IOTA/IOTA-ES occultation update for (1233) Kobresia / TYC 6294-02444-1 event on 2024 Nov 15, 16:25 UT Visible from Summary ------- On 2024 Nov 15 UT, the 34.36 km diameter asteroid (1233) Kobresia will occult a 11.6 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 5.17 mag to 16.76 mag (the magnitude of the asteroid) for at most 0.900 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 Nov 15, 16:23 - 2024 Nov 15, 16:28 * geocentric midpoint of event [JD]: 2460630.18469775 * magnitude of target star: 11.60 * magnitude drop [mag]: 5.17 * estimated maximum duration [s]: 0.900 * Moon: 100 % sunlit, 128° distance * Sun: 50° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.003", 79°) * approx speed of asteroid's shadow [km/s]: 38.2393 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6294-02444-1 by 1233 Kobresia on 2024 Nov 15 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 -119 0 0 -30 14 28 16 23 25.8 0 115 44 -30 25 48 -30 3 9 -30 30 0 -29 58 58 .... -118 0 0 -30 39 11 16 23 25.9 1 115 45 -30 50 30 -30 27 53 -30 54 43 -30 23 42 0.41 -117 0 0 -31 3 43 16 23 26.0 2 114 46 -31 15 2 -30 52 25 -31 19 14 -30 48 14 0.43 -116 0 0 -31 28 3 16 23 26.1 3 114 46 -31 39 21 -31 16 46 -31 43 33 -31 12 35 0.44 -115 0 0 -31 52 10 16 23 26.3 4 113 47 -32 3 28 -31 40 54 -32 7 40 -31 36 43 0.44 -114 0 0 -32 16 5 16 23 26.6 5 113 48 -32 27 22 -32 4 49 -32 31 33 -32 0 38 0.44 -113 0 0 -32 39 46 16 23 26.9 6 112 49 -32 51 3 -32 28 31 -32 55 14 -32 24 21 0.44 -112 0 0 -33 3 14 16 23 27.2 7 112 50 -33 14 29 -32 51 59 -33 18 40 -32 47 49 0.45 -111 0 0 -33 26 27 16 23 27.6 8 111 50 -33 37 42 -33 15 13 -33 41 52 -33 11 3 0.45 -110 0 0 -33 49 25 16 23 28.0 9 110 51 -34 0 40 -33 38 12 -34 4 50 -33 34 3 0.45 -109 0 0 -34 12 9 16 23 28.5 10 110 52 -34 23 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57 -22 4 47 -21 33 45 0.47 63 0 0 -21 22 43 16 28 22.7 16 252 -30 -21 34 2 -21 11 25 -21 38 14 -21 7 13 0.48 64 0 0 -20 56 13 16 28 23.6 15 252 -31 -21 7 32 -20 44 56 -21 11 44 -20 40 44 0.48 65 0 0 -20 29 47 16 28 24.5 14 252 -32 -20 41 5 -20 18 30 -20 45 16 -20 14 19 0.48 66 0 0 -20 3 24 16 28 25.3 13 251 -33 -20 14 42 -19 52 8 -20 18 53 -19 47 58 0.48 67 0 0 -19 37 7 16 28 26.0 12 251 -34 -19 48 24 -19 25 52 -19 52 35 -19 21 41 0.48 68 0 0 -19 10 55 16 28 26.7 11 251 -35 -19 22 11 -18 59 41 -19 26 22 -18 55 31 0.49 69 0 0 -18 44 50 16 28 27.3 10 250 -36 -18 56 5 -18 33 36 -19 0 16 -18 29 26 0.49 70 0 0 -18 18 51 16 28 27.8 9 250 -37 -18 30 6 -18 7 38 -18 34 16 -18 3 29 0.50 71 0 0 -17 53 1 16 28 28.3 8 250 -38 -18 4 14 -17 41 48 -18 8 24 -17 37 39 0.50 72 0 0 -17 27 18 16 28 28.8 7 249 -39 -17 38 31 -17 16 7 -17 42 40 -17 11 58 0.51 73 0 0 -17 1 45 16 28 29.2 6 249 -40 -17 12 56 -16 50 34 -17 17 6 -16 46 26 0.52 74 0 0 -16 36 21 16 28 29.5 5 249 -41 -16 47 32 -16 25 11 -16 51 41 -16 21 3 0.53 75 0 0 -16 11 8 16 28 29.7 4 248 -42 -16 22 17 -15 59 59 -16 26 26 -15 55 51 0.55 76 0 0 -15 46 5 16 28 29.9 3 248 -43 -15 57 14 -15 34 58 -16 1 22 -15 30 50 0.59 77 0 0 -15 21 15 16 28 30.1 2 248 -44 -15 32 22 -15 10 8 -15 36 30 -15 6 1 0.67 78 0 0 -14 56 36 16 28 30.1 1 248 -45 -15 7 43 -14 45 31 -15 11 50 -14 41 24 1.00 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6294-02444-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 58 45.2695 DE: -21 54 38.161 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 58 45.2694 DE: -21 54 38.161 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.6 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1233) Kobresia asteroid class: approx. diameter [km]: 34 approx. diameter ["]: 0.016 distance from Earth [AU]: 2.95090 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): 0.009", 0.003", 78.701° remarks: * orbital elements for (1233)Kobresia : Mean anomaly = 33.4147268070 deg Arg. of pericenter = 333.2590344217 deg Long. of node = 291.3757671365 deg Inclination = 5.6011456532 deg Eccentricity = 0.0560743746 Semimajor axis = 2.5554969890 AU Perihelion dist = 2.4121990935 AU Mag: H = 11.54, G = 0.15 Epoch of elements : MJD 60629.68469755 TDT (2024 Nov 15.6847) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,0.90,2024,11,15,16.432746,0.059179,-0.404076,21.353133,3.143729,0.004354,0.000503,-0.000001,0.000000 -16.6830,-21.8778,-70.31,-18.72,False TYC 6294-02444-1,18.97924159,-21.9106001,11.98,11.60,11.39,0.0,0,,19.00376778,-21.8778401,5.16,4.92,0,0,0 1233,Kobresia,16.76,34.360,2.9509,0,0,4.572,9.38,,1.8,0 0,33.2495,2024,11,15,333.2590,291.3758,5.6011,0.05607,2.55550,2.41220,11.53,5.0,0.15 1.185,0.0090,0.0030,79,0.0030,Known errors,0.75,0,-1,-1 20241115_2444-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org