IOTA/IOTA-ES occultation update for (1041) Asta / TYC 7360-01804-1 event on 2023 Jul 10, 09:02 UT Visible from New Zealand, Australia Summary ------- On 2023 Jul 10 UT, the 57.5 km diameter asteroid (1041) Asta will occult a 10.4 mag star in the constellation Scorpius for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.98 mag to 15.39 mag (the magnitude of the asteroid) for at most 5.350 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: 2023 Jul 10, 08:52 - 2023 Jul 10, 09:13 * geocentric midpoint of event [JD]: 2460135.87709383 * magnitude of target star: 10.42 * magnitude drop [mag]: 4.98 * estimated maximum duration [s]: 5.350 * Moon: 47 % sunlit, 124° distance * Sun: 148° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 58 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.002", 111°) * approx speed of asteroid's shadow [km/s]: 10.7453 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7360-01804-1 by 1041 Asta on 2023 Jul 10 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 97 0 0 - 3 43 5 9 12 54.2 1 121 31 - 3 24 52 - 4 1 19 - 3 14 9 - 4 12 2 .... 98 0 0 - 4 19 29 9 12 54.0 2 121 30 - 4 1 16 - 4 37 42 - 3 50 33 - 4 48 25 0.10 99 0 0 - 4 55 45 9 12 53.5 3 121 29 - 4 37 33 - 5 13 58 - 4 26 51 - 5 24 40 0.07 100 0 0 - 5 31 53 9 12 52.7 4 121 28 - 5 13 42 - 5 50 5 - 5 3 0 - 6 0 46 0.05 101 0 0 - 6 7 52 9 12 51.8 5 121 27 - 5 49 41 - 6 26 2 - 5 39 0 - 6 36 43 0.04 102 0 0 - 6 43 40 9 12 50.5 6 121 26 - 6 25 31 - 7 1 49 - 6 14 50 - 7 12 30 0.04 103 0 0 - 7 19 17 9 12 49.1 8 121 24 - 7 1 9 - 7 37 25 - 6 50 29 - 7 48 4 0.03 104 0 0 - 7 54 41 9 12 47.4 9 120 23 - 7 36 34 - 8 12 48 - 7 25 56 - 8 23 26 0.03 105 0 0 - 8 29 52 9 12 45.5 10 120 22 - 8 11 47 - 8 47 57 - 8 1 9 - 8 58 35 0.03 106 0 0 - 9 4 48 9 12 43.4 11 120 21 - 8 46 45 - 9 22 52 - 8 36 8 - 9 33 29 0.03 107 0 0 - 9 39 29 9 12 41.0 12 120 20 - 9 21 27 - 9 57 32 - 9 10 51 -10 8 8 0.02 108 0 0 -10 13 54 9 12 38.4 13 120 19 - 9 55 54 -10 31 55 - 9 45 19 -10 42 30 0.02 109 0 0 -10 48 3 9 12 35.6 14 120 18 -10 30 4 -11 6 1 -10 19 30 -11 16 35 0.02 110 0 0 -11 21 53 9 12 32.6 15 119 16 -11 3 56 -11 39 49 -10 53 23 -11 50 22 0.02 111 0 0 -11 55 24 9 12 29.4 17 119 15 -11 37 30 -12 13 19 -11 26 58 -12 23 51 0.02 112 0 0 -12 28 37 9 12 26.0 18 119 14 -12 10 44 -12 46 29 -12 0 14 -12 57 0 0.02 113 0 0 -13 1 29 9 12 22.4 19 119 13 -12 43 38 -13 19 19 -12 33 9 -13 29 49 0.02 114 0 0 -13 34 0 9 12 18.7 20 119 12 -13 16 12 -13 51 49 -13 5 44 -14 2 17 0.02 115 0 0 -14 6 10 9 12 14.7 21 118 11 -13 48 24 -14 23 56 -13 37 58 -14 34 23 0.02 116 0 0 -14 37 58 9 12 10.5 22 118 10 -14 20 15 -14 55 42 -14 9 49 -15 6 7 0.02 117 0 0 -15 9 24 9 12 6.2 23 118 9 -14 51 42 -15 27 5 -14 41 18 -15 37 29 0.02 118 0 0 -15 40 26 9 12 1.7 24 118 8 -15 22 47 -15 58 5 -15 12 25 -16 8 27 0.02 119 0 0 -16 11 4 9 11 57.1 25 117 7 -15 53 28 -16 28 41 -15 43 7 -16 39 2 0.02 120 0 0 -16 41 19 9 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28 -16 49 36 -16 4 9 -16 59 55 0.02 -105 0 0 -16 1 49 8 54 38.0 32 243 -63 -15 44 13 -16 19 25 -15 33 52 -16 29 46 0.02 -104 0 0 -15 31 12 8 54 32.2 31 243 -62 -15 13 34 -15 48 51 -15 3 12 -15 59 13 0.02 -103 0 0 -15 0 13 8 54 26.6 30 242 -61 -14 42 32 -15 17 54 -14 32 8 -15 28 17 0.02 -102 0 0 -14 28 50 8 54 21.1 29 242 -60 -14 11 7 -14 46 33 -14 0 42 -14 56 59 0.02 -101 0 0 -13 57 6 8 54 15.8 28 242 -59 -13 39 20 -14 14 51 -13 28 54 -14 25 18 0.02 -100 0 0 -13 25 0 8 54 10.6 27 242 -58 -13 7 12 -13 42 48 -12 56 45 -13 53 15 0.02 - 99 0 0 -12 52 33 8 54 5.6 25 241 -57 -12 34 43 -13 10 23 -12 24 15 -13 20 52 0.02 - 98 0 0 -12 19 46 8 54 0.8 24 241 -56 -12 1 54 -12 37 38 -11 51 24 -12 48 8 0.02 - 97 0 0 -11 46 39 8 53 56.2 23 241 -55 -11 28 46 -12 4 33 -11 18 15 -12 15 4 0.02 - 96 0 0 -11 13 14 8 53 51.7 22 241 -54 -10 55 18 -11 31 10 -10 44 46 -11 41 42 0.02 - 95 0 0 -10 39 31 8 53 47.5 21 241 -53 -10 21 33 -10 57 28 -10 11 0 -11 8 2 0.02 - 94 0 0 -10 5 30 8 53 43.4 20 240 -52 - 9 47 31 -10 23 29 - 9 36 56 -10 34 4 0.02 - 93 0 0 - 9 31 13 8 53 39.5 19 240 -50 - 9 13 12 - 9 49 13 - 9 2 36 - 9 59 49 0.02 - 92 0 0 - 8 56 40 8 53 35.9 18 240 -49 - 8 38 37 - 9 14 42 - 8 28 1 - 9 25 18 0.02 - 91 0 0 - 8 21 52 8 53 32.4 17 240 -48 - 8 3 48 - 8 39 56 - 7 53 11 - 8 50 33 0.02 - 90 0 0 - 7 46 50 8 53 29.2 15 240 -47 - 7 28 45 - 8 4 56 - 7 18 7 - 8 15 34 0.02 - 89 0 0 - 7 11 36 8 53 26.1 14 240 -46 - 6 53 29 - 7 29 42 - 6 42 50 - 7 40 21 0.02 - 88 0 0 - 6 36 9 8 53 23.3 13 240 -45 - 6 18 1 - 6 54 17 - 6 7 22 - 7 4 57 0.02 - 87 0 0 - 6 0 32 8 53 20.7 12 239 -44 - 5 42 23 - 6 18 41 - 5 31 43 - 6 29 21 0.02 - 86 0 0 - 5 24 44 8 53 18.4 11 239 -43 - 5 6 34 - 5 42 54 - 4 55 53 - 5 53 35 0.03 - 85 0 0 - 4 48 47 8 53 16.2 10 239 -41 - 4 30 37 - 5 6 58 - 4 19 55 - 5 17 39 0.03 - 84 0 0 - 4 12 43 8 53 14.3 9 239 -40 - 3 54 31 - 4 30 54 - 3 43 50 - 4 41 36 0.03 - 83 0 0 - 3 36 31 8 53 12.7 7 239 -39 - 3 18 19 - 3 54 44 - 3 7 37 - 4 5 26 0.03 - 82 0 0 - 3 0 14 8 53 11.2 6 239 -38 - 2 42 2 - 3 18 27 - 2 31 19 - 3 29 9 0.04 - 81 0 0 - 2 23 52 8 53 10.0 5 239 -37 - 2 5 39 - 2 42 6 - 1 54 57 - 2 52 48 0.04 - 80 0 0 - 1 47 27 8 53 9.1 4 239 -36 - 1 29 14 - 2 5 40 - 1 18 31 - 2 16 23 0.05 - 79 0 0 - 1 10 59 8 53 8.4 3 239 -34 - 0 52 46 - 1 29 13 - 0 42 3 - 1 39 56 0.07 - 78 0 0 - 0 34 30 8 53 8.0 2 239 -33 - 0 16 17 - 0 52 44 - 0 5 34 - 1 3 27 0.12 - 77 0 0 0 1 59 8 53 7.7 0 239 -32 0 20 13 - 0 16 15 0 30 55 - 0 26 57 0.46 Uncertainty in time = +/- 4 secs Prediction of 2023 May 14.2 Data for the target star ------------------------ * name: TYC 7360-01804-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 57 38.0326 DE: -31 05 14.677 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 57 38.0325 DE: -31 05 14.677 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1041) Asta asteroid class: approx. diameter [km]: 58 approx. diameter ["]: 0.032 distance from Earth [AU]: 2.46520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.023", 0.002", 111.374° remarks: * orbital elements for (1041)Asta : Mean anomaly = 234.1166880369 deg Arg. of pericenter = 344.2371267584 deg Long. of node = 59.9742476429 deg Inclination = 13.9387772323 deg Eccentricity = 0.1455103982 Semimajor axis = 3.0711516880 AU Perihelion dist = 2.6242671830 AU Mag: H = 10.17, G = 0.15 Epoch of elements : MJD 60135.37701389 TDT (2023 Jul 10.3770) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,5.35,2023,7,10,9.050252,0.001261,-0.032021,-6.060851,-0.223486,0.002951,0.000402,0.000001,0.000000 -168.9991,-31.1249,45.59,22.24,False TYC 7360-01804-1,16.96056461,-31.0874102,0.00,10.42,0.00,0.0,0,,16.98591250,-31.1249104,4.98,0.00,0,0,0 1041,Asta,15.39,57.5,2.4652,0,0,-1.683,-0.80,,2.8,0 0,234.0476,2023,7,10,344.2371,59.9742,13.9388,0.14551,3.07115,2.62427,10.18,5.0,0.15 1.294,0.0233,0.0018,111,0.0095,Known errors,-1.00,-1,-1,-1 20230710_1804-1,60078.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 14, 04:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org