IOTA/IOTA-ES occultation update for (1001) Gaussia / UCAC4-551-010240 event on 2022 Feb 16, 23:46 UT Visible from South America Summary ------- On 2022 Feb 16 UT, the 75.1 km diameter asteroid (1001) Gaussia will occult a 12.3 mag star in the constellation Taurus 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 2.83 mag to 15.07 mag (the magnitude of the asteroid) for at most 7.130 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: 98 * date and approx. time of event: 2022 Feb 16, 23:36 - 2022 Feb 16, 23:55 * geocentric midpoint of event [JD]: 2459627.49038766 * magnitude of target star: 12.32 * magnitude drop [mag]: 2.83 * estimated maximum duration [s]: 7.130 * Moon: 100 % sunlit, 81° distance * Sun: 103° distance * rough path description: South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 81 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 3.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.014", 92°) * approx speed of asteroid's shadow [km/s]: 10.5342 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-551-010240 by 1001 Gaussia on 2022 Feb 16 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 -154 0 0 -16 33 2 23 36 43.3 1 69 73 -16 56 20 -16 9 48 -17 12 25 -15 53 49 .... -153 0 0 -16 10 57 23 36 43.6 2 68 72 -16 34 14 -15 47 43 -16 50 19 -15 31 45 0.20 -152 0 0 -15 48 56 23 36 44.1 3 68 71 -16 12 12 -15 25 44 -16 28 16 -15 9 46 0.26 -151 0 0 -15 27 1 23 36 44.8 4 68 71 -15 50 16 -15 3 50 -16 6 20 -14 47 53 0.29 -150 0 0 -15 5 12 23 36 45.7 5 68 70 -15 28 26 -14 42 2 -15 44 29 -14 26 6 0.31 -149 0 0 -14 43 29 23 36 46.8 6 67 69 -15 6 42 -14 20 20 -15 22 44 -14 4 25 0.32 -148 0 0 -14 21 54 23 36 48.2 7 67 68 -14 45 6 -13 58 46 -15 1 7 -13 42 51 0.33 -147 0 0 -14 0 26 23 36 49.7 8 67 67 -14 23 37 -13 37 19 -14 39 37 -13 21 25 0.33 -146 0 0 -13 39 6 23 36 51.5 9 67 66 -14 2 15 -13 16 0 -14 18 15 -13 0 8 0.34 -145 0 0 -13 17 55 23 36 53.5 10 66 65 -13 41 3 -12 54 50 -13 57 2 -12 38 59 0.34 -144 0 0 -12 56 53 23 36 55.7 11 66 64 -13 20 0 -12 33 50 -13 35 57 -12 17 59 0.34 -143 0 0 -12 36 1 23 36 58.1 12 66 63 -12 59 6 -12 12 59 -13 15 3 -11 57 9 0.35 -142 0 0 -12 15 19 23 37 0.7 13 66 62 -12 38 23 -11 52 18 -12 54 19 -11 36 29 0.35 -141 0 0 -11 54 48 23 37 3.5 14 65 61 -12 17 50 -11 31 49 -12 33 45 -11 16 1 0.35 -140 0 0 -11 34 28 23 37 6.6 15 65 60 -11 57 29 -11 11 30 -12 13 23 -10 55 43 0.35 -139 0 0 -11 14 20 23 37 9.8 16 65 59 -11 37 19 -10 51 24 -11 53 12 -10 35 38 0.36 -138 0 0 -10 54 24 23 37 13.3 18 65 58 -11 17 22 -10 31 29 -11 33 14 -10 15 44 0.36 -137 0 0 -10 34 41 23 37 17.0 19 65 57 -10 57 37 -10 11 48 -11 13 28 - 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0 21 57 0.39 - 87 0 0 - 0 56 47 23 43 53.6 65 32 5 - 1 18 41 - 0 34 57 - 1 33 48 - 0 19 57 0.39 - 86 0 0 - 0 55 12 23 44 4.4 65 30 4 - 1 17 5 - 0 33 22 - 1 32 12 - 0 18 21 0.39 - 85 0 0 - 0 54 2 23 44 15.2 66 28 3 - 1 15 55 - 0 32 12 - 1 31 1 - 0 17 11 0.39 - 84 0 0 - 0 53 18 23 44 26.0 67 26 2 - 1 15 11 - 0 31 28 - 1 30 17 - 0 16 27 0.39 - 83 0 0 - 0 52 59 23 44 36.9 67 24 1 - 1 14 52 - 0 31 9 - 1 29 58 - 0 16 9 0.39 - 82 0 0 - 0 53 6 23 44 47.8 67 22 0 - 1 14 59 - 0 31 17 - 1 30 6 - 0 16 16 0.39 - 81 0 0 - 0 53 39 23 44 58.8 68 19 -2 - 1 15 32 - 0 31 49 - 1 30 39 - 0 16 49 0.39 - 80 0 0 - 0 54 38 23 45 9.8 68 17 -3 - 1 16 31 - 0 32 48 - 1 31 38 - 0 17 47 0.39 - 79 0 0 - 0 56 3 23 45 20.8 68 14 -4 - 1 17 56 - 0 34 12 - 1 33 3 - 0 19 11 0.39 - 78 0 0 - 0 57 53 23 45 31.8 69 12 -5 - 1 19 47 - 0 36 2 - 1 34 54 - 0 21 1 0.39 - 77 0 0 - 1 0 9 23 45 42.8 69 9 -6 - 1 22 3 - 0 38 18 - 1 37 10 - 0 23 17 0.39 - 76 0 0 - 1 2 50 23 45 53.9 69 6 -7 - 1 24 45 - 0 40 59 - 1 39 53 - 0 25 58 0.39 - 75 0 0 - 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27 0 0 -11 13 37 23 53 45.7 33 303 -51 -11 36 40 -10 50 39 -11 52 34 -10 34 51 0.38 - 26 0 0 -11 34 1 23 53 52.1 32 303 -51 -11 57 5 -11 11 1 -12 13 1 -10 55 12 0.38 - 25 0 0 -11 54 37 23 53 58.4 31 302 -52 -12 17 42 -11 31 35 -12 33 39 -11 15 45 0.38 - 24 0 0 -12 15 24 23 54 4.5 30 302 -52 -12 38 31 -11 52 21 -12 54 29 -11 36 30 0.38 - 23 0 0 -12 36 23 23 54 10.4 29 302 -53 -12 59 31 -12 13 18 -13 15 30 -11 57 27 0.38 - 22 0 0 -12 57 32 23 54 16.1 28 301 -53 -13 20 42 -12 34 26 -13 36 42 -12 18 34 0.38 - 21 0 0 -13 18 52 23 54 21.5 27 301 -54 -13 42 3 -12 55 45 -13 58 4 -12 39 51 0.38 - 20 0 0 -13 40 21 23 54 26.8 26 301 -54 -14 3 33 -13 17 12 -14 19 35 -13 1 18 0.38 - 19 0 0 -14 1 59 23 54 31.9 25 300 -55 -14 25 13 -13 38 49 -14 41 15 -13 22 54 0.38 - 18 0 0 -14 23 45 23 54 36.8 24 300 -55 -14 47 0 -14 0 34 -15 3 3 -13 44 38 0.38 - 17 0 0 -14 45 40 23 54 41.5 23 300 -56 -15 8 56 -14 22 27 -15 25 0 -14 6 30 0.38 - 16 0 0 -15 7 41 23 54 46.0 22 299 -56 -15 30 58 -14 44 28 -15 47 3 -14 28 30 0.38 - 15 0 0 -15 29 49 23 54 50.2 21 299 -56 -15 53 8 -15 6 35 -16 9 13 -14 50 36 0.38 - 14 0 0 -15 52 4 23 54 54.3 20 299 -57 -16 15 23 -15 28 48 -16 31 29 -15 12 49 0.38 - 13 0 0 -16 14 24 23 54 58.2 19 298 -57 -16 37 44 -15 51 7 -16 53 51 -15 35 7 0.38 - 12 0 0 -16 36 48 23 55 1.8 17 298 -57 -17 0 9 -16 13 31 -17 16 17 -15 57 31 0.38 - 11 0 0 -16 59 18 23 55 5.2 16 298 -57 -17 22 39 -16 35 59 -17 38 48 -16 19 58 0.38 - 10 0 0 -17 21 50 23 55 8.4 15 297 -57 -17 45 13 -16 58 32 -18 1 22 -16 42 30 0.38 - 9 0 0 -17 44 27 23 55 11.5 14 297 -57 -18 7 50 -17 21 7 -18 23 59 -17 5 5 0.38 - 8 0 0 -18 7 5 23 55 14.3 13 297 -57 -18 30 29 -17 43 45 -18 46 39 -17 27 43 0.38 - 7 0 0 -18 29 46 23 55 16.8 12 296 -57 -18 53 11 -18 6 25 -19 9 21 -17 50 23 0.38 - 6 0 0 -18 52 29 23 55 19.2 11 296 -57 -19 15 54 -18 29 7 -19 32 4 -18 13 4 0.38 - 5 0 0 -19 15 12 23 55 21.4 10 296 -57 -19 38 37 -18 51 50 -19 54 48 -18 35 46 0.38 - 4 0 0 -19 37 55 23 55 23.3 9 295 -57 -20 1 21 -19 14 33 -20 17 32 -18 58 29 0.38 - 3 0 0 -20 0 38 23 55 25.1 8 295 -57 -20 24 5 -19 37 16 -20 40 16 -19 21 12 0.38 - 2 0 0 -20 23 21 23 55 26.6 7 295 -57 -20 46 47 -19 59 58 -21 2 59 -19 43 54 0.38 - 1 0 0 -20 46 2 23 55 28.0 6 294 -57 -21 9 29 -20 22 39 -21 25 40 -20 6 35 0.38 0 0 0 -21 8 41 23 55 29.1 5 294 -57 -21 32 8 -20 45 18 -21 48 20 -20 29 14 0.38 1 0 0 -21 31 18 23 55 30.0 4 293 -56 -21 54 45 -21 7 55 -22 10 57 -20 51 50 0.38 2 0 0 -21 53 52 23 55 30.7 3 293 -56 -22 17 19 -21 30 28 -22 33 30 -21 14 24 0.39 3 0 0 -22 16 22 23 55 31.3 2 293 -56 -22 39 49 -21 52 59 -22 56 1 -21 36 54 0.39 4 0 0 -22 38 48 23 55 31.6 1 292 -55 -23 2 15 -22 15 25 -23 18 27 -21 59 21 0.41 5 0 0 -23 1 10 23 55 31.7 0 292 -55 -23 24 36 -22 37 47 .. .. .. -22 21 43 0.61 Uncertainty in time = +/- 4 secs Prediction of 2022 Feb 14.8 Data for the target star ------------------------ * name: UCAC4-551-010240 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 38 21.6123 DE: +20 01 09.743 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 38 21.6122 DE: +20 01 09.743 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (2.400,1.700) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1001) Gaussia asteroid class: approx. diameter [km]: 75 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.52800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#73 date of fit: 2022 Feb 04 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): 0.021", 0.014", 91.736° remarks: * orbital elements for (1001)Gaussia : Mean anomaly = 36.1273026727 deg Arg. of pericenter = 145.7106756675 deg Long. of node = 259.1308056633 deg Inclination = 9.3166497300 deg Eccentricity = 0.1221134784 Semimajor axis = 3.2094121661 AU Perihelion dist = 2.8174996829 AU Mag: H = 9.76, G = 0.15 Epoch of elements : MJD 59626.99034722 TDT (2022 Feb 16.9903) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#732022Feb04,7.13,2022,2,16,23.769304,-0.017821,-0.361214,5.935817,-0.343928,0.005690,0.000830,0.000000,0.000000 -73.5691,20.0629,-173.04,-12.07,False UCAC4-551-010240,4.63933675,20.0193732,0.00,12.32,0.00,0.0,0,K,4.66088367,20.0628986,2.84,0.00,0,0,0 1001,Gaussia,15.07,75.1,2.5280,0,0,1.466,-1.19,,3.8 0,35.9575,2022,2,16,145.7107,259.1308,9.3166,0.12211,3.20941,2.81750,9.76,5.0,0.15 1.344,0.0215,0.0141,92,0.0141,Known errors,-1.00,-1,-1,-1 20220216_010240,59624.80 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Feb 14, 19:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org