IOTA/IOTA-ES occultation update for (5120) Bitias / UCAC4 289-178996 event on 2022 Jul 20, 00:14 UT Visible from South America Summary ------- On 2022 Jul 20 UT, the 48 km diameter asteroid (5120) Bitias will occult a 12.3 mag star in the constellation Sagittarius 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 4.74 mag to 17.07 mag (the magnitude of the asteroid) for at most 2.980 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: 24 * date and approx. time of event: 2022 Jul 20, 00:08 - 2022 Jul 20, 00:21 * geocentric midpoint of event [JD]: 2459780.51043154 * magnitude of target star: 12.34 * magnitude drop [mag]: 4.74 * estimated maximum duration [s]: 2.980 * Moon: 55 % sunlit, 105° distance * Sun: 157° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 2.82 * 1 sigma uncertainty interval [seconds]: +/- 6.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.056, +/- 0.028) * 1 sigma uncertainty ellipse (major, minor, PA): (0.063", 0.005", 63°) * approx speed of asteroid's shadow [km/s]: 16.1100 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 289-178996 by 5120 Bitias on 2022 Jul 20 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 -106 0 0 15 6 27 0 21 35.0 0 124 16 15 22 9 14 50 44 .. .. .. 13 22 4 .... -105 0 0 14 27 11 0 21 34.9 1 124 15 14 42 57 14 11 24 16 11 39 12 42 22 0.17 -104 0 0 13 47 17 0 21 34.6 3 124 14 14 3 7 13 31 26 15 32 11 12 2 2 0.13 -103 0 0 13 6 45 0 21 34.2 4 124 13 13 22 39 12 50 51 14 52 5 11 21 4 0.12 -102 0 0 12 25 37 0 21 33.5 5 125 12 12 41 34 12 9 38 14 11 22 10 39 30 0.11 -101 0 0 11 43 52 0 21 32.7 6 125 11 11 59 54 11 27 50 13 30 2 9 57 21 0.11 -100 0 0 11 1 33 0 21 31.7 7 125 10 11 17 38 10 45 27 12 48 6 9 14 37 0.10 - 99 0 0 10 18 39 0 21 30.6 9 125 8 10 34 48 10 2 30 12 5 37 8 31 20 0.10 - 98 0 0 9 35 14 0 21 29.2 10 125 7 9 51 26 9 19 1 11 22 33 7 47 32 0.10 - 97 0 0 8 51 16 0 21 27.7 11 126 6 9 7 32 8 35 0 10 38 58 7 3 12 0.10 - 96 0 0 8 6 48 0 21 26.0 12 126 5 8 23 7 7 50 29 9 54 52 6 18 23 0.10 - 95 0 0 7 21 52 0 21 24.1 14 126 4 7 38 14 7 5 30 9 10 16 5 33 6 0.10 - 94 0 0 6 36 28 0 21 22.0 15 126 3 6 52 53 6 20 3 8 25 11 4 47 22 0.10 - 93 0 0 5 50 38 0 21 19.7 16 126 1 6 7 6 5 34 10 7 39 40 4 1 13 0.09 - 92 0 0 5 4 23 0 21 17.2 17 126 0 5 20 54 4 47 53 6 53 43 3 14 41 0.09 - 91 0 0 4 17 46 0 21 14.5 19 126 -1 4 34 19 4 1 13 6 7 23 2 27 46 0.09 - 90 0 0 3 30 48 0 21 11.7 20 126 -2 3 47 23 3 14 12 5 20 40 1 40 32 0.09 - 89 0 0 2 43 30 0 21 8.6 21 126 -3 3 0 7 2 26 51 4 33 37 0 52 59 0.09 - 88 0 0 1 55 54 0 21 5.4 22 126 -5 2 12 33 1 39 14 3 46 15 0 5 10 0.09 - 87 0 0 1 8 2 0 21 2.0 24 126 -6 1 24 44 0 51 20 2 58 35 - 0 42 55 0.09 - 86 0 0 0 19 57 0 20 58.4 25 126 -7 0 36 40 0 3 13 2 10 41 - 1 31 12 0.09 - 85 0 0 - 0 28 21 0 20 54.6 26 126 -8 - 0 11 37 - 0 45 7 1 22 33 - 2 19 40 0.09 - 84 0 0 - 1 16 49 0 20 50.6 27 126 -9 - 1 0 3 - 1 33 36 0 34 14 - 3 8 17 0.09 - 83 0 0 - 2 5 26 0 20 46.5 29 126 -11 - 1 48 38 - 2 22 13 - 0 14 14 - 3 57 1 0.09 - 82 0 0 - 2 54 8 0 20 42.2 30 126 -12 - 2 37 20 - 3 10 57 - 1 2 51 - 4 45 51 0.09 - 81 0 0 - 3 42 55 0 20 37.7 31 126 -13 - 3 26 6 - 3 59 45 - 1 51 32 - 5 34 43 0.09 - 80 0 0 - 4 31 45 0 20 33.1 32 126 -14 - 4 14 55 - 4 48 35 - 2 40 18 - 6 23 36 0.09 - 79 0 0 - 5 20 34 0 20 28.3 34 126 -15 - 5 3 44 - 5 37 25 - 3 29 5 - 7 12 29 0.09 - 78 0 0 - 6 9 22 0 20 23.3 35 126 -17 - 5 52 32 - 6 26 13 - 4 17 51 - 8 1 18 0.09 - 77 0 0 - 6 58 7 0 20 18.2 36 125 -18 - 6 41 17 - 7 14 58 - 5 6 36 - 8 50 3 0.09 - 76 0 0 - 7 46 46 0 20 12.9 37 125 -19 - 7 29 56 - 8 3 36 - 5 55 16 - 9 38 41 0.09 - 75 0 0 - 8 35 17 0 20 7.5 39 125 -20 - 8 18 27 - 8 52 7 - 6 43 50 -10 27 10 0.09 - 74 0 0 - 9 23 39 0 20 2.0 40 125 -21 - 9 6 50 - 9 40 29 - 7 32 15 -11 15 28 0.09 - 73 0 0 -10 11 50 0 19 56.4 41 124 -23 - 9 55 1 -10 28 39 - 8 20 30 -12 3 34 0.09 - 72 0 0 -10 59 47 0 19 50.6 42 124 -24 -10 42 59 -11 16 35 - 9 8 34 -12 51 26 0.09 - 71 0 0 -11 47 29 0 19 44.7 44 124 -25 -11 30 43 -12 4 16 - 9 56 24 -13 39 1 0.09 - 70 0 0 -12 34 55 0 19 38.7 45 124 -26 -12 18 10 -12 51 41 -10 43 58 -14 26 18 0.09 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-28 56 11 0 8 30.6 7 237 -19 -28 40 28 -29 11 55 -27 12 2 -30 40 40 0.12 79 0 0 -28 20 18 0 8 29.8 6 236 -18 -28 4 31 -28 36 7 -26 35 41 -30 5 16 0.13 80 0 0 -27 43 43 0 8 29.1 5 236 -17 -27 27 51 -27 59 35 -25 58 37 -29 29 9 0.14 81 0 0 -27 6 24 0 8 28.5 4 235 -16 -26 50 28 -27 22 21 -25 20 51 -28 52 19 0.15 82 0 0 -26 28 23 0 8 28.1 2 235 -15 -26 12 23 -26 44 24 -24 42 22 -28 14 46 0.18 83 0 0 -25 49 40 0 8 27.9 1 234 -14 -25 33 36 -26 5 45 -24 3 11 -27 36 30 0.25 84 0 0 -25 10 15 0 8 27.8 0 234 -13 -24 54 6 -25 26 24 .. .. .. -26 57 32 1.09 Uncertainty in time = +/- 11 secs Prediction of 2022 Jun 13.9 Data for the target star ------------------------ * name: UCAC4 289-178996 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 26 31.5261 DE: -32 20 23.895 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 26 31.5261 DE: -32 20 23.895 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5120) Bitias asteroid class: approx. diameter [km]: 48 approx. diameter ["]: 0.017 distance from Earth [AU]: 3.84550 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#37 date of fit: 2022 Jun 10 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): 0.063", 0.005", 63.468° remarks: * orbital elements for (5120)Bitias : Mean anomaly = 326.4607217133 deg Arg. of pericenter = 24.2372952541 deg Long. of node = 295.9007491090 deg Inclination = 25.0082002907 deg Eccentricity = 0.1122052326 Semimajor axis = 5.2661308319 AU Perihelion dist = 4.6752433969 AU Mag: H = 10.41, G = 0.15 Epoch of elements : MJD 59780.01006944 TDT (2022 Jul 20.0101) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#372022Jun10,2.98,2022,7,20,0.250357,-0.041731,-0.094044,-8.308999,3.693566,0.002025,0.000949,0.000001,0.000000 -24.5205,-32.3269,177.84,20.70,False UCAC4 289-178996,18.44209059,-32.3399708,0.00,12.34,0.00,0.0,0,,18.46677450,-32.3269084,4.74,0.00,0,0,0 5120,Bitias,17.07,48.0,3.8455,0,0,-1.499,8.45,,4.8 0,326.3783,2022,7,19,24.2373,295.9007,25.0082,0.11221,5.26613,4.67524,10.33,5.0,0.15 3.816,0.0627,0.0050,63,0.0485,Known errors,-1.00,-1,-1,-1 20220720_178996,59743.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Jun 13, 20:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org