IOTA/IOTA-ES occultation update for (712) Boliviana / UCAC4 340-073591 event on 2024 Feb 03, 00:59 UT Visible from Summary ------- On 2024 Feb 03 UT, the 117.876 km diameter asteroid (712) Boliviana will occult a 11.7 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 2.80 mag to 14.41 mag (the magnitude of the asteroid) for at most 6.150 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 03, 00:54 - 2024 Feb 03, 01:04 * geocentric midpoint of event [JD]: 2460343.54149617 * magnitude of target star: 11.70 * magnitude drop [mag]: 2.80 * estimated maximum duration [s]: 6.150 * Moon: 49 % sunlit, 8° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 132 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.001", 94°) * approx speed of asteroid's shadow [km/s]: 19.1747 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-073591 by 712 Boliviana on 2024 Feb 3 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 - 13 0 0 -16 5 14 0 54 49.3 1 113 -57 -16 44 39 -15 26 5 -16 46 29 -15 24 17 .... - 12 0 0 -16 30 17 0 54 49.4 2 113 -57 -17 9 46 -15 51 3 -17 11 36 -15 49 14 0.45 - 11 0 0 -16 55 35 0 54 49.7 3 112 -56 -17 35 9 -16 16 16 -17 36 59 -16 14 27 0.48 - 10 0 0 -17 21 8 0 54 50.1 4 112 -56 -18 0 47 -16 41 45 -18 2 38 -16 39 56 0.49 - 9 0 0 -17 46 56 0 54 50.6 5 112 -56 -18 26 40 -17 7 28 -18 28 31 -17 5 39 0.50 - 8 0 0 -18 12 58 0 54 51.2 6 111 -55 -18 52 46 -17 33 26 -18 54 37 -17 31 36 0.50 - 7 0 0 -18 39 13 0 54 51.9 7 111 -55 -19 19 6 -17 59 36 -19 20 57 -17 57 47 0.51 - 6 0 0 -19 5 41 0 54 52.8 8 111 -54 -19 45 38 -18 26 0 -19 47 29 -18 24 10 0.51 - 5 0 0 -19 32 21 0 54 53.8 9 110 -53 -20 12 22 -18 52 35 -20 14 14 -18 50 45 0.51 - 4 0 0 -19 59 11 0 54 54.9 10 110 -53 -20 39 17 -19 19 22 -20 41 9 -19 17 32 0.51 - 3 0 0 -20 26 13 0 54 56.2 11 110 -52 -21 6 22 -19 46 19 -21 8 14 -19 44 29 0.51 - 2 0 0 -20 53 23 0 54 57.6 12 109 -52 -21 33 37 -20 13 26 -21 35 29 -20 11 36 0.52 - 1 0 0 -21 20 43 0 54 59.0 13 109 -51 -22 1 0 -20 40 42 -22 2 53 -20 38 51 0.52 - 0 0 0 -21 48 11 0 55 0.6 14 109 -50 -22 28 32 -21 8 7 -22 30 24 -21 6 16 0.52 1 0 0 -22 15 46 0 55 2.4 15 108 -50 -22 56 10 -21 35 38 -22 58 3 -21 33 47 0.52 2 0 0 -22 43 28 0 55 4.2 16 108 -49 -23 23 55 -22 3 17 -23 25 48 -22 1 26 0.52 3 0 0 -23 11 15 0 55 6.1 17 107 -48 -23 51 46 -22 31 1 -23 53 39 -22 29 10 0.52 4 0 0 -23 39 8 0 55 8.2 18 107 -47 -24 19 41 -22 58 51 -24 21 34 -22 56 59 0.52 5 0 0 -24 7 4 0 55 10.4 19 106 -47 -24 47 41 -23 26 45 -24 49 34 -23 24 53 0.52 6 0 0 -24 35 4 0 55 12.6 20 106 -46 -25 15 43 -23 54 42 -25 17 37 -23 52 50 0.52 7 0 0 -25 3 7 0 55 15.0 21 105 -45 -25 43 48 -24 22 42 -25 45 42 -24 20 50 0.52 8 0 0 -25 31 11 0 55 17.5 22 105 -44 -26 11 54 -24 50 44 -26 13 48 -24 48 52 0.52 9 0 0 -25 59 16 0 55 20.1 23 104 -43 -26 40 1 -25 18 47 -26 41 55 -25 16 55 0.52 10 0 0 -26 27 21 0 55 22.8 24 104 -43 -27 8 8 -25 46 50 -27 10 2 -25 44 58 0.52 11 0 0 -26 55 25 0 55 25.5 25 103 -42 -27 36 14 -26 14 53 -27 38 8 -26 13 1 0.52 12 0 0 -27 23 28 0 55 28.4 26 103 -41 -28 4 18 -26 42 54 -28 6 12 -26 41 2 0.52 13 0 0 -27 51 28 0 55 31.4 27 102 -40 -28 32 19 -27 10 53 -28 34 13 -27 9 1 0.52 14 0 0 -28 19 25 0 55 34.5 28 101 -39 -29 0 17 -27 38 49 -29 2 11 -27 36 57 0.52 15 0 0 -28 47 17 0 55 37.6 29 101 -38 -29 28 10 -28 6 41 -29 30 4 -28 4 49 0.52 16 0 0 -29 15 5 0 55 40.8 30 100 -37 -29 55 58 -28 34 29 -29 57 53 -28 32 36 0.52 17 0 0 -29 42 48 0 55 44.1 31 99 -37 -30 23 41 -29 2 11 -30 25 35 -29 0 18 0.52 18 0 0 -30 10 23 0 55 47.5 32 99 -36 -30 51 17 -29 29 47 -30 53 11 -29 27 54 0.52 19 0 0 -30 37 52 0 55 51.0 33 98 -35 -31 18 45 -29 57 16 -31 20 39 -29 55 23 0.52 20 0 0 -31 5 13 0 55 54.5 34 97 -34 -31 46 6 -30 24 37 -31 48 0 -30 22 44 0.52 21 0 0 -31 32 25 0 55 58.1 35 97 -33 -32 13 17 -30 51 50 -32 15 11 -30 49 57 0.52 22 0 0 -31 59 28 0 56 1.8 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39 18 -34 14 40 0.80 -174 0 0 -34 31 33 1 4 40.8 1 243 66 -35 12 9 -33 51 13 -35 14 3 -33 49 21 1.24 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 340-073591 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 16 42.9808 DE: -22 04 14.586 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 16 42.9808 DE: -22 04 14.587 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (712) Boliviana asteroid class: approx. diameter [km]: 118 approx. diameter ["]: 0.054 distance from Earth [AU]: 3.01430 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#142 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): 0.006", 0.001", 93.872° remarks: * orbital elements for (712)Boliviana : Mean anomaly = 153.2094502854 deg Arg. of pericenter = 181.5793402786 deg Long. of node = 230.6882909720 deg Inclination = 12.7562672862 deg Eccentricity = 0.1850924293 Semimajor axis = 2.5768127994 AU Perihelion dist = 2.0998642586 AU Mag: H = 8.65, G = 0.03 Epoch of elements : MJD 60343.04149612 TDT (2024 Feb 03.0415) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1422023Apr24,6.15,2024,2,3,0.995908,-0.079527,-0.449087,10.656074,-1.891875,-0.005719,0.001466,0.000000,0.000000 81.8689,-22.1590,168.48,-16.72,False UCAC4 340-073591,15.27860574,-22.0707183,12.24,11.70,11.41,0.0,0,,15.30174929,-22.1589518,2.79,2.65,0,0,0 712,Boliviana,14.41,117.876,3.0143,0,0,2.238,-5.52,,6.6,0 0,152.9613,2024,2,2,181.5793,230.6883,12.7563,0.18509,2.57681,2.09986,8.65,5.0,0.15 1.023,0.0060,0.0011,94,0.0012,Known errors,0.99,0,-1,-1 20240203_073591,60138.15 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org