IOTA/IOTA-ES occultation update for (468) Lina / TYC 1879-00782-1 event on 2023 Mar 15, 23:53 UT Visible from South America Summary ------- On 2023 Mar 15 UT, the 61.7 km diameter asteroid (468) Lina will occult a 11.8 mag star in the constellation Gemini 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 3.96 mag to 15.68 mag (the magnitude of the asteroid) for at most 7.010 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 Mar 15, 23:42 - 2023 Mar 16, 00:04 * geocentric midpoint of event [JD]: 2460019.49523625 * magnitude of target star: 11.75 * magnitude drop [mag]: 3.96 * estimated maximum duration [s]: 7.010 * Moon: 39 % sunlit, 176° distance * Sun: 102° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 70 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.001", 93°) * approx speed of asteroid's shadow [km/s]: 8.8032 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1879-00782-1 by 468 Lina on 2023 Mar 15 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 -151 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -21 19 45 .. .. .. -21 18 26 .... -150 0 0 -21 13 42 23 42 30.1 1 64 60 -21 34 34 -20 52 54 -21 35 53 -20 51 35 .... -149 0 0 -20 46 55 23 42 30.5 2 64 60 -21 7 46 -20 26 9 -21 9 5 -20 24 51 0.29 -148 0 0 -20 20 18 23 42 31.1 3 63 59 -20 41 6 -19 59 33 -20 42 26 -19 58 15 0.37 -147 0 0 -19 53 49 23 42 32.0 4 63 59 -20 14 36 -19 33 6 -20 15 55 -19 31 48 0.41 -146 0 0 -19 27 29 23 42 33.2 5 63 58 -19 48 15 -19 6 49 -19 49 33 -19 5 30 0.43 -145 0 0 -19 1 21 23 42 34.6 6 62 57 -19 22 4 -18 40 42 -19 23 22 -18 39 24 0.44 -144 0 0 -18 35 23 23 42 36.4 7 62 57 -18 56 4 -18 14 46 -18 57 23 -18 13 28 0.45 -143 0 0 -18 9 37 23 42 38.3 8 62 56 -18 30 16 -17 49 2 -18 31 35 -17 47 44 0.46 -142 0 0 -17 44 4 23 42 40.6 9 61 55 -18 4 41 -17 23 31 -18 6 0 -17 22 14 0.47 -141 0 0 -17 18 45 23 42 43.2 10 61 55 -17 39 19 -16 58 14 -17 40 38 -16 56 56 0.47 -140 0 0 -16 53 39 23 42 46.0 11 61 54 -17 14 12 -16 33 10 -17 15 30 -16 31 53 0.48 -139 0 0 -16 28 48 23 42 49.1 12 60 53 -16 49 19 -16 8 22 -16 50 37 -16 7 4 0.48 -138 0 0 -16 4 13 23 42 52.5 13 60 52 -16 24 41 -15 43 49 -16 25 59 -15 42 31 0.48 -137 0 0 -15 39 54 23 42 56.1 14 60 52 -16 0 20 -15 19 32 -16 1 37 -15 18 15 0.49 -136 0 0 -15 15 51 23 43 0.0 16 59 51 -15 36 15 -14 55 32 -15 37 32 -14 54 15 0.49 -135 0 0 -14 52 6 23 43 4.2 17 59 50 -15 12 28 -14 31 49 -15 13 45 -14 30 32 0.49 -134 0 0 -14 28 40 23 43 8.7 18 59 49 -14 48 59 -14 8 25 -14 50 16 -14 7 8 0.49 -133 0 0 -14 5 32 23 43 13.4 19 59 48 -14 25 48 -13 45 19 -14 27 5 -13 44 2 0.50 -132 0 0 -13 42 43 23 43 18.4 20 58 47 -14 2 57 -13 22 32 -14 4 14 -13 21 16 0.50 -131 0 0 -13 20 14 23 43 23.7 21 58 46 -13 40 26 -13 0 6 -13 41 43 -12 58 50 0.50 -130 0 0 -12 58 6 23 43 29.2 22 58 45 -13 18 16 -12 38 0 -13 19 32 -12 36 44 0.50 -129 0 0 -12 36 19 23 43 35.0 23 57 45 -12 56 26 -12 16 16 -12 57 43 -12 15 0 0.50 -128 0 0 -12 14 53 23 43 41.0 24 57 44 -12 34 58 -11 54 52 -12 36 15 -11 53 37 0.50 -127 0 0 -11 53 50 23 43 47.3 25 57 43 -12 13 53 -11 33 52 -12 15 9 -11 32 36 0.50 -126 0 0 -11 33 10 23 43 53.8 26 56 42 -11 53 10 -11 13 13 -11 54 26 -11 11 58 0.51 -125 0 0 -11 12 52 23 44 0.6 27 56 41 -11 32 50 -10 52 58 -11 34 6 -10 51 43 0.51 -124 0 0 -10 52 59 23 44 7.7 28 56 40 -11 12 54 -10 33 7 -11 14 10 -10 31 52 0.51 -123 0 0 -10 33 30 23 44 14.9 29 55 39 -10 53 23 -10 13 40 -10 54 38 -10 12 25 0.51 -122 0 0 -10 14 25 23 44 22.4 30 55 38 -10 34 16 - 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12 0 0 -24 45 5 0 3 30.1 + 11 303 -60 -25 6 13 -24 24 0 -25 7 33 -24 22 41 0.52 - 11 0 0 -25 13 2 0 3 32.9 + 10 302 -60 -25 34 11 -24 51 57 -25 35 32 -24 50 37 0.52 - 10 0 0 -25 41 0 0 3 35.3 + 9 302 -60 -26 2 10 -25 19 54 -26 3 31 -25 18 34 0.52 - 9 0 0 -26 8 57 0 3 37.6 + 8 302 -60 -26 30 9 -25 47 50 -26 31 29 -25 46 30 0.52 - 8 0 0 -26 36 54 0 3 39.5 + 7 301 -60 -26 58 6 -26 15 46 -26 59 27 -26 14 26 0.52 - 7 0 0 -27 4 49 0 3 41.2 + 6 301 -60 -27 26 2 -26 43 40 -27 27 22 -26 42 20 0.53 - 6 0 0 -27 32 41 0 3 42.6 + 5 300 -60 -27 53 55 -27 11 32 -27 55 15 -27 10 12 0.53 - 5 0 0 -28 0 30 0 3 43.8 + 4 300 -60 -28 21 44 -27 39 20 -28 23 5 -27 38 0 0.53 - 4 0 0 -28 28 15 0 3 44.7 + 3 299 -59 -28 49 29 -28 7 5 -28 50 50 -28 5 45 0.54 - 3 0 0 -28 55 55 0 3 45.3 + 2 299 -59 -29 17 10 -28 34 44 -29 18 30 -28 33 24 0.55 - 2 0 0 -29 23 29 0 3 45.7 + 1 298 -59 -29 44 44 -29 2 19 -29 46 5 -29 0 58 0.57 - 1 0 0 -29 50 57 0 3 45.9 + 0 298 -58 -30 12 12 -29 29 46 -30 13 33 -29 28 26 0.81 Uncertainty in time = +/- 4 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 1879-00782-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 30 59.6559 DE: +23 44 13.042 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 30 59.6557 DE: +23 44 13.042 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (468) Lina asteroid class: approx. diameter [km]: 62 approx. diameter ["]: 0.028 distance from Earth [AU]: 2.98660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Feb 07 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): 0.015", 0.001", 93.004° remarks: * orbital elements for (468)Lina : Mean anomaly = 99.3909245257 deg Arg. of pericenter = 332.2662515417 deg Long. of node = 21.4993898142 deg Inclination = 0.4363080050 deg Eccentricity = 0.1959736246 Semimajor axis = 3.1330806594 AU Perihelion dist = 2.5190794864 AU Mag: H = 9.77, G = 0.15 Epoch of elements : MJD 60018.99520833 TDT (2023 Mar 15.9952) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Feb07,7.01,2023,3,15,23.885670,-0.038026,-0.471207,4.952486,-0.401847,0.005785,-0.000333,0.000000,0.000000 -73.5064,23.7214,-176.08,-1.93,False TYC 1879-00782-1,6.51657109,23.7369561,0.00,11.75,0.00,0.0,0,,6.54004801,23.7214244,3.96,0.00,0,0,0 468,Lina,15.68,61.7,2.9866,0,0,1.063,-1.18,,3.4,0 0,99.2141,2023,3,15,332.2663,21.4994,0.4363,0.19597,3.13308,2.51908,9.79,5.0,0.15 1.032,0.0147,0.0008,93,0.0009,Known errors,-1.00,-1,-1,-1 20230315_0782-1,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org