IOTA/IOTA-ES occultation update for (173) Ino / UCAC4-367-138013 event on 2022 Oct 07, 21:38 UT Visible from South America Summary ------- On 2022 Oct 07 UT, the 140.6 km diameter asteroid (173) Ino will occult a 12.4 mag star in the constellation Sagittarius 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 1.06 mag to 12.97 mag (the magnitude of the asteroid) for at most 6.940 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: 2022 Oct 07, 21:32 - 2022 Oct 07, 21:43 * geocentric midpoint of event [JD]: 2459860.40152612 * magnitude of target star: 12.42 * magnitude drop [mag]: 1.06 * estimated maximum duration [s]: 6.940 * Moon: 95 % sunlit, 71° distance * Sun: 85° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 143 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.002", 98°) * approx speed of asteroid's shadow [km/s]: 20.2499 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-367-138013 by 173 Ino on 2022 Oct 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 -141 0 0 25 43 29 21 33 2.6 0 109 58 25 2 34 26 24 29 24 59 4 26 28 0 .... -140 0 0 25 24 56 21 33 2.7 1 109 58 24 43 58 26 6 1 24 40 28 26 9 32 -0.04 -139 0 0 25 6 6 21 33 2.9 2 110 58 24 25 4 25 47 14 24 21 34 25 50 45 -0.10 -138 0 0 24 46 57 21 33 3.1 3 110 58 24 5 52 25 28 9 24 2 21 25 31 40 -0.13 -137 0 0 24 27 31 21 33 3.5 4 110 59 23 46 21 25 8 46 23 42 51 25 12 17 -0.14 -136 0 0 24 7 46 21 33 3.9 5 111 59 23 26 34 24 49 5 23 23 3 24 52 37 -0.15 -135 0 0 23 47 44 21 33 4.5 6 111 59 23 6 28 24 29 6 23 2 57 24 32 39 -0.16 -134 0 0 23 27 25 21 33 5.1 7 112 58 22 46 6 24 8 51 22 42 34 24 12 24 -0.16 -133 0 0 23 6 50 21 33 5.8 8 112 58 22 25 27 23 48 18 22 21 55 23 51 51 -0.17 -132 0 0 22 45 57 21 33 6.7 9 112 58 22 4 31 23 27 29 22 0 59 23 31 2 -0.17 -131 0 0 22 24 48 21 33 7.6 10 113 58 21 43 19 23 6 24 21 39 46 23 9 57 -0.17 -130 0 0 22 3 23 21 33 8.6 11 113 58 21 21 51 22 45 2 21 18 18 22 48 36 -0.17 -129 0 0 21 41 43 21 33 9.7 12 114 58 21 0 7 22 23 25 20 56 34 22 26 59 -0.17 -128 0 0 21 19 47 21 33 11.0 13 114 58 20 38 9 22 1 32 20 34 35 22 5 6 -0.18 -127 0 0 20 57 36 21 33 12.3 14 114 57 20 15 55 21 39 24 20 12 21 21 42 59 -0.18 -126 0 0 20 35 11 21 33 13.7 15 115 57 19 53 27 21 17 2 19 49 53 21 20 37 -0.18 -125 0 0 20 12 32 21 33 15.2 16 115 57 19 30 45 20 54 25 19 27 11 20 58 0 -0.18 -124 0 0 19 49 39 21 33 16.9 17 115 56 19 7 49 20 31 35 19 4 15 20 35 10 -0.18 -123 0 0 19 26 32 21 33 18.6 18 116 56 18 44 40 20 8 31 18 41 5 20 12 6 -0.18 -122 0 0 19 3 13 21 33 20.5 19 116 56 18 21 18 19 45 14 18 17 43 19 48 50 -0.18 -121 0 0 18 39 41 21 33 22.4 20 117 55 17 57 44 19 21 44 17 54 9 19 25 20 -0.18 -120 0 0 18 15 57 21 33 24.5 21 117 55 17 33 58 18 58 3 17 30 23 19 1 39 -0.18 -119 0 0 17 52 2 21 33 26.6 22 117 54 17 10 0 18 34 10 17 6 25 18 37 46 -0.18 -118 0 0 17 27 56 21 33 28.9 23 118 54 16 45 52 18 10 6 16 42 17 18 13 42 -0.18 -117 0 0 17 3 39 21 33 31.3 24 118 53 16 21 34 17 45 51 16 17 58 17 49 28 -0.18 -116 0 0 16 39 13 21 33 33.7 25 118 53 15 57 5 17 21 26 15 53 30 17 25 3 -0.18 -115 0 0 16 14 37 21 33 36.3 26 119 52 15 32 28 16 56 52 15 28 52 17 0 29 -0.18 -114 0 0 15 49 52 21 33 39.0 28 119 51 15 7 42 16 32 9 15 4 6 16 35 46 -0.18 -113 0 0 15 24 59 21 33 41.8 29 119 51 14 42 47 16 7 18 14 39 11 16 10 55 -0.19 -112 0 0 14 59 59 21 33 44.7 30 120 50 14 17 46 15 42 18 14 14 9 15 45 56 -0.19 -111 0 0 14 34 51 21 33 47.7 31 120 49 13 52 37 15 17 12 13 49 1 15 20 49 -0.19 -110 0 0 14 9 37 21 33 50.8 32 120 49 13 27 22 14 51 59 13 23 46 14 55 36 -0.19 -109 0 0 13 44 17 21 33 54.0 33 121 48 13 2 1 14 26 40 12 58 25 14 30 17 -0.19 -108 0 0 13 18 52 21 33 57.3 34 121 47 12 36 36 14 1 15 12 32 59 14 4 53 -0.19 -107 0 0 12 53 22 21 34 0.7 35 121 47 12 11 5 13 35 46 12 7 29 13 39 24 -0.19 -106 0 0 12 27 49 21 34 4.2 36 122 46 11 45 31 13 10 13 11 41 55 13 13 51 -0.19 -105 0 0 12 2 12 21 34 7.8 37 122 45 11 19 54 12 44 36 11 16 18 12 48 14 -0.19 -104 0 0 11 36 32 21 34 11.5 38 122 44 10 54 15 12 18 57 10 50 38 12 22 34 -0.19 -103 0 0 11 10 51 21 34 15.3 39 123 43 10 28 33 11 53 15 10 24 57 11 56 53 -0.19 -102 0 0 10 45 8 21 34 19.2 40 123 43 10 2 51 11 27 32 9 59 14 11 31 10 -0.19 -101 0 0 10 19 25 21 34 23.1 41 123 42 9 37 8 11 1 48 9 33 31 11 5 26 -0.19 -100 0 0 9 53 42 21 34 27.2 42 124 41 9 11 25 10 36 5 9 7 49 10 39 42 -0.19 - 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23 0 0 -11 18 32 21 41 14.8 52 257 -33 -11 57 24 -10 39 35 -12 0 43 -10 36 15 -0.20 - 22 0 0 -11 20 33 21 41 19.2 51 257 -34 -11 59 25 -10 41 37 -12 2 44 -10 38 17 -0.20 - 21 0 0 -11 22 9 21 41 23.5 50 257 -35 -12 1 0 -10 43 13 -12 4 19 -10 39 53 -0.20 - 20 0 0 -11 23 20 21 41 27.8 49 258 -36 -12 2 11 -10 44 24 -12 5 30 -10 41 4 -0.20 - 19 0 0 -11 24 5 21 41 32.0 48 258 -37 -12 2 56 -10 45 10 -12 6 15 -10 41 50 -0.20 - 18 0 0 -11 24 26 21 41 36.1 47 258 -38 -12 3 16 -10 45 30 -12 6 35 -10 42 10 -0.20 - 17 0 0 -11 24 21 21 41 40.2 46 258 -39 -12 3 11 -10 45 25 -12 6 30 -10 42 5 -0.20 - 16 0 0 -11 23 50 21 41 44.2 45 258 -40 -12 2 41 -10 44 55 -12 6 0 -10 41 35 -0.20 - 15 0 0 -11 22 55 21 41 48.1 44 258 -41 -12 1 46 -10 43 59 -12 5 5 -10 40 39 -0.20 - 14 0 0 -11 21 35 21 41 52.0 43 258 -42 -12 0 25 -10 42 39 -12 3 44 -10 39 19 -0.20 - 13 0 0 -11 19 49 21 41 55.8 42 258 -43 -11 58 40 -10 40 53 -12 1 59 -10 37 33 -0.20 - 12 0 0 -11 17 38 21 41 59.5 41 258 -44 -11 56 30 -10 38 41 -11 59 49 -10 35 21 -0.20 - 11 0 0 -11 15 3 21 42 3.2 40 258 -45 -11 53 55 -10 36 5 -11 57 14 -10 32 45 -0.20 - 10 0 0 -11 12 2 21 42 6.7 39 257 -45 -11 50 55 -10 33 4 -11 54 15 -10 29 43 -0.20 - 9 0 0 -11 8 36 21 42 10.3 38 257 -46 -11 47 31 -10 29 37 -11 50 50 -10 26 17 -0.20 - 8 0 0 -11 4 46 21 42 13.7 37 257 -47 -11 43 41 -10 25 45 -11 47 0 -10 22 25 -0.20 - 7 0 0 -11 0 31 21 42 17.0 36 257 -48 -11 39 27 -10 21 29 -11 42 46 -10 18 9 -0.20 - 6 0 0 -10 55 50 21 42 20.3 35 257 -49 -11 34 48 -10 16 47 -11 38 7 -10 13 27 -0.20 - 5 0 0 -10 50 45 21 42 23.5 34 257 -50 -11 29 44 -10 11 41 -11 33 4 -10 8 21 -0.20 - 4 0 0 -10 45 16 21 42 26.7 33 257 -51 -11 24 16 -10 6 10 -11 27 36 -10 2 49 -0.20 - 3 0 0 -10 39 21 21 42 29.7 32 257 -52 -11 18 23 -10 0 14 -11 21 43 - 9 56 53 -0.20 - 2 0 0 -10 33 2 21 42 32.7 31 257 -53 -11 12 6 - 9 53 54 -11 15 26 - 9 50 33 -0.20 - 1 0 0 -10 26 19 21 42 35.6 30 257 -54 -11 5 24 - 9 47 8 -11 8 44 - 9 43 47 -0.20 0 0 0 -10 19 11 21 42 38.4 29 257 -55 -10 58 18 - 9 39 59 -11 1 38 - 9 36 37 -0.20 1 0 0 -10 11 39 21 42 41.1 28 256 -56 -10 50 48 - 9 32 25 -10 54 8 - 9 29 3 -0.20 2 0 0 -10 3 42 21 42 43.7 27 256 -57 -10 42 53 - 9 24 26 -10 46 14 - 9 21 4 -0.20 3 0 0 - 9 55 22 21 42 46.3 26 256 -58 -10 34 35 - 9 16 3 -10 37 56 - 9 12 41 -0.20 4 0 0 - 9 46 37 21 42 48.8 25 256 -59 -10 25 52 - 9 7 16 -10 29 13 - 9 3 54 -0.20 5 0 0 - 9 37 28 21 42 51.2 24 256 -60 -10 16 46 - 8 58 5 -10 20 7 - 8 54 43 -0.20 6 0 0 - 9 27 55 21 42 53.4 23 256 -61 -10 7 15 - 8 48 30 -10 10 37 - 8 45 8 -0.20 7 0 0 - 9 17 59 21 42 55.7 22 256 -62 - 9 57 21 - 8 38 31 -10 0 43 - 8 35 8 -0.20 8 0 0 - 9 7 39 21 42 57.8 21 256 -63 - 9 47 4 - 8 28 8 - 9 50 26 - 8 24 45 -0.20 9 0 0 - 8 56 55 21 42 59.8 20 255 -63 - 9 36 23 - 8 17 22 - 9 39 45 - 8 13 59 -0.20 10 0 0 - 8 45 48 21 43 1.7 19 255 -64 - 9 25 18 - 8 6 12 - 9 28 41 - 8 2 49 -0.20 11 0 0 - 8 34 18 21 43 3.6 18 255 -65 - 9 13 51 - 7 54 39 - 9 17 13 - 7 51 15 -0.20 12 0 0 - 8 22 24 21 43 5.3 17 255 -66 - 9 2 0 - 7 42 43 - 9 5 23 - 7 39 19 -0.20 13 0 0 - 8 10 7 21 43 7.0 16 255 -67 - 8 49 46 - 7 30 23 - 8 53 9 - 7 26 59 -0.20 14 0 0 - 7 57 28 21 43 8.6 15 255 -68 - 8 37 10 - 7 17 41 - 8 40 33 - 7 14 16 -0.20 15 0 0 - 7 44 26 21 43 10.0 14 255 -69 - 8 24 11 - 7 4 36 - 8 27 34 - 7 1 11 -0.20 16 0 0 - 7 31 1 21 43 11.4 13 255 -70 - 8 10 49 - 6 51 8 - 8 14 13 - 6 47 43 -0.20 17 0 0 - 7 17 14 21 43 12.7 12 254 -71 - 7 57 5 - 6 37 18 - 8 0 30 - 6 33 53 -0.20 18 0 0 - 7 3 5 21 43 13.8 11 254 -72 - 7 42 59 - 6 23 5 - 7 46 24 - 6 19 40 -0.20 19 0 0 - 6 48 34 21 43 14.9 10 254 -73 - 7 28 32 - 6 8 31 - 7 31 56 - 6 5 5 -0.20 20 0 0 - 6 33 41 21 43 15.9 9 254 -73 - 7 13 42 - 5 53 35 - 7 17 7 - 5 50 9 -0.20 21 0 0 - 6 18 27 21 43 16.8 8 254 -74 - 6 58 31 - 5 38 17 - 7 1 56 - 5 34 51 -0.20 22 0 0 - 6 2 51 21 43 17.5 7 254 -75 - 6 42 59 - 5 22 38 - 6 46 24 - 5 19 12 -0.20 23 0 0 - 5 46 55 21 43 18.2 6 254 -76 - 6 27 5 - 5 6 38 - 6 30 31 - 5 3 11 -0.20 24 0 0 - 5 30 37 21 43 18.8 5 254 -77 - 6 10 51 - 4 50 17 - 6 14 17 - 4 46 50 -0.20 25 0 0 - 5 13 59 21 43 19.2 4 254 -77 - 5 54 17 - 4 33 36 - 5 57 43 - 4 30 8 -0.20 26 0 0 - 4 57 1 21 43 19.6 3 254 -78 - 5 37 22 - 4 16 34 - 5 40 48 - 4 13 6 -0.19 27 0 0 - 4 39 42 21 43 19.9 2 253 -79 - 5 20 6 - 3 59 12 - 5 23 33 - 3 55 44 -0.19 28 0 0 - 4 22 4 21 43 20.0 1 253 -79 - 5 2 32 - 3 41 30 - 5 5 59 - 3 38 2 -0.19 Uncertainty in time = +/- 2 secs Prediction of 2022 Aug 20.1 Data for the target star ------------------------ * name: UCAC4-367-138013 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 38 54.1515 DE: -16 41 50.406 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 38 54.1515 DE: -16 41 50.406 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (173) Ino asteroid class: approx. diameter [km]: 141 approx. diameter ["]: 0.082 distance from Earth [AU]: 2.35850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#112 date of fit: 2022 Aug 01 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): 0.021", 0.002", 98.163° remarks: * orbital elements for (173)Ino : Mean anomaly = 307.5473953774 deg Arg. of pericenter = 228.8402947218 deg Long. of node = 148.1719013146 deg Inclination = 14.1997590611 deg Eccentricity = 0.2097597049 Semimajor axis = 2.7414578575 AU Perihelion dist = 2.1664104663 AU Mag: H = 8.02, G = 0.01 Epoch of elements : MJD 59859.90194445 TDT (2022 Oct 07.9019) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1122022Aug01,6.94,2022,10,7,21.636627,0.054628,0.188802,11.009700,-3.069589,0.005567,0.000448,0.000000,0.000000 -61.0099,-16.6772,-147.62,-5.76,False UCAC4-367-138013,18.64837544,-16.6973350,0.00,12.42,0.00,0.0,0,,18.67003993,-16.6771679,1.06,0.00,0,0,1 173,Ino,12.97,140.6,2.3585,0,0,2.857,-11.44,,9.0,0 0,307.3516,2022,10,7,228.8403,148.1719,14.1998,0.20976,2.74146,2.16641,8.02,5.0,0.15 1.043,0.0213,0.0022,98,0.0035,Known errors,-1.00,-1,-1,-1 20221007_138013,59811.11 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 20, 02:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org