IOTA/IOTA-ES occultation update for (3502) Huangpu / UCAC4 332-130512 event on 2024 Oct 19, 22:22 UT Visible from Summary ------- On 2024 Oct 19 UT, the 21.9544030760482 km diameter asteroid (3502) Huangpu will occult a 8.0 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 9.33 mag to 17.37 mag (the magnitude of the asteroid) for at most 0.710 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 19, 22:19 - 2024 Oct 19, 22:26 * geocentric midpoint of event [JD]: 2460603.43239225 * magnitude of target star: 8.04 * magnitude drop [mag]: 9.33 * estimated maximum duration [s]: 0.710 * Moon: 91 % sunlit, 150° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 93°) * approx speed of asteroid's shadow [km/s]: 31.3778 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 332-130512 by 3502 Huangpu on 2024 Oct 19 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 179 0 0 1 50 14 22 19 15.6 0 114 65 1 43 40 1 56 48 1 40 6 2 0 23 .... -180 0 0 1 23 41 22 19 15.6 1 114 66 1 17 7 1 30 15 1 13 32 1 33 50 0.11 -179 0 0 0 57 7 22 19 15.7 2 114 67 0 50 33 1 3 41 0 46 58 1 7 16 0.05 -178 0 0 0 30 33 22 19 15.9 3 114 68 0 23 59 0 37 7 0 20 24 0 40 42 0.03 -177 0 0 0 3 59 22 19 16.2 5 114 69 - 0 2 35 0 10 33 - 0 6 10 0 14 8 0.02 -176 0 0 - 0 22 34 22 19 16.5 6 114 70 - 0 29 8 - 0 16 0 - 0 32 42 - 0 12 25 0.01 -175 0 0 - 0 49 5 22 19 16.9 7 114 71 - 0 55 39 - 0 42 31 - 0 59 13 - 0 38 56 0.01 -174 0 0 - 1 15 33 22 19 17.4 8 114 72 - 1 22 7 - 1 8 59 - 1 25 41 - 1 5 25 0.00 -173 0 0 - 1 41 59 22 19 18.0 9 114 73 - 1 48 32 - 1 35 25 - 1 52 7 - 1 31 50 0.00 -172 0 0 - 2 8 20 22 19 18.6 10 114 74 - 2 14 54 - 2 1 46 - 2 18 28 - 1 58 12 0.00 -171 0 0 - 2 34 37 22 19 19.3 11 114 75 - 2 41 11 - 2 28 4 - 2 44 45 - 2 24 30 0.00 -170 0 0 - 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4 57 40 - 5 14 18 - 4 54 7 -0.01 - 15 0 0 - 4 38 36 22 25 57.4 12 247 -52 - 4 45 8 - 4 32 3 - 4 48 41 - 4 28 30 0.00 - 14 0 0 - 4 12 50 22 25 58.2 11 247 -53 - 4 19 23 - 4 6 18 - 4 22 57 - 4 2 44 0.00 - 13 0 0 - 3 46 58 22 25 58.9 10 247 -54 - 3 53 31 - 3 40 25 - 3 57 4 - 3 36 51 0.00 - 12 0 0 - 3 20 58 22 25 59.5 9 247 -56 - 3 27 31 - 3 14 25 - 3 31 5 - 3 10 51 0.00 - 11 0 0 - 2 54 52 22 26 0.1 8 246 -57 - 3 1 26 - 2 48 19 - 3 5 0 - 2 44 45 0.00 - 10 0 0 - 2 28 41 22 26 0.6 7 246 -58 - 2 35 14 - 2 22 8 - 2 38 49 - 2 18 33 0.00 - 9 0 0 - 2 2 25 22 26 1.0 6 246 -59 - 2 8 58 - 1 55 51 - 2 12 32 - 1 52 17 0.01 - 8 0 0 - 1 36 4 22 26 1.3 5 246 -60 - 1 42 38 - 1 29 30 - 1 46 12 - 1 25 56 0.01 - 7 0 0 - 1 9 39 22 26 1.6 4 246 -61 - 1 16 13 - 1 3 6 - 1 19 48 - 0 59 31 0.02 - 6 0 0 - 0 43 12 22 26 1.8 2 246 -62 - 0 49 46 - 0 36 38 - 0 53 21 - 0 33 4 0.04 - 5 0 0 - 0 16 43 22 26 2.0 1 246 -63 - 0 23 17 - 0 10 8 - 0 26 51 - 0 6 34 0.08 - 4 0 0 0 9 49 22 26 2.0 0 246 -64 0 3 15 0 16 23 - 0 0 20 0 19 57 0.50 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 332-130512 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 05 29.3666 DE: -23 42 55.936 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 05 29.3666 DE: -23 42 55.936 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 8.0 * B mag [mag]: 8.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3502) Huangpu asteroid class: approx. diameter [km]: 22 approx. diameter ["]: 0.010 distance from Earth [AU]: 2.90370 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): 0.021", 0.003", 92.938° remarks: * orbital elements for (3502)Huangpu : Mean anomaly = 342.6469787115 deg Arg. of pericenter = 211.0157425037 deg Long. of node = 104.8738055010 deg Inclination = 2.8193822032 deg Eccentricity = 0.1710945411 Semimajor axis = 3.1358210475 AU Perihelion dist = 2.5992991843 AU Mag: H = 11.96, G = 0.15 Epoch of elements : MJD 60602.93239216 TDT (2024 Oct 19.9324) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,0.71,2024,10,19,22.377414,-0.000142,0.020450,17.708405,-0.271837,0.005172,0.000048,-0.000001,0.000000 -92.7940,-23.7144,-159.46,-10.41,False UCAC4 332-130512,18.09149077,-23.7155379,8.06,8.04,8.03,0.1,0,,18.11647425,-23.7144332,9.33,8.89,0,0,0 3502,Huangpu,17.37,22.165,2.9037,0,0,3.906,-0.82,,1.8,0 0,342.4815,2024,10,19,211.0157,104.8738,2.8194,0.17109,3.13582,2.59930,11.95,5.0,0.15 1.272,0.0213,0.0028,93,0.0029,Known errors,0.91,0,-1,-1 20241019_130512,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org