IOTA/IOTA-ES occultation update for (175114) 2004 QQ / UCAC4 384-137036 event on 2024 Nov 09, 00:45 UT Visible from Summary ------- On 2024 Nov 09 UT, the 1.564 km diameter asteroid (175114) 2004 QQ will occult a 13.3 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 4.75 mag to 18.06 mag (the magnitude of the asteroid) for at most 0.050 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: 4 * date and approx. time of event: 2024 Nov 09, 00:42 - 2024 Nov 09, 00:49 * geocentric midpoint of event [JD]: 2460623.53191146 * magnitude of target star: 13.32 * magnitude drop [mag]: 4.75 * estimated maximum duration [s]: 0.050 * Moon: 47 % sunlit, 26° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 14.14 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.138, +/- 0.082) * 1 sigma uncertainty ellipse (major, minor, PA): (0.157", 0.031", 61°) * approx speed of asteroid's shadow [km/s]: 33.0368 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 384-137036 by 175114 2004 QQ on 2024 Nov 9 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 140 0 0 - 5 4 55 0 42 46.1 0 103 63 - 5 5 21 - 5 4 29 - 5 17 44 - 4 52 5 .... 141 0 0 - 5 18 57 0 42 46.2 1 103 64 - 5 19 24 - 5 18 31 - 5 31 46 - 5 6 8 0.00 142 0 0 - 5 32 43 0 42 46.3 2 103 65 - 5 33 10 - 5 32 17 - 5 45 31 - 5 19 55 -0.07 143 0 0 - 5 46 13 0 42 46.4 3 103 65 - 5 46 40 - 5 45 47 - 5 59 1 - 5 33 26 -0.09 144 0 0 - 5 59 27 0 42 46.7 4 103 66 - 5 59 53 - 5 59 0 - 6 12 13 - 5 46 40 -0.11 145 0 0 - 6 12 24 0 42 47.0 5 103 67 - 6 12 50 - 6 11 57 - 6 25 9 - 5 59 37 -0.11 146 0 0 - 6 25 3 0 42 47.3 6 103 68 - 6 25 30 - 6 24 37 - 6 37 48 - 6 12 18 -0.12 147 0 0 - 6 37 26 0 42 47.7 7 103 69 - 6 37 52 - 6 37 0 - 6 50 10 - 6 24 41 -0.12 148 0 0 - 6 49 32 0 42 48.2 8 102 70 - 6 49 58 - 6 49 5 - 7 2 15 - 6 36 48 -0.12 149 0 0 - 7 1 20 0 42 48.7 9 102 71 - 7 1 46 - 7 0 53 - 7 14 3 - 6 48 36 -0.13 150 0 0 - 7 12 50 0 42 49.3 10 102 72 - 7 13 16 - 7 12 24 - 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46 0 0 21 4 57 0 49 8.2 0 256 -62 21 4 31 21 5 24 20 52 5 21 17 50 -0.07 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 384-137036 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 20 29.2569 DE: -13 16 11.463 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 20 29.2569 DE: -13 16 11.463 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 13.3 * B mag [mag]: 13.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (175114) 2004 QQ asteroid class: approx. diameter [km]: 2 approx. diameter ["]: 0.004 distance from Earth [AU]: 0.58060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2023 Mar 01 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): 0.157", 0.031", 60.64° remarks: * orbital elements for (175114)2004 QQ : Mean anomaly = 8.8913027564 deg Arg. of pericenter = 31.4893568299 deg Long. of node = 288.0796179434 deg Inclination = 5.7189517351 deg Eccentricity = 0.6632856111 Semimajor axis = 2.2497771189 AU Perihelion dist = 0.7575323278 AU Mag: H = 16.64, G = 0.15 Epoch of elements : MJD 60623.03191146 TDT (2024 Nov 09.0319) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Mar01,0.05,2024,11,9,0.765875,-0.033471,0.139193,18.139741,4.319268,-0.001898,-0.000413,0.000001,0.000000 -129.7116,-13.2239,164.47,-16.94,False UCAC4 384-137036,19.34146036,-13.2698506,13.94,13.32,12.99,0.0,0,,19.36450598,-13.2239090,4.75,4.64,0,0,0 175114,2004 QQ,18.06,1.564,0.5806,0,0,18.821,65.49,,0.2,0 0,8.5899,2024,11,8,31.4894,288.0796,5.7190,0.66329,2.24978,0.75753,16.64,5.0,0.15 15.069,0.1573,0.0310,61,0.0525,Known errors,1.04,0,-1,-1 20241109_137036,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org