IOTA/IOTA-ES occultation update for (5625) Jamesferguson / UCAC4 382-130993 event on 2024 Oct 16, 22:51 UT Visible from Summary ------- On 2024 Oct 16 UT, the 14.9748368512996 km diameter asteroid (5625) Jamesferguson will occult a 10.9 mag star in the constellation Scutum for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.42 mag to 18.28 mag (the magnitude of the asteroid) for at most 0.820 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 16, 22:46 - 2024 Oct 16, 22:56 * geocentric midpoint of event [JD]: 2460600.45244117 * magnitude of target star: 10.86 * magnitude drop [mag]: 7.42 * estimated maximum duration [s]: 0.820 * Moon: 100 % sunlit, 92° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 91°) * approx speed of asteroid's shadow [km/s]: 22.2814 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 382-130993 by 5625 Jamesferguson on 2024 Oct 16 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 -172 0 0 3 18 28 22 46 46.7 0 104 76 3 13 20 3 23 36 3 10 22 3 26 34 3 15 13 3 21 43 .... -171 0 0 3 3 37 22 46 46.7 1 104 76 2 58 29 3 8 46 2 55 31 3 11 44 3 0 22 3 6 53 0.14 -170 0 0 2 48 34 22 46 46.9 2 104 77 2 43 26 2 53 43 2 40 28 2 56 41 2 45 19 2 51 50 0.13 -169 0 0 2 33 19 22 46 47.1 3 104 78 2 28 10 2 38 28 2 25 12 2 41 26 2 30 4 2 36 35 0.13 -168 0 0 2 17 53 22 46 47.5 4 104 78 2 12 44 2 23 2 2 9 45 2 26 0 2 14 37 2 21 8 0.13 -167 0 0 2 2 14 22 46 47.9 5 104 79 1 57 5 2 7 24 1 54 7 2 10 22 1 58 59 2 5 30 0.13 -166 0 0 1 46 25 22 46 48.5 6 104 79 1 41 16 1 51 35 1 38 17 1 54 33 1 43 9 1 49 41 0.13 -165 0 0 1 30 25 22 46 49.1 7 104 79 1 25 16 1 35 35 1 22 17 1 38 34 1 27 9 1 33 41 0.13 -164 0 0 1 14 15 22 46 49.8 8 104 79 1 9 5 1 19 25 1 6 6 1 22 24 1 10 59 1 17 31 0.13 -163 0 0 0 57 54 22 46 50.6 9 104 79 0 52 44 1 3 4 0 49 45 1 6 3 0 54 38 1 1 10 0.13 -162 0 0 0 41 23 22 46 51.5 11 104 79 0 36 13 0 46 34 0 33 14 0 49 33 0 38 7 0 44 40 0.13 -161 0 0 0 24 43 22 46 52.5 12 104 79 0 19 33 0 29 54 0 16 33 0 32 53 0 21 27 0 28 0 0.13 -160 0 0 0 7 54 22 46 53.6 13 104 79 0 2 43 0 13 4 - 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18 26 16 - 18 19 48 0.14 1 0 0 -18 10 0 22 56 12.7 8 258 -60 -18 15 7 -18 4 53 -18 18 4 -18 1 56 - 18 13 14 - 18 6 46 0.14 2 0 0 -17 56 45 22 56 13.3 7 258 -61 -18 1 52 -17 51 38 -18 4 49 -17 48 40 - 17 59 59 - 17 53 30 0.14 3 0 0 -17 43 16 22 56 13.8 6 257 -62 -17 48 23 -17 38 9 -17 51 21 -17 35 11 - 17 46 31 - 17 40 2 0.15 4 0 0 -17 29 35 22 56 14.3 5 257 -62 -17 34 42 -17 24 27 -17 37 40 -17 21 30 - 17 32 50 - 17 26 20 0.15 5 0 0 -17 15 41 22 56 14.6 4 257 -63 -17 20 49 -17 10 33 -17 23 47 -17 7 36 - 17 18 56 - 17 12 26 0.16 6 0 0 -17 1 35 22 56 14.9 3 257 -63 -17 6 43 -16 56 27 -17 9 41 -16 53 29 - 17 4 50 - 16 58 20 0.18 7 0 0 -16 47 17 22 56 15.1 2 256 -63 -16 52 25 -16 42 9 -16 55 23 -16 39 11 - 16 50 32 - 16 44 2 0.21 8 0 0 -16 32 47 22 56 15.2 1 256 -64 -16 37 55 -16 27 38 -16 40 53 -16 24 40 - 16 36 2 - 16 29 32 0.34 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 382-130993 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 57 09.4019 DE: -13 43 01.254 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 57 09.4019 DE: -13 43 01.254 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.600,0.500) * V mag [mag]: 10.9 * B mag [mag]: 13.5 * Diameter [mas]: 1.80 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5625) Jamesferguson asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.50800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2023 Apr 25 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", 90.748° remarks: * orbital elements for (5625)Jamesferguson : Mean anomaly = 295.7348569873 deg Arg. of pericenter = 217.6020886672 deg Long. of node = 174.7976205491 deg Inclination = 11.9686026050 deg Eccentricity = 0.1926465891 Semimajor axis = 2.6743835672 AU Perihelion dist = 2.1591726952 AU Mag: H = 13.18, G = 0.15 Epoch of elements : MJD 60599.95244109 TDT (2024 Oct 16.9524) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr25,0.82,2024,10,16,22.858588,-0.020637,-0.114224,12.381593,-2.203976,0.005535,0.000716,0.000000,0.000000 -84.1840,-13.6844,-166.54,-9.34,False UCAC4 382-130993,18.95261168,-13.7170149,13.53,10.86,9.42,1.8,4,,18.97583921,-13.6844211,7.42,8.41,0,0,0 5625,Jamesferguson,18.28,18.249,2.5080,0,0,2.979,-7.72,,1.4,0 0,295.5202,2024,10,16,217.6021,174.7976,11.9686,0.19265,2.67438,2.15917,13.17,5.0,0.15 1.289,0.0107,0.0024,91,0.0029,Known errors,1.15,0,-1,-1 20241016_130993,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org