IOTA/IOTA-ES occultation update for (1506) Xosa / UCAC4 511-014841 event on 2024 Jan 13, 16:36 UT Visible from Summary ------- On 2024 Jan 13 UT, the 13.2135549493995 km diameter asteroid (1506) Xosa will occult a 11.3 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.68 mag to 16.99 mag (the magnitude of the asteroid) for at most 1.000 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 Jan 13, 16:29 - 2024 Jan 13, 16:43 * geocentric midpoint of event [JD]: 2460323.19192654 * magnitude of target star: 11.32 * magnitude drop [mag]: 5.68 * estimated maximum duration [s]: 1.000 * Moon: 7 % sunlit, 123° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.003", 98°) * approx speed of asteroid's shadow [km/s]: 13.4440 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 511-014841 by 1506 Xosa on 2024 Jan 13 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 1 0 0 -28 1 6 16 43 24.7 1 76 27 -27 56 54 -28 5 18 -27 53 12 -28 9 0 .... 2 0 0 -27 48 9 16 43 24.5 1 76 26 -27 43 56 -27 52 21 -27 40 15 -27 56 3 0.29 3 0 0 -27 35 10 16 43 24.3 2 75 25 -27 30 58 -27 39 23 -27 27 16 -27 43 5 0.38 4 0 0 -27 22 11 16 43 23.9 3 75 24 -27 17 59 -27 26 24 -27 14 17 -27 30 6 0.42 5 0 0 -27 9 12 16 43 23.3 4 74 23 -27 4 59 -27 13 24 -27 1 18 -27 17 6 0.44 6 0 0 -26 56 12 16 43 22.6 5 74 23 -26 52 0 -27 0 24 -26 48 18 -27 4 6 0.45 7 0 0 -26 43 12 16 43 21.8 6 73 22 -26 39 0 -26 47 24 -26 35 18 -26 51 6 0.46 8 0 0 -26 30 12 16 43 20.9 7 73 21 -26 26 0 -26 34 25 -26 22 19 -26 38 7 0.47 9 0 0 -26 17 13 16 43 19.8 8 72 20 -26 13 1 -26 21 26 -26 9 20 -26 25 8 0.48 10 0 0 -26 4 15 16 43 18.5 9 72 19 -26 0 3 -26 8 27 -25 56 22 -26 12 9 0.48 11 0 0 -25 51 18 16 43 17.2 10 72 18 -25 47 6 -25 55 30 -25 43 25 -25 59 12 0.48 12 0 0 -25 38 22 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20.1 1 284 -19 -24 42 31 -24 50 55 -24 38 50 -24 54 37 0.72 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 511-014841 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 48 19.2712 DE: +12 00 58.937 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 48 19.2712 DE: +12 00 58.937 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 12.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1506) Xosa asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.33630 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 27 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): 0.008", 0.003", 98.337° remarks: * orbital elements for (1506)Xosa : Mean anomaly = 172.8862981503 deg Arg. of pericenter = 45.2435365935 deg Long. of node = 234.4585908333 deg Inclination = 12.5665890288 deg Eccentricity = 0.2611907358 Semimajor axis = 2.5706634248 AU Perihelion dist = 1.8992299535 AU Mag: H = 12.03, G = 0.15 Epoch of elements : MJD 60322.69192734 TDT (2024 Jan 13.6919) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr27,1.00,2024,1,13,16.606237,0.012926,-0.454051,-7.585079,-0.216712,0.002623,0.001134,0.000001,0.000000 85.6660,12.0246,-66.95,-21.48,False UCAC4 511-014841,5.80535312,12.0163713,12.43,11.32,10.72,0.1,0,,5.82804942,12.0246489,5.68,5.83,0,0,0 1506,Xosa,16.99,13.383,2.3363,0,0,-1.945,-0.81,,1.4,0 0,172.7208,2024,1,13,45.2435,234.4586,12.5666,0.26119,2.57066,1.89923,12.03,5.0,0.15 1.440,0.0077,0.0033,98,0.0035,Known errors,0.95,0,-1,-1 20240113_014841,60137.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org