IOTA/IOTA-ES occultation update for (5055) Opekushin / TYC 5815-00965-1 event on 2024 Sep 13, 07:27 UT Visible from Summary ------- On 2024 Sep 13 UT, the 15.7409812903172 km diameter asteroid (5055) Opekushin will occult a 10.5 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.83 mag to 16.35 mag (the magnitude of the asteroid) for at most 1.700 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: 92 * date and approx. time of event: 2024 Sep 13, 07:18 - 2024 Sep 13, 07:37 * geocentric midpoint of event [JD]: 2460566.81082088 * magnitude of target star: 10.53 * magnitude drop [mag]: 5.83 * estimated maximum duration [s]: 1.700 * Moon: 71 % sunlit, 53° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.49 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.040, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.042", 0.004", 71°) * approx speed of asteroid's shadow [km/s]: 9.3294 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5815-00965-1 by 5055 Opekushin on 2024 Sep 13 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 126 0 0 -60 9 15 7 36 48.5 0 111 11 -60 3 38 -60 14 53 -59 58 8 -60 20 24 .... 127 0 0 -60 20 37 7 36 48.4 1 110 10 -60 15 1 -60 26 13 -60 9 31 -60 31 44 0.63 128 0 0 -60 31 37 7 36 48.3 1 109 10 -60 26 2 -60 37 12 -60 20 34 -60 42 42 0.66 129 0 0 -60 42 16 7 36 48.1 2 108 9 -60 36 42 -60 47 50 -60 31 15 -60 53 19 0.67 130 0 0 -60 52 34 7 36 47.8 2 107 9 -60 47 1 -60 58 8 -60 41 35 -61 3 35 0.68 131 0 0 -61 2 32 7 36 47.4 3 106 8 -60 57 0 -61 8 5 -60 51 35 -61 13 31 0.68 132 0 0 -61 12 10 7 36 47.0 3 106 8 -61 6 39 -61 17 41 -61 1 14 -61 23 7 0.69 133 0 0 -61 21 27 7 36 46.5 4 105 7 -61 15 57 -61 26 58 -61 10 34 -61 32 23 0.69 134 0 0 -61 30 25 7 36 45.9 4 104 7 -61 24 56 -61 35 55 -61 19 33 -61 41 19 0.69 135 0 0 -61 39 3 7 36 45.3 5 103 6 -61 33 35 -61 44 32 -61 28 13 -61 49 55 0.70 136 0 0 -61 47 22 7 36 44.7 5 102 6 -61 41 55 -61 52 50 -61 36 34 -61 58 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30.0 23 265 -32 -16 28 19 -16 39 39 -16 22 46 -16 45 13 0.72 - 52 0 0 -16 10 41 7 19 24.2 22 265 -31 -16 5 2 -16 16 20 -15 59 30 -16 21 53 0.72 - 51 0 0 -15 47 50 7 19 18.7 21 265 -30 -15 42 13 -15 53 29 -15 36 41 -15 59 1 0.72 - 50 0 0 -15 25 28 7 19 13.4 20 264 -29 -15 19 51 -15 31 5 -15 14 21 -15 36 36 0.72 - 49 0 0 -15 3 34 7 19 8.3 19 264 -28 -14 57 58 -15 9 10 -14 52 28 -15 14 40 0.72 - 48 0 0 -14 42 8 7 19 3.5 18 264 -27 -14 36 33 -14 47 44 -14 31 5 -14 53 13 0.72 - 47 0 0 -14 21 12 7 18 58.9 17 263 -26 -14 15 38 -14 26 46 -14 10 11 -14 32 15 0.73 - 46 0 0 -14 0 45 7 18 54.5 17 263 -25 -13 55 12 -14 6 19 -13 49 46 -14 11 47 0.73 - 45 0 0 -13 40 49 7 18 50.4 16 263 -24 -13 35 17 -13 46 21 -13 29 51 -13 51 48 0.73 - 44 0 0 -13 21 23 7 18 46.6 15 262 -23 -13 15 51 -13 26 55 -13 10 27 -13 32 20 0.73 - 43 0 0 -13 2 27 7 18 43.0 14 262 -23 -12 56 57 -13 7 58 -12 51 33 -13 13 24 0.73 - 42 0 0 -12 44 3 7 18 39.6 13 262 -22 -12 38 33 -12 49 33 -12 33 10 -12 54 58 0.74 - 41 0 0 -12 26 10 7 18 36.5 12 262 -21 -12 20 41 -12 31 40 -12 15 19 -12 37 3 0.74 - 40 0 0 -12 8 49 7 18 33.7 11 261 -20 -12 3 21 -12 14 18 -11 57 59 -12 19 41 0.74 - 39 0 0 -11 52 0 7 18 31.1 10 261 -19 -11 46 33 -11 57 28 -11 41 12 -12 2 50 0.75 - 38 0 0 -11 35 43 7 18 28.8 9 261 -18 -11 30 17 -11 41 11 -11 24 57 -11 46 32 0.76 - 37 0 0 -11 19 59 7 18 26.7 8 261 -17 -11 14 33 -11 25 26 -11 9 14 -11 30 46 0.76 - 36 0 0 -11 4 48 7 18 24.9 7 261 -16 -10 59 23 -11 10 14 -10 54 4 -11 15 34 0.77 - 35 0 0 -10 50 10 7 18 23.3 6 260 -15 -10 44 45 -10 55 35 -10 39 27 -11 0 55 0.78 - 34 0 0 -10 36 6 7 18 22.0 5 260 -14 -10 30 41 -10 41 30 -10 25 24 -10 46 49 0.80 - 33 0 0 -10 22 34 7 18 21.0 4 260 -13 -10 17 11 -10 27 58 -10 11 54 -10 33 16 0.83 - 32 0 0 -10 9 37 7 18 20.2 3 260 -12 -10 4 14 -10 15 1 - 9 58 58 -10 20 18 0.88 - 31 0 0 - 9 57 14 7 18 19.7 2 260 -11 - 9 51 52 -10 2 37 - 9 46 36 -10 7 54 0.99 - 30 0 0 - 9 45 26 7 18 19.4 1 259 -10 - 9 40 4 - 9 50 48 - 9 34 48 - 9 56 4 1.54 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5815-00965-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 43 00.2021 DE: -10 38 57.558 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 43 00.2021 DE: -10 38 57.558 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.5 * B mag [mag]: 11.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5055) Opekushin asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.013 distance from Earth [AU]: 1.66860 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2023 Apr 25 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): 0.042", 0.004", 70.971° remarks: * orbital elements for (5055)Opekushin : Mean anomaly = 25.6584481858 deg Arg. of pericenter = 174.7731784798 deg Long. of node = 132.6495742705 deg Inclination = 2.9015767334 deg Eccentricity = 0.1631749002 Semimajor axis = 3.0950183618 AU Perihelion dist = 2.5899890496 AU Mag: H = 12.72, G = 0.15 Epoch of elements : MJD 60566.31082120 TDT (2024 Sep 13.3108) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr25,1.70,2024,9,13,7.459701,0.254287,-0.524139,-4.737874,-2.297975,0.001064,0.000676,0.000001,0.000000 -123.5988,-10.5184,67.06,3.56,False TYC 5815-00965-1,22.71672281,-10.6493217,10.98,10.53,10.29,0.1,0,,22.73872705,-10.5183978,5.83,5.62,0,0,0 5055,Opekushin,16.35,15.862,1.6686,0,0,-1.692,-12.11,,1.6,0 0,25.6022,2024,9,13,174.7732,132.6496,2.9016,0.16317,3.09502,2.58999,12.71,5.0,0.15 1.491,0.0420,0.0040,71,0.0064,Known errors,1.12,0,-1,-1 20240913_0965-1,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org