IOTA/IOTA-ES occultation update for (3846) Hazel / UCAC4 350-103177 event on 2024 Feb 04, 08:12 UT Visible from Summary ------- On 2024 Feb 04 UT, the 21.0891825307827 km diameter asteroid (3846) Hazel will occult a 9.5 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.60 mag to 18.12 mag (the magnitude of the asteroid) for at most 0.660 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: 80 * date and approx. time of event: 2024 Feb 04, 08:09 - 2024 Feb 04, 08:15 * geocentric midpoint of event [JD]: 2460344.84197370 * magnitude of target star: 9.52 * magnitude drop [mag]: 8.60 * estimated maximum duration [s]: 0.660 * Moon: 36 % sunlit, 23° distance * Sun: 52° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.68 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.005", 73°) * approx speed of asteroid's shadow [km/s]: 35.1110 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 350-103177 by 3846 Hazel on 2024 Feb 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 - 91 0 0 -20 19 1 8 9 34.3 0 111 -44 -20 26 13 -20 11 51 -20 35 58 -20 2 7 - 20 24 46 - 20 13 17 .... - 90 0 0 -20 41 16 8 9 34.3 1 111 -43 -20 48 27 -20 34 5 -20 58 12 -20 24 22 - 20 47 0 - 20 35 31 0.32 - 89 0 0 -21 3 26 8 9 34.4 2 111 -43 -21 10 37 -20 56 15 -21 20 22 -20 46 32 - 21 9 11 - 20 57 42 0.33 - 88 0 0 -21 25 32 8 9 34.6 3 110 -42 -21 32 43 -21 18 21 -21 42 28 -21 8 38 - 21 31 17 - 21 19 48 0.33 - 87 0 0 -21 47 33 8 9 34.8 4 110 -41 -21 54 44 -21 40 23 -22 4 29 -21 30 40 - 21 53 18 - 21 41 49 0.33 - 86 0 0 -22 9 29 8 9 35.1 5 109 -40 -22 16 40 -22 2 18 -22 26 24 -21 52 36 - 22 15 13 - 22 3 45 0.33 - 85 0 0 -22 31 19 8 9 35.5 6 109 -39 -22 38 30 -22 24 8 -22 48 14 -22 14 26 - 22 37 3 - 22 25 35 0.34 - 84 0 0 -22 53 2 8 9 35.9 7 109 -38 -23 0 13 -22 45 52 -23 9 57 -22 36 10 - 22 58 46 - 22 47 18 0.34 - 83 0 0 -23 14 39 8 9 36.3 8 108 -37 -23 21 49 -23 7 29 -23 31 33 -22 57 46 - 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23 11 6 - 22 59 38 0.35 79 0 0 -22 43 38 8 15 5.0 22 256 71 -22 50 48 -22 36 27 -23 0 33 -22 26 44 - 22 49 22 - 22 37 54 0.35 80 0 0 -22 21 47 8 15 6.2 21 256 70 -22 28 58 -22 14 36 -22 38 42 -22 4 53 - 22 27 31 - 22 16 3 0.35 81 0 0 -21 59 50 8 15 7.3 20 256 69 -22 7 1 -21 52 39 -22 16 46 -21 42 56 - 22 5 34 - 21 54 6 0.35 82 0 0 -21 37 47 8 15 8.5 19 255 68 -21 44 58 -21 30 36 -21 54 43 -21 20 53 - 21 43 32 - 21 32 3 0.36 83 0 0 -21 15 39 8 15 9.5 18 255 67 -21 22 51 -21 8 28 -21 32 35 -20 58 45 - 21 21 24 - 21 9 55 0.36 84 0 0 -20 53 26 8 15 10.5 17 254 66 -21 0 38 -20 46 15 -21 10 23 -20 36 32 - 20 59 11 - 20 47 42 0.36 85 0 0 -20 31 9 8 15 11.4 16 254 66 -20 38 21 -20 23 58 -20 48 6 -20 14 15 - 20 36 54 - 20 25 25 0.36 86 0 0 -20 8 49 8 15 12.3 15 254 65 -20 16 0 -20 1 38 -20 25 45 -19 51 54 - 20 14 34 - 20 3 4 0.36 87 0 0 -19 46 25 8 15 13.2 14 253 64 -19 53 36 -19 39 14 -20 3 21 -19 29 30 - 19 52 10 - 19 40 40 0.36 88 0 0 -19 23 58 8 15 13.9 13 253 63 -19 31 10 -19 16 47 -19 40 55 -19 7 4 - 19 29 43 - 19 18 14 0.36 89 0 0 -19 1 30 8 15 14.7 12 253 62 -19 8 41 -18 54 19 -19 18 26 -18 44 35 - 19 7 14 - 18 55 45 0.37 90 0 0 -18 38 59 8 15 15.3 11 252 61 -18 46 11 -18 31 48 -18 55 56 -18 22 5 - 18 44 44 - 18 33 15 0.37 91 0 0 -18 16 28 8 15 15.9 10 252 60 -18 23 40 -18 9 17 -18 33 24 -17 59 34 - 18 22 13 - 18 10 44 0.37 92 0 0 -17 53 57 8 15 16.5 9 252 59 -18 1 8 -17 46 46 -18 10 52 -17 37 2 - 17 59 41 - 17 48 12 0.38 93 0 0 -17 31 25 8 15 16.9 8 251 58 -17 38 36 -17 24 14 -17 48 20 -17 14 31 - 17 37 9 - 17 25 41 0.38 94 0 0 -17 8 54 8 15 17.4 7 251 57 -17 16 5 -17 1 43 -17 25 49 -16 52 0 - 17 14 38 - 17 3 10 0.39 95 0 0 -16 46 24 8 15 17.7 5 251 56 -16 53 35 -16 39 13 -17 3 19 -16 29 31 - 16 52 8 - 16 40 40 0.40 96 0 0 -16 23 56 8 15 18.0 4 250 55 -16 31 6 -16 16 45 -16 40 50 -16 7 3 - 16 29 40 - 16 18 12 0.41 97 0 0 -16 1 30 8 15 18.3 3 250 54 -16 8 40 -15 54 20 -16 18 24 -15 44 38 - 16 7 14 - 15 55 46 0.43 98 0 0 -15 39 7 8 15 18.4 2 250 53 -15 46 17 -15 31 57 -15 56 0 -15 22 15 - 15 44 50 - 15 33 23 0.47 99 0 0 -15 16 47 8 15 18.6 1 250 52 -15 23 57 -15 9 37 -15 33 40 -14 59 56 - 15 22 30 - 15 11 3 0.57 100 0 0 -14 54 31 8 15 18.6 0 249 51 -15 1 40 -14 47 21 -15 11 23 -14 37 40 - 15 0 14 - 14 48 48 1.31 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 350-103177 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 29 06.8859 DE: -20 05 02.949 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 29 06.8859 DE: -20 05 02.949 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.5 * B mag [mag]: 11.4 * Diameter [mas]: 0.90 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3846) Hazel asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.45590 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.015", 0.005", 72.666° remarks: * orbital elements for (3846)Hazel : Mean anomaly = 88.3493634059 deg Arg. of pericenter = 285.8074487748 deg Long. of node = 223.4785899513 deg Inclination = 9.0336244229 deg Eccentricity = 0.0884199886 Semimajor axis = 2.9374039918 AU Perihelion dist = 2.6776787642 AU Mag: H = 12.23, G = 0.15 Epoch of elements : MJD 60344.34197362 TDT (2024 Feb 04.3420) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr24,0.66,2024,2,4,8.207369,0.016483,-0.317367,19.792993,0.987991,-0.004670,0.000447,-0.000001,0.000000 5.5197,-20.1041,60.35,-16.34,False UCAC4 350-103177,17.48524604,-20.0841525,11.42,9.52,8.49,0.9,4,,17.50871749,-20.1041185,8.60,9.17,0,0,0 3846,Hazel,18.12,23.345,3.4559,0,0,3.576,2.52,,1.6,0 0,88.2824,2024,2,4,285.8074,223.4786,9.0336,0.08842,2.93740,2.67768,12.23,5.0,0.15 1.677,0.0147,0.0053,73,0.0063,Known errors,0.73,0,-1,-1 20240204_103177,60138.15 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org