IOTA/IOTA-ES occultation update for (3089) Oujianquan / TYC 5031-00731-1 event on 2024 Feb 07, 00:38 UT Visible from Summary ------- On 2024 Feb 07 UT, the 35.58 km diameter asteroid (3089) Oujianquan will occult a 10.3 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.23 mag to 16.53 mag (the magnitude of the asteroid) for at most 1.440 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 Feb 07, 00:34 - 2024 Feb 07, 00:42 * geocentric midpoint of event [JD]: 2460347.52682196 * magnitude of target star: 10.30 * magnitude drop [mag]: 6.23 * estimated maximum duration [s]: 1.440 * Moon: 12 % sunlit, 43° distance * Sun: 79° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 36 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 117°) * approx speed of asteroid's shadow [km/s]: 24.7641 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5031-00731-1 by 3089 Oujianquan on 2024 Feb 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 5 0 0 - 2 49 30 0 34 24.6 1 97 -69 - 2 59 25 - 2 39 36 - 3 6 33 - 2 32 29 .... 6 0 0 - 2 57 6 0 34 24.7 2 97 -69 - 3 7 0 - 2 47 11 - 3 14 8 - 2 40 4 0.17 7 0 0 - 3 4 50 0 34 24.8 3 97 -68 - 3 14 45 - 2 54 55 - 3 21 53 - 2 47 48 0.18 8 0 0 - 3 12 43 0 34 25.1 4 97 -67 - 3 22 39 - 3 2 48 - 3 29 47 - 2 55 41 0.18 9 0 0 - 3 20 46 0 34 25.4 5 97 -67 - 3 30 41 - 3 10 51 - 3 37 49 - 3 3 43 0.18 10 0 0 - 3 28 57 0 34 25.9 6 97 -66 - 3 38 53 - 3 19 1 - 3 46 1 - 3 11 54 0.19 11 0 0 - 3 37 17 0 34 26.4 7 97 -65 - 3 47 13 - 3 27 21 - 3 54 21 - 3 20 13 0.19 12 0 0 - 3 45 45 0 34 27.0 8 97 -64 - 3 55 41 - 3 35 49 - 4 2 50 - 3 28 41 0.19 13 0 0 - 3 54 22 0 34 27.6 9 96 -64 - 4 4 18 - 3 44 26 - 4 11 27 - 3 37 18 0.19 14 0 0 - 4 3 7 0 34 28.4 10 96 -63 - 4 13 3 - 3 53 10 - 4 20 12 - 3 46 2 0.19 15 0 0 - 4 12 0 0 34 29.2 11 96 -62 - 4 21 56 - 4 2 3 - 4 29 5 - 3 54 55 0.19 16 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58 40 -19 38 54 -20 5 46 -19 31 48 0.21 178 0 0 -19 42 30 0 42 48.6 7 265 83 -19 52 24 -19 32 37 -19 59 30 -19 25 32 0.21 179 0 0 -19 36 5 0 42 49.1 6 265 83 -19 45 58 -19 26 11 -19 53 5 -19 19 5 0.22 180 0 0 -19 29 29 0 42 49.5 5 264 82 -19 39 23 -19 19 36 -19 46 30 -19 12 30 0.22 -179 0 0 -19 22 45 0 42 49.8 4 264 81 -19 32 39 -19 12 51 -19 39 46 -19 5 45 0.23 -178 0 0 -19 15 51 0 42 50.1 3 264 80 -19 25 45 -19 5 58 -19 32 52 -18 58 51 0.24 -177 0 0 -19 8 49 0 42 50.2 2 263 80 -19 18 43 -18 58 55 -19 25 50 -18 51 48 0.27 -176 0 0 -19 1 37 0 42 50.3 1 263 79 -19 11 32 -18 51 43 -19 18 39 -18 44 36 0.36 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: TYC 5031-00731-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 58 07.5945 DE: -06 54 29.719 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 58 07.5946 DE: -06 54 29.720 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.3 * B mag [mag]: 10.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3089) Oujianquan asteroid class: approx. diameter [km]: 36 approx. diameter ["]: 0.019 distance from Earth [AU]: 2.57400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.020", 0.002", 117.411° remarks: * orbital elements for (3089)Oujianquan : Mean anomaly = 319.3203810785 deg Arg. of pericenter = 183.9801336100 deg Long. of node = 88.2006071259 deg Inclination = 16.6932170829 deg Eccentricity = 0.1855467808 Semimajor axis = 2.9312874912 AU Perihelion dist = 2.3873965336 AU Mag: H = 11.36, G = 0.15 Epoch of elements : MJD 60347.02682200 TDT (2024 Feb 07.0268) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.44,2024,2,7,0.643727,-0.026751,-0.186161,13.837978,-1.970280,-0.005572,0.001452,0.000000,0.000000 93.5490,-6.9788,173.86,-15.52,False TYC 5031-00731-1,15.96877622,-6.9082552,10.58,10.30,10.15,0.0,0,,15.99012322,-6.9788146,6.23,5.94,0,0,0 3089,Oujianquan,16.53,35.580,2.5740,0,0,3.176,-6.73,,2.4,0 0,319.1187,2024,2,6,183.9801,88.2006,16.6932,0.18555,2.93129,2.38740,11.36,5.0,0.15 1.359,0.0200,0.0019,117,0.0069,Known errors,1.23,0,-1,-1 20240207_0731-1,60138.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org