - 5 2 6 22 35 46.8 47 243 -49 - 4 58 22 - 5 5 51 - 4 55 17 - 5 8 56 -0.15 61 0 0 - 4 42 7 22 35 39.8 46 243 -48 - 4 38 22 - 4 45 51 - 4 35 17 - 4 48 57 -0.15 62 0 0 - 4 21 51 22 35 32.8 45 243 -47 - 4 18 6 - 4 25 36 - 4 15 0 - 4 28 41 -0.15 63 0 0 - 4 1 19 22 35 26.0 44 243 -46 - 3 57 33 - 4 5 4 - 3 54 27 - 4 8 10 -0.15 64 0 0 - 3 40 31 22 35 19.2 43 243 -45 - 3 36 45 - 3 44 16 - 3 33 39 - 3 47 23 -0.15 65 0 0 - 3 19 28 22 35 12.6 42 243 -44 - 3 15 42 - 3 23 14 - 3 12 35 - 3 26 20 -0.15 66 0 0 - 2 58 9 22 35 6.1 41 243 -43 - 2 54 23 - 3 1 56 - 2 51 16 - 3 5 2 -0.15 67 0 0 - 2 36 36 22 34 59.7 40 243 -42 - 2 32 50 - 2 40 23 - 2 29 43 - 2 43 30 -0.15 68 0 0 - 2 14 49 22 34 53.5 39 243 -41 - 2 11 2 - 2 18 36 - 2 7 55 - 2 21 43 -0.15 69 0 0 - 1 52 48 22 34 47.3 38 243 -40 - 1 49 1 - 1 56 35 - 1 45 53 - 1 59 43 -0.15 70 0 0 - 1 30 33 22 34 41.3 37 243 -39 - 1 26 46 - 1 34 21 - 1 23 38 - 1 37 28 -0.15 71 0 0 - 1 8 5 22 34 35.5 36 243 -38 - 1 4 18 - 1 11 53 - 1 1 10 - 1 15 1 -0.15 72 0 0 - 0 45 25 22 34 29.7 35 243 -37 - 0 41 37 - 0 49 13 - 0 38 29 - 0 52 21 -0.15 73 0 0 - 0 22 32 22 34 24.2 34 243 -36 - 0 18 44 - 0 26 20 - 0 15 36 - 0 29 29 -0.15 74 0 0 0 0 32 22 34 18.7 33 243 -35 0 4 21 - 0 3 16 0 7 29 - 0 6 24 -0.15 75 0 0 0 23 48 22 34 13.4 31 244 -34 0 27 37 0 20 0 0 30 46 0 16 51 -0.15 76 0 0 0 47 15 22 34 8.2 30 244 -33 0 51 4 0 43 27 0 54 13 0 40 18 -0.15 77 0 0 1 10 53 22 34 3.2 29 244 -32 1 14 42 1 7 4 1 17 51 1 3 54 -0.15 78 0 0 1 34 40 22 33 58.4 28 244 -31 1 38 29 1 30 51 1 41 39 1 27 41 -0.15 79 0 0 1 58 37 22 33 53.7 27 244 -30 2 2 26 1 54 47 2 5 36 1 51 38 -0.15 80 0 0 2 22 42 22 33 49.2 26 244 -29 2 26 32 2 18 52 2 29 42 2 15 43 -0.15 81 0 0 2 46 56 22 33 44.8 25 244 -28 2 50 46 2 43 6 2 53 56 2 39 56 -0.15 82 0 0 3 11 18 22 33 40.6 24 244 -27 3 15 8 3 7 28 3 18 18 3 4 18 -0.15 83 0 0 3 35 47 22 33 36.5 23 244 -26 3 39 37 3 31 57 3 42 48 3 28 47 -0.15 84 0 0 4 0 23 22 33 32.7 22 244 -24 4 4 13 3 56 33 4 7 24 3 53 22 -0.15 85 0 0 4 25 5 22 33 29.0 21 244 -23 4 28 56 4 21 15 4 32 6 4 18 4 -0.15 86 0 0 4 49 53 22 33 25.4 20 244 -22 4 53 44 4 46 2 4 56 54 4 42 52 -0.15 87 0 0 5 14 46 22 33 22.1 19 244 -21 5 18 37 5 10 55 5 21 47 5 7 44 -0.15 88 0 0 5 39 43 22 33 18.9 18 245 -20 5 43 34 5 35 52 5 46 45 5 32 41 -0.15 89 0 0 6 4 44 22 33 15.9 17 245 -19 6 8 35 6 0 53 6 11 46 5 57 42 -0.15 90 0 0 6 29 49 22 33 13.1 16 245 -18 6 33 40 6 25 58 6 36 51 6 22 47 -0.15 91 0 0 6 54 56 22 33 10.4 15 245 -17 6 58 47 6 51 5 7 1 59 6 47 54 -0.15 92 0 0 7 20 6 22 33 8.0 13 245 -16 7 23 57 7 16 14 7 27 8 7 13 3 -0.15 93 0 0 7 45 17 22 33 5.7 12 245 -15 7 49 8 7 41 25 7 52 19 7 38 14 -0.15 94 0 0 8 10 28 22 33 3.6 11 245 -14 8 14 20 8 6 37 8 17 31 8 3 26 -0.15 95 0 0 8 35 40 22 33 1.7 10 246 -13 8 39 32 8 31 49 8 42 43 8 28 38 -0.15 96 0 0 9 0 52 22 33 0.0 9 246 -12 9 4 44 8 57 1 9 7 55 8 53 49 -0.15 97 0 0 9 26 3 22 32 58.5 8 246 -11 9 29 55 9 22 11 9 33 6 9 19 0 -0.15 98 0 0 9 51 12 22 32 57.1 7 246 -10 9 55 4 9 47 21 9 58 15 9 44 10 -0.15 99 0 0 10 16 19 22 32 56.0 6 246 -8 10 20 11 10 12 28 10 23 22 10 9 17 -0.15 100 0 0 10 41 23 22 32 55.0 5 246 -7 10 45 15 10 37 32 10 48 26 10 34 21 -0.14 101 0 0 11 6 24 22 32 54.2 4 247 -6 11 10 16 11 2 33 11 13 27 10 59 22 -0.14 102 0 0 11 31 21 22 32 53.7 3 247 -5 11 35 13 11 27 30 11 38 24 11 24 19 -0.14 103 0 0 11 56 13 22 32 53.3 2 247 -4 12 0 5 11 52 22 12 3 16 11 49 11 -0.12 104 0 0 12 21 0 22 32 53.0 1 247 -3 12 24 52 12 17 9 12 28 3 12 13 58 -0.07 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 340-160830 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 36 37.0224 DE: -22 09 38.419 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 36 37.0224 DE: -22 09 38.419 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 12.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (8008) 1988 TQ4 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.010 distance from Earth [AU]: 1.81340 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.019", 0.004", 86.668° remarks: * orbital elements for (8008)1988 TQ4 : Mean anomaly = 261.7509640101 deg Arg. of pericenter = 258.3367241779 deg Long. of node = 128.1693427432 deg Inclination = 1.3489255498 deg Eccentricity = 0.0791453488 Semimajor axis = 2.7809675770 AU Perihelion dist = 2.5608669280 AU Mag: H = 13.35, G = 0.15 Epoch of elements : MJD 60493.94569446 TDT (2024 Jul 02.9457) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,1.10,2024,7,2,22.696668,-0.013491,0.138216,-6.631219,-0.647177,0.000248,-0.000084,0.000001,0.000000 17.6208,-22.1405,-159.38,22.94,False UCAC4 340-160830,18.61028401,-22.1606718,12.25,11.16,10.57,0.1,0,,18.63521993,-22.1405064,5.89,6.03,0,0,0 8008,1988 TQ4,17.05,12.948,1.8134,0,0,-2.314,-3.14,,1.2,0 0,261.5500,2024,7,2,258.3367,128.1693,1.3489,0.07915,2.78097,2.56087,13.34,5.0,0.15 1.413,0.0190,0.0040,87,0.0041,Known errors,0.72,0,-1,-1 20240702_160830,60140.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org