IOTA/IOTA-ES occultation update for (678) Fredegundis / HIP 3345 event on 2024 Jan 03, 16:21 UT Visible from Summary ------- On 2024 Jan 03 UT, the 42.0583404301793 km diameter asteroid (678) Fredegundis will occult a 8.8 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.48 mag to 13.29 mag (the magnitude of the asteroid) for at most 2.140 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: 2024 Jan 03, 16:17 - 2024 Jan 03, 16:26 * geocentric midpoint of event [JD]: 2460313.18191900 * magnitude of target star: 8.83 * magnitude drop [mag]: 4.48 * estimated maximum duration [s]: 2.140 * Moon: 55 % sunlit, 170° distance * Sun: 92° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 66°) * approx speed of asteroid's shadow [km/s]: 19.6680 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 3345 by 678 Fredegundis on 2024 Jan 3 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 - 56 0 0 -39 0 27 16 17 7.7 1 75 73 -39 13 37 -38 47 18 -39 16 14 -38 44 42 .... - 55 0 0 -38 48 0 16 17 7.8 1 74 72 -39 1 12 -38 34 51 -39 3 48 -38 32 15 0.29 - 54 0 0 -38 35 20 16 17 7.9 2 74 72 -38 48 32 -38 22 10 -38 51 9 -38 19 33 0.36 - 53 0 0 -38 22 25 16 17 8.2 3 73 72 -38 35 38 -38 9 14 -38 38 15 -38 6 38 0.39 - 52 0 0 -38 9 17 16 17 8.5 4 72 72 -38 22 30 -37 56 4 -38 25 7 -37 53 28 0.41 - 51 0 0 -37 55 54 16 17 8.9 5 72 72 -38 9 8 -37 42 41 -38 11 46 -37 40 5 0.43 - 50 0 0 -37 42 18 16 17 9.3 6 71 71 -37 55 33 -37 29 4 -37 58 10 -37 26 27 0.44 - 49 0 0 -37 28 28 16 17 9.9 6 71 71 -37 41 44 -37 15 13 -37 44 21 -37 12 36 0.44 - 48 0 0 -37 14 24 16 17 10.5 7 70 70 -37 27 41 -37 1 9 -37 30 19 -36 58 32 0.45 - 47 0 0 -37 0 8 16 17 11.2 8 69 70 -37 13 25 -36 46 52 -37 16 3 -36 44 14 0.45 - 46 0 0 -36 45 38 16 17 12.0 9 69 70 -36 58 56 -36 32 21 -37 1 34 -36 29 43 0.46 - 45 0 0 -36 30 55 16 17 12.8 10 68 69 -36 44 14 -36 17 37 -36 46 52 -36 15 0 0.46 - 44 0 0 -36 15 59 16 17 13.8 11 68 69 -36 29 19 -36 2 40 -36 31 57 -36 0 3 0.46 - 43 0 0 -36 0 50 16 17 14.8 11 67 68 -36 14 11 -35 47 31 -36 16 50 -35 44 53 0.46 - 42 0 0 -35 45 29 16 17 15.9 12 66 67 -35 58 51 -35 32 9 -36 1 29 -35 29 31 0.47 - 41 0 0 -35 29 56 16 17 17.1 13 66 67 -35 43 18 -35 16 35 -35 45 57 -35 13 57 0.47 - 40 0 0 -35 14 10 16 17 18.4 14 65 66 -35 27 33 -35 0 49 -35 30 12 -34 58 11 0.47 - 39 0 0 -34 58 13 16 17 19.7 15 65 66 -35 11 37 -34 44 51 -35 14 16 -34 42 12 0.47 - 38 0 0 -34 42 4 16 17 21.2 16 64 65 -34 55 28 -34 28 41 -34 58 7 -34 26 2 0.47 - 37 0 0 -34 25 43 16 17 22.7 17 63 64 -34 39 8 -34 12 20 -34 41 48 -34 9 41 0.47 - 36 0 0 -34 9 11 16 17 24.3 17 63 64 -34 22 37 -33 55 47 -34 25 16 -33 53 8 0.47 - 35 0 0 -33 52 28 16 17 26.0 18 62 63 -34 5 55 -33 39 4 -34 8 34 -33 36 25 0.47 - 34 0 0 -33 35 35 16 17 27.8 19 62 62 -33 49 2 -33 22 10 -33 51 41 -33 19 30 0.47 - 33 0 0 -33 18 31 16 17 29.7 20 61 61 -33 31 58 -33 5 5 -33 34 38 -33 2 26 0.47 - 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19 0 0 -29 4 8 16 18 5.5 32 52 50 -29 17 41 -28 50 37 -29 20 22 -28 47 56 0.48 - 18 0 0 -28 45 5 16 18 8.7 33 51 49 -28 58 39 -28 31 34 -29 1 20 -28 28 54 0.48 - 17 0 0 -28 25 58 16 18 12.0 34 51 48 -28 39 31 -28 12 26 -28 42 12 -28 9 46 0.48 - 16 0 0 -28 6 46 16 18 15.5 35 50 47 -28 20 20 -27 53 14 -28 23 1 -27 50 34 0.48 - 15 0 0 -27 47 30 16 18 19.0 36 49 46 -28 1 4 -27 33 58 -28 3 45 -27 31 18 0.48 - 14 0 0 -27 28 11 16 18 22.6 37 48 45 -27 41 44 -27 14 39 -27 44 25 -27 11 58 0.48 - 13 0 0 -27 8 48 16 18 26.2 38 48 44 -27 22 22 -26 55 16 -27 25 3 -26 52 36 0.48 - 12 0 0 -26 49 22 16 18 30.0 39 47 43 -27 2 56 -26 35 50 -27 5 37 -26 33 10 0.48 - 11 0 0 -26 29 55 16 18 33.8 40 46 42 -26 43 28 -26 16 23 -26 46 9 -26 13 42 0.48 - 10 0 0 -26 10 25 16 18 37.8 40 45 41 -26 23 58 -25 56 53 -26 26 40 -25 54 13 0.48 - 9 0 0 -25 50 54 16 18 41.8 41 45 40 -26 4 27 -25 37 22 -26 7 8 -25 34 42 0.49 - 8 0 0 -25 31 22 16 18 45.9 42 44 40 -25 44 55 -25 17 51 -25 47 36 -25 15 10 0.49 - 7 0 0 -25 11 50 16 18 50.0 43 43 39 -25 25 23 -24 58 18 -25 28 4 -24 55 38 0.49 - 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9 40 39 -10 8 52 - 9 38 7 0.50 91 0 0 - 9 59 46 16 26 30.7 18 285 -50 -10 12 37 - 9 46 56 -10 15 10 - 9 44 24 0.51 92 0 0 -10 6 23 16 26 32.5 17 285 -50 -10 19 15 - 9 53 33 -10 21 48 - 9 51 1 0.51 93 0 0 -10 13 21 16 26 34.3 16 285 -51 -10 26 13 -10 0 30 -10 28 46 - 9 57 58 0.51 94 0 0 -10 20 38 16 26 36.0 15 285 -51 -10 33 31 -10 7 47 -10 36 4 -10 5 15 0.51 95 0 0 -10 28 15 16 26 37.5 14 284 -52 -10 41 9 -10 15 24 -10 43 42 -10 12 51 0.51 96 0 0 -10 36 12 16 26 39.0 13 284 -52 -10 49 6 -10 23 20 -10 51 39 -10 20 47 0.51 97 0 0 -10 44 28 16 26 40.3 12 284 -52 -10 57 22 -10 31 35 -10 59 56 -10 29 3 0.51 98 0 0 -10 53 4 16 26 41.6 11 284 -53 -11 5 59 -10 40 10 -11 8 32 -10 37 38 0.51 99 0 0 -11 1 58 16 26 42.7 10 284 -53 -11 14 54 -10 49 4 -11 17 27 -10 46 31 0.51 100 0 0 -11 11 12 16 26 43.7 9 283 -53 -11 24 8 -10 58 17 -11 26 41 -10 55 44 0.51 101 0 0 -11 20 44 16 26 44.6 8 283 -53 -11 33 40 -11 7 49 -11 36 14 -11 5 16 0.52 102 0 0 -11 30 34 16 26 45.4 7 283 -54 -11 43 32 -11 17 39 -11 46 6 -11 15 6 0.52 103 0 0 -11 40 44 16 26 46.1 6 283 -54 -11 53 41 -11 27 47 -11 56 15 -11 25 14 0.52 104 0 0 -11 51 11 16 26 46.7 5 283 -54 -12 4 9 -11 38 14 -12 6 43 -11 35 40 0.53 105 0 0 -12 1 56 16 26 47.2 4 282 -54 -12 14 55 -11 48 58 -12 17 29 -11 46 24 0.54 106 0 0 -12 12 58 16 26 47.6 3 282 -54 -12 25 58 -12 0 0 -12 28 33 -11 57 26 0.55 107 0 0 -12 24 19 16 26 47.8 2 282 -54 -12 37 19 -12 11 20 -12 39 54 -12 8 46 0.58 108 0 0 -12 35 56 16 26 48.0 1 282 -54 -12 48 57 -12 22 56 -12 51 32 -12 20 22 0.68 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: HIP 3345 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 42 37.9706 DE: +11 06 40.581 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 42 37.9703 DE: +11 06 40.580 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 8.8 * B mag [mag]: 9.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (678) Fredegundis asteroid class: approx. diameter [km]: 42 approx. diameter ["]: 0.034 distance from Earth [AU]: 1.71880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 date of fit: 2023 Apr 27 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): 0.016", 0.002", 66.206° remarks: * orbital elements for (678)Fredegundis : Mean anomaly = 0.7892299913 deg Arg. of pericenter = 121.1514545844 deg Long. of node = 281.0690299143 deg Inclination = 6.0953430483 deg Eccentricity = 0.2206083340 Semimajor axis = 2.5728777559 AU Perihelion dist = 2.0052794806 AU Mag: H = 9.32, G = 0.15 Epoch of elements : MJD 60312.68191909 TDT (2024 Jan 03.6819) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182023Apr27,2.14,2024,1,3,16.366056,0.103976,-0.432394,10.796188,2.584310,0.005058,0.002137,0.000000,0.000000 22.6833,11.2430,-64.40,-22.82,False HIP 3345,0.71054742,11.1112728,8.97,8.83,8.75,0.1,0,,0.73125307,11.2429956,4.48,4.11,0,0,0 678,Fredegundis,13.29,42.183,1.7188,0,0,3.755,13.23,,2.4,0 0,0.6264,2024,1,3,121.1515,281.0690,6.0953,0.22061,2.57288,2.00528,9.32,5.0,0.15 1.099,0.0160,0.0017,66,0.0033,Known errors,2.17,0,-1,-1 20240103_P_3345,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 11, 23:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org