IOTA/IOTA-ES occultation update for (1078) Mentha / UCAC4 316-226797 event on 2024 Oct 11, 04:06 UT Visible from Summary ------- On 2024 Oct 11 UT, the 11.949 km diameter asteroid (1078) Mentha will occult a 11.8 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 4.77 mag to 16.56 mag (the magnitude of the asteroid) for at most 0.700 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: 98 * date and approx. time of event: 2024 Oct 11, 04:00 - 2024 Oct 11, 04:12 * geocentric midpoint of event [JD]: 2460594.67112275 * magnitude of target star: 11.80 * magnitude drop [mag]: 4.77 * estimated maximum duration [s]: 0.700 * Moon: 54 % sunlit, 6° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 86°) * approx speed of asteroid's shadow [km/s]: 17.1766 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 316-226797 by 1078 Mentha on 2024 Oct 11 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 104 0 0 -27 46 29 4 0 43.7 1 120 66 -27 50 36 -27 42 22 -27 53 32 -27 39 27 .... 105 0 0 -28 18 5 4 0 43.9 2 120 66 -28 22 12 -28 13 58 -28 25 8 -28 11 3 0.42 106 0 0 -28 49 30 4 0 44.2 3 119 66 -28 53 37 -28 45 23 -28 56 33 -28 42 28 0.43 107 0 0 -29 20 43 4 0 44.6 4 119 66 -29 24 50 -29 16 37 -29 27 46 -29 13 41 0.43 108 0 0 -29 51 44 4 0 45.1 5 118 66 -29 55 51 -29 47 38 -29 58 47 -29 44 43 0.43 109 0 0 -30 22 32 4 0 45.8 6 118 66 -30 26 39 -30 18 26 -30 29 34 -30 15 30 0.44 110 0 0 -30 53 5 4 0 46.6 7 117 66 -30 57 12 -30 48 59 -31 0 7 -30 46 4 0.44 111 0 0 -31 23 24 4 0 47.5 8 117 65 -31 27 30 -31 19 18 -31 30 25 -31 16 23 0.44 112 0 0 -31 53 27 4 0 48.5 9 116 65 -31 57 33 -31 49 21 -32 0 28 -31 46 27 0.44 113 0 0 -32 23 13 4 0 49.6 10 116 65 -32 27 19 -32 19 8 -32 30 14 -32 16 13 0.44 114 0 0 -32 52 43 4 0 50.9 11 115 64 -32 56 48 -32 48 37 -32 59 43 -32 45 43 0.44 115 0 0 -33 21 54 4 0 52.2 12 115 64 -33 25 59 -33 17 49 -33 28 54 -33 14 55 0.44 116 0 0 -33 50 47 4 0 53.7 13 114 63 -33 54 52 -33 46 43 -33 57 46 -33 43 49 0.44 117 0 0 -34 19 21 4 0 55.2 14 114 63 -34 23 26 -34 15 17 -34 26 20 -34 12 24 0.44 118 0 0 -34 47 36 4 0 56.9 15 113 62 -34 51 40 -34 43 32 -34 54 33 -34 40 39 0.44 119 0 0 -35 15 30 4 0 58.6 15 112 62 -35 19 34 -35 11 27 -35 22 27 -35 8 34 0.44 120 0 0 -35 43 4 4 1 0.4 16 112 61 -35 47 7 -35 39 1 -35 50 0 -35 36 8 0.44 121 0 0 -36 10 16 4 1 2.4 17 111 61 -36 14 19 -36 6 14 -36 17 11 -36 3 21 0.44 122 0 0 -36 37 7 4 1 4.4 18 110 60 -36 41 9 -36 33 5 -36 44 1 -36 30 13 0.44 123 0 0 -37 3 35 4 1 6.5 19 110 60 -37 7 37 -36 59 34 -37 10 29 -36 56 42 0.44 124 0 0 -37 29 41 4 1 8.6 20 109 59 -37 33 42 -37 25 40 -37 36 34 -37 22 49 0.44 125 0 0 -37 55 24 4 1 10.9 21 108 58 -37 59 25 -37 51 24 -38 2 16 -37 48 33 0.44 126 0 0 -38 20 44 4 1 13.2 22 108 58 -38 24 44 -38 16 44 -38 27 35 -38 13 53 0.44 127 0 0 -38 45 40 4 1 15.6 23 107 57 -38 49 40 -38 41 41 -38 52 30 -38 38 51 0.44 128 0 0 -39 10 13 4 1 18.1 24 106 56 -39 14 12 -39 6 14 -39 17 1 -39 3 24 0.44 129 0 0 -39 34 21 4 1 20.6 24 106 56 -39 38 19 -39 30 23 -39 41 9 -39 27 33 0.44 130 0 0 -39 58 5 4 1 23.2 25 105 55 -40 2 3 -39 54 7 -40 4 52 -39 51 18 0.44 131 0 0 -40 21 24 4 1 25.9 26 104 54 -40 25 21 -40 17 27 -40 28 10 -40 14 39 0.44 132 0 0 -40 44 19 4 1 28.6 27 103 54 -40 48 15 -40 40 22 -40 51 4 -40 37 34 0.44 133 0 0 -41 6 49 4 1 31.4 28 103 53 -41 10 45 -41 2 53 -41 13 32 -41 0 5 0.44 134 0 0 -41 28 53 4 1 34.2 29 102 52 -41 32 49 -41 24 58 -41 35 36 -41 22 11 0.44 135 0 0 -41 50 33 4 1 37.1 29 101 52 -41 54 28 -41 46 39 -41 57 15 -41 43 52 0.44 136 0 0 -42 11 48 4 1 40.1 30 100 51 -42 15 42 -42 7 54 -42 18 28 -42 5 8 0.44 137 0 0 -42 32 37 4 1 43.1 31 100 50 -42 36 30 -42 28 44 -42 39 16 -42 25 58 0.44 138 0 0 -42 53 1 4 1 46.1 32 99 50 -42 56 53 -42 49 8 -42 59 39 -42 46 23 0.44 139 0 0 -43 12 59 4 1 49.1 33 98 49 -43 16 51 -43 9 7 -43 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0.54 - 60 0 0 -15 24 29 4 12 5.1 3 243 -67 -15 28 31 -15 20 27 -15 31 23 -15 17 35 0.58 - 59 0 0 -14 52 57 4 12 5.5 2 243 -67 -14 56 59 -14 48 56 -14 59 51 -14 46 4 0.65 - 58 0 0 -14 21 40 4 12 5.7 1 242 -67 -14 25 41 -14 17 39 -14 28 32 -14 14 48 0.89 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 316-226797 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 14 13.0204 DE: -26 59 55.723 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 14 13.0201 DE: -26 59 55.724 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1078) Mentha asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.40310 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.010", 0.002", 85.534° remarks: * orbital elements for (1078)Mentha : Mean anomaly = 168.8823745286 deg Arg. of pericenter = 44.3463874092 deg Long. of node = 93.7558829148 deg Inclination = 7.3651719773 deg Eccentricity = 0.1381068873 Semimajor axis = 2.2695935235 AU Perihelion dist = 1.9561470266 AU Mag: H = 11.51, G = 0.15 Epoch of elements : MJD 60594.17112250 TDT (2024 Oct 11.1711) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,0.70,2024,10,11,4.106946,0.053670,-0.390697,9.608044,1.295204,0.005643,0.000725,0.000000,0.000000 -152.9110,-26.9575,115.07,-7.19,False UCAC4 316-226797,19.23695015,-26.9988120,12.24,11.80,11.56,0.0,0,K,19.26250876,-26.9575398,4.77,4.56,0,0,0 1078,Mentha,16.56,11.949,2.4031,0,0,2.630,4.74,,0.8,0 0,168.8330,2024,10,11,44.3464,93.7559,7.3652,0.13811,2.26959,1.95615,11.51,5.0,0.15 1.355,0.0097,0.0024,86,0.0024,Known errors,0.80,0,-1,-1 20241011_226797,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org