IOTA/IOTA-ES occultation update for (295) Theresia / UCAC4 359-067951 event on 2024 Feb 13, 01:43 UT Visible from Summary ------- On 2024 Feb 13 UT, the 28.484 km diameter asteroid (295) Theresia will occult a 10.5 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 5.10 mag to 15.63 mag (the magnitude of the asteroid) for at most 3.180 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: 100 * date and approx. time of event: 2024 Feb 13, 01:31 - 2024 Feb 13, 01:55 * geocentric midpoint of event [JD]: 2460353.57203750 * magnitude of target star: 10.54 * magnitude drop [mag]: 5.10 * estimated maximum duration [s]: 3.180 * Moon: 14 % sunlit, 144° distance * Sun: 101° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.001", 106°) * approx speed of asteroid's shadow [km/s]: 8.9705 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 359-067951 by 295 Theresia on 2024 Feb 13 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 - 26 0 0 26 36 57 1 31 56.6 0 111 -76 26 28 41 26 45 13 26 27 4 26 46 49 .... - 25 0 0 26 16 6 1 31 56.8 1 111 -76 26 7 48 26 24 23 26 6 12 26 26 0 0.05 - 24 0 0 25 54 45 1 31 57.2 2 112 -77 25 46 27 26 3 4 25 44 50 26 4 41 0.01 - 23 0 0 25 32 55 1 31 57.8 3 112 -78 25 24 35 25 41 16 25 22 58 25 42 53 -0.01 - 22 0 0 25 10 36 1 31 58.6 4 113 -78 25 2 15 25 18 58 25 0 37 25 20 35 -0.02 - 21 0 0 24 47 47 1 31 59.6 5 113 -79 24 39 24 24 56 10 24 37 47 24 57 48 -0.02 - 20 0 0 24 24 29 1 32 0.8 6 113 -79 24 16 5 24 32 53 24 14 27 24 34 31 -0.03 - 19 0 0 24 0 41 1 32 2.3 7 114 -80 23 52 15 24 9 7 23 50 37 24 10 45 -0.03 - 18 0 0 23 36 24 1 32 4.0 8 114 -80 23 27 57 23 44 51 23 26 19 23 46 30 -0.03 - 17 0 0 23 11 38 1 32 5.9 9 115 -80 23 3 9 23 20 6 23 1 31 23 21 45 -0.03 - 16 0 0 22 46 22 1 32 8.0 10 115 -80 22 37 53 22 54 52 22 36 14 22 56 31 -0.03 - 15 0 0 22 20 38 1 32 10.4 11 115 -80 22 12 7 22 29 9 22 10 28 22 30 49 -0.03 - 14 0 0 21 54 25 1 32 13.1 12 116 -80 21 45 52 22 2 58 21 44 13 22 4 37 -0.03 - 13 0 0 21 27 43 1 32 16.0 13 116 -80 21 19 9 21 36 17 21 17 29 21 37 57 -0.04 - 12 0 0 21 0 33 1 32 19.1 14 117 -80 20 51 57 21 9 9 20 50 17 21 10 49 -0.04 - 11 0 0 20 32 55 1 32 22.5 16 117 -79 20 24 18 20 41 32 20 22 37 20 43 12 -0.04 - 10 0 0 20 4 49 1 32 26.1 17 117 -79 19 56 10 20 13 27 19 54 30 20 15 8 -0.04 - 9 0 0 19 36 15 1 32 30.0 18 118 -78 19 27 35 19 44 55 19 25 54 19 46 35 -0.04 - 8 0 0 19 7 14 1 32 34.2 19 118 -78 18 58 33 19 15 55 18 56 52 19 17 36 -0.04 - 7 0 0 18 37 46 1 32 38.6 20 118 -77 18 29 4 18 46 29 18 27 22 18 48 10 -0.04 - 6 0 0 18 7 52 1 32 43.3 21 119 -76 17 59 8 18 16 36 17 57 26 18 18 17 -0.04 - 5 0 0 17 37 32 1 32 48.3 22 119 -75 17 28 47 17 46 17 17 27 5 17 47 59 -0.04 - 4 0 0 17 6 46 1 32 53.5 23 119 -74 16 58 0 17 15 32 16 56 17 17 17 15 -0.04 - 3 0 0 16 35 35 1 32 59.0 24 120 -74 16 26 48 16 44 23 16 25 5 16 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15 1 55 24.7 10 254 69 -22 30 16 -22 14 14 -22 31 50 -22 12 40 -0.05 136 0 0 -22 6 26 1 55 26.6 9 254 70 -22 14 29 -21 58 24 -22 16 2 -21 56 50 -0.05 137 0 0 -21 50 8 1 55 28.3 8 253 71 -21 58 12 -21 42 5 -21 59 45 -21 40 31 -0.05 138 0 0 -21 33 21 1 55 29.8 7 253 72 -21 41 25 -21 25 16 -21 42 59 -21 23 42 -0.04 139 0 0 -21 16 4 1 55 31.1 6 252 73 -21 24 10 -21 7 59 -21 25 44 -21 6 24 -0.04 140 0 0 -20 58 19 1 55 32.2 5 252 74 -21 6 26 -20 50 12 -21 8 0 -20 48 38 -0.04 141 0 0 -20 40 4 1 55 33.1 4 252 75 -20 48 12 -20 31 57 -20 49 47 -20 30 22 -0.03 142 0 0 -20 21 21 1 55 33.8 3 251 76 -20 29 30 -20 13 12 -20 31 5 -20 11 37 -0.02 143 0 0 -20 2 9 1 55 34.3 2 251 77 -20 10 19 -19 53 59 -20 11 55 -19 52 24 0.00 144 0 0 -19 42 29 1 55 34.6 1 251 78 -19 50 40 -19 34 17 -19 52 16 -19 32 42 0.07 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 359-067951 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 36 36.8982 DE: -18 19 54.331 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 36 36.8987 DE: -18 19 54.333 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.5 * B mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (295) Theresia asteroid class: approx. diameter [km]: 28 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.77820 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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", 0.001", 106.283° remarks: * orbital elements for (295)Theresia : Mean anomaly = 126.4485836498 deg Arg. of pericenter = 148.4828172254 deg Long. of node = 275.8644071280 deg Inclination = 2.6997296599 deg Eccentricity = 0.1674516008 Semimajor axis = 2.7983105303 AU Perihelion dist = 2.3297289524 AU Mag: H = 10.00, G = 0.15 Epoch of elements : MJD 60353.07203737 TDT (2024 Feb 13.0720) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,3.18,2024,2,13,1.728900,0.026154,0.062272,4.614067,-2.084778,-0.005595,0.001869,0.000000,0.000000 50.9515,-18.4369,157.62,-13.57,False UCAC4 359-067951,14.61024949,-18.3317583,10.87,10.54,10.36,0.0,0,,14.63269295,-18.4369059,5.10,4.83,0,0,0 295,Theresia,15.63,28.484,2.7782,0,0,1.026,-6.60,,2.0,0 0,126.2229,2024,2,12,148.4828,275.8644,2.6997,0.16745,2.79831,2.32973,10.00,5.0,0.15 1.097,0.0090,0.0006,106,0.0014,Known errors,1.62,0,-1,-1 20240213_067951,60138.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 04:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org