IOTA/IOTA-ES occultation update for (146) Lucina / UCAC4 325-113008 event on 2023 Jun 29, 20:42 UT Visible from India, Africa Summary ------- On 2023 Jun 29 UT, the 137.2 km diameter asteroid (146) Lucina will occult a 12.2 mag star in the constellation Ophiuchus for observers along a path across India, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.63 mag to 11.92 mag (the magnitude of the asteroid) for at most 12.830 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 Jun 29, 20:33 - 2023 Jun 29, 20:52 * geocentric midpoint of event [JD]: 2460125.36304175 * magnitude of target star: 12.19 * magnitude drop [mag]: 0.63 * estimated maximum duration [s]: 12.830 * Moon: 83 % sunlit, 34° distance * Sun: 166° distance * rough path description: India, Africa The occultation path -------------------- * approximate projected width [km]: 146 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.028", 0.006", 107°) * approx speed of asteroid's shadow [km/s]: 10.6906 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 325-113008 by 146 Lucina on 2023 Jun 29 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 - 58 0 0 .. .. .... .. .. .. .. .. .. .. .. .. - 0 45 58 .. .. .. - 0 58 56 .... - 57 0 0 - 0 30 14 20 52 8.5 1 115 13 0 13 42 - 1 13 55 0 26 47 - 1 26 51 .... - 56 0 0 - 0 57 48 20 52 8.1 2 115 12 - 0 14 2 - 1 41 21 - 0 0 59 - 1 54 13 -0.21 - 55 0 0 - 1 24 49 20 52 7.6 3 115 11 - 0 41 12 - 2 8 13 - 0 28 13 - 2 21 3 -0.27 - 54 0 0 - 1 51 18 20 52 6.8 4 115 10 - 1 7 50 - 2 34 32 - 0 54 53 - 2 47 20 -0.30 - 53 0 0 - 2 17 12 20 52 5.8 5 115 9 - 1 33 53 - 3 0 18 - 1 21 0 - 3 13 3 -0.31 - 52 0 0 - 2 42 33 20 52 4.5 6 115 8 - 1 59 24 - 3 25 30 - 1 46 32 - 3 38 13 -0.32 - 51 0 0 - 3 7 21 20 52 3.1 8 115 7 - 2 24 20 - 3 50 9 - 2 11 31 - 4 2 49 -0.33 - 50 0 0 - 3 31 34 20 52 1.4 9 115 6 - 2 48 42 - 4 14 14 - 2 35 56 - 4 26 51 -0.34 - 49 0 0 - 3 55 13 20 51 59.6 10 115 5 - 3 12 30 - 4 37 45 - 2 59 46 - 4 50 19 -0.34 - 48 0 0 - 4 18 19 20 51 57.5 11 115 4 - 3 35 43 - 5 0 41 - 3 23 2 - 5 13 14 -0.34 - 47 0 0 - 4 40 49 20 51 55.2 12 115 3 - 3 58 22 - 5 23 4 - 3 45 44 - 5 35 34 -0.35 - 46 0 0 - 5 2 46 20 51 52.8 13 115 2 - 4 20 27 - 5 44 53 - 4 7 51 - 5 57 20 -0.35 - 45 0 0 - 5 24 8 20 51 50.1 14 115 1 - 4 41 57 - 6 6 7 - 4 29 23 - 6 18 32 -0.35 - 44 0 0 - 5 44 55 20 51 47.2 15 115 0 - 5 2 52 - 6 26 47 - 4 50 21 - 6 39 10 -0.35 - 43 0 0 - 6 5 8 20 51 44.2 16 114 -2 - 5 23 13 - 6 46 52 - 5 10 43 - 6 59 13 -0.35 - 42 0 0 - 6 24 47 20 51 40.9 17 114 -3 - 5 42 59 - 7 6 24 - 5 30 32 - 7 18 42 -0.35 - 41 0 0 - 6 43 51 20 51 37.5 18 114 -4 - 6 2 10 - 7 25 21 - 5 49 45 - 7 37 37 -0.36 - 40 0 0 - 7 2 21 20 51 33.9 19 114 -5 - 6 20 47 - 7 43 43 - 6 8 24 - 7 55 58 -0.36 - 39 0 0 - 7 20 16 20 51 30.2 20 114 -6 - 6 38 49 - 8 1 32 - 6 26 28 - 8 13 44 -0.36 - 38 0 0 - 7 37 37 20 51 26.2 21 114 -7 - 6 56 16 - 8 18 46 - 6 43 58 - 8 30 57 -0.36 - 37 0 0 - 7 54 23 20 51 22.1 22 114 -8 - 7 13 9 - 8 35 26 - 7 0 53 - 8 47 35 -0.36 - 36 0 0 - 8 10 36 20 51 17.8 23 114 -9 - 7 29 28 - 8 51 32 - 7 17 13 - 9 3 39 -0.36 - 35 0 0 - 8 26 13 20 51 13.4 24 114 -10 - 7 45 12 - 9 7 4 - 7 32 59 - 9 19 9 -0.36 - 34 0 0 - 8 41 17 20 51 8.8 25 114 -11 - 8 0 21 - 9 22 2 - 7 48 10 - 9 34 5 -0.36 - 33 0 0 - 8 55 47 20 51 4.1 26 114 -12 - 8 14 57 - 9 36 26 - 8 2 47 - 9 48 28 -0.36 - 32 0 0 - 9 9 42 20 50 59.2 27 114 -13 - 8 28 58 - 9 50 16 - 8 16 50 -10 2 16 -0.36 - 31 0 0 - 9 23 4 20 50 54.1 28 114 -14 - 8 42 24 -10 3 32 - 8 30 18 -10 15 31 -0.36 - 30 0 0 - 9 35 51 20 50 48.9 29 114 -15 - 8 55 17 -10 16 15 - 8 43 13 -10 28 12 -0.36 - 29 0 0 - 9 48 5 20 50 43.6 30 113 -16 - 9 7 36 -10 28 24 - 8 55 33 -10 40 20 -0.36 - 28 0 0 - 9 59 46 20 50 38.1 31 113 -16 - 9 19 21 -10 40 0 - 9 7 19 -10 51 54 -0.36 - 27 0 0 -10 10 52 20 50 32.4 32 113 -17 - 9 30 32 -10 51 2 - 9 18 32 -11 2 55 -0.36 - 26 0 0 -10 21 25 20 50 26.7 33 113 -18 - 9 41 9 -11 1 31 - 9 29 10 -11 13 23 -0.36 - 25 0 0 -10 31 25 20 50 20.8 34 113 -19 - 9 51 13 -11 11 26 - 9 39 15 -11 23 17 -0.36 - 24 0 0 -10 40 51 20 50 14.8 35 113 -20 -10 0 43 -11 20 49 - 9 48 46 -11 32 38 -0.36 - 23 0 0 -10 49 44 20 50 8.6 36 113 -21 -10 9 40 -11 29 38 - 9 57 44 -11 41 27 -0.36 - 22 0 0 -10 58 4 20 50 2.3 36 113 -22 -10 18 3 -11 37 55 -10 6 8 -11 49 42 -0.36 - 21 0 0 -11 5 51 20 49 55.9 37 113 -23 -10 25 53 -11 45 38 -10 13 59 -11 57 25 -0.36 - 20 0 0 -11 13 4 20 49 49.4 38 113 -24 -10 33 9 -11 52 49 -10 21 17 -12 4 35 -0.36 - 19 0 0 -11 19 45 20 49 42.7 39 113 -25 -10 39 53 -11 59 27 -10 28 1 -12 11 12 -0.36 - 18 0 0 -11 25 53 20 49 35.9 40 113 -26 -10 46 3 -12 5 32 -10 34 12 -12 17 16 -0.36 - 17 0 0 -11 31 28 20 49 29.1 41 113 -27 -10 51 41 -12 11 5 -10 39 50 -12 22 49 -0.36 - 16 0 0 -11 36 30 20 49 22.1 42 114 -28 -10 56 45 -12 16 5 -10 44 56 -12 27 48 -0.36 - 15 0 0 -11 41 0 20 49 14.9 43 114 -29 -11 1 17 -12 20 33 -10 49 28 -12 32 15 -0.36 - 14 0 0 -11 44 57 20 49 7.7 44 114 -30 -11 5 16 -12 24 29 -10 53 27 -12 36 10 -0.36 - 13 0 0 -11 48 22 20 49 0.4 45 114 -31 -11 8 42 -12 27 52 -10 56 54 -12 39 33 -0.36 - 12 0 0 -11 51 14 20 48 52.9 46 114 -31 -11 11 36 -12 30 43 -10 59 48 -12 42 24 -0.36 - 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Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 325-113008 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 29 54.7562 DE: -25 06 46.853 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 29 54.7562 DE: -25 06 46.853 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (146) Lucina asteroid class: approx. diameter [km]: 137 approx. diameter ["]: 0.120 distance from Earth [AU]: 1.57810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#117 date of fit: 2023 Apr 24 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): 0.028", 0.006", 107.219° remarks: * orbital elements for (146)Lucina : Mean anomaly = 34.9480536325 deg Arg. of pericenter = 145.4089462908 deg Long. of node = 83.9296283703 deg Inclination = 13.0991982648 deg Eccentricity = 0.0661314766 Semimajor axis = 2.7181571781 AU Perihelion dist = 2.5384014301 AU Mag: H = 8.41, G = 0.11 Epoch of elements : MJD 60124.86291667 TDT (2023 Jun 29.8629) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1172023Apr24,12.83,2023,6,29,20.713002,-0.114064,0.317191,-5.677842,-2.042525,0.001382,0.000103,0.000001,0.000000 34.4775,-25.1319,-129.80,23.20,False UCAC4 325-113008,17.49854340,-25.1130148,0.00,12.19,0.00,0.0,0,,17.52287919,-25.1319338,0.63,0.00,0,0,0 146,Lucina,11.92,137.2,1.5781,0,0,-2.329,-11.38,,7.6,0 0,34.7583,2023,6,29,145.4089,83.9296,13.0992,0.06613,2.71816,2.53840,8.42,5.0,0.15 1.148,0.0283,0.0063,107,0.0178,Known errors,-1.00,-1,-1,-1 20230629_113008,60063.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org