IOTA/IOTA-ES occultation update for (1956) Artek / UCAC4 385-064997 event on 2024 Jan 04, 08:17 UT Visible from Summary ------- On 2024 Jan 04 UT, the 18.902 km diameter asteroid (1956) Artek will occult a 11.1 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.93 mag to 18.06 mag (the magnitude of the asteroid) for at most 0.650 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: 99 * date and approx. time of event: 2024 Jan 04, 08:13 - 2024 Jan 04, 08:21 * geocentric midpoint of event [JD]: 2460313.84562933 * magnitude of target star: 11.13 * magnitude drop [mag]: 6.93 * estimated maximum duration [s]: 0.650 * Moon: 48 % sunlit, 23° distance * Sun: 66° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 107°) * approx speed of asteroid's shadow [km/s]: 28.8633 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 385-064997 by 1956 Artek on 2024 Jan 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 - 96 0 0 19 47 37 8 14 2.5 0 104 -65 19 42 20 19 52 54 19 38 50 19 56 24 .... - 95 0 0 19 33 11 8 14 2.5 1 104 -64 19 27 53 19 38 28 19 24 23 19 41 58 0.03 - 94 0 0 19 18 25 8 14 2.6 2 105 -63 19 13 7 19 23 43 19 9 37 19 27 13 0.00 - 93 0 0 19 3 19 8 14 2.8 3 105 -62 18 58 1 19 8 38 18 54 30 19 12 9 -0.01 - 92 0 0 18 47 55 8 14 3.1 4 105 -61 18 42 36 18 53 14 18 39 5 18 56 45 -0.02 - 91 0 0 18 32 11 8 14 3.4 5 106 -60 18 26 52 18 37 30 18 23 21 18 41 2 -0.02 - 90 0 0 18 16 8 8 14 3.8 6 106 -59 18 10 48 18 21 28 18 7 17 18 24 59 -0.03 - 89 0 0 17 59 47 8 14 4.2 7 106 -58 17 54 26 18 5 7 17 50 55 18 8 38 -0.03 - 88 0 0 17 43 6 8 14 4.8 8 107 -57 17 37 46 17 48 27 17 34 14 17 51 59 -0.03 - 87 0 0 17 26 8 8 14 5.3 9 107 -56 17 20 46 17 31 29 17 17 14 17 35 1 -0.03 - 86 0 0 17 8 51 8 14 6.0 10 107 -55 17 3 29 17 14 12 16 59 57 17 17 45 -0.03 - 85 0 0 16 51 16 8 14 6.7 11 108 -54 16 45 54 16 56 37 16 42 21 17 0 10 -0.03 - 84 0 0 16 33 23 8 14 7.5 12 108 -53 16 28 0 16 38 45 16 24 27 16 42 18 -0.04 - 83 0 0 16 15 12 8 14 8.4 13 108 -52 16 9 49 16 20 35 16 6 16 16 24 8 -0.04 - 82 0 0 15 56 44 8 14 9.3 14 108 -51 15 51 21 16 2 8 15 47 48 16 5 41 -0.04 - 81 0 0 15 38 0 8 14 10.3 15 109 -50 15 32 36 15 43 23 15 29 2 15 46 57 -0.04 - 80 0 0 15 18 58 8 14 11.4 16 109 -49 15 13 34 15 24 22 15 10 0 15 27 56 -0.04 - 79 0 0 14 59 40 8 14 12.5 17 109 -48 14 54 15 15 5 4 14 50 41 15 8 39 -0.04 - 78 0 0 14 40 6 8 14 13.7 18 110 -47 14 34 41 14 45 30 14 31 6 14 49 5 -0.04 - 77 0 0 14 20 15 8 14 15.0 19 110 -46 14 14 50 14 25 41 14 11 15 14 29 16 -0.04 - 76 0 0 14 0 9 8 14 16.4 20 110 -45 13 54 44 14 5 35 13 51 9 14 9 10 -0.04 - 75 0 0 13 39 48 8 14 17.8 21 110 -44 13 34 22 13 45 14 13 30 47 13 48 50 -0.04 - 74 0 0 13 19 12 8 14 19.3 23 111 -43 13 13 46 13 24 39 13 10 10 13 28 15 -0.04 - 73 0 0 12 58 22 8 14 20.9 24 111 -42 12 52 55 13 3 49 12 49 19 13 7 25 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-14 54 46 -15 8 45 -14 51 17 -0.03 78 0 0 -14 46 50 8 21 23.5 2 257 67 -14 52 6 -14 41 34 -14 55 35 -14 38 6 -0.02 79 0 0 -14 33 19 8 21 23.7 1 257 67 -14 38 35 -14 28 3 -14 42 4 -14 24 34 0.00 80 0 0 -14 19 28 8 21 23.7 0 257 66 -14 24 44 -14 14 11 -14 28 13 -14 10 42 0.18 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 385-064997 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 21 28.3320 DE: -13 01 34.399 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 21 28.3327 DE: -13 01 34.402 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1956) Artek asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.26200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.017", 0.003", 107.351° remarks: * orbital elements for (1956)Artek : Mean anomaly = 49.1441909151 deg Arg. of pericenter = 347.3612094864 deg Long. of node = 153.1191427195 deg Inclination = 1.4972612257 deg Eccentricity = 0.1094204464 Semimajor axis = 3.1999869506 AU Perihelion dist = 2.8498429499 AU Mag: H = 12.19, G = 0.15 Epoch of elements : MJD 60313.34562958 TDT (2024 Jan 04.3456) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.65,2024,1,4,8.295104,0.012118,0.048965,15.541905,-4.884121,-0.005161,0.001808,-0.000001,0.000000 -12.1860,-13.1351,56.74,-22.76,False UCAC4 385-064997,14.35786998,-13.0262217,11.64,11.13,10.85,0.0,0,,14.37929588,-13.1351254,6.93,6.75,0,0,0 1956,Artek,18.06,18.902,3.2620,0,0,2.869,-13.17,,2.2,0 0,49.0847,2024,1,4,347.3612,153.1191,1.4973,0.10942,3.19999,2.84984,12.19,5.0,0.15 1.330,0.0173,0.0027,107,0.0027,Known errors,1.04,0,-1,-1 20240104_064997,60137.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 11, 23:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org