IOTA/IOTA-ES occultation update for (7880) 1992 OM7 / TYC 6809-00181-1 event on 2024 Oct 11, 23:10 UT Visible from Summary ------- On 2024 Oct 11 UT, the 16.893 km diameter asteroid (7880) 1992 OM7 will occult a 11.2 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.48 mag to 18.65 mag (the magnitude of the asteroid) for at most 0.480 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, 23:07 - 2024 Oct 11, 23:12 * geocentric midpoint of event [JD]: 2460595.46528734 * magnitude of target star: 11.17 * magnitude drop [mag]: 7.48 * estimated maximum duration [s]: 0.480 * Moon: 62 % sunlit, 49° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 94°) * approx speed of asteroid's shadow [km/s]: 35.3848 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6809-00181-1 by 7880 1992 OM7 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 149 0 0 -13 5 51 23 7 10.3 0 114 49 -13 11 10 -13 0 32 -13 14 54 -12 56 48 .... 150 0 0 -13 32 16 23 7 10.4 2 114 50 -13 37 36 -13 26 57 -13 41 20 -13 23 13 0.33 151 0 0 -13 58 50 23 7 10.5 3 114 51 -14 4 10 -13 53 30 -14 7 54 -13 49 46 0.34 152 0 0 -14 25 30 23 7 10.7 4 113 52 -14 30 50 -14 20 10 -14 34 34 -14 16 25 0.34 153 0 0 -14 52 15 23 7 11.0 5 113 53 -14 57 36 -14 46 55 -15 1 21 -14 43 11 0.34 154 0 0 -15 19 6 23 7 11.3 6 113 54 -15 24 27 -15 13 46 -15 28 12 -15 10 1 0.34 155 0 0 -15 46 2 23 7 11.7 7 112 55 -15 51 23 -15 40 41 -15 55 8 -15 36 56 0.34 156 0 0 -16 13 1 23 7 12.1 8 112 56 -16 18 22 -16 7 40 -16 22 8 -16 3 55 0.34 157 0 0 -16 40 3 23 7 12.7 9 112 57 -16 45 25 -16 34 42 -16 49 10 -16 30 57 0.35 158 0 0 -17 7 8 23 7 13.2 10 112 58 -17 12 30 -17 1 47 -17 16 15 -16 58 1 0.35 159 0 0 -17 34 14 23 7 13.9 11 111 58 -17 39 36 -17 28 53 -17 43 22 -17 25 7 0.35 160 0 0 -18 1 21 23 7 14.6 12 111 59 -18 6 43 -17 56 0 -18 10 29 -17 52 14 0.35 161 0 0 -18 28 29 23 7 15.4 13 111 60 -18 33 51 -18 23 7 -18 37 37 -18 19 21 0.35 162 0 0 -18 55 35 23 7 16.2 14 110 61 -19 0 58 -18 50 13 -19 4 44 -18 46 28 0.35 163 0 0 -19 22 41 23 7 17.1 15 110 61 -19 28 3 -19 17 18 -19 31 49 -19 13 33 0.35 164 0 0 -19 49 44 23 7 18.0 16 110 62 -19 55 6 -19 44 22 -19 58 52 -19 40 36 0.35 165 0 0 -20 16 44 23 7 19.1 17 109 63 -20 22 7 -20 11 22 -20 25 53 -20 7 36 0.35 166 0 0 -20 43 41 23 7 20.1 18 109 63 -20 49 4 -20 38 19 -20 52 50 -20 34 33 0.35 167 0 0 -21 10 34 23 7 21.2 19 108 64 -21 15 57 -21 5 12 -21 19 43 -21 1 26 0.35 168 0 0 -21 37 22 23 7 22.4 20 108 65 -21 42 45 -21 32 0 -21 46 31 -21 28 14 0.35 169 0 0 -22 4 4 23 7 23.7 21 108 65 -22 9 27 -21 58 42 -22 13 13 -21 54 56 0.35 170 0 0 -22 30 40 23 7 24.9 23 107 66 -22 36 3 -22 25 18 -22 39 49 -22 21 33 0.35 171 0 0 -22 57 10 23 7 26.3 24 107 66 -23 2 32 -22 51 48 -23 6 18 -22 48 2 0.35 172 0 0 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33 -27 36 27 0.37 - 30 0 0 -27 21 9 23 12 46.4 13 250 -39 -27 26 29 -27 15 50 -27 30 13 -27 12 6 0.37 - 29 0 0 -26 56 35 23 12 47.1 12 250 -40 -27 1 55 -26 51 15 -27 5 39 -26 47 31 0.37 - 28 0 0 -26 31 48 23 12 47.8 11 249 -41 -26 37 8 -26 26 28 -26 40 53 -26 22 43 0.38 - 27 0 0 -26 6 48 23 12 48.4 10 249 -42 -26 12 9 -26 1 28 -26 15 54 -25 57 43 0.38 - 26 0 0 -25 41 37 23 12 48.9 9 248 -43 -25 46 58 -25 36 16 -25 50 43 -25 32 32 0.38 - 25 0 0 -25 16 14 23 12 49.4 8 248 -44 -25 21 35 -25 10 53 -25 25 21 -25 7 8 0.39 - 24 0 0 -24 50 41 23 12 49.8 7 247 -45 -24 56 2 -24 45 20 -24 59 47 -24 41 35 0.40 - 23 0 0 -24 24 57 23 12 50.2 6 247 -46 -24 30 19 -24 19 36 -24 34 4 -24 15 51 0.40 - 22 0 0 -23 59 4 23 12 50.5 5 247 -47 -24 4 25 -23 53 42 -24 8 11 -23 49 57 0.42 - 21 0 0 -23 33 2 23 12 50.8 4 246 -48 -23 38 23 -23 27 40 -23 42 9 -23 23 55 0.44 - 20 0 0 -23 6 51 23 12 51.0 3 246 -49 -23 12 13 -23 1 29 -23 15 59 -22 57 44 0.47 - 19 0 0 -22 40 33 23 12 51.1 2 245 -50 -22 45 55 -22 35 11 -22 49 40 -22 31 25 0.53 - 18 0 0 -22 14 7 23 12 51.2 1 245 -51 -22 19 29 -22 8 45 -22 23 15 -22 5 0 0.78 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6809-00181-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 46 40.3765 DE: -23 23 17.555 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 46 40.3763 DE: -23 23 17.554 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7880) 1992 OM7 asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.12480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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", 0.003", 94.294° remarks: * orbital elements for (7880)1992 OM7 : Mean anomaly = 338.5439234440 deg Arg. of pericenter = 2.1788607133 deg Long. of node = 292.1169170079 deg Inclination = 3.2688054093 deg Eccentricity = 0.0441147420 Semimajor axis = 2.7843772205 AU Perihelion dist = 2.6615451378 AU Mag: H = 13.12, G = 0.15 Epoch of elements : MJD 60594.96528729 TDT (2024 Oct 11.9653) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,0.48,2024,10,11,23.166896,-0.027569,-0.322916,19.898635,-1.712363,0.004595,-0.000625,-0.000001,0.000000 -116.4930,-23.4332,-170.88,-7.49,False TYC 6809-00181-1,16.77788241,-23.3882097,11.66,11.17,10.91,0.0,0,,16.80251215,-23.4332450,7.48,7.30,0,0,0 7880,1992 OM7,18.65,16.893,3.1248,0,0,4.069,-4.82,,1.2,0 0,338.3392,2024,10,11,2.1789,292.1169,3.2688,0.04411,2.78438,2.66155,13.12,5.0,0.15 1.351,0.0113,0.0026,94,0.0026,Known errors,1.05,0,-1,-1 20241011_0181-1,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org