IOTA/IOTA-ES occultation update for (2220) Hicks / UCAC4 332-111070 event on 2024 Oct 10, 01:23 UT Visible from Summary ------- On 2024 Oct 10 UT, the 16.2377159885135 km diameter asteroid (2220) Hicks will occult a 11.5 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.96 mag to 18.48 mag (the magnitude of the asteroid) for at most 0.620 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: 2024 Oct 10, 01:19 - 2024 Oct 10, 01:26 * geocentric midpoint of event [JD]: 2460593.55766133 * magnitude of target star: 11.52 * magnitude drop [mag]: 6.96 * estimated maximum duration [s]: 0.620 * Moon: 42 % sunlit, 13° distance * Sun: 69° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 95°) * approx speed of asteroid's shadow [km/s]: 26.6126 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 332-111070 by 2220 Hicks on 2024 Oct 10 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 127 0 0 -22 41 38 1 19 29.5 1 115 57 -22 47 15 -22 36 1 -22 51 4 -22 32 13 .... 128 0 0 -23 8 44 1 19 29.6 2 115 58 -23 14 22 -23 3 7 -23 18 11 -22 59 18 0.48 129 0 0 -23 35 56 1 19 29.8 3 115 58 -23 41 34 -23 30 18 -23 45 23 -23 26 29 0.50 130 0 0 -24 3 12 1 19 30.1 4 114 59 -24 8 50 -23 57 34 -24 12 40 -23 53 44 0.50 131 0 0 -24 30 32 1 19 30.5 5 114 60 -24 36 10 -24 24 53 -24 40 0 -24 21 4 0.51 132 0 0 -24 57 54 1 19 31.0 6 113 60 -25 3 34 -24 52 15 -25 7 24 -24 48 26 0.51 133 0 0 -25 25 19 1 19 31.5 7 113 61 -25 30 59 -25 19 40 -25 34 49 -25 15 50 0.51 134 0 0 -25 52 46 1 19 32.2 8 112 61 -25 58 25 -25 47 6 -26 2 16 -25 43 16 0.52 135 0 0 -26 20 13 1 19 32.9 9 112 61 -26 25 53 -26 14 33 -26 29 44 -26 10 42 0.52 136 0 0 -26 47 39 1 19 33.7 10 112 62 -26 53 20 -26 41 59 -26 57 11 -26 38 9 0.52 137 0 0 -27 15 5 1 19 34.6 11 111 62 -27 20 46 -27 9 25 -27 24 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 332-111070 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 40 02.4933 DE: -23 42 09.795 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 40 02.4932 DE: -23 42 09.795 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 12.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2220) Hicks asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.34060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.017", 0.002", 95.494° remarks: * orbital elements for (2220)Hicks : Mean anomaly = 283.8412295627 deg Arg. of pericenter = 282.0788501583 deg Long. of node = 94.6282311927 deg Inclination = 2.5924077919 deg Eccentricity = 0.1547166318 Semimajor axis = 3.1596430363 AU Perihelion dist = 2.6707937080 AU Mag: H = 12.48, G = 0.15 Epoch of elements : MJD 60593.05766138 TDT (2024 Oct 10.0577) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.62,2024,10,10,1.383872,-0.025580,-0.460233,14.998157,-0.826352,0.005427,-0.000184,-0.000001,0.000000 -134.5202,-23.7168,155.99,-6.77,False UCAC4 332-111070,17.66735928,-23.7027207,12.46,11.52,11.01,0.1,0,,17.69232572,-23.7168071,6.96,7.02,0,0,0 2220,Hicks,18.48,16.480,3.3406,0,0,2.876,-2.17,,1.6,0 0,283.6556,2024,10,9,282.0789,94.6282,2.5924,0.15472,3.15964,2.67079,12.48,5.0,0.15 1.339,0.0167,0.0022,95,0.0023,Known errors,0.77,0,-1,-1 20241010_111070,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org