IOTA/IOTA-ES occultation update for (72) Feronia / UCAC4 525-037836 event on 2023 Dec 07, 21:34 UT Visible from S Africa Summary ------- On 2023 Dec 07 UT, the 80 km diameter asteroid (72) Feronia will occult a 12.2 mag star in the constellation Gemini for observers along a path across S Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.09 mag to 12.77 mag (the magnitude of the asteroid) for at most 8.660 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: 100 * date and approx. time of event: 2023 Dec 07, 21:24 - 2023 Dec 07, 21:44 * geocentric midpoint of event [JD]: 2460286.39909550 * magnitude of target star: 12.18 * magnitude drop [mag]: 1.09 * estimated maximum duration [s]: 8.660 * Moon: 25 % sunlit, 90° distance * Sun: 149° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.001", 97°) * approx speed of asteroid's shadow [km/s]: 9.2371 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 525-037836 by 72 Feronia on 2023 Dec 7 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 - 14 0 0 -38 37 35 21 44 20.6 0 71 -15 -38 10 8 -39 5 11 -38 8 50 -39 6 29 .... - 13 0 0 -38 21 7 21 44 20.4 1 70 -16 -37 53 39 -38 48 45 -37 52 22 -38 50 3 0.34 - 12 0 0 -38 4 33 21 44 20.1 2 69 -17 -37 37 4 -38 32 11 -37 35 47 -38 33 29 0.47 - 11 0 0 -37 47 51 21 44 19.6 3 69 -18 -37 20 22 -38 15 29 -37 19 4 -38 16 48 0.52 - 10 0 0 -37 31 2 21 44 18.9 4 68 -18 -37 3 32 -37 58 41 -37 2 15 -38 0 0 0.55 - 9 0 0 -37 14 7 21 44 18.0 5 68 -19 -36 46 37 -37 41 47 -36 45 19 -37 43 5 0.57 - 8 0 0 -36 57 6 21 44 17.0 5 67 -20 -36 29 35 -37 24 46 -36 28 18 -37 26 5 0.59 - 7 0 0 -36 39 59 21 44 15.7 6 66 -20 -36 12 28 -37 7 40 -36 11 10 -37 8 58 0.60 - 6 0 0 -36 22 47 21 44 14.3 7 66 -21 -35 55 15 -36 50 28 -35 53 58 -36 51 46 0.60 - 5 0 0 -36 5 29 21 44 12.7 8 65 -22 -35 37 57 -36 33 11 -35 36 40 -36 34 29 0.61 - 4 0 0 -35 48 7 21 44 10.9 9 65 -23 -35 20 35 -36 15 49 -35 19 18 -36 17 7 0.62 - 3 0 0 -35 30 41 21 44 9.0 10 64 -23 -35 3 9 -35 58 22 -35 1 51 -35 59 41 0.62 - 2 0 0 -35 13 11 21 44 6.8 11 63 -24 -34 45 38 -35 40 52 -34 44 21 -35 42 11 0.62 - 1 0 0 -34 55 37 21 44 4.5 11 63 -25 -34 28 4 -35 23 18 -34 26 47 -35 24 37 0.63 - 0 0 0 -34 37 59 21 44 1.9 12 62 -25 -34 10 27 -35 5 41 -34 9 10 -35 6 59 0.63 1 0 0 -34 20 19 21 43 59.2 13 62 -26 -33 52 47 -34 48 1 -33 51 30 -34 49 19 0.63 2 0 0 -34 2 37 21 43 56.3 14 61 -27 -33 35 5 -34 30 18 -33 33 48 -34 31 36 0.63 3 0 0 -33 44 52 21 43 53.2 15 60 -27 -33 17 21 -34 12 33 -33 16 3 -34 13 51 0.64 4 0 0 -33 27 6 21 43 49.9 16 60 -28 -32 59 35 -33 54 46 -32 58 17 -33 56 5 0.64 5 0 0 -33 9 19 21 43 46.4 17 59 -29 -32 41 48 -33 36 58 -32 40 30 -33 38 17 0.64 6 0 0 -32 51 30 21 43 42.7 17 59 -29 -32 24 0 -33 19 10 -32 22 43 -33 20 28 0.64 7 0 0 -32 33 41 21 43 38.8 18 58 -30 -32 6 12 -33 1 20 -32 4 54 -33 2 38 0.64 8 0 0 -32 15 52 21 43 34.8 19 57 -31 -31 48 23 -32 43 31 -31 47 6 -32 44 49 0.64 9 0 0 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17 -17 48 41 -18 43 31 0.66 120 0 0 -18 24 13 21 26 46.6 29 299 2 -17 58 4 -18 50 29 -17 56 50 -18 51 44 0.66 121 0 0 -18 32 41 21 26 40.2 28 299 2 -18 6 31 -18 58 59 -18 5 17 -19 0 14 0.66 122 0 0 -18 41 28 21 26 34.0 27 298 3 -18 15 16 -19 7 47 -18 14 2 -19 9 2 0.66 123 0 0 -18 50 31 21 26 28.0 26 298 4 -18 24 18 -19 16 53 -18 23 4 -19 18 7 0.66 124 0 0 -18 59 53 21 26 22.2 25 297 5 -18 33 38 -19 26 15 -18 32 24 -19 27 30 0.66 125 0 0 -19 9 32 21 26 16.6 24 297 6 -18 43 15 -19 35 56 -18 42 1 -19 37 11 0.66 126 0 0 -19 19 28 21 26 11.2 23 296 7 -18 53 10 -19 45 53 -18 51 56 -19 47 8 0.66 127 0 0 -19 29 41 21 26 5.9 22 296 8 -19 3 21 -19 56 8 -19 2 7 -19 57 23 0.67 128 0 0 -19 40 11 21 26 0.9 22 296 9 -19 13 50 -20 6 40 -19 12 35 -20 7 55 0.67 129 0 0 -19 50 57 21 25 56.0 21 295 10 -19 24 35 -20 17 28 -19 23 20 -20 18 43 0.67 130 0 0 -20 2 1 21 25 51.4 20 295 11 -19 35 36 -20 28 34 -19 34 22 -20 29 49 0.67 131 0 0 -20 13 21 21 25 46.9 19 294 12 -19 46 54 -20 39 55 -19 45 40 -20 41 10 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21 25 8.0 7 289 24 -22 37 12 -23 31 1 -22 35 56 -23 32 18 0.69 145 0 0 -23 18 50 21 25 6.6 6 289 25 -22 51 57 -23 45 51 -22 50 41 -23 47 7 0.70 146 0 0 -23 33 50 21 25 5.3 5 288 26 -23 6 56 -24 0 53 -23 5 40 -24 2 10 0.70 147 0 0 -23 49 3 21 25 4.3 4 288 27 -23 22 7 -24 16 8 -23 20 51 -24 17 25 0.71 148 0 0 -24 4 28 21 25 3.5 3 288 28 -23 37 30 -24 31 35 -23 36 14 -24 32 52 0.73 149 0 0 -24 20 5 21 25 2.9 2 287 29 -23 53 5 -24 47 14 -23 51 49 -24 48 31 0.76 150 0 0 -24 35 54 21 25 2.6 1 287 30 -24 8 52 -25 3 5 -24 7 36 -25 4 22 0.85 151 0 0 -24 51 54 21 25 2.5 0 286 30 -24 24 51 .. .. .. -24 23 35 .. .. .. 2.90 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 525-037836 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 01 38.1156 DE: +14 52 11.632 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 01 38.1156 DE: +14 52 11.632 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (72) Feronia asteroid class: approx. diameter [km]: 80 approx. diameter ["]: 0.070 distance from Earth [AU]: 1.57270 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#139 date of fit: 2023 Oct 09 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): 0.006", 0.001", 96.655° remarks: * orbital elements for (72)Feronia : Mean anomaly = 133.7026387957 deg Arg. of pericenter = 102.9358196506 deg Long. of node = 207.9348331525 deg Inclination = 5.4184826890 deg Eccentricity = 0.1214089506 Semimajor axis = 2.2658297008 AU Perihelion dist = 1.9907376945 AU Mag: H = 9.12, G = 0.15 Epoch of elements : MJD 60285.89909722 TDT (2023 Dec 07.8991) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1392023Oct09,8.66,2023,12,7,21.578292,0.068551,-0.538615,-5.172022,-0.657734,-0.002833,0.000996,0.000001,0.000000 65.6826,14.8363,-145.80,-22.65,False UCAC4 525-037836,7.02725434,14.8698978,0.00,12.18,0.00,0.0,0,,7.05018802,14.8363165,1.09,0.00,0,0,1 72,Feronia,12.77,80.000,1.5727,0,0,-1.995,-3.68,,4.0,0 0,133.4428,2023,12,7,102.9358,207.9348,5.4185,0.12141,2.26583,1.99074,9.11,5.0,0.15 1.024,0.0063,0.0007,97,0.0064,Known errors,-1.00,0,-1,-1 20231207_037836,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org