IOTA/IOTA-ES occultation update for (56) Melete / UCAC4 367-159872 event on 2024 Nov 21, 21:58 UT Visible from Summary ------- On 2024 Nov 21 UT, the 111.059 km diameter asteroid (56) Melete will occult a 11.9 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 1.47 mag to 13.06 mag (the magnitude of the asteroid) for at most 2.590 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: 2024 Nov 21, 21:56 - 2024 Nov 21, 22:01 * geocentric midpoint of event [JD]: 2460636.41583229 * magnitude of target star: 11.92 * magnitude drop [mag]: 1.47 * estimated maximum duration [s]: 2.590 * Moon: 60 % sunlit, 148° distance * Sun: 47° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 112 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 84°) * approx speed of asteroid's shadow [km/s]: 42.9465 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 367-159872 by 56 Melete on 2024 Nov 21 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 165 0 0 - 8 51 32 21 56 20.3 0 107 47 - 9 23 11 .. .. .. - 9 25 23 .. .. .. .... 166 0 0 - 9 9 32 21 56 20.3 1 107 49 - 9 41 10 - 8 37 55 - 9 43 21 - 8 35 44 0.15 167 0 0 - 9 27 27 21 56 20.4 2 106 50 - 9 59 5 - 8 55 50 -10 1 16 - 8 53 40 0.13 168 0 0 - 9 45 17 21 56 20.5 3 106 51 -10 16 54 - 9 13 41 -10 19 5 - 9 11 30 0.12 169 0 0 -10 3 2 21 56 20.7 4 106 52 -10 34 38 - 9 31 27 -10 36 49 - 9 29 16 0.12 170 0 0 -10 20 41 21 56 20.9 5 106 53 -10 52 17 - 9 49 7 -10 54 28 - 9 46 56 0.11 171 0 0 -10 38 14 21 56 21.2 6 106 54 -11 9 50 -10 6 41 -11 12 0 -10 4 30 0.11 172 0 0 -10 55 41 21 56 21.5 7 106 55 -11 27 16 -10 24 9 -11 29 27 -10 21 58 0.11 173 0 0 -11 13 2 21 56 21.9 8 105 56 -11 44 35 -10 41 30 -11 46 46 -10 39 20 0.11 174 0 0 -11 30 15 21 56 22.3 9 105 57 -12 1 48 -10 58 44 -12 3 59 -10 56 34 0.11 175 0 0 -11 47 21 21 56 22.7 10 105 58 -12 18 53 -11 15 51 -12 21 4 -11 13 41 0.11 176 0 0 -12 4 20 21 56 23.2 11 105 59 -12 35 50 -11 32 51 -12 38 1 -11 30 40 0.11 177 0 0 -12 21 10 21 56 23.8 12 105 60 -12 52 40 -11 49 42 -12 54 50 -11 47 32 0.11 178 0 0 -12 37 52 21 56 24.4 13 104 61 -13 9 21 -12 6 25 -13 11 31 -12 4 15 0.11 179 0 0 -12 54 25 21 56 25.0 14 104 62 -13 25 53 -12 23 0 -13 28 3 -12 20 50 0.11 -180 0 0 -13 10 50 21 56 25.7 15 104 63 -13 42 16 -12 39 25 -13 44 26 -12 37 15 0.11 -179 0 0 -13 27 5 21 56 26.4 16 104 64 -13 58 30 -12 55 41 -14 0 40 -12 53 31 0.11 -178 0 0 -13 43 10 21 56 27.2 17 103 65 -14 14 34 -13 11 48 -14 16 44 -13 9 38 0.11 -177 0 0 -13 59 6 21 56 28.0 19 103 66 -14 30 28 -13 27 45 -14 32 38 -13 25 35 0.10 -176 0 0 -14 14 51 21 56 28.9 20 103 67 -14 46 12 -13 43 31 -14 48 22 -13 41 22 0.10 -175 0 0 -14 30 26 21 56 29.8 21 103 68 -15 1 46 -13 59 7 -15 3 56 -13 56 58 0.10 -174 0 0 -14 45 50 21 56 30.7 22 102 69 -15 17 9 -14 14 33 -15 19 18 -14 12 23 0.10 -173 0 0 -15 1 3 21 56 31.7 23 102 70 -15 32 20 -14 29 47 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Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 367-159872 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 10 33.0737 DE: -16 38 55.825 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 10 33.0736 DE: -16 38 55.825 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (56) Melete asteroid class: approx. diameter [km]: 111 approx. diameter ["]: 0.061 distance from Earth [AU]: 2.51700 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#129 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): 0.009", 0.002", 84.316° remarks: * orbital elements for (56)Melete : Mean anomaly = 6.2972177142 deg Arg. of pericenter = 104.8954685899 deg Long. of node = 192.9361773140 deg Inclination = 8.0812386411 deg Eccentricity = 0.2370969194 Semimajor axis = 2.5971073051 AU Perihelion dist = 1.9813411638 AU Mag: H = 8.53, G = 0.15 Epoch of elements : MJD 60635.91583221 TDT (2024 Nov 21.9158) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1292023Apr24,2.59,2024,11,21,21.979975,0.005117,-0.099166,24.196237,1.459342,0.003917,0.000854,-0.000001,0.000000 -103.0982,-16.6089,-153.18,-20.17,False UCAC4 367-159872,19.17585386,-16.6488402,12.48,11.92,11.62,0.0,0,,19.19944222,-16.6089065,1.47,1.36,0,0,0 56,Melete,13.06,111.059,2.5170,0,0,5.882,5.10,,5.6,0 0,6.0815,2024,11,21,104.8955,192.9362,8.0812,0.23710,2.59711,1.98134,8.52,5.0,0.15 1.035,0.0090,0.0021,84,0.0021,Known errors,0.77,0,-1,-1 20241121_159872,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org