IOTA/IOTA-ES occultation update for (1894) Haffner / UCAC4 362-195990 event on 2024 Dec 04, 19:26 UT Visible from Summary ------- On 2024 Dec 04 UT, the 10.678 km diameter asteroid (1894) Haffner will occult a 11.8 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.96 mag to 17.73 mag (the magnitude of the asteroid) for at most 0.300 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: 90 * date and approx. time of event: 2024 Dec 04, 19:23 - 2024 Dec 04, 19:29 * geocentric midpoint of event [JD]: 2460649.30988396 * magnitude of target star: 11.77 * magnitude drop [mag]: 5.96 * estimated maximum duration [s]: 0.300 * Moon: 12 % sunlit, 14° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 73°) * approx speed of asteroid's shadow [km/s]: 35.0308 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 362-195990 by 1894 Haffner on 2024 Dec 4 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 -151 0 0 -18 37 33 19 23 12.7 0 109 54 -18 40 37 -18 34 29 -18 43 46 -18 31 20 .... -150 0 0 -18 56 41 19 23 12.8 1 108 55 -18 59 45 -18 53 37 -19 2 53 -18 50 29 0.15 -149 0 0 -19 15 31 19 23 12.9 2 108 56 -19 18 35 -19 12 28 -19 21 43 -19 9 20 0.12 -148 0 0 -19 34 4 19 23 13.0 3 108 57 -19 37 7 -19 31 0 -19 40 15 -19 27 53 0.11 -147 0 0 -19 52 17 19 23 13.2 4 107 58 -19 55 20 -19 49 15 -19 58 28 -19 46 7 0.10 -146 0 0 -20 10 13 19 23 13.5 5 107 59 -20 13 16 -20 7 10 -20 16 23 -20 4 3 0.10 -145 0 0 -20 27 50 19 23 13.8 6 107 60 -20 30 52 -20 24 47 -20 33 59 -20 21 40 0.10 -144 0 0 -20 45 7 19 23 14.1 7 106 61 -20 48 10 -20 42 5 -20 51 16 -20 38 59 0.10 -143 0 0 -21 2 6 19 23 14.6 8 106 62 -21 5 8 -20 59 4 -21 8 14 -20 55 58 0.10 -142 0 0 -21 18 45 19 23 15.0 9 106 63 -21 21 47 -21 15 44 -21 24 53 -21 12 38 0.09 -141 0 0 -21 35 5 19 23 15.5 10 105 64 -21 38 6 -21 32 4 -21 41 12 -21 28 58 0.09 -140 0 0 -21 51 5 19 23 16.1 11 105 65 -21 54 6 -21 48 4 -21 57 12 -21 44 58 0.09 -139 0 0 -22 6 45 19 23 16.7 12 104 66 -22 9 46 -22 3 44 -22 12 51 -22 0 39 0.09 -138 0 0 -22 22 5 19 23 17.4 13 104 67 -22 25 5 -22 19 4 -22 28 10 -22 15 59 0.09 -137 0 0 -22 37 4 19 23 18.1 14 104 68 -22 40 5 -22 34 4 -22 43 10 -22 30 59 0.09 -136 0 0 -22 51 44 19 23 18.8 15 103 69 -22 54 44 -22 48 44 -22 57 48 -22 45 39 0.09 -135 0 0 -23 6 2 19 23 19.6 16 103 70 -23 9 2 -23 3 3 -23 12 7 -22 59 58 0.09 -134 0 0 -23 20 1 19 23 20.5 17 102 71 -23 23 0 -23 17 1 -23 26 4 -23 13 57 0.09 -133 0 0 -23 33 38 19 23 21.4 18 102 72 -23 36 37 -23 30 39 -23 39 41 -23 27 35 0.09 -132 0 0 -23 46 55 19 23 22.3 19 102 73 -23 49 54 -23 43 56 -23 52 57 -23 40 52 0.09 -131 0 0 -23 59 50 19 23 23.3 20 101 73 -24 2 49 -23 56 51 -24 5 52 -23 53 48 0.09 -130 0 0 -24 12 25 19 23 24.4 20 101 74 -24 15 23 -24 9 26 -24 18 26 -24 6 23 0.09 -129 0 0 -24 24 38 19 23 25.4 21 100 75 -24 27 37 -24 21 40 -24 30 39 -24 18 37 0.09 -128 0 0 -24 36 30 19 23 26.5 22 100 76 -24 39 29 -24 33 32 -24 42 31 -24 30 30 0.09 -127 0 0 -24 48 1 19 23 27.7 23 100 77 -24 50 59 -24 45 3 -24 54 2 -24 42 1 0.09 -126 0 0 -24 59 11 19 23 28.9 24 99 78 -25 2 9 -24 56 13 -25 5 11 -24 53 11 0.09 -125 0 0 -25 9 59 19 23 30.1 25 99 79 -25 12 56 -25 7 1 -25 15 58 -25 4 0 0.09 -124 0 0 -25 20 26 19 23 31.4 26 98 80 -25 23 23 -25 17 28 -25 26 25 -25 14 27 0.09 -123 0 0 -25 30 31 19 23 32.7 27 98 80 -25 33 28 -25 27 34 -25 36 29 -25 24 32 0.09 -122 0 0 -25 40 14 19 23 34.1 28 97 81 -25 43 11 -25 37 17 -25 46 12 -25 34 16 0.09 -121 0 0 -25 49 36 19 23 35.5 29 97 82 -25 52 33 -25 46 39 -25 55 34 -25 43 38 0.09 -120 0 0 -25 58 36 19 23 36.9 30 96 83 -26 1 33 -25 55 40 -26 4 33 -25 52 39 0.09 -119 0 0 -26 7 14 19 23 38.4 31 96 83 -26 10 11 -26 4 18 -26 13 11 -26 1 18 0.09 -118 0 0 -26 15 31 19 23 39.9 32 95 84 -26 18 27 -26 12 35 -26 21 28 -26 9 35 0.09 -117 0 0 -26 23 26 19 23 41.4 32 95 84 -26 26 22 -26 20 30 -26 29 22 -26 17 30 0.09 -116 0 0 -26 30 59 19 23 43.0 33 95 85 -26 33 55 -26 28 3 -26 36 55 -26 25 3 0.09 -115 0 0 -26 38 10 19 23 44.6 34 94 85 -26 41 6 -26 35 15 -26 44 6 -26 32 15 0.09 -114 0 0 -26 45 0 19 23 46.3 35 94 85 -26 47 55 -26 42 4 -26 50 55 -26 39 4 0.09 -113 0 0 -26 51 27 19 23 48.0 36 93 85 -26 54 22 -26 48 32 -26 57 22 -26 45 32 0.09 -112 0 0 -26 57 33 19 23 49.7 37 93 85 -27 0 28 -26 54 37 -27 3 27 -26 51 38 0.09 -111 0 0 -27 3 16 19 23 51.5 38 92 85 -27 6 11 -27 0 21 -27 9 11 -26 57 22 0.09 -110 0 0 -27 8 38 19 23 53.2 39 92 84 -27 11 33 -27 5 43 -27 14 32 -27 2 44 0.09 -109 0 0 -27 13 37 19 23 55.1 40 91 84 -27 16 32 -27 10 43 -27 19 31 -27 7 43 0.09 -108 0 0 -27 18 15 19 23 56.9 41 91 83 -27 21 10 -27 15 20 -27 24 9 -27 12 21 0.09 -107 0 0 -27 22 31 19 23 58.8 42 90 82 -27 25 25 -27 19 36 -27 28 24 -27 16 37 0.09 -106 0 0 -27 26 25 19 24 0.7 42 89 81 -27 29 19 -27 23 30 -27 32 18 -27 20 31 0.09 -105 0 0 -27 29 56 19 24 2.7 43 89 81 -27 32 51 -27 27 2 -27 35 50 -27 24 3 0.09 -104 0 0 -27 33 6 19 24 4.6 44 88 80 -27 36 0 -27 30 12 -27 38 59 -27 27 13 0.09 -103 0 0 -27 35 54 19 24 6.7 45 88 79 -27 38 48 -27 32 59 -27 41 47 -27 30 1 0.09 -102 0 0 -27 38 19 19 24 8.7 46 87 78 -27 41 13 -27 35 25 -27 44 12 -27 32 26 0.08 -101 0 0 -27 40 23 19 24 10.8 47 87 77 -27 43 17 -27 37 28 -27 46 16 -27 34 30 0.08 -100 0 0 -27 42 4 19 24 12.9 48 86 77 -27 44 58 -27 39 10 -27 47 57 -27 36 12 0.08 - 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23 0 0 -11 58 42 19 27 50.9 57 256 3 -12 1 51 -11 55 34 -12 5 4 -11 52 21 0.09 - 22 0 0 -11 34 37 19 27 53.8 56 255 2 -11 37 45 -11 31 28 -11 40 59 -11 28 15 0.09 - 21 0 0 -11 10 22 19 27 56.6 55 255 1 -11 13 30 -11 7 13 -11 16 43 -11 4 0 0.09 - 20 0 0 -10 45 57 19 27 59.4 54 255 0 -10 49 5 -10 42 48 -10 52 19 -10 39 34 0.09 - 19 0 0 -10 21 23 19 28 2.1 53 254 -1 -10 24 32 -10 18 14 -10 27 45 -10 15 0 0.09 - 18 0 0 - 9 56 41 19 28 4.9 52 254 -2 - 9 59 50 - 9 53 32 -10 3 3 - 9 50 18 0.09 - 17 0 0 - 9 31 51 19 28 7.6 51 254 -3 - 9 35 0 - 9 28 42 - 9 38 14 - 9 25 28 0.09 - 16 0 0 - 9 6 54 19 28 10.2 50 253 -4 - 9 10 3 - 9 3 45 - 9 13 17 - 9 0 31 0.09 - 15 0 0 - 8 41 50 19 28 12.8 49 253 -5 - 8 45 0 - 8 38 41 - 8 48 14 - 8 35 27 0.09 - 14 0 0 - 8 16 41 19 28 15.4 48 253 -6 - 8 19 50 - 8 13 32 - 8 23 4 - 8 10 18 0.09 - 13 0 0 - 7 51 26 19 28 18.0 47 252 -7 - 7 54 36 - 7 48 17 - 7 57 50 - 7 45 3 0.09 - 12 0 0 - 7 26 7 19 28 20.5 46 252 -9 - 7 29 16 - 7 22 57 - 7 32 31 - 7 19 43 0.09 - 11 0 0 - 7 0 43 19 28 22.9 45 252 -10 - 7 3 53 - 6 57 34 - 7 7 7 - 6 54 20 0.09 - 10 0 0 - 6 35 17 19 28 25.3 43 252 -11 - 6 38 26 - 6 32 7 - 6 41 41 - 6 28 53 0.09 - 9 0 0 - 6 9 47 19 28 27.7 42 252 -12 - 6 12 57 - 6 6 38 - 6 16 11 - 6 3 23 0.09 - 8 0 0 - 5 44 16 19 28 30.0 41 251 -13 - 5 47 25 - 5 41 6 - 5 50 40 - 5 37 52 0.09 - 7 0 0 - 5 18 43 19 28 32.3 40 251 -14 - 5 21 52 - 5 15 33 - 5 25 7 - 5 12 19 0.09 - 6 0 0 - 4 53 9 19 28 34.5 39 251 -15 - 4 56 18 - 4 49 59 - 4 59 33 - 4 46 45 0.09 - 5 0 0 - 4 27 35 19 28 36.7 38 251 -16 - 4 30 44 - 4 24 25 - 4 33 59 - 4 21 11 0.09 - 4 0 0 - 4 2 1 19 28 38.8 37 251 -17 - 4 5 11 - 3 58 52 - 4 8 25 - 3 55 38 0.09 - 3 0 0 - 3 36 29 19 28 40.9 36 251 -18 - 3 39 39 - 3 33 20 - 3 42 53 - 3 30 6 0.09 - 2 0 0 - 3 10 59 19 28 42.9 35 251 -19 - 3 14 8 - 3 7 49 - 3 17 23 - 3 4 35 0.09 - 1 0 0 - 2 45 31 19 28 44.8 34 251 -21 - 2 48 40 - 2 42 22 - 2 51 55 - 2 39 8 0.09 0 0 0 - 2 20 6 19 28 46.7 33 250 -22 - 2 23 16 - 2 16 57 - 2 26 30 - 2 13 43 0.09 1 0 0 - 1 54 45 19 28 48.6 31 250 -23 - 1 57 54 - 1 51 36 - 2 1 8 - 1 48 22 0.09 2 0 0 - 1 29 29 19 28 50.4 30 250 -24 - 1 32 38 - 1 26 19 - 1 35 52 - 1 23 6 0.09 3 0 0 - 1 4 17 19 28 52.1 29 250 -25 - 1 7 26 - 1 1 8 - 1 10 40 - 0 57 54 0.10 4 0 0 - 0 39 11 19 28 53.8 28 250 -26 - 0 42 20 - 0 36 2 - 0 45 34 - 0 32 49 0.10 5 0 0 - 0 14 11 19 28 55.4 27 250 -27 - 0 17 20 - 0 11 3 - 0 20 34 - 0 7 49 0.10 6 0 0 0 10 41 19 28 56.9 26 250 -28 0 7 33 0 13 50 0 4 19 0 17 3 0.10 7 0 0 0 35 27 19 28 58.4 25 250 -29 0 32 18 0 38 35 0 29 5 0 41 48 0.10 8 0 0 1 0 4 19 28 59.9 24 250 -30 0 56 55 1 3 12 0 53 42 1 6 25 0.10 9 0 0 1 24 32 19 29 1.2 23 250 -31 1 21 24 1 27 40 1 18 11 1 30 53 0.10 10 0 0 1 48 52 19 29 2.5 22 250 -32 1 45 43 1 52 0 1 42 31 1 55 12 0.10 11 0 0 2 13 1 19 29 3.8 21 250 -34 2 9 53 2 16 9 2 6 41 2 19 21 0.10 12 0 0 2 37 0 19 29 5.0 20 250 -35 2 33 52 2 40 8 2 30 40 2 43 20 0.10 13 0 0 3 0 48 19 29 6.1 18 250 -36 2 57 41 3 3 56 2 54 29 3 7 8 0.10 14 0 0 3 24 25 19 29 7.1 17 250 -37 3 21 18 3 27 32 3 18 6 3 30 44 0.10 15 0 0 3 47 50 19 29 8.1 16 250 -38 3 44 43 3 50 57 3 41 31 3 54 9 0.10 16 0 0 4 11 2 19 29 9.1 15 250 -39 4 7 55 4 14 9 4 4 44 4 17 21 0.10 17 0 0 4 34 2 19 29 9.9 14 250 -40 4 30 55 4 37 9 4 27 44 4 40 20 0.10 18 0 0 4 56 48 19 29 10.7 13 251 -41 4 53 41 4 59 54 4 50 30 5 3 5 0.10 19 0 0 5 19 20 19 29 11.5 12 251 -42 5 16 14 5 22 26 5 13 3 5 25 37 0.10 20 0 0 5 41 38 19 29 12.2 11 251 -43 5 38 32 5 44 44 5 35 21 5 47 55 0.10 21 0 0 6 3 41 19 29 12.8 10 251 -44 6 0 35 6 6 47 5 57 25 6 9 57 0.11 22 0 0 6 25 29 19 29 13.3 9 251 -45 6 22 24 6 28 35 6 19 13 6 31 45 0.11 23 0 0 6 47 1 19 29 13.8 8 251 -46 6 43 56 6 50 7 6 40 46 6 53 17 0.11 24 0 0 7 8 18 19 29 14.2 7 251 -47 7 5 13 7 11 23 7 2 3 7 14 32 0.11 25 0 0 7 29 18 19 29 14.6 6 251 -48 7 26 13 7 32 23 7 23 4 7 35 32 0.12 26 0 0 7 50 1 19 29 14.9 5 251 -49 7 46 57 7 53 6 7 43 47 7 56 15 0.12 27 0 0 8 10 27 19 29 15.1 4 252 -51 8 7 23 8 13 31 8 4 14 8 16 40 0.13 28 0 0 8 30 36 19 29 15.3 3 252 -52 8 27 32 8 33 40 8 24 23 8 36 48 0.15 29 0 0 8 50 27 19 29 15.4 2 252 -53 8 47 23 8 53 31 8 44 15 8 56 39 0.19 30 0 0 9 10 0 19 29 15.5 0 252 -54 9 6 56 9 13 3 9 3 48 9 16 11 0.42 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 362-195990 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 38 00.7713 DE: -17 45 00.943 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 38 00.7713 DE: -17 45 00.944 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1894) Haffner asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.20450 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.013", 0.002", 72.936° remarks: * orbital elements for (1894)Haffner : Mean anomaly = 314.5406210954 deg Arg. of pericenter = 118.3382899689 deg Long. of node = 257.5004771476 deg Inclination = 0.9136807922 deg Eccentricity = 0.0705371840 Semimajor axis = 2.8866151607 AU Perihelion dist = 2.6830014561 AU Mag: H = 12.10, G = 0.15 Epoch of elements : MJD 60648.80988375 TDT (2024 Dec 04.8099) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr24,0.30,2024,12,4,19.437215,0.020590,-0.081934,19.137109,4.971706,0.004653,0.001275,-0.000001,0.000000 -55.8043,-17.6644,-113.93,-22.38,False UCAC4 362-195990,20.63354764,-17.7502619,12.31,11.77,11.48,0.0,0,,20.65688471,-17.6644007,5.96,5.80,0,0,0 1894,Haffner,17.73,10.678,3.2045,0,0,3.675,13.65,,1.0,0 0,314.3779,2024,12,4,118.3383,257.5005,0.9137,0.07054,2.88662,2.68300,12.10,5.0,0.15 1.512,0.0130,0.0023,73,0.0024,Known errors,0.92,0,-1,-1 20241204_195990,60140.73 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org