IOTA/IOTA-ES occultation update for (704) Interamnia / UCAC4 603-024059 event on 2023 Dec 17, 03:26 UT Visible from Europe, SE Canada, USA, Mexico Summary ------- On 2023 Dec 17 UT, the 329.3 km diameter asteroid (704) Interamnia will occult a 12.1 mag star in the constellation Auriga for observers along a path across Europe, SE Canada, USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.17 mag to 10.16 mag (the magnitude of the asteroid) for at most 23.640 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: 100 * date and approx. time of event: 2023 Dec 17, 03:18 - 2023 Dec 17, 03:33 * geocentric midpoint of event [JD]: 2460295.64323917 * magnitude of target star: 12.12 * magnitude drop [mag]: 0.17 * estimated maximum duration [s]: 23.640 * Moon: 22 % sunlit, 126° distance * Sun: 173° distance * rough path description: Europe, SE Canada, USA, Mexico Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 356 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 105°) * approx speed of asteroid's shadow [km/s]: 13.9315 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 603-024059 by 704 Interamnia on 2023 Dec 17 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 0 0 0 .. .. .... .. .. .. .. .. .. 0 10 38 .. .. .. 0 17 38 .. .. .. .... -142 0 0 - 1 5 52 3 33 18.6 1 60 -2 0 46 54 - 2 56 58 0 53 57 .. .. .. .... -141 0 0 - 0 29 28 3 33 18.3 2 60 -3 1 23 53 - 2 21 6 1 30 57 - 2 27 58 -0.37 -140 0 0 0 7 37 3 33 17.8 3 60 -4 2 1 32 - 1 44 34 2 8 39 - 1 51 27 -0.38 -139 0 0 0 45 23 3 33 17.2 4 60 -5 2 39 52 - 1 7 21 2 47 1 - 1 14 17 -0.38 -138 0 0 1 23 49 3 33 16.3 6 60 -6 3 18 52 - 0 29 28 3 26 4 - 0 36 26 -0.38 -137 0 0 2 2 53 3 33 15.2 7 60 -8 3 58 31 0 9 3 4 5 45 0 2 3 -0.39 -136 0 0 2 42 35 3 33 13.8 8 60 -9 4 38 48 0 48 13 4 46 4 0 41 11 -0.39 -135 0 0 3 22 55 3 33 12.3 9 60 -10 5 19 42 1 27 59 5 27 0 1 20 55 -0.39 -134 0 0 4 3 51 3 33 10.5 10 60 -11 6 1 12 2 8 22 6 8 32 2 1 17 -0.39 -133 0 0 4 45 22 3 33 8.5 12 60 -12 6 43 17 2 49 21 6 50 40 2 42 13 -0.39 -132 0 0 5 27 27 3 33 6.3 13 60 -13 7 25 57 3 30 54 7 33 21 3 23 44 -0.39 -131 0 0 6 10 5 3 33 3.9 14 60 -15 8 9 9 4 13 0 8 16 35 4 5 48 -0.39 -130 0 0 6 53 15 3 33 1.2 15 60 -16 8 52 52 4 55 38 9 0 21 4 48 24 -0.39 -129 0 0 7 36 55 3 32 58.4 16 60 -17 9 37 5 5 38 47 9 44 36 5 31 31 -0.39 -128 0 0 8 21 5 3 32 55.3 18 61 -18 10 21 47 6 22 25 10 29 21 6 15 8 -0.39 -127 0 0 9 5 42 3 32 51.9 19 61 -19 11 6 57 7 6 32 11 14 32 6 59 13 -0.39 -126 0 0 9 50 45 3 32 48.4 20 61 -21 11 52 32 7 51 6 12 0 9 7 43 45 -0.39 -125 0 0 10 36 14 3 32 44.7 21 61 -22 12 38 31 8 36 5 12 46 10 8 28 42 -0.39 -124 0 0 11 22 5 3 32 40.7 22 62 -23 13 24 53 9 21 27 13 32 34 9 14 3 -0.39 -123 0 0 12 8 18 3 32 36.5 24 62 -24 14 11 35 10 7 12 14 19 18 9 59 46 -0.39 -122 0 0 12 54 51 3 32 32.1 25 62 -25 14 58 37 10 53 18 15 6 21 10 45 50 -0.39 -121 0 0 13 41 41 3 32 27.6 26 62 -26 15 45 55 11 39 42 15 53 42 11 32 13 -0.39 -120 0 0 14 28 48 3 32 22.8 27 63 -28 16 33 29 12 26 24 16 41 17 12 18 53 -0.39 -119 0 0 15 16 9 3 32 17.8 28 63 -29 17 21 16 13 13 21 17 29 6 13 5 48 -0.39 -118 0 0 16 3 43 3 32 12.6 30 64 -30 18 9 15 14 0 31 18 17 7 13 52 57 -0.39 -117 0 0 16 51 28 3 32 7.2 31 64 -31 18 57 23 14 47 53 19 5 17 14 40 18 -0.39 -116 0 0 17 39 21 3 32 1.7 32 65 -32 19 45 39 15 35 25 19 53 34 15 27 49 -0.40 -115 0 0 18 27 20 3 31 56.0 33 65 -33 20 34 0 16 23 5 20 41 56 16 15 27 -0.40 -114 0 0 19 15 25 3 31 50.1 34 66 -34 21 22 25 17 10 50 21 30 22 17 3 12 -0.40 -113 0 0 20 3 32 3 31 44.1 36 66 -35 22 10 51 17 58 40 22 18 50 17 51 0 -0.40 -112 0 0 20 51 40 3 31 37.9 37 67 -36 22 59 17 18 46 31 23 7 16 18 38 51 -0.40 -111 0 0 21 39 47 3 31 31.5 38 67 -38 23 47 39 19 34 23 23 55 40 19 26 42 -0.40 -110 0 0 22 27 50 3 31 25.0 39 68 -39 24 35 57 20 22 13 24 43 59 20 14 30 -0.40 -109 0 0 23 15 48 3 31 18.4 40 69 -40 25 24 9 21 9 59 25 32 11 21 2 15 -0.40 -108 0 0 24 3 38 3 31 11.7 41 70 -41 26 12 11 21 57 39 26 20 14 21 49 55 -0.40 -107 0 0 24 51 20 3 31 4.8 42 70 -42 27 0 2 22 45 11 27 8 6 22 37 26 -0.40 -106 0 0 25 38 50 3 30 57.9 43 71 -43 27 47 41 23 32 33 27 55 45 23 24 48 -0.40 -105 0 0 26 26 7 3 30 50.8 44 72 -44 28 35 5 24 19 44 28 43 10 24 11 59 -0.40 -104 0 0 27 13 9 3 30 43.6 46 73 -45 29 22 12 25 6 41 29 30 18 24 58 56 -0.40 -103 0 0 27 59 54 3 30 36.4 47 74 -46 30 9 1 25 53 23 30 17 7 25 45 38 -0.40 -102 0 0 28 46 21 3 30 29.1 48 75 -46 30 55 30 26 39 48 31 3 35 26 32 3 -0.40 -101 0 0 29 32 27 3 30 21.7 49 76 -47 31 41 36 27 25 54 31 49 42 27 18 9 -0.40 -100 0 0 30 18 11 3 30 14.3 50 77 -48 32 27 19 28 11 40 32 35 25 28 3 55 -0.40 - 99 0 0 31 3 32 3 30 6.8 51 78 -49 33 12 37 28 57 4 33 20 43 28 49 19 -0.40 - 98 0 0 31 48 27 3 29 59.3 52 80 -50 33 57 28 29 42 4 34 5 33 29 34 19 -0.40 - 97 0 0 32 32 56 3 29 51.8 52 81 -51 34 41 50 30 26 39 34 49 55 30 18 55 -0.40 - 96 0 0 33 16 57 3 29 44.2 53 82 -51 35 25 43 31 10 48 35 33 47 31 3 4 -0.41 - 95 0 0 34 0 29 3 29 36.6 54 84 -52 36 9 5 31 54 28 36 17 9 31 46 45 -0.41 - 94 0 0 34 43 29 3 29 29.1 55 85 -53 36 51 55 32 37 40 36 59 58 32 29 57 -0.41 - 93 0 0 35 25 58 3 29 21.5 56 86 -54 37 34 11 33 20 21 37 42 13 33 12 39 -0.41 - 92 0 0 36 7 54 3 29 13.9 57 88 -54 38 15 53 34 2 31 38 23 54 33 54 49 -0.41 - 91 0 0 36 49 16 3 29 6.3 58 90 -55 38 56 59 34 44 7 39 4 59 34 36 27 -0.41 - 90 0 0 37 30 3 3 28 58.8 58 91 -56 39 37 29 35 25 11 39 45 28 35 17 31 -0.41 - 89 0 0 38 10 14 3 28 51.2 59 93 -56 40 17 22 36 5 40 40 25 20 35 58 1 -0.41 - 88 0 0 38 49 49 3 28 43.7 60 95 -57 40 56 37 36 45 33 41 4 33 36 37 56 -0.41 - 87 0 0 39 28 47 3 28 36.3 60 97 -57 41 35 13 37 24 51 41 43 8 37 17 15 -0.41 - 86 0 0 40 7 6 3 28 28.9 61 99 -58 42 13 10 38 3 32 42 21 4 37 55 57 -0.41 - 85 0 0 40 44 47 3 28 21.5 62 101 -58 42 50 28 38 41 35 42 58 20 38 34 2 -0.41 - 84 0 0 41 21 50 3 28 14.2 62 103 -59 43 27 5 39 19 1 43 34 56 39 11 29 -0.41 - 83 0 0 41 58 12 3 28 6.9 63 105 -59 44 3 2 39 55 48 44 10 51 39 48 18 -0.41 - 82 0 0 42 33 56 3 27 59.7 63 107 -59 44 38 18 40 31 57 44 46 6 40 24 28 -0.41 - 81 0 0 43 8 59 3 27 52.5 64 109 -60 45 12 54 41 7 26 45 20 39 40 59 59 -0.41 - 80 0 0 43 43 22 3 27 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6 6 -0.45 61 0 0 43 40 13 3 19 17.2 7 306 -1 45 44 20 41 38 23 45 52 7 41 30 54 -0.45 62 0 0 43 4 51 3 19 16.3 6 307 0 45 9 31 41 2 30 45 17 20 40 54 59 -0.46 63 0 0 42 28 45 3 19 15.4 5 307 0 44 33 57 40 25 54 44 41 48 40 18 21 -0.47 64 0 0 41 51 56 3 19 14.8 4 308 1 43 57 39 39 48 34 44 5 31 39 41 0 -0.49 65 0 0 41 14 22 3 19 14.2 3 309 2 43 20 35 39 10 32 43 28 30 39 2 56 -0.52 66 0 0 40 36 5 3 19 13.8 2 309 3 42 42 48 38 31 47 42 50 44 38 24 9 -0.58 67 0 0 39 57 5 3 19 13.5 1 310 4 42 4 15 .. .. .. 42 12 13 .. .. .. -0.72 68 0 0 39 17 22 3 19 13.4 0 311 5 41 25 0 .. .. .. 41 32 59 .. .. .. -2.33 0 0 0 .. .. .... .. .. .. .. .. .. 40 45 0 .. .. .. 40 53 1 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Nov 13.9 Data for the target star ------------------------ * name: UCAC4 603-024059 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 38 57.4031 DE: +30 25 56.183 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 38 57.4032 DE: +30 25 56.187 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (704) Interamnia asteroid class: ShapeModel approx. diameter [km]: 329 approx. diameter ["]: 0.245 distance from Earth [AU]: 1.85280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#164 date of fit: 2023 Oct 11 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): 0.012", 0.001", 104.516° remarks: * orbital elements for (704)Interamnia : Mean anomaly = 53.9016328759 deg Arg. of pericenter = 94.3237512251 deg Long. of node = 280.1681587225 deg Inclination = 17.3118923039 deg Eccentricity = 0.1557665189 Semimajor axis = 3.0573110341 AU Perihelion dist = 2.5810843370 AU Mag: H = 6.36, G = -0.02 Epoch of elements : MJD 60295.14312500 TDT (2023 Dec 17.1431) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1642023Oct11,23.64,2023,12,17,3.437740,-0.157907,0.348560,-7.166191,-3.236919,-0.000034,-0.000735,0.000002,0.000000 -51.9448,30.4464,127.39,-23.34,False UCAC4 603-024059,5.64927865,30.4322730,0.00,12.12,0.00,0.0,0,,5.67525405,30.4463827,0.17,0.00,0,0,1 704,Interamnia,10.16,329.300,1.8528,0,0,-2.629,-15.36,,16.6,0 0,53.8752,2023,12,17,94.3238,280.1682,17.3119,0.15577,3.05731,2.58108,6.29,5.0,0.15 1.031,0.0120,0.0013,105,0.0121,Known errors,-1.00,0,-1,-1 20231217_024059,60261.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Nov 13, 20:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org