IOTA/IOTA-ES occultation update for (1250) Galanthus / UCAC4 378-167447 event on 2024 Jul 18, 09:28 UT Visible from Summary ------- On 2024 Jul 18 UT, the 20.549 km diameter asteroid (1250) Galanthus will occult a 11.1 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.73 mag to 16.83 mag (the magnitude of the asteroid) for at most 1.330 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: 96 * date and approx. time of event: 2024 Jul 18, 09:22 - 2024 Jul 18, 09:34 * geocentric midpoint of event [JD]: 2460509.89472562 * magnitude of target star: 11.11 * magnitude drop [mag]: 5.73 * estimated maximum duration [s]: 1.330 * Moon: 89 % sunlit, 50° distance * Sun: 169° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 65°) * approx speed of asteroid's shadow [km/s]: 15.4156 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 378-167447 by 1250 Galanthus on 2024 Jul 18 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 131 0 0 -25 8 5 9 34 33.6 0 106 -11 -25 1 37 -25 14 33 -24 56 23 -25 19 47 .... 132 0 0 -25 23 47 9 34 33.5 1 105 -12 -25 17 19 -25 30 16 -25 12 6 -25 35 30 0.41 133 0 0 -25 39 30 9 34 33.2 2 105 -13 -25 33 2 -25 45 59 -25 27 49 -25 51 13 0.44 134 0 0 -25 55 13 9 34 32.8 3 105 -14 -25 48 45 -26 1 42 -25 43 32 -26 6 56 0.46 135 0 0 -26 10 56 9 34 32.3 4 104 -15 -26 4 28 -26 17 24 -25 59 14 -26 22 39 0.47 136 0 0 -26 26 38 9 34 31.7 5 104 -16 -26 20 10 -26 33 6 -26 14 56 -26 38 21 0.47 137 0 0 -26 42 19 9 34 31.0 6 103 -17 -26 35 51 -26 48 47 -26 30 37 -26 54 2 0.48 138 0 0 -26 57 59 9 34 30.1 7 103 -18 -26 51 30 -27 4 27 -26 46 17 -27 9 42 0.48 139 0 0 -27 13 37 9 34 29.2 8 102 -19 -27 7 8 -27 20 5 -27 1 55 -27 25 20 0.48 140 0 0 -27 29 13 9 34 28.1 9 102 -20 -27 22 45 -27 35 42 -27 17 31 -27 40 56 0.48 141 0 0 -27 44 47 9 34 26.9 10 101 -21 -27 38 19 -27 51 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17 51 -27 59 40 -28 23 5 0.57 - 36 0 0 -27 55 49 9 22 15.9 4 256 1 -27 49 21 -28 2 18 -27 44 8 -28 7 32 0.59 - 35 0 0 -27 40 14 9 22 15.5 3 255 2 -27 33 45 -27 46 42 -27 28 32 -27 51 57 0.62 - 34 0 0 -27 24 36 9 22 15.2 2 255 3 -27 18 7 -27 31 4 -27 12 54 -27 36 19 0.68 - 33 0 0 -27 8 55 9 22 15.0 1 254 4 -27 2 27 -27 15 24 -26 57 14 -27 20 38 0.88 - 32 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -27 4 56 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 378-167447 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 29 29.9588 DE: -14 33 56.006 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 29 29.9589 DE: -14 33 56.006 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1250) Galanthus asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.013 distance from Earth [AU]: 2.12410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.011", 0.002", 64.836° remarks: * orbital elements for (1250)Galanthus : Mean anomaly = 136.5477498230 deg Arg. of pericenter = 217.5771574590 deg Long. of node = 291.9282207776 deg Inclination = 15.1732823724 deg Eccentricity = 0.2761366718 Semimajor axis = 2.5477074756 AU Perihelion dist = 1.8441920126 AU Mag: H = 12.38, G = 0.15 Epoch of elements : MJD 60509.39472588 TDT (2024 Jul 18.3947) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,1.33,2024,7,18,9.473415,-0.007745,-0.449198,-8.699702,0.148504,-0.000841,-0.000637,0.000001,0.000000 -131.0635,-14.4830,39.48,20.90,False UCAC4 378-167447,20.49165523,-14.5655573,11.44,11.11,10.93,0.0,0,,20.51484488,-14.4830352,5.73,5.46,0,0,0 1250,Galanthus,16.83,20.549,2.1241,0,0,-2.479,0.62,,1.2,0 0,136.4521,2024,7,18,217.5772,291.9282,15.1733,0.27614,2.54771,1.84419,12.38,5.0,0.15 1.404,0.0113,0.0023,65,0.0054,Known errors,1.50,0,-1,-1 20240718_167447,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org