IOTA/IOTA-ES occultation update for (11569) Virgilsmith / TYC 4801-03159-1 event on 2024 Jan 07, 08:27 UT Visible from Summary ------- On 2024 Jan 07 UT, the 26.8248731052795 km diameter asteroid (11569) Virgilsmith will occult a 11.2 mag star in the constellation Monoceros for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.44 mag to 17.60 mag (the magnitude of the asteroid) for at most 1.670 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 Jan 07, 08:20 - 2024 Jan 07, 08:34 * geocentric midpoint of event [JD]: 2460316.85243550 * magnitude of target star: 11.16 * magnitude drop [mag]: 6.44 * estimated maximum duration [s]: 1.670 * Moon: 20 % sunlit, 122° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 90°) * approx speed of asteroid's shadow [km/s]: 16.1732 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4801-03159-1 by 11569 Virgilsmith on 2024 Jan 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 141 0 0 0 56 4 8 33 57.4 1 91 2 1 3 32 0 48 36 1 8 24 0 43 44 .... 142 0 0 0 55 5 8 33 57.2 2 91 1 1 2 33 0 47 37 1 7 26 0 42 45 0.15 143 0 0 0 53 53 8 33 56.9 3 91 0 1 1 21 0 46 25 1 6 13 0 41 33 0.16 144 0 0 0 52 28 8 33 56.5 4 91 -1 0 59 56 0 45 0 1 4 48 0 40 7 0.17 145 0 0 0 50 49 8 33 56.0 5 91 -2 0 58 17 0 43 21 1 3 10 0 38 28 0.18 146 0 0 0 48 57 8 33 55.3 6 91 -3 0 56 26 0 41 29 1 1 18 0 36 37 0.18 147 0 0 0 46 53 8 33 54.5 7 91 -4 0 54 21 0 39 24 0 59 13 0 34 32 0.18 148 0 0 0 44 35 8 33 53.6 8 91 -5 0 52 3 0 37 6 0 56 55 0 32 13 0.18 149 0 0 0 42 4 8 33 52.6 9 91 -6 0 49 32 0 34 35 0 54 24 0 29 42 0.19 150 0 0 0 39 20 8 33 51.5 10 91 -7 0 46 48 0 31 51 0 51 40 0 26 58 0.19 151 0 0 0 36 23 8 33 50.2 11 91 -8 0 43 51 0 28 54 0 48 44 0 24 1 0.19 152 0 0 0 33 13 8 33 48.9 12 91 -8 0 40 42 0 25 44 0 45 34 0 20 51 0.19 153 0 0 0 29 51 8 33 47.4 13 91 -9 0 37 19 0 22 22 0 42 12 0 17 29 0.19 154 0 0 0 26 15 8 33 45.7 14 91 -10 0 33 44 0 18 47 0 38 37 0 13 54 0.19 155 0 0 0 22 28 8 33 44.0 15 91 -11 0 29 57 0 14 59 0 34 49 0 10 6 0.19 156 0 0 0 18 27 8 33 42.2 16 91 -12 0 25 56 0 10 58 0 30 49 0 6 5 0.19 157 0 0 0 14 15 8 33 40.2 17 91 -13 0 21 44 0 6 45 0 26 36 0 1 52 0.19 158 0 0 0 9 50 8 33 38.1 18 91 -14 0 17 19 0 2 20 0 22 11 - 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48 0 0 -23 4 12 8 21 10.4 11 274 -3 -22 56 44 -23 11 40 -22 51 52 -23 16 32 0.20 - 47 0 0 -23 5 47 8 21 9.3 10 273 -3 -22 58 20 -23 13 15 -22 53 28 -23 18 8 0.20 - 46 0 0 -23 7 11 8 21 8.3 9 273 -2 -22 59 43 -23 14 39 -22 54 51 -23 19 31 0.21 - 45 0 0 -23 8 22 8 21 7.3 8 273 -1 -23 0 54 -23 15 50 -22 56 2 -23 20 42 0.21 - 44 0 0 -23 9 21 8 21 6.5 7 272 0 -23 1 53 -23 16 49 -22 57 2 -23 21 41 0.21 - 43 0 0 -23 10 8 8 21 5.8 6 272 1 -23 2 40 -23 17 36 -22 57 48 -23 22 28 0.21 - 42 0 0 -23 10 43 8 21 5.1 5 272 2 -23 3 15 -23 18 10 -22 58 23 -23 23 3 0.21 - 41 0 0 -23 11 5 8 21 4.6 4 271 2 -23 3 37 -23 18 33 -22 58 46 -23 23 25 0.22 - 40 0 0 -23 11 15 8 21 4.2 3 271 3 -23 3 48 -23 18 43 -22 58 56 -23 23 35 0.22 - 39 0 0 -23 11 13 8 21 3.8 2 270 4 -23 3 46 -23 18 41 -22 58 54 -23 23 33 0.23 - 38 0 0 -23 10 59 8 21 3.6 1 270 5 -23 3 31 -23 18 27 -22 58 40 -23 23 19 0.26 - 37 0 0 -23 10 32 8 21 3.5 1 270 6 -23 3 5 -23 18 0 -22 58 13 -23 22 52 0.36 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 4801-03159-1 * constellation : Monoceros * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 58 48.1441 DE: -00 36 20.188 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 58 48.1440 DE: -00 36 20.194 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.2 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11569) Virgilsmith asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.69040 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 27 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): 0.017", 0.003", 90.38° remarks: * orbital elements for (11569)Virgilsmith : Mean anomaly = 192.3227449239 deg Arg. of pericenter = 101.2580375791 deg Long. of node = 174.9667590481 deg Inclination = 18.2211090302 deg Eccentricity = 0.1703262658 Semimajor axis = 3.0964197451 AU Perihelion dist = 2.5690181326 AU Mag: H = 12.18, G = 0.15 Epoch of elements : MJD 60316.35243579 TDT (2024 Jan 07.3524) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr27,1.67,2024,1,7,8.458452,-0.039959,-0.187366,-8.929664,1.895280,0.000261,0.002403,0.000002,0.000000 -128.2780,-0.6382,54.62,-22.42,False TYC 4801-03159-1,6.98004001,-0.6056076,11.89,11.16,10.77,0.1,0,,7.00074999,-0.6382232,6.44,6.39,0,0,0 11569,Virgilsmith,17.60,27.020,2.6904,0,0,-1.945,6.19,,1.8,0 0,192.2590,2024,1,7,101.2580,174.9668,18.2211,0.17033,3.09642,2.56902,12.18,5.0,0.15 1.326,0.0170,0.0030,90,0.0045,Known errors,0.86,0,-1,-1 20240107_3159-1,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org