IOTA/IOTA-ES occultation update for (838) Seraphina / TYC 5168-01726-1 event on 2024 Aug 02, 11:24 UT Visible from Summary ------- On 2024 Aug 02 UT, the 54.7801779873744 km diameter asteroid (838) Seraphina will occult a 10.7 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.27 mag to 13.86 mag (the magnitude of the asteroid) for at most 5.400 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: 2024 Aug 02, 11:16 - 2024 Aug 02, 11:32 * geocentric midpoint of event [JD]: 2460524.97521516 * magnitude of target star: 10.65 * magnitude drop [mag]: 3.27 * estimated maximum duration [s]: 5.400 * Moon: 4 % sunlit, 155° distance * Sun: 163° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 75 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.002", 71°) * approx speed of asteroid's shadow [km/s]: 10.1714 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5168-01726-1 by 838 Seraphina on 2024 Aug 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 81 0 0 -51 16 10 11 31 55.8 0 97 -3 -50 55 47 -51 36 41 -50 51 34 -51 40 57 .... 82 0 0 -51 21 7 11 31 55.7 1 96 -4 -51 0 44 -51 41 37 -50 56 32 -51 45 53 0.68 83 0 0 -51 25 57 11 31 55.5 2 96 -4 -51 5 34 -51 46 26 -51 1 21 -51 50 42 0.78 84 0 0 -51 30 37 11 31 55.2 2 95 -5 -51 10 15 -51 51 6 -51 6 3 -51 55 22 0.82 85 0 0 -51 35 10 11 31 54.8 3 94 -6 -51 14 48 -51 55 39 -51 10 36 -51 59 54 0.85 86 0 0 -51 39 34 11 31 54.2 3 93 -6 -51 19 13 -52 0 3 -51 15 1 -52 4 18 0.86 87 0 0 -51 43 50 11 31 53.6 4 93 -7 -51 23 29 -52 4 18 -51 19 17 -52 8 34 0.87 88 0 0 -51 47 58 11 31 52.9 5 92 -7 -51 27 38 -52 8 26 -51 23 25 -52 12 41 0.88 89 0 0 -51 51 58 11 31 52.1 5 91 -8 -51 31 37 -52 12 25 -51 27 25 -52 16 40 0.88 90 0 0 -51 55 49 11 31 51.2 6 90 -9 -51 35 29 -52 16 15 -51 31 17 -52 20 30 0.89 91 0 0 -51 59 31 11 31 50.1 7 89 -9 -51 39 12 -52 19 58 -51 35 0 -52 24 13 0.89 92 0 0 -52 3 6 11 31 49.0 7 89 -10 -51 42 47 -52 23 32 -51 38 35 -52 27 47 0.90 93 0 0 -52 6 32 11 31 47.8 8 88 -10 -51 46 13 -52 26 57 -51 42 1 -52 31 12 0.90 94 0 0 -52 9 49 11 31 46.5 8 87 -11 -51 49 31 -52 30 14 -51 45 19 -52 34 29 0.90 95 0 0 -52 12 58 11 31 45.1 9 86 -12 -51 52 40 -52 33 23 -51 48 28 -52 37 38 0.90 96 0 0 -52 15 59 11 31 43.6 10 85 -12 -51 55 41 -52 36 23 -51 51 29 -52 40 38 0.91 97 0 0 -52 18 51 11 31 42.1 10 85 -13 -51 58 33 -52 39 15 -51 54 22 -52 43 30 0.91 98 0 0 -52 21 35 11 31 40.4 11 84 -13 -52 1 17 -52 41 59 -51 57 6 -52 46 14 0.91 99 0 0 -52 24 10 11 31 38.6 11 83 -14 -52 3 53 -52 44 34 -51 59 42 -52 48 49 0.91 100 0 0 -52 26 37 11 31 36.8 12 82 -15 -52 6 20 -52 47 1 -52 2 9 -52 51 15 0.91 101 0 0 -52 28 55 11 31 34.8 13 81 -15 -52 8 39 -52 49 19 -52 4 27 -52 53 33 0.91 102 0 0 -52 31 5 11 31 32.8 13 81 -16 -52 10 49 -52 51 29 -52 6 37 -52 55 43 0.91 103 0 0 -52 33 7 11 31 30.7 14 80 -16 -52 12 50 -52 53 30 -52 8 39 -52 57 44 0.91 104 0 0 -52 35 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-35 18 10 -34 33 7 -35 22 26 1.25 - 87 0 0 -34 52 25 11 16 40.6 1 265 -17 -34 32 3 -35 12 53 -34 27 50 -35 17 9 1.77 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 5168-01726-1 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 02 40.8608 DE: -04 53 09.335 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 02 40.8608 DE: -04 53 09.335 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (838) Seraphina asteroid class: approx. diameter [km]: 55 approx. diameter ["]: 0.046 distance from Earth [AU]: 1.65210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#96 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): 0.022", 0.002", 71.226° remarks: * orbital elements for (838)Seraphina : Mean anomaly = 318.9051652388 deg Arg. of pericenter = 117.7104907416 deg Long. of node = 240.0170516522 deg Inclination = 10.4229045064 deg Eccentricity = 0.1308832685 Semimajor axis = 2.8989540731 AU Perihelion dist = 2.5195294888 AU Mag: H = 10.16, G = 0.15 Epoch of elements : MJD 60524.47521596 TDT (2024 Aug 02.4752) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#962023Apr24,5.40,2024,8,2,11.405164,0.097527,-0.674342,-5.681900,-0.821767,0.001098,-0.001240,0.000001,0.000000 178.3737,-4.8166,10.49,17.56,False TYC 5168-01726-1,20.04468357,-4.8859264,11.42,10.65,10.23,0.1,0,,20.06669107,-4.8165502,3.26,3.23,0,0,0 838,Seraphina,13.86,54.900,1.6521,0,0,-2.023,-4.38,,2.8,0 0,318.8103,2024,8,2,117.7105,240.0171,10.4229,0.13088,2.89895,2.51953,10.16,5.0,0.15 1.104,0.0223,0.0025,71,0.0047,Known errors,1.20,0,-1,-1 20240802_1726-1,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org