IOTA/IOTA-ES occultation update for (383) Janina / TYC 5571-01035-1 event on 2023 Jan 28, 06:46 UT Visible from South America Summary ------- On 2023 Jan 28 UT, the 42.2 km diameter asteroid (383) Janina will occult a 9.6 mag star in the constellation Libra for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.71 mag to 16.30 mag (the magnitude of the asteroid) for at most 2.830 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: 2023 Jan 28, 06:38 - 2023 Jan 28, 06:53 * geocentric midpoint of event [JD]: 2459972.78207292 * magnitude of target star: 9.59 * magnitude drop [mag]: 6.71 * estimated maximum duration [s]: 2.830 * Moon: 46 % sunlit, 174° distance * Sun: 88° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 42 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 110°) * approx speed of asteroid's shadow [km/s]: 14.9109 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5571-01035-1 by 383 Janina on 2023 Jan 28 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 - 96 0 0 9 11 24 6 39 5.2 1 103 -81 8 59 37 9 23 12 8 56 32 9 26 17 .... - 95 0 0 8 57 50 6 39 5.3 2 103 -81 8 46 2 9 9 38 8 42 56 9 12 43 0.12 - 94 0 0 8 43 58 6 39 5.6 3 103 -80 8 32 9 8 55 46 8 29 3 8 58 52 0.11 - 93 0 0 8 29 49 6 39 6.0 4 103 -80 8 17 59 8 41 38 8 14 53 8 44 44 0.11 - 92 0 0 8 15 23 6 39 6.6 5 103 -79 8 3 33 8 27 13 8 0 27 8 30 19 0.10 - 91 0 0 8 0 41 6 39 7.2 6 103 -78 7 48 50 8 12 31 7 45 43 8 15 38 0.10 - 90 0 0 7 45 42 6 39 8.1 7 104 -78 7 33 50 7 57 33 7 30 43 8 0 40 0.10 - 89 0 0 7 30 27 6 39 9.0 8 104 -77 7 18 34 7 42 19 7 15 27 7 45 25 0.10 - 88 0 0 7 14 55 6 39 10.1 9 104 -76 7 3 2 7 26 49 6 59 55 7 29 55 0.10 - 87 0 0 6 59 9 6 39 11.4 10 104 -75 6 47 14 7 11 2 6 44 7 7 14 9 0.10 - 86 0 0 6 43 6 6 39 12.7 11 104 -74 6 31 11 6 55 1 6 28 4 6 58 8 0.10 - 85 0 0 6 26 48 6 39 14.3 12 104 -74 6 14 53 6 38 44 6 11 45 6 41 51 0.10 - 84 0 0 6 10 15 6 39 15.9 13 104 -73 5 58 19 6 22 11 5 55 11 6 25 19 0.10 - 83 0 0 5 53 28 6 39 17.7 14 104 -72 5 41 30 6 5 24 5 38 23 6 8 32 0.10 - 82 0 0 5 36 25 6 39 19.6 15 104 -71 5 24 28 5 48 23 5 21 19 5 51 31 0.10 - 81 0 0 5 19 9 6 39 21.7 16 105 -70 5 7 10 5 31 7 5 4 2 5 34 15 0.10 - 80 0 0 5 1 38 6 39 24.0 17 105 -69 4 49 39 5 13 37 4 46 31 5 16 46 0.10 - 79 0 0 4 43 54 6 39 26.3 18 105 -68 4 31 54 4 55 54 4 28 46 4 59 2 0.10 - 78 0 0 4 25 57 6 39 28.8 19 105 -67 4 13 56 4 37 57 4 10 47 4 41 6 0.10 - 77 0 0 4 7 46 6 39 31.5 20 105 -66 3 55 45 4 19 48 3 52 36 4 22 56 0.10 - 76 0 0 3 49 23 6 39 34.3 21 105 -65 3 37 21 4 1 25 3 34 12 4 4 34 0.10 - 75 0 0 3 30 48 6 39 37.2 22 105 -64 3 18 45 3 42 50 3 15 36 3 45 59 0.10 - 74 0 0 3 12 0 6 39 40.3 23 105 -63 2 59 57 3 24 4 2 56 47 3 27 13 0.10 - 73 0 0 2 53 1 6 39 43.5 24 105 -62 2 40 57 3 5 5 2 37 48 3 8 15 0.10 - 72 0 0 2 33 51 6 39 46.8 25 105 -61 2 21 46 2 45 55 2 18 36 2 49 5 0.10 - 71 0 0 2 14 30 6 39 50.3 27 105 -60 2 2 25 2 26 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22 32 - 1 58 10 - 2 25 43 - 1 54 58 0.10 - 57 0 0 - 2 31 28 6 40 53.1 42 104 -45 - 2 43 40 - 2 19 17 - 2 46 51 - 2 16 5 0.10 - 56 0 0 - 2 52 40 6 40 58.5 43 104 -44 - 3 4 52 - 2 40 28 - 3 8 3 - 2 37 17 0.10 - 55 0 0 - 3 13 55 6 41 4.1 44 104 -43 - 3 26 7 - 3 1 43 - 3 29 19 - 2 58 31 0.10 - 54 0 0 - 3 35 13 6 41 9.7 45 104 -42 - 3 47 25 - 3 23 1 - 3 50 37 - 3 19 49 0.10 - 53 0 0 - 3 56 34 6 41 15.5 46 104 -41 - 4 8 46 - 3 44 21 - 4 11 58 - 3 41 10 0.10 - 52 0 0 - 4 17 56 6 41 21.4 47 104 -40 - 4 30 9 - 4 5 44 - 4 33 20 - 4 2 32 0.10 - 51 0 0 - 4 39 20 6 41 27.3 48 103 -39 - 4 51 33 - 4 27 8 - 4 54 45 - 4 23 56 0.10 - 50 0 0 - 5 0 45 6 41 33.4 49 103 -38 - 5 12 58 - 4 48 33 - 5 16 10 - 4 45 21 0.10 - 49 0 0 - 5 22 10 6 41 39.6 50 103 -37 - 5 34 23 - 5 9 58 - 5 37 35 - 5 6 46 0.10 - 48 0 0 - 5 43 36 6 41 45.8 51 103 -36 - 5 55 48 - 5 31 23 - 5 59 0 - 5 28 11 0.10 - 47 0 0 - 6 5 0 6 41 52.2 52 102 -35 - 6 17 13 - 5 52 48 - 6 20 25 - 5 49 36 0.10 - 46 0 0 - 6 26 24 6 41 58.6 53 102 -34 - 6 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28 33 -20 5 3 -20 31 38 -20 1 58 0.13 79 0 0 -20 4 31 6 53 16.4 3 258 88 -20 16 17 -19 52 45 -20 19 22 -19 49 41 0.14 80 0 0 -19 51 58 6 53 16.7 2 258 88 -20 3 44 -19 40 11 -20 6 50 -19 37 7 0.15 81 0 0 -19 39 8 6 53 17.0 1 257 88 -19 50 55 -19 27 21 -19 54 1 -19 24 16 0.20 82 0 0 -19 26 2 6 53 17.1 0 257 87 -19 37 50 -19 14 15 -19 40 56 -19 11 9 0.60 Uncertainty in time = +/- 3 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 5571-01035-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 32 37.5808 DE: -12 17 50.139 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 32 37.5808 DE: -12 17 50.140 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (383) Janina asteroid class: approx. diameter [km]: 42 approx. diameter ["]: 0.017 distance from Earth [AU]: 3.44200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 date of fit: 2022 Nov 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): 0.016", 0.002", 109.858° remarks: * orbital elements for (383)Janina : Mean anomaly = 134.2582806767 deg Arg. of pericenter = 324.6083342030 deg Long. of node = 92.7676061244 deg Inclination = 2.6592197760 deg Eccentricity = 0.1683580382 Semimajor axis = 3.1399653284 AU Perihelion dist = 2.6113269256 AU Mag: H = 9.98, G = 0.15 Epoch of elements : MJD 59972.28208333 TDT (2023 Jan 28.2821) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592022Nov25,2.83,2023,1,28,6.769750,-0.022663,-0.086520,8.144357,-2.121580,-0.005774,0.001903,0.000000,0.000000 -10.3592,-12.3986,81.66,-18.25,False TYC 5571-01035-1,14.54377241,-12.2972608,0.00,9.59,0.00,0.0,0,,14.56443225,-12.3986368,6.71,0.00,0,0,0 383,Janina,16.30,42.2,3.4420,0,0,1.421,-5.42,,2.8,0 0,134.2083,2023,1,28,324.6083,92.7676,2.6592,0.16836,3.13997,2.61133,9.99,5.0,0.15 1.131,0.0157,0.0017,110,0.0022,Known errors,-1.00,-1,-1,-1 20230128_1035-1,59914.10 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org