IOTA/IOTA-ES occultation update for (3310) Patsy / UCAC4 314-238007 event on 2024 Oct 22, 13:26 UT Visible from Summary ------- On 2024 Oct 22 UT, the 22.767 km diameter asteroid (3310) Patsy will occult a 12.0 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.59 mag to 16.55 mag (the magnitude of the asteroid) for at most 1.070 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: 95 * date and approx. time of event: 2024 Oct 22, 13:21 - 2024 Oct 22, 13:31 * geocentric midpoint of event [JD]: 2460606.05995404 * magnitude of target star: 11.98 * magnitude drop [mag]: 4.59 * estimated maximum duration [s]: 1.070 * Moon: 69 % sunlit, 166° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.004", 91°) * approx speed of asteroid's shadow [km/s]: 21.2842 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 314-238007 by 3310 Patsy on 2024 Oct 22 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 - 43 0 0 -27 2 55 13 21 44.4 0 121 66 -27 10 46 -26 55 6 -27 17 39 .. .. .. .... - 42 0 0 -27 34 55 13 21 44.4 1 120 67 -27 42 45 -27 27 5 -27 49 39 -27 20 13 0.40 - 41 0 0 -28 6 44 13 21 44.6 2 120 67 -28 14 34 -27 58 54 -28 21 28 -27 52 2 0.42 - 40 0 0 -28 38 22 13 21 44.9 3 119 67 -28 46 12 -28 30 33 -28 53 6 -28 23 41 0.42 - 39 0 0 -29 9 49 13 21 45.3 4 119 68 -29 17 38 -29 1 59 -29 24 31 -28 55 7 0.43 - 38 0 0 -29 41 2 13 21 45.7 5 118 68 -29 48 51 -29 33 13 -29 55 44 -29 26 21 0.43 - 37 0 0 -30 12 1 13 21 46.3 6 118 68 -30 19 51 -30 4 13 -30 26 43 -29 57 22 0.43 - 36 0 0 -30 42 47 13 21 47.0 7 117 68 -30 50 35 -30 34 58 -30 57 28 -30 28 7 0.43 - 35 0 0 -31 13 16 13 21 47.8 8 117 68 -31 21 5 -31 5 29 -31 27 57 -30 58 38 0.43 - 34 0 0 -31 43 30 13 21 48.6 9 116 68 -31 51 18 -31 35 43 -31 58 10 -31 28 53 0.43 - 33 0 0 -32 13 27 13 21 49.6 10 116 68 -32 21 15 -32 5 41 -32 28 6 -31 58 51 0.43 - 32 0 0 -32 43 7 13 21 50.6 11 115 68 -32 50 54 -32 35 21 -32 57 44 -32 28 32 0.43 - 31 0 0 -33 12 29 13 21 51.8 12 115 67 -33 20 15 -33 4 43 -33 27 5 -32 57 54 0.43 - 30 0 0 -33 41 31 13 21 53.0 13 114 67 -33 49 17 -33 33 46 -33 56 6 -33 26 58 0.43 - 29 0 0 -34 10 15 13 21 54.3 14 113 67 -34 17 59 -34 2 30 -34 24 48 -33 55 43 0.43 - 28 0 0 -34 38 38 13 21 55.6 15 113 67 -34 46 22 -34 30 54 -34 53 10 -34 24 8 0.43 - 27 0 0 -35 6 41 13 21 57.1 16 112 66 -35 14 24 -34 58 58 -35 21 11 -34 52 12 0.43 - 26 0 0 -35 34 22 13 21 58.6 17 112 66 -35 42 5 -35 26 40 -35 48 51 -35 19 55 0.43 - 25 0 0 -36 1 43 13 22 0.2 18 111 65 -36 9 24 -35 54 2 -36 16 10 -35 47 17 0.43 - 24 0 0 -36 28 41 13 22 1.9 19 110 65 -36 36 21 -36 21 1 -36 43 6 -36 14 17 0.43 - 23 0 0 -36 55 17 13 22 3.6 20 110 64 -37 2 56 -36 47 38 -37 9 40 -36 40 55 0.43 - 22 0 0 -37 21 30 13 22 5.4 21 109 64 -37 29 8 -37 13 52 -37 35 52 -37 7 10 0.43 - 21 0 0 -37 47 20 13 22 7.2 21 108 63 -37 54 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-16 39 43 0.50 152 0 0 -16 21 50 13 30 54.5 5 243 -62 -16 29 33 -16 14 7 -16 36 20 -16 7 22 0.51 153 0 0 -15 49 37 13 30 55.0 4 243 -63 -15 57 19 -15 41 56 -16 4 5 -15 35 11 0.53 154 0 0 -15 17 36 13 30 55.4 3 243 -63 -15 25 17 -15 9 55 -15 32 2 -15 3 11 0.57 155 0 0 -14 45 47 13 30 55.7 2 242 -64 -14 53 27 -14 38 7 -15 0 11 -14 31 24 0.64 156 0 0 -14 14 11 13 30 55.9 1 242 -64 -14 21 50 -14 6 32 -14 28 34 -13 59 50 0.86 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 314-238007 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 34 04.4011 DE: -27 14 09.180 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 34 04.4010 DE: -27 14 09.180 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3310) Patsy asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.93440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.016", 0.004", 91.482° remarks: * orbital elements for (3310)Patsy : Mean anomaly = 70.2353729778 deg Arg. of pericenter = 132.7504523117 deg Long. of node = 101.3484634257 deg Inclination = 11.0972598110 deg Eccentricity = 0.0592556046 Semimajor axis = 3.0087480264 AU Perihelion dist = 2.8304628430 AU Mag: H = 10.89, G = 0.15 Epoch of elements : MJD 60605.55995362 TDT (2024 Oct 22.5600) ------ occelmnt file for Occult BEGIN ----------------------------------- <Occultations> <Event> <Elements>JPL#572023Apr24,1.07,2024,10,22,13.438897,0.051049,-0.386768,11.909532,1.576204,0.005720,0.000855,0.000000,0.000000</Elements> <Earth>60.8467,-27.1835,-25.49,-11.34,False</Earth> <Star>UCAC4 314-238007,19.56788923,-27.2358833,12.54,11.98,11.68,0.0,0,,19.59333295,-27.1834983,4.59,4.44,0,0,0</Star> <Object>3310,Patsy,16.55,22.767,2.9344,0,0,2.676,4.73,,2.4,0</Object> <Orbit>0,70.1296,2024,10,22,132.7505,101.3485,11.0973,0.05926,3.00875,2.83046,10.88,5.0,0.15</Orbit> <Errors>1.439,0.0163,0.0040,91,0.0047,Known errors,0.86,0,-1,-1</Errors> <ID>20241022_238007,60140.65</ID> </Event> </Occultations> ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org