IOTA/IOTA-ES occultation update for (1512) Oulu / HIP 28774 event on 2023 Mar 15, 15:33 UT Visible from SE Asia, India, SW Asia Summary ------- On 2023 Mar 15 UT, the 84.2 km diameter asteroid (1512) Oulu will occult a 9.5 mag star in the constellation Auriga for observers along a path across SE Asia, India, SW Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.10 mag to 16.63 mag (the magnitude of the asteroid) for at most 8.910 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 Mar 15, 15:22 - 2023 Mar 15, 15:45 * geocentric midpoint of event [JD]: 2460019.14846534 * magnitude of target star: 9.53 * magnitude drop [mag]: 7.10 * estimated maximum duration [s]: 8.910 * Moon: 44 % sunlit, 177° distance * Sun: 96° distance * rough path description: SE Asia, India, SW Asia The occultation path -------------------- * approximate projected width [km]: 85 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 89°) * approx speed of asteroid's shadow [km/s]: 9.4490 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 28774 by 1512 Oulu on 2023 Mar 15 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 - 57 0 0 25 13 53 15 22 39.2 1 57 62 24 46 10 25 41 39 24 39 44 25 48 6 .... - 56 0 0 25 49 46 15 22 39.5 2 57 61 25 22 8 26 17 26 25 15 42 26 23 53 -0.21 - 55 0 0 26 25 7 15 22 40.1 3 58 61 25 57 34 26 52 42 25 51 10 26 59 8 -0.20 - 54 0 0 26 59 56 15 22 40.9 4 58 61 26 32 28 27 27 26 26 26 5 27 33 50 -0.19 - 53 0 0 27 34 12 15 22 41.9 5 58 60 27 6 50 28 1 37 27 0 28 28 8 0 -0.18 - 52 0 0 28 7 55 15 22 43.1 6 59 60 27 40 38 28 35 14 27 34 18 28 41 36 -0.18 - 51 0 0 28 41 4 15 22 44.5 7 59 59 28 13 53 29 8 17 28 7 34 29 14 38 -0.18 - 50 0 0 29 13 39 15 22 46.2 8 60 59 28 46 33 29 40 46 28 40 16 29 47 5 -0.17 - 49 0 0 29 45 38 15 22 48.0 9 60 58 29 18 39 30 12 40 29 12 23 30 18 58 -0.17 - 48 0 0 30 17 3 15 22 50.1 10 61 58 29 50 10 30 43 59 29 43 55 30 50 15 -0.17 - 47 0 0 30 47 53 15 22 52.3 11 61 57 30 21 5 31 14 42 30 14 52 31 20 57 -0.17 - 46 0 0 31 18 6 15 22 54.8 12 62 57 30 51 25 31 44 50 30 45 13 31 51 3 -0.17 - 45 0 0 31 47 44 15 22 57.4 13 62 56 31 21 9 32 14 22 31 14 58 32 20 34 -0.17 - 44 0 0 32 16 46 15 23 0.2 14 63 55 31 50 17 32 43 17 31 44 8 32 49 28 -0.17 - 43 0 0 32 45 12 15 23 3.1 15 64 55 32 18 49 33 11 37 32 12 41 33 17 46 -0.17 - 42 0 0 33 13 1 15 23 6.2 16 64 54 32 46 45 33 39 20 32 40 38 33 45 27 -0.17 - 41 0 0 33 40 14 15 23 9.5 17 65 54 33 14 4 34 6 27 33 7 59 34 12 33 -0.17 - 40 0 0 34 6 51 15 23 13.0 18 65 53 33 40 47 34 32 57 33 34 43 34 39 2 -0.16 - 39 0 0 34 32 51 15 23 16.5 19 66 52 34 6 54 34 58 51 34 0 51 35 4 54 -0.16 - 38 0 0 34 58 15 15 23 20.3 20 66 52 34 32 24 35 24 9 34 26 23 35 30 10 -0.16 - 37 0 0 35 23 3 15 23 24.1 21 67 51 34 57 18 35 48 50 34 51 19 35 54 50 -0.16 - 36 0 0 35 47 15 15 23 28.1 22 68 50 35 21 35 36 12 56 35 15 38 36 18 54 -0.16 - 35 0 0 36 10 50 15 23 32.2 23 68 50 35 45 17 36 36 25 35 39 21 36 42 22 -0.16 - 34 0 0 36 33 49 15 23 36.5 24 69 49 36 8 23 36 59 18 36 2 28 37 5 14 -0.16 - 33 0 0 36 56 13 15 23 40.8 24 69 48 36 30 52 37 21 36 36 24 59 37 27 30 -0.16 - 32 0 0 37 18 1 15 23 45.3 25 70 48 36 52 46 37 43 18 36 46 54 37 49 11 -0.16 - 31 0 0 37 39 14 15 23 49.9 26 71 47 37 14 5 38 4 24 37 8 14 38 10 16 -0.16 - 30 0 0 37 59 51 15 23 54.6 27 71 46 37 34 48 38 24 56 37 28 59 38 30 46 -0.16 - 29 0 0 38 19 53 15 23 59.4 28 72 46 37 54 56 38 44 52 37 49 8 38 50 41 -0.16 - 28 0 0 38 39 21 15 24 4.3 29 73 45 38 14 29 39 4 14 38 8 42 39 10 2 -0.16 - 27 0 0 38 58 14 15 24 9.3 30 73 44 38 33 27 39 23 1 38 27 42 39 28 48 -0.16 - 26 0 0 39 16 32 15 24 14.4 31 74 44 38 51 51 39 41 14 38 46 7 39 46 59 -0.16 - 25 0 0 39 34 16 15 24 19.5 31 75 43 39 9 41 39 58 53 39 3 58 40 4 37 -0.16 - 24 0 0 39 51 27 15 24 24.8 32 76 42 39 26 57 40 15 59 39 21 15 40 21 41 -0.15 - 23 0 0 40 8 4 15 24 30.2 33 76 42 39 43 39 40 32 30 39 37 58 40 38 12 -0.15 - 22 0 0 40 24 7 15 24 35.6 34 77 41 39 59 47 40 48 29 39 54 8 40 54 9 -0.15 - 21 0 0 40 39 37 15 24 41.1 35 78 40 40 15 22 41 3 54 40 9 44 41 9 33 -0.15 - 20 0 0 40 54 35 15 24 46.7 35 78 40 40 30 24 41 18 47 40 24 47 41 24 24 -0.15 - 19 0 0 41 8 59 15 24 52.3 36 79 39 40 44 54 41 33 7 40 39 18 41 38 43 -0.15 - 18 0 0 41 22 52 15 24 58.1 37 80 38 40 58 51 41 46 54 40 53 16 41 52 30 -0.15 - 17 0 0 41 36 12 15 25 3.9 38 81 38 41 12 15 42 0 10 41 6 41 42 5 45 -0.15 - 16 0 0 41 49 0 15 25 9.7 39 81 37 41 25 8 42 12 54 41 19 35 42 18 28 -0.15 - 15 0 0 42 1 17 15 25 15.7 39 82 36 41 37 28 42 25 7 41 31 56 42 30 40 -0.15 - 14 0 0 42 13 2 15 25 21.7 40 83 36 41 49 18 42 36 48 41 43 46 42 42 20 -0.15 - 13 0 0 42 24 16 15 25 27.8 41 84 35 42 0 35 42 47 59 41 55 5 42 53 30 -0.15 - 12 0 0 42 34 59 15 25 33.9 42 84 34 42 11 22 42 58 38 42 5 53 43 4 8 -0.15 - 11 0 0 42 45 12 15 25 40.1 43 85 34 42 21 38 43 8 47 42 16 9 43 14 16 -0.15 - 10 0 0 42 54 54 15 25 46.4 43 86 33 42 31 23 43 18 25 42 25 55 43 23 54 -0.15 - 9 0 0 43 4 5 15 25 52.7 44 87 32 42 40 38 43 27 33 42 35 11 43 33 1 -0.15 - 8 0 0 43 12 46 15 25 59.0 45 88 32 42 49 22 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44 44 9 43 52 48 44 49 30 -0.14 6 0 0 44 23 2 15 27 34.4 55 100 22 44 0 3 44 46 2 43 54 42 44 51 23 -0.14 7 0 0 44 24 27 15 27 41.6 56 101 22 44 1 28 44 47 26 43 56 8 44 52 47 -0.14 8 0 0 44 25 23 15 27 48.9 56 102 21 44 2 25 44 48 22 43 57 5 44 53 43 -0.14 9 0 0 44 25 51 15 27 56.3 57 103 20 44 2 54 44 48 50 43 57 33 44 54 11 -0.14 10 0 0 44 25 51 15 28 3.7 58 103 20 44 2 53 44 48 50 43 57 33 44 54 11 -0.14 11 0 0 44 25 22 15 28 11.2 59 104 19 44 2 24 44 48 21 43 57 4 44 53 42 -0.14 12 0 0 44 24 24 15 28 18.7 59 106 18 44 1 26 44 47 24 43 56 6 44 52 45 -0.14 13 0 0 44 22 58 15 28 26.4 60 107 18 44 0 0 44 45 58 43 54 39 44 51 19 -0.14 14 0 0 44 21 3 15 28 34.0 61 108 17 43 58 4 44 44 4 43 52 43 44 49 25 -0.14 15 0 0 44 18 40 15 28 41.8 61 109 16 43 55 40 44 41 41 43 50 19 44 47 3 -0.14 16 0 0 44 15 47 15 28 49.5 62 110 15 43 52 46 44 38 50 43 47 25 44 44 11 -0.14 17 0 0 44 12 26 15 28 57.4 63 111 15 43 49 24 44 35 30 43 44 2 44 40 52 -0.14 18 0 0 44 8 36 15 29 5.3 64 112 14 43 45 32 44 31 41 43 40 10 44 37 3 -0.14 19 0 0 44 4 16 15 29 13.3 64 113 13 43 41 11 44 27 23 43 35 49 44 32 45 -0.14 20 0 0 43 59 27 15 29 21.4 65 114 13 43 36 20 44 22 35 43 30 58 44 27 58 -0.14 21 0 0 43 54 9 15 29 29.5 66 116 12 43 31 0 44 17 19 43 25 38 44 22 43 -0.14 22 0 0 43 48 21 15 29 37.8 66 117 11 43 25 10 44 11 33 43 19 47 44 16 57 -0.14 23 0 0 43 42 4 15 29 46.0 67 118 11 43 18 51 44 5 18 43 13 27 44 10 42 -0.14 24 0 0 43 35 16 15 29 54.4 68 120 10 43 12 1 43 58 33 43 6 36 44 3 58 -0.14 25 0 0 43 27 58 15 30 2.8 69 121 9 43 4 40 43 51 17 42 59 15 43 56 43 -0.14 26 0 0 43 20 10 15 30 11.3 69 122 8 42 56 49 43 43 32 42 51 24 43 48 58 -0.14 27 0 0 43 11 51 15 30 19.9 70 124 8 42 48 28 43 35 16 42 43 2 43 40 43 -0.14 28 0 0 43 3 2 15 30 28.6 71 126 7 42 39 35 43 26 30 42 34 8 43 31 58 -0.14 29 0 0 42 53 41 15 30 37.3 71 127 6 42 30 11 43 17 13 42 24 44 43 22 41 -0.14 30 0 0 42 43 49 15 30 46.1 72 129 6 42 20 16 43 7 24 42 14 48 43 12 53 -0.14 31 0 0 42 33 26 15 30 55.0 73 131 5 42 9 49 42 57 4 42 4 20 43 2 34 -0.14 32 0 0 42 22 31 15 31 4.0 73 133 4 41 58 50 42 46 13 41 53 20 42 51 44 -0.14 33 0 0 42 11 3 15 31 13.1 74 135 3 41 47 19 42 34 49 41 41 47 42 40 21 -0.14 34 0 0 41 59 3 15 31 22.2 75 137 3 41 35 14 42 22 53 41 29 42 42 28 26 -0.14 35 0 0 41 46 30 15 31 31.4 75 139 2 41 22 37 42 10 25 41 17 4 42 15 59 -0.14 36 0 0 41 33 25 15 31 40.8 76 142 1 41 9 27 41 57 23 41 3 53 42 2 58 -0.14 37 0 0 41 19 46 15 31 50.2 77 145 0 40 55 44 41 43 49 40 50 8 41 49 25 -0.14 38 0 0 41 5 33 15 31 59.7 77 148 0 40 41 26 41 29 41 40 35 50 41 35 18 -0.14 39 0 0 40 50 46 15 32 9.3 78 151 -1 40 26 34 41 14 59 40 20 57 41 20 37 -0.14 40 0 0 40 35 24 15 32 19.0 79 155 -2 40 11 8 40 59 42 40 5 29 41 5 22 -0.15 41 0 0 40 19 28 15 32 28.7 79 159 -3 39 55 7 40 43 52 39 49 27 40 49 32 -0.15 42 0 0 40 2 57 15 32 38.6 80 163 -4 39 38 30 40 27 26 39 32 49 40 33 8 -0.15 43 0 0 39 45 51 15 32 48.5 80 168 -4 39 21 18 40 10 25 39 15 36 40 16 8 -0.15 44 0 0 39 28 8 15 32 58.6 80 173 -5 39 3 30 39 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11 19 33 -0.17 96 0 0 9 57 45 15 42 40.2 37 300 -59 9 28 33 10 26 59 9 21 46 10 33 48 -0.17 97 0 0 9 11 57 15 42 49.1 35 301 -60 8 42 46 9 41 10 8 35 59 9 47 59 -0.17 98 0 0 8 26 7 15 42 57.7 34 301 -61 7 56 57 8 55 20 7 50 11 9 2 8 -0.17 99 0 0 7 40 18 15 43 6.1 33 301 -62 7 11 10 8 9 29 7 4 23 8 16 17 -0.17 100 0 0 6 54 31 15 43 14.2 32 301 -63 6 25 25 7 23 41 6 18 39 7 30 28 -0.18 101 0 0 6 8 49 15 43 22.0 30 302 -64 5 39 45 6 37 57 5 33 0 6 44 43 -0.18 102 0 0 5 23 14 15 43 29.5 29 302 -65 4 54 12 5 52 19 4 47 27 5 59 5 -0.18 103 0 0 4 37 47 15 43 36.7 28 302 -67 4 8 48 5 6 49 4 2 4 5 13 34 -0.18 104 0 0 3 52 30 15 43 43.6 27 302 -68 3 23 34 4 21 29 3 16 51 4 28 14 -0.18 105 0 0 3 7 25 15 43 50.2 25 302 -69 2 38 33 3 36 21 2 31 50 3 43 5 -0.18 106 0 0 2 22 34 15 43 56.5 24 302 -70 1 53 46 2 51 26 1 47 4 2 58 9 -0.18 107 0 0 1 37 59 15 44 2.4 23 302 -71 1 9 14 2 6 47 1 2 34 2 13 29 -0.18 108 0 0 0 53 41 15 44 8.1 21 302 -72 0 25 1 1 22 25 0 18 21 1 29 6 -0.18 109 0 0 0 9 42 15 44 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Uncertainty in time = +/- 3 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: HIP 28774 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 04 32.8699 DE: +30 14 18.287 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 04 32.8698 DE: +30 14 18.287 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1512) Oulu asteroid class: approx. diameter [km]: 84 approx. diameter ["]: 0.028 distance from Earth [AU]: 4.15980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 07 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): 0.008", 0.002", 89.346° remarks: * orbital elements for (1512)Oulu : Mean anomaly = 226.8950056527 deg Arg. of pericenter = 237.6765934434 deg Long. of node = 10.0466301766 deg Inclination = 6.4685663584 deg Eccentricity = 0.1422181971 Semimajor axis = 3.9626325157 AU Perihelion dist = 3.3990740635 AU Mag: H = 9.54, G = 0.15 Epoch of elements : MJD 60018.64854167 TDT (2023 Mar 15.6485) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb07,8.91,2023,3,15,15.563168,0.050274,0.131357,4.985399,-1.894719,0.005982,-0.000146,0.000000,0.000000 45.0795,30.2383,-51.21,-2.07,False HIP 28774,6.07579722,30.2384130,0.00,9.53,0.00,0.0,0,,6.10048653,30.2382969,7.10,0.00,0,0,0 1512,Oulu,16.63,84.2,4.1598,0,0,0.814,-4.01,,4.6,0 0,226.8140,2023,3,15,237.6766,10.0466,6.4686,0.14222,3.96263,3.39907,9.56,5.0,0.15 1.116,0.0080,0.0015,89,0.0032,Known errors,-1.00,-1,-1,-1 20230315__28774,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org