IOTA/IOTA-ES occultation update for (225) Henrietta / UCAC4 433-034139 event on 2023 Feb 12, 02:48 UT Visible from South America Summary ------- On 2023 Feb 12 UT, the 107.3 km diameter asteroid (225) Henrietta will occult a 11.9 mag star in the constellation Monoceros for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.47 mag to 15.30 mag (the magnitude of the asteroid) for at most 6.960 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: 2023 Feb 12, 02:41 - 2023 Feb 12, 02:55 * geocentric midpoint of event [JD]: 2459987.61721513 * magnitude of target star: 11.88 * magnitude drop [mag]: 3.47 * estimated maximum duration [s]: 6.960 * Moon: 66 % sunlit, 101° distance * Sun: 141° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 107 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.004", 101°) * approx speed of asteroid's shadow [km/s]: 15.4268 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 433-034139 by 225 Henrietta on 2023 Feb 12 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 ' " Longitude Longitude Longitude Longitude -159 30 27 34 0 0 2 55 39.8 3 96 15 -155 7 1 ... .. .. -154 22 11 ... .. .. .... -151 35 44 33 0 0 2 55 34.6 10 101 10 -148 43 21 -154 57 27 -148 11 4 -155 43 27 0.01 Latitude Latitude Latitude Latitude -151 0 0 32 54 12 2 55 34.0 10 101 9 33 23 46 32 24 37 33 29 44 32 18 38 0.01 -150 0 0 32 44 2 2 55 32.9 11 102 8 33 13 40 32 14 24 33 19 39 32 8 25 0.01 -149 0 0 32 33 21 2 55 31.6 12 102 8 33 3 2 32 3 39 33 9 2 31 57 39 0.01 -148 0 0 32 22 9 2 55 30.3 13 103 7 32 51 54 31 52 24 32 57 55 31 46 23 0.01 -147 0 0 32 10 26 2 55 28.9 14 103 6 32 40 15 31 40 36 32 46 16 31 34 35 0.01 -146 0 0 31 58 11 2 55 27.4 14 104 6 32 28 4 31 28 18 32 34 6 31 22 16 0.01 -145 0 0 31 45 25 2 55 25.8 15 104 5 32 15 22 31 15 28 32 21 25 31 9 25 0.01 -144 0 0 31 32 7 2 55 24.1 16 105 4 32 2 9 31 2 6 32 8 12 30 56 2 0.01 -143 0 0 31 18 18 2 55 22.3 17 105 3 31 48 24 30 48 12 31 54 28 30 42 7 0.01 -142 0 0 31 3 56 2 55 20.4 18 106 3 31 34 7 30 33 46 31 40 12 30 27 40 0.01 -141 0 0 30 49 3 2 55 18.4 19 106 2 31 19 18 30 18 48 31 25 25 30 12 41 0.01 -140 0 0 30 33 38 2 55 16.3 20 107 1 31 3 58 30 3 18 31 10 5 29 57 10 0.01 -139 0 0 30 17 40 2 55 14.0 21 107 0 30 48 5 29 47 15 30 54 13 29 41 6 0.01 -138 0 0 30 1 10 2 55 11.7 21 108 0 30 31 40 29 30 40 30 37 49 29 24 30 0.01 -137 0 0 29 44 7 2 55 9.3 22 108 -1 30 14 42 29 13 32 30 20 53 29 7 21 0.01 -136 0 0 29 26 32 2 55 6.7 23 109 -2 29 57 12 28 55 51 30 3 24 28 49 40 0.01 -135 0 0 29 8 24 2 55 4.1 24 109 -3 29 39 10 28 37 38 29 45 23 28 31 25 0.01 -134 0 0 28 49 43 2 55 1.3 25 110 -3 29 20 35 28 18 52 29 26 48 28 12 38 0.01 -133 0 0 28 30 30 2 54 58.4 26 110 -4 29 1 27 27 59 33 29 7 41 27 53 18 0.01 -132 0 0 28 10 43 2 54 55.5 27 111 -5 28 41 46 27 39 40 28 48 2 27 33 24 0.01 -131 0 0 27 50 23 2 54 52.3 28 111 -6 28 21 32 27 19 15 28 27 49 27 12 57 0.01 -130 0 0 27 29 30 2 54 49.1 29 111 -6 28 0 45 26 58 16 28 7 3 26 51 57 0.01 -129 0 0 27 8 4 2 54 45.8 30 112 -7 27 39 24 26 36 44 27 45 44 26 30 24 0.01 -128 0 0 26 46 5 2 54 42.3 31 112 -8 27 17 31 26 14 39 27 23 52 26 8 18 0.01 -127 0 0 26 23 32 2 54 38.7 32 113 -9 26 55 5 25 52 0 27 1 27 25 45 38 0.01 -126 0 0 26 0 26 2 54 35.0 33 113 -10 26 32 5 25 28 48 26 38 28 25 22 25 0.01 -125 0 0 25 36 47 2 54 31.2 34 114 -10 26 8 32 25 5 3 26 14 57 24 58 38 0.01 -124 0 0 25 12 35 2 54 27.3 35 114 -11 25 44 26 24 40 44 25 50 52 24 34 18 0.01 -123 0 0 24 47 49 2 54 23.2 36 114 -12 25 19 46 24 15 52 25 26 14 24 9 25 0.01 -122 0 0 24 22 31 2 54 19.0 37 115 -13 24 54 34 23 50 27 25 1 2 23 43 59 0.01 -121 0 0 23 56 39 2 54 14.7 38 115 -14 24 28 48 23 24 29 24 35 18 23 17 59 0.01 -120 0 0 23 30 14 2 54 10.2 39 116 -14 24 2 30 22 57 58 24 9 1 22 51 27 0.00 -119 0 0 23 3 16 2 54 5.7 40 116 -15 23 35 39 22 30 54 23 42 11 22 24 21 0.00 -118 0 0 22 35 46 2 54 1.0 41 116 -16 23 8 15 22 3 17 23 14 48 21 56 43 0.00 -117 0 0 22 7 43 2 53 56.1 42 117 -17 22 40 18 21 35 8 22 46 53 21 28 33 0.00 -116 0 0 21 39 8 2 53 51.2 43 117 -18 22 11 49 21 6 26 22 18 25 20 59 50 0.00 -115 0 0 21 10 0 2 53 46.1 44 117 -19 21 42 48 20 37 12 21 49 26 20 30 35 0.00 -114 0 0 20 40 21 2 53 40.9 45 118 -19 21 13 16 20 7 27 21 19 54 20 0 48 0.00 -113 0 0 20 10 11 2 53 35.5 46 118 -20 20 43 11 19 37 10 20 49 51 19 30 30 0.00 -112 0 0 19 39 29 2 53 30.0 47 118 -21 20 12 36 19 6 22 20 19 17 18 59 41 0.00 -111 0 0 19 8 16 2 53 24.4 48 119 -22 19 41 29 18 35 4 19 48 12 18 28 21 0.00 -110 0 0 18 36 33 2 53 18.7 49 119 -23 19 9 52 18 3 15 19 16 36 17 56 31 0.00 -109 0 0 18 4 21 2 53 12.8 50 119 -24 18 37 45 17 30 56 18 44 30 17 24 11 0.00 -108 0 0 17 31 38 2 53 6.9 51 120 -24 18 5 9 16 58 7 18 11 55 16 51 21 0.00 -107 0 0 16 58 27 2 53 0.7 52 120 -25 17 32 3 16 24 50 17 38 51 16 18 3 0.00 -106 0 0 16 24 47 2 52 54.5 53 120 -26 16 58 29 15 51 5 17 5 18 15 44 16 0.00 -105 0 0 15 50 39 2 52 48.1 54 120 -27 16 24 27 15 16 51 16 31 17 15 10 2 0.00 -104 0 0 15 16 4 2 52 41.7 55 121 -28 15 49 58 14 42 11 15 56 48 14 35 20 0.00 -103 0 0 14 41 3 2 52 35.1 57 121 -29 15 15 2 14 7 4 15 21 53 14 0 12 0.00 -102 0 0 14 5 36 2 52 28.3 58 121 -30 14 39 40 13 31 32 14 46 32 13 24 39 0.00 -101 0 0 13 29 43 2 52 21.5 59 121 -30 14 3 52 12 55 34 14 10 46 12 48 40 0.00 -100 0 0 12 53 26 2 52 14.5 60 121 -31 13 27 40 12 19 13 13 34 35 12 12 18 0.01 - 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9 0 0 -33 51 45 2 42 30.6 24 282 -35 -33 22 4 -34 21 26 -33 16 5 -34 27 26 0.01 - 8 0 0 -34 2 12 2 42 28.2 23 282 -35 -33 32 34 -34 31 49 -33 26 35 -34 37 48 0.01 - 7 0 0 -34 12 8 2 42 25.8 22 281 -34 -33 42 34 -34 41 42 -33 36 36 -34 47 40 0.01 - 6 0 0 -34 21 34 2 42 23.6 22 281 -34 -33 52 3 -34 51 5 -33 46 6 -34 57 3 0.01 - 5 0 0 -34 30 30 2 42 21.4 21 280 -33 -34 1 2 -34 59 58 -33 55 5 -35 5 55 0.01 - 4 0 0 -34 38 56 2 42 19.3 20 280 -32 -34 9 31 -35 8 21 -34 3 35 -35 14 18 0.01 - 3 0 0 -34 46 53 2 42 17.3 19 279 -32 -34 17 30 -35 16 15 -34 11 35 -35 22 11 0.01 - 2 0 0 -34 54 19 2 42 15.4 18 279 -31 -34 25 0 -35 23 39 -34 19 4 -35 29 34 0.01 - 1 0 0 -35 1 16 2 42 13.6 18 278 -31 -34 31 59 -35 30 33 -34 26 4 -35 36 28 0.01 0 0 0 -35 7 43 2 42 11.9 17 277 -30 -34 38 29 -35 36 58 -34 32 34 -35 42 53 0.01 1 0 0 -35 13 41 2 42 10.2 16 277 -29 -34 44 28 -35 42 54 -34 38 35 -35 48 48 0.01 2 0 0 -35 19 10 2 42 8.6 15 276 -29 -34 49 59 -35 48 21 -34 44 5 -35 54 14 0.01 3 0 0 -35 24 9 2 42 7.1 14 276 -28 -34 55 0 -35 53 18 -34 49 6 -35 59 11 0.01 4 0 0 -35 28 39 2 42 5.7 13 275 -27 -34 59 31 -35 57 46 -34 53 38 -36 3 39 0.01 5 0 0 -35 32 39 2 42 4.4 13 275 -27 -35 3 33 -36 1 45 -34 57 40 -36 7 38 0.01 6 0 0 -35 36 10 2 42 3.2 12 274 -26 -35 7 6 -36 5 15 -35 1 13 -36 11 8 0.01 7 0 0 -35 39 13 2 42 2.0 11 273 -25 -35 10 9 -36 8 16 -35 4 17 -36 14 9 0.01 8 0 0 -35 41 45 2 42 0.9 10 273 -25 -35 12 43 -36 10 48 -35 6 51 -36 16 40 0.01 9 0 0 -35 43 49 2 42 0.0 9 272 -24 -35 14 47 -36 12 51 -35 8 55 -36 18 43 0.01 10 0 0 -35 45 24 2 41 59.0 9 272 -24 -35 16 22 -36 14 26 -35 10 31 -36 20 17 0.01 11 0 0 -35 46 30 2 41 58.2 8 271 -23 -35 17 28 -36 15 31 -35 11 37 -36 21 22 0.01 12 0 0 -35 47 6 2 41 57.5 7 271 -22 -35 18 5 -36 16 7 -35 12 13 -36 21 58 0.01 13 0 0 -35 47 13 2 41 56.8 6 270 -22 -35 18 12 -36 16 14 -35 12 21 -36 22 6 0.01 14 0 0 -35 46 51 2 41 56.2 5 269 -21 -35 17 50 -36 15 52 -35 11 59 -36 21 44 0.01 15 0 0 -35 46 0 2 41 55.7 5 269 -20 -35 16 59 -36 15 1 -35 11 7 -36 20 53 0.01 16 0 0 -35 44 40 2 41 55.3 4 268 -20 -35 15 38 -36 13 41 -35 9 46 -36 19 33 0.01 17 0 0 -35 42 50 2 41 55.0 3 268 -19 -35 13 47 -36 11 52 -35 7 55 -36 17 44 0.02 18 0 0 -35 40 31 2 41 54.7 2 267 -18 -35 11 27 -36 9 34 -35 5 35 -36 15 26 0.02 19 0 0 -35 37 42 2 41 54.5 1 266 -18 -35 8 38 -36 6 46 -35 2 45 -36 12 38 0.03 20 0 0 -35 34 24 2 41 54.4 0 266 -17 -35 5 18 -36 3 29 -34 59 26 -36 9 22 0.07 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 13.0 Data for the target star ------------------------ * name: UCAC4 433-034139 * constellation : Monoceros * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 20 10.3879 DE: -03 35 02.627 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 20 10.3879 DE: -03 35 02.627 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (225) Henrietta asteroid class: approx. diameter [km]: 107 approx. diameter ["]: 0.043 distance from Earth [AU]: 3.47080 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#123 date of fit: 2022 Nov 22 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): 0.007", 0.004", 100.952° remarks: * orbital elements for (225)Henrietta : Mean anomaly = 176.3116675315 deg Arg. of pericenter = 103.8546630502 deg Long. of node = 197.0313437797 deg Inclination = 20.8527383213 deg Eccentricity = 0.2625059928 Semimajor axis = 3.3937728186 AU Perihelion dist = 2.5028871156 AU Mag: H = 8.86, G = 0.15 Epoch of elements : MJD 59987.11708333 TDT (2023 Feb 12.1171) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1232022Nov22,6.96,2023,2,12,2.813163,-0.006344,-0.009074,-7.149380,4.970328,0.003381,0.001770,0.000001,0.000000 -73.7649,-3.6282,141.35,-13.81,False UCAC4 433-034139,7.33621888,-3.5840629,0.00,11.88,0.00,0.0,0,,7.35561480,-3.6281608,3.46,0.00,0,0,0 225,Henrietta,15.30,107.3,3.4708,0,0,-1.210,12.59,,5.4,0 0,176.2932,2023,2,12,103.8547,197.0313,20.8527,0.26251,3.39377,2.50289,8.86,5.0,0.15 1.101,0.0067,0.0037,101,0.0043,Known errors,-1.00,-1,-1,-1 20230212_034139,59926.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 13, 00:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org