IOTA/IOTA-ES occultation update for (146) Lucina / UCAC4 362-089236 event on 2023 Feb 26, 06:34 UT Visible from South America Summary ------- On 2023 Feb 26 UT, the 137.2 km diameter asteroid (146) Lucina will occult a 12.5 mag star in the constellation Ophiuchus 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 1.45 mag to 13.58 mag (the magnitude of the asteroid) for at most 5.490 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: 2023 Feb 26, 06:30 - 2023 Feb 26, 06:38 * geocentric midpoint of event [JD]: 2460001.77393279 * magnitude of target star: 12.46 * magnitude drop [mag]: 1.45 * estimated maximum duration [s]: 5.490 * Moon: 40 % sunlit, 153° distance * Sun: 76° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 137 * 1 sigma uncertainty interval [path widths]: +/- 0.06 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.003", 109°) * approx speed of asteroid's shadow [km/s]: 25.0003 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 362-089236 by 146 Lucina on 2023 Feb 26 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 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 4 11 15 .. .. .. .... - 80 0 0 4 36 1 6 30 12.9 1 108 -75 3 56 51 5 15 9 3 51 57 5 20 3 .... - 79 0 0 4 16 35 6 30 13.0 2 108 -74 3 37 23 4 55 45 3 32 28 5 0 39 0.10 - 78 0 0 3 56 59 6 30 13.2 3 108 -73 3 17 46 4 36 11 3 12 51 4 41 5 0.08 - 77 0 0 3 37 14 6 30 13.5 4 108 -72 2 57 59 4 16 28 2 53 4 4 21 22 0.07 - 76 0 0 3 17 21 6 30 13.8 5 108 -71 2 38 4 3 56 36 2 33 9 4 1 31 0.07 - 75 0 0 2 57 19 6 30 14.3 6 108 -70 2 18 1 3 36 35 2 13 5 3 41 30 0.07 - 74 0 0 2 37 9 6 30 14.8 7 108 -69 1 57 49 3 16 27 1 52 54 3 21 22 0.07 - 73 0 0 2 16 52 6 30 15.5 8 108 -68 1 37 31 2 56 11 1 32 35 3 1 6 0.06 - 72 0 0 1 56 27 6 30 16.2 9 108 -67 1 17 5 2 35 48 1 12 9 2 40 43 0.06 - 71 0 0 1 35 56 6 30 17.0 10 108 -66 0 56 32 2 15 18 0 51 36 2 20 14 0.06 - 70 0 0 1 15 19 6 30 17.9 11 108 -65 0 35 54 1 54 42 0 30 58 1 59 38 0.06 - 69 0 0 0 54 36 6 30 18.9 12 108 -64 0 15 10 1 34 0 0 10 14 1 38 56 0.06 - 68 0 0 0 33 48 6 30 19.9 14 108 -63 - 0 5 39 1 13 13 - 0 10 36 1 18 9 0.06 - 67 0 0 0 12 55 6 30 21.1 15 108 -61 - 0 26 33 0 52 21 - 0 31 30 0 57 17 0.06 - 66 0 0 - 0 8 3 6 30 22.3 16 108 -60 - 0 47 31 0 31 24 - 0 52 28 0 36 21 0.06 - 65 0 0 - 0 29 4 6 30 23.6 17 108 -59 - 1 8 33 0 10 24 - 1 13 30 0 15 20 0.06 - 64 0 0 - 0 50 9 6 30 25.0 18 108 -58 - 1 29 39 - 0 10 40 - 1 34 35 - 0 5 44 0.06 - 63 0 0 - 1 11 16 6 30 26.5 19 108 -57 - 1 50 47 - 0 31 47 - 1 55 44 - 0 26 51 0.06 - 62 0 0 - 1 32 26 6 30 28.1 20 108 -56 - 2 11 57 - 0 52 57 - 2 16 54 - 0 48 0 0.06 - 61 0 0 - 1 53 38 6 30 29.8 21 108 -55 - 2 33 9 - 1 14 8 - 2 38 6 - 1 9 11 0.06 - 60 0 0 - 2 14 51 6 30 31.5 22 108 -54 - 2 54 23 - 1 35 21 - 2 59 20 - 1 30 24 0.06 - 59 0 0 - 2 36 5 6 30 33.3 23 108 -53 - 3 15 37 - 1 56 35 - 3 20 34 - 1 51 38 0.06 - 58 0 0 - 2 57 20 6 30 35.2 24 108 -52 - 3 36 52 - 2 17 49 - 3 41 49 - 2 12 53 0.06 - 57 0 0 - 3 18 35 6 30 37.2 25 108 -51 - 3 58 7 - 2 39 4 - 4 3 4 - 2 34 7 0.06 - 56 0 0 - 3 39 49 6 30 39.3 26 108 -50 - 4 19 21 - 3 0 18 - 4 24 18 - 2 55 21 0.06 - 55 0 0 - 4 1 2 6 30 41.4 27 108 -49 - 4 40 33 - 3 21 31 - 4 45 30 - 3 16 35 0.06 - 54 0 0 - 4 22 13 6 30 43.6 28 108 -48 - 5 1 45 - 3 42 43 - 5 6 42 - 3 37 46 0.06 - 53 0 0 - 4 43 22 6 30 45.9 29 108 -47 - 5 22 54 - 4 3 53 - 5 27 51 - 3 58 56 0.06 - 52 0 0 - 5 4 29 6 30 48.3 31 108 -45 - 5 44 0 - 4 25 0 - 5 48 57 - 4 20 4 0.06 - 51 0 0 - 5 25 33 6 30 50.8 32 107 -44 - 6 5 3 - 4 46 4 - 6 10 0 - 4 41 8 0.06 - 50 0 0 - 5 46 33 6 30 53.3 33 107 -43 - 6 26 3 - 5 7 5 - 6 31 0 - 5 2 9 0.06 - 49 0 0 - 6 7 30 6 30 55.9 34 107 -42 - 6 46 58 - 5 28 2 - 6 51 55 - 5 23 6 0.05 - 48 0 0 - 6 28 22 6 30 58.6 35 107 -41 - 7 7 49 - 5 48 55 - 7 12 46 - 5 43 59 0.05 - 47 0 0 - 6 49 8 6 31 1.3 36 107 -40 - 7 28 35 - 6 9 43 - 7 33 32 - 6 4 47 0.05 - 46 0 0 - 7 9 50 6 31 4.1 37 107 -39 - 7 49 16 - 6 30 25 - 7 54 12 - 6 25 29 0.05 - 45 0 0 - 7 30 25 6 31 7.0 38 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24 22 -15 7 24 -16 29 11 -15 2 35 0.06 80 0 0 -15 30 41 6 38 28.4 19 256 82 -16 9 13 -14 52 11 -16 14 3 -14 47 21 0.06 81 0 0 -15 15 14 6 38 29.8 18 256 83 -15 53 49 -14 36 41 -15 58 39 -14 31 52 0.06 82 0 0 -14 59 33 6 38 31.2 17 256 84 -15 38 9 -14 20 57 -15 42 59 -14 16 8 0.06 83 0 0 -14 43 36 6 38 32.5 16 255 84 -15 22 15 -14 4 58 -15 27 6 -14 0 8 0.06 84 0 0 -14 27 25 6 38 33.7 15 255 84 -15 6 6 -13 48 45 -15 10 57 -13 43 55 0.06 85 0 0 -14 11 0 6 38 34.8 14 255 84 -14 49 43 -13 32 18 -14 54 34 -13 27 27 0.06 86 0 0 -13 54 20 6 38 35.9 13 255 84 -14 33 6 -13 15 36 -14 37 58 -13 10 45 0.06 87 0 0 -13 37 27 6 38 36.9 12 254 84 -14 16 15 -12 58 41 -14 21 7 -12 53 50 0.06 88 0 0 -13 20 21 6 38 37.8 11 254 84 -13 59 11 -12 41 32 -14 4 3 -12 36 41 0.06 89 0 0 -13 3 2 6 38 38.6 10 254 83 -13 41 54 -12 24 11 -13 46 46 -12 19 19 0.07 90 0 0 -12 45 29 6 38 39.3 9 254 83 -13 24 24 -12 6 36 -13 29 16 -12 1 44 0.07 91 0 0 -12 27 45 6 38 40.0 8 254 82 -13 6 41 -11 48 49 -13 11 34 -11 43 57 0.07 92 0 0 -12 9 48 6 38 40.6 7 253 81 -12 48 46 -11 30 51 -12 53 39 -11 25 58 0.07 93 0 0 -11 51 39 6 38 41.1 6 253 80 -12 30 40 -11 12 40 -12 35 33 -11 7 47 0.08 94 0 0 -11 33 19 6 38 41.6 5 253 79 -12 12 22 -10 54 18 -12 17 15 -10 49 25 0.08 95 0 0 -11 14 48 6 38 41.9 4 253 78 -11 53 52 -10 35 45 -11 58 46 -10 30 52 0.09 96 0 0 -10 56 6 6 38 42.2 3 253 78 -11 35 12 -10 17 1 -11 40 6 -10 12 8 0.10 97 0 0 -10 37 14 6 38 42.4 2 252 77 -11 16 22 - 9 58 7 -11 21 16 - 9 53 13 0.13 98 0 0 -10 18 11 6 38 42.5 1 252 76 -10 57 21 - 9 39 3 -11 2 15 - 9 34 9 0.23 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 30.1 Data for the target star ------------------------ * name: UCAC4 362-089236 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 22 55.6192 DE: -17 37 17.929 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 22 55.6193 DE: -17 37 17.929 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (146) Lucina asteroid class: approx. diameter [km]: 137 approx. diameter ["]: 0.073 distance from Earth [AU]: 2.59100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#116 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): 0.018", 0.003", 109.187° remarks: * orbital elements for (146)Lucina : Mean anomaly = 7.7239446504 deg Arg. of pericenter = 145.4549990261 deg Long. of node = 83.9301818002 deg Inclination = 13.0985621678 deg Eccentricity = 0.0662145801 Semimajor axis = 2.7184317192 AU Perihelion dist = 2.5384319043 AU Mag: H = 8.42, G = 0.11 Epoch of elements : MJD 60001.27395833 TDT (2023 Feb 26.2740) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1162022Nov25,5.49,2023,2,26,6.574387,-0.006000,-0.047017,13.980924,-1.910528,-0.005605,0.000481,0.000000,0.000000 6.5934,-17.6444,84.62,-8.80,False UCAC4 362-089236,17.38211642,-17.6216469,0.00,12.46,0.00,0.0,0,,17.40429854,-17.6444262,1.45,0.00,0,0,1 146,Lucina,13.58,137.2,2.5910,0,0,3.320,-6.48,,7.6,0 0,7.6637,2023,2,26,145.4550,83.9302,13.0986,0.06621,2.71843,2.53843,8.42,5.0,0.15 1.063,0.0177,0.0030,109,0.0046,Known errors,-1.00,-1,-1,-1 20230226_089236,59943.05 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 30, 01:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org