IOTA/IOTA-ES occultation update for (3310) Patsy / UCAC4 321-214813 event on 2024 Jul 28, 23:30 UT Visible from Summary ------- On 2024 Jul 28 UT, the 22.6777978738536 km diameter asteroid (3310) Patsy will occult a 9.7 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 5.40 mag to 15.13 mag (the magnitude of the asteroid) for at most 2.130 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: 74 * date and approx. time of event: 2024 Jul 28, 23:20 - 2024 Jul 28, 23:39 * geocentric midpoint of event [JD]: 2460520.47923929 * magnitude of target star: 9.74 * magnitude drop [mag]: 5.40 * estimated maximum duration [s]: 2.130 * Moon: 40 % sunlit, 121° distance * Sun: 161° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.76 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.006", 92°) * approx speed of asteroid's shadow [km/s]: 10.7175 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 321-214813 by 3310 Patsy on 2024 Jul 28 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 -101 0 0 2 22 5 23 39 2.8 0 116 18 2 29 47 2 14 24 2 41 33 2 2 40 .... -100 0 0 1 53 12 23 39 2.6 1 116 17 2 0 52 1 45 33 2 12 36 1 33 53 -0.16 - 99 0 0 1 25 0 23 39 2.2 2 116 15 1 32 37 1 17 22 1 44 18 1 5 45 -0.32 - 98 0 0 0 57 27 23 39 1.6 3 116 14 1 5 3 0 49 51 1 16 40 0 38 17 -0.38 - 97 0 0 0 30 34 23 39 0.7 5 116 13 0 38 8 0 23 1 0 49 42 0 11 30 -0.41 - 96 0 0 0 4 21 23 38 59.6 6 116 12 0 11 53 - 0 3 10 0 23 24 - 0 14 38 -0.43 - 95 0 0 - 0 21 11 23 38 58.3 7 116 11 - 0 13 41 - 0 28 41 - 0 2 13 - 0 40 6 -0.44 - 94 0 0 - 0 46 3 23 38 56.7 8 116 10 - 0 38 35 - 0 53 31 - 0 27 10 - 1 4 53 -0.45 - 93 0 0 - 1 10 15 23 38 54.9 9 116 9 - 1 2 49 - 1 17 41 - 0 51 26 - 1 29 1 -0.45 - 92 0 0 - 1 33 47 23 38 52.9 10 116 8 - 1 26 22 - 1 41 11 - 1 15 2 - 1 52 28 -0.46 - 91 0 0 - 1 56 38 23 38 50.7 11 116 7 - 1 49 15 - 2 4 0 - 1 37 58 - 2 15 15 -0.46 - 90 0 0 - 2 18 49 23 38 48.2 12 116 6 - 2 11 28 - 2 26 10 - 2 0 13 - 2 37 22 -0.47 - 89 0 0 - 2 40 20 23 38 45.6 13 116 5 - 2 33 0 - 2 47 39 - 2 21 48 - 2 58 49 -0.47 - 88 0 0 - 3 1 11 23 38 42.8 14 116 4 - 2 53 53 - 3 8 28 - 2 42 43 - 3 19 35 -0.47 - 87 0 0 - 3 21 22 23 38 39.8 15 116 3 - 3 14 5 - 3 28 38 - 3 2 58 - 3 39 42 -0.47 - 86 0 0 - 3 40 53 23 38 36.5 16 116 2 - 3 33 38 - 3 48 7 - 3 22 33 - 3 59 10 -0.47 - 85 0 0 - 3 59 44 23 38 33.1 17 116 1 - 3 52 30 - 4 6 57 - 3 41 27 - 4 17 57 -0.47 - 84 0 0 - 4 17 55 23 38 29.5 18 116 0 - 4 10 43 - 4 25 7 - 3 59 42 - 4 36 5 -0.47 - 83 0 0 - 4 35 27 23 38 25.7 19 116 -1 - 4 28 16 - 4 42 37 - 4 17 18 - 4 53 33 -0.48 - 82 0 0 - 4 52 19 23 38 21.8 20 116 -2 - 4 45 10 - 4 59 28 - 4 34 13 - 5 10 22 -0.48 - 81 0 0 - 5 8 32 23 38 17.6 21 116 -3 - 5 1 24 - 5 15 40 - 4 50 29 - 5 26 32 -0.48 - 80 0 0 - 5 24 6 23 38 13.3 22 116 -4 - 5 16 59 - 5 31 13 - 5 6 6 - 5 42 3 -0.48 - 79 0 0 - 5 39 1 23 38 8.8 23 116 -5 - 5 31 55 - 5 46 6 - 5 21 4 - 5 56 55 -0.48 - 78 0 0 - 5 53 17 23 38 4.2 24 116 -6 - 5 46 12 - 6 0 21 - 5 35 23 - 6 11 8 -0.48 - 77 0 0 - 6 6 54 23 37 59.4 25 116 -7 - 5 59 50 - 6 13 57 - 5 49 2 - 6 24 42 -0.48 - 76 0 0 - 6 19 52 23 37 54.4 26 116 -8 - 6 12 49 - 6 26 54 - 6 2 3 - 6 37 38 -0.48 - 75 0 0 - 6 32 12 23 37 49.3 27 116 -9 - 6 25 10 - 6 39 13 - 6 14 26 - 6 49 55 -0.48 - 74 0 0 - 6 43 53 23 37 44.0 28 116 -10 - 6 36 53 - 6 50 54 - 6 26 10 - 7 1 35 -0.48 - 73 0 0 - 6 54 57 23 37 38.5 29 116 -11 - 6 47 57 - 7 1 56 - 6 37 15 - 7 12 36 -0.48 - 72 0 0 - 7 5 22 23 37 33.0 30 116 -12 - 6 58 23 - 7 12 21 - 6 47 43 - 7 22 59 -0.48 - 71 0 0 - 7 15 9 23 37 27.2 31 116 -13 - 7 8 11 - 7 22 7 - 6 57 32 - 7 32 44 -0.48 - 70 0 0 - 7 24 19 23 37 21.3 32 116 -14 - 7 17 21 - 7 31 16 - 7 6 43 - 7 41 52 -0.48 - 69 0 0 - 7 32 50 23 37 15.3 33 116 -15 - 7 25 54 - 7 39 47 - 7 15 16 - 7 50 22 -0.48 - 68 0 0 - 7 40 44 23 37 9.2 34 116 -16 - 7 33 48 - 7 47 40 - 7 23 12 - 7 58 14 -0.48 - 67 0 0 - 7 48 1 23 37 2.9 35 116 -17 - 7 41 6 - 7 54 56 - 7 30 30 - 8 5 29 -0.48 - 66 0 0 - 7 54 40 23 36 56.5 36 116 -18 - 7 47 45 - 8 1 35 - 7 37 11 - 8 12 7 -0.48 - 65 0 0 - 8 0 43 23 36 49.9 36 116 -19 - 7 53 48 - 8 7 37 - 7 43 14 - 8 18 8 -0.48 - 64 0 0 - 8 6 8 23 36 43.2 37 117 -20 - 7 59 14 - 8 13 1 - 7 48 41 - 8 23 32 -0.48 - 63 0 0 - 8 10 56 23 36 36.4 38 117 -21 - 8 4 2 - 8 17 49 - 7 53 30 - 8 28 19 -0.48 - 62 0 0 - 8 15 7 23 36 29.5 39 117 -22 - 8 8 13 - 8 21 59 - 7 57 42 - 8 32 29 -0.48 - 61 0 0 - 8 18 41 23 36 22.4 40 117 -23 - 8 11 48 - 8 25 33 - 8 1 17 - 8 36 3 -0.48 - 60 0 0 - 8 21 38 23 36 15.2 41 117 -24 - 8 14 46 - 8 28 31 - 8 4 15 - 8 38 59 -0.48 - 59 0 0 - 8 23 59 23 36 7.9 42 117 -25 - 8 17 7 - 8 30 51 - 8 6 36 - 8 41 20 -0.48 - 58 0 0 - 8 25 44 23 36 0.5 43 118 -26 - 8 18 51 - 8 32 35 - 8 8 21 - 8 43 3 -0.48 - 57 0 0 - 8 26 51 23 35 53.0 43 118 -27 - 8 19 59 - 8 33 43 - 8 9 29 - 8 44 11 -0.48 - 56 0 0 - 8 27 23 23 35 45.3 44 118 -28 - 8 20 31 - 8 34 14 - 8 10 1 - 8 44 42 -0.48 - 55 0 0 - 8 27 18 23 35 37.5 45 118 -28 - 8 20 26 - 8 34 9 - 8 9 56 - 8 44 37 -0.48 - 54 0 0 - 8 26 36 23 35 29.7 46 119 -29 - 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Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 321-214813 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 16 43.0075 DE: -25 54 56.787 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 16 43.0075 DE: -25 54 56.787 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.7 * B mag [mag]: 10.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3310) Patsy asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.016 distance from Earth [AU]: 1.93310 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): 0.026", 0.006", 92.467° remarks: * orbital elements for (3310)Patsy : Mean anomaly = 53.9986704538 deg Arg. of pericenter = 132.8274546263 deg Long. of node = 101.3479476063 deg Inclination = 11.0970034887 deg Eccentricity = 0.0592809776 Semimajor axis = 3.0090006281 AU Perihelion dist = 2.8306241292 AU Mag: H = 10.89, G = 0.15 Epoch of elements : MJD 60519.97923933 TDT (2024 Jul 28.9792) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,2.13,2024,7,28,23.501743,-0.168807,0.398648,-5.570071,-2.359677,0.001712,0.000567,0.000001,0.000000 -10.0814,-25.8722,-170.90,18.68,False UCAC4 321-214813,19.27861320,-25.9157742,10.27,9.74,9.45,0.1,0,,19.30415764,-25.8721901,5.40,5.23,0,0,0 3310,Patsy,15.13,22.818,1.9331,0,0,-1.877,-10.73,,2.4,0 0,53.8138,2024,7,28,132.8275,101.3479,11.0970,0.05928,3.00900,2.83062,10.88,5.0,0.15 1.763,0.0263,0.0057,92,0.0124,Known errors,0.97,0,-1,-1 20240728_214813,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org