IOTA/IOTA-ES occultation update for (5123) Cynus / TYC 1232-00592-1 event on 2023 Feb 07, 12:42 UT Visible from Japan, China Summary ------- On 2023 Feb 07 UT, the 35.4 km diameter asteroid (5123) Cynus will occult a 11.5 mag star in the constellation Aries for observers along a path across Japan, China. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.14 mag to 17.68 mag (the magnitude of the asteroid) for at most 2.920 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: 44 * date and approx. time of event: 2023 Feb 07, 12:33 - 2023 Feb 07, 12:50 * geocentric midpoint of event [JD]: 2459983.02922495 * magnitude of target star: 11.54 * magnitude drop [mag]: 6.14 * estimated maximum duration [s]: 2.920 * Moon: 97 % sunlit, 107° distance * Sun: 93° distance * rough path description: Japan, China The occultation path -------------------- * approximate projected width [km]: 36 * 1 sigma uncertainty interval [path widths]: +/- 1.48 * 1 sigma uncertainty interval [seconds]: +/- 6.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.015", 65°) * approx speed of asteroid's shadow [km/s]: 12.1292 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1232-00592-1 by 5123 Cynus on 2023 Feb 7 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 -19 42 49 12 33 26.0 1 73 84 -19 53 0 -19 32 37 -20 23 7 -19 2 25 .... 1 0 0 -19 25 5 12 33 26.2 2 73 83 -19 35 18 -19 14 52 -20 5 31 -18 44 35 -0.18 2 0 0 -19 6 47 12 33 26.5 3 72 82 -19 17 2 -18 56 32 -19 47 19 -18 26 9 -0.18 3 0 0 -18 47 53 12 33 27.0 4 72 82 -18 58 9 -18 37 36 -19 28 32 -18 7 8 -0.18 4 0 0 -18 28 23 12 33 27.7 5 72 81 -18 38 42 -18 18 5 -19 9 10 -17 47 31 -0.18 5 0 0 -18 8 18 12 33 28.5 6 71 80 -18 18 39 -17 57 58 -18 49 13 -17 27 18 -0.18 6 0 0 -17 47 37 12 33 29.5 7 71 79 -17 58 0 -17 37 15 -18 28 40 -17 6 29 -0.18 7 0 0 -17 26 20 12 33 30.7 8 71 78 -17 36 45 -17 15 56 -18 7 31 -16 45 4 -0.18 8 0 0 -17 4 28 12 33 32.1 9 71 77 -17 14 54 -16 54 1 -17 45 46 -16 23 3 -0.18 9 0 0 -16 41 59 12 33 33.6 10 70 77 -16 52 27 -16 31 30 -17 23 25 -16 0 26 -0.18 10 0 0 -16 18 53 12 33 35.3 11 70 76 -16 29 24 -16 8 22 -17 0 29 -15 37 12 -0.18 11 0 0 -15 55 12 12 33 37.2 12 70 75 -16 5 45 -15 44 39 -16 36 56 -15 13 22 -0.18 12 0 0 -15 30 55 12 33 39.3 13 69 74 -15 41 30 -15 20 19 -16 12 47 -14 48 56 -0.18 13 0 0 -15 6 1 12 33 41.6 14 69 73 -15 16 38 -14 55 23 -15 48 2 -14 23 53 -0.18 14 0 0 -14 40 31 12 33 44.0 15 69 72 -14 51 10 -14 29 51 -15 22 41 -13 58 14 -0.18 15 0 0 -14 14 25 12 33 46.7 16 69 71 -14 25 7 -14 3 43 -14 56 44 -13 31 59 -0.18 16 0 0 -13 47 43 12 33 49.5 17 68 70 -13 58 27 -13 36 58 -14 30 11 -13 5 8 -0.18 17 0 0 -13 20 24 12 33 52.6 18 68 69 -13 31 11 -13 9 38 -14 3 2 -12 37 40 -0.18 18 0 0 -12 52 30 12 33 55.8 19 68 68 -13 3 19 -12 41 41 -13 35 17 -12 9 37 -0.18 19 0 0 -12 24 1 12 33 59.3 20 68 67 -12 34 52 -12 13 9 -13 6 57 -11 40 57 -0.18 20 0 0 -11 54 55 12 34 3.0 21 68 65 -12 5 49 -11 44 1 -12 38 1 -11 11 42 -0.18 21 0 0 -11 25 14 12 34 6.8 23 67 64 -11 36 10 -11 14 18 -12 8 30 -10 41 52 -0.18 22 0 0 -10 54 58 12 34 10.9 24 67 63 -11 5 57 -10 44 0 -11 38 24 -10 11 26 -0.18 23 0 0 -10 24 8 12 34 15.2 25 67 62 -10 35 9 -10 13 6 -11 7 42 - 9 40 26 -0.18 24 0 0 - 9 52 43 12 34 19.7 26 67 61 -10 3 46 - 9 41 39 -10 36 27 - 9 8 51 -0.18 25 0 0 - 9 20 43 12 34 24.4 27 67 60 - 9 31 49 - 9 9 37 -10 4 37 - 8 36 42 -0.18 26 0 0 - 8 48 10 12 34 29.4 28 67 59 - 8 59 19 - 8 37 2 - 9 32 14 - 8 4 0 -0.18 27 0 0 - 8 15 4 12 34 34.5 29 67 58 - 8 26 15 - 8 3 53 - 8 59 17 - 7 30 44 -0.18 28 0 0 - 7 41 26 12 34 39.9 31 67 57 - 7 52 38 - 7 30 12 - 8 25 48 - 6 56 56 -0.18 29 0 0 - 7 7 15 12 34 45.5 32 67 56 - 7 18 30 - 6 55 59 - 7 51 46 - 6 22 35 -0.18 30 0 0 - 6 32 32 12 34 51.3 33 67 54 - 6 43 50 - 6 21 14 - 7 17 13 - 5 47 44 -0.18 31 0 0 - 5 57 19 12 34 57.3 34 67 53 - 6 8 39 - 5 45 58 - 6 42 9 - 5 12 21 -0.18 32 0 0 - 5 21 35 12 35 3.5 35 67 52 - 5 32 57 - 5 10 12 - 6 6 34 - 4 36 28 -0.18 33 0 0 - 4 45 22 12 35 10.0 36 67 51 - 4 56 47 - 4 33 57 - 5 30 30 - 4 0 6 -0.18 34 0 0 - 4 8 41 12 35 16.6 38 67 50 - 4 20 7 - 3 57 13 - 4 53 58 - 3 23 16 -0.18 35 0 0 - 3 31 32 12 35 23.5 39 67 49 - 3 43 0 - 3 20 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0 39 14 58 12 50 41.2 4 287 -65 39 4 46 39 25 11 38 34 36 39 55 26 -0.22 178 0 0 38 59 47 12 50 41.7 3 288 -65 38 49 33 39 10 1 38 19 18 39 40 21 -0.23 179 0 0 38 44 6 12 50 42.0 2 288 -65 38 33 51 38 54 22 38 3 30 39 24 48 -0.25 180 0 0 38 27 56 12 50 42.3 2 289 -65 38 17 38 38 38 13 37 47 12 39 8 44 -0.30 -179 0 0 38 11 15 12 50 42.5 1 290 -65 38 0 56 38 21 35 37 30 24 38 52 11 -0.45 -178 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 38 35 8 .... Uncertainty in time = +/- 6 secs Prediction of 2022 Dec 13.0 Data for the target star ------------------------ * name: TYC 1232-00592-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 15 51.2666 DE: +15 37 50.233 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 15 51.2664 DE: +15 37 50.232 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5123) Cynus asteroid class: approx. diameter [km]: 35 approx. diameter ["]: 0.010 distance from Earth [AU]: 4.69150 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2022 Nov 23 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", 0.015", 65.283° remarks: * orbital elements for (5123)Cynus : Mean anomaly = 319.8206333905 deg Arg. of pericenter = 32.7934715172 deg Long. of node = 78.1782964010 deg Inclination = 8.5296277548 deg Eccentricity = 0.1034697430 Semimajor axis = 5.2241711206 AU Perihelion dist = 4.6836274774 AU Mag: H = 10.15, G = 0.15 Epoch of elements : MJD 59982.52937500 TDT (2023 Feb 07.5294) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492022Nov23,2.92,2023,2,7,12.701399,-0.081510,0.142770,5.926436,3.427272,0.005894,0.001595,0.000000,0.000000 81.3838,15.7155,-7.00,-15.29,False TYC 1232-00592-1,3.26424073,15.6306203,0.00,11.54,0.00,0.0,0,,3.28562775,15.7155373,6.14,0.00,0,0,0 5123,Cynus,17.68,35.4,4.6915,0,0,0.769,6.43,,4.6,0 0,319.7769,2023,2,7,32.7935,78.1783,8.5296,0.10347,5.22417,4.68363,10.18,5.0,0.15 2.480,0.0217,0.0153,65,0.0154,Known errors,-1.00,-1,-1,-1 20230207_0592-1,59926.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 13, 00:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org