IOTA/IOTA-ES occultation update for (29) Amphitrite / TYC 7345-01083-1 event on 2022 Jun 27, 00:37 UT Visible from Africa, South America Summary ------- On 2022 Jun 27 UT, the 202 km diameter asteroid (29) Amphitrite will occult a 11.5 mag star in the constellation Scorpius for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.27 mag to 10.09 mag (the magnitude of the asteroid) for at most 20.570 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: 2022 Jun 27, 00:26 - 2022 Jun 27, 00:48 * geocentric midpoint of event [JD]: 2459757.52607245 * magnitude of target star: 11.47 * magnitude drop [mag]: 0.27 * estimated maximum duration [s]: 20.570 * Moon: 4 % sunlit, 172° distance * Sun: 155° distance * rough path description: Africa, South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 205 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.031, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.016", 100°) * approx speed of asteroid's shadow [km/s]: 9.8196 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7345-01083-1 by 29 Amphitrite on 2022 Jun 27 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 -114 0 0 20 22 31 0 48 14.4 1 124 19 21 29 52 19 15 27 21 44 5 19 1 22 .... -113 0 0 19 44 5 0 48 14.0 2 125 18 20 51 32 18 36 54 21 5 47 18 22 47 -0.06 -112 0 0 19 5 18 0 48 13.4 3 125 17 20 12 52 17 58 1 20 27 8 17 43 53 -0.10 -111 0 0 18 26 12 0 48 12.5 5 125 16 19 33 51 17 18 50 19 48 8 17 4 41 -0.12 -110 0 0 17 46 48 0 48 11.3 6 126 15 18 54 32 16 39 21 19 8 51 16 25 11 -0.13 -109 0 0 17 7 7 0 48 9.9 7 126 14 18 14 56 15 59 36 18 29 15 15 45 25 -0.14 -108 0 0 16 27 11 0 48 8.2 8 126 12 17 35 4 15 19 36 17 49 23 15 5 24 -0.15 -107 0 0 15 47 1 0 48 6.2 9 126 11 16 54 56 14 39 23 17 9 17 14 25 10 -0.15 -106 0 0 15 6 38 0 48 4.0 10 127 10 16 14 36 13 58 57 16 28 57 13 44 44 -0.16 -105 0 0 14 26 3 0 48 1.4 11 127 9 15 34 3 13 18 21 15 48 25 13 4 7 -0.16 -104 0 0 13 45 18 0 47 58.6 13 127 8 14 53 20 12 37 35 15 7 42 12 23 21 -0.16 -103 0 0 13 4 25 0 47 55.6 14 127 7 14 12 27 11 56 41 14 26 49 11 42 27 -0.16 -102 0 0 12 23 25 0 47 52.2 15 128 6 13 31 27 11 15 40 13 45 49 11 1 27 -0.16 -101 0 0 11 42 18 0 47 48.6 16 128 4 12 50 20 10 34 35 13 4 42 10 20 21 -0.17 -100 0 0 11 1 8 0 47 44.7 17 128 3 12 9 8 9 53 25 12 23 29 9 39 12 -0.17 - 99 0 0 10 19 54 0 47 40.5 19 128 2 11 27 52 9 12 13 11 42 13 8 58 0 -0.17 - 98 0 0 9 38 39 0 47 36.0 20 128 1 10 46 35 8 31 1 11 0 55 8 16 48 -0.17 - 97 0 0 8 57 24 0 47 31.3 21 129 0 10 5 16 7 49 48 10 19 37 7 35 36 -0.17 - 96 0 0 8 16 10 0 47 26.3 22 129 -1 9 23 59 7 8 38 9 38 18 6 54 27 -0.17 - 95 0 0 7 34 59 0 47 21.1 23 129 -3 8 42 44 6 27 31 8 57 2 6 13 21 -0.17 - 94 0 0 6 53 52 0 47 15.6 24 129 -4 8 1 32 5 46 29 8 15 50 5 32 19 -0.17 - 93 0 0 6 12 50 0 47 9.8 26 129 -5 7 20 25 5 5 32 7 34 42 4 51 24 -0.17 - 92 0 0 5 31 56 0 47 3.8 27 129 -6 6 39 25 4 24 44 6 53 40 4 10 37 -0.17 - 91 0 0 4 51 10 0 46 57.6 28 130 -7 5 58 33 3 44 4 6 12 47 3 29 58 -0.17 - 90 0 0 4 10 33 0 46 51.1 29 130 -8 5 17 49 3 3 34 5 32 2 2 49 29 -0.17 - 89 0 0 3 30 7 0 46 44.4 30 130 -10 4 37 16 2 23 15 4 51 27 2 9 12 -0.17 - 88 0 0 2 49 53 0 46 37.5 32 130 -11 3 56 55 1 43 9 4 11 4 1 29 7 -0.17 - 87 0 0 2 9 53 0 46 30.3 33 130 -12 3 16 47 1 3 16 3 30 54 0 49 17 -0.17 - 86 0 0 1 30 7 0 46 22.9 34 130 -13 2 36 52 0 23 39 2 50 58 0 9 41 -0.17 - 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9 53 42 -12 26 43 -0.17 52 0 0 -10 38 13 0 27 0.9 10 240 -33 - 9 34 40 -11 41 32 - 9 21 15 -11 54 51 -0.17 53 0 0 -10 5 29 0 26 58.9 8 239 -32 - 9 1 42 -11 9 3 - 8 48 13 -11 22 24 -0.17 54 0 0 - 9 32 12 0 26 57.1 7 239 -31 - 8 28 9 -10 35 59 - 8 14 38 -10 49 23 -0.17 55 0 0 - 8 58 20 0 26 55.6 6 239 -30 - 7 54 4 -10 2 22 - 7 40 30 -10 15 49 -0.17 56 0 0 - 8 23 56 0 26 54.3 5 239 -29 - 7 19 26 - 9 28 12 - 7 5 49 - 9 41 42 -0.17 57 0 0 - 7 49 0 0 26 53.2 4 239 -28 - 6 44 15 - 8 53 29 - 6 30 35 - 9 7 2 -0.17 58 0 0 - 7 13 31 0 26 52.5 3 239 -27 - 6 8 33 - 8 18 14 - 5 54 49 - 8 31 50 -0.16 59 0 0 - 6 37 32 0 26 51.9 2 239 -26 - 5 32 19 - 7 42 28 - 5 18 33 - 7 56 7 -0.15 60 0 0 - 6 1 1 0 26 51.7 0 238 -24 .. .. .. - 7 6 12 .. .. .. - 7 19 53 -0.06 Uncertainty in time = +/- 4 secs Prediction of 2022 Apr 29.9 Data for the target star ------------------------ * name: TYC 7345-01083-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 33 25.0209 DE: -31 22 24.631 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 33 25.0208 DE: -31 22 24.631 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29) Amphitrite asteroid class: ShapeModel approx. diameter [km]: 202 approx. diameter ["]: 0.157 distance from Earth [AU]: 1.77400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#156 date of fit: 2021 Aug 25 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): 0.032", 0.016", 100.324° remarks: * orbital elements for (29)Amphitrite : Mean anomaly = 203.8348028998 deg Arg. of pericenter = 63.0603096421 deg Long. of node = 356.3297098986 deg Inclination = 6.0827699310 deg Eccentricity = 0.0735429311 Semimajor axis = 2.5538340203 AU Perihelion dist = 2.3660175807 AU Mag: H = 6.05, G = 0.20 Epoch of elements : MJD 59757.02597222 TDT (2022 Jun 27.0260) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1562021Aug25,20.57,2022,6,27,0.625739,0.042971,0.150038,-5.335719,1.499557,0.002318,0.000490,0.000001,0.000000 -35.7832,-31.4213,171.37,23.33,False TYC 7345-01083-1,16.55695024,-31.3735087,0.00,11.47,0.00,0.0,0,,16.58099407,-31.4212763,0.27,0.00,0,0,0 29,Amphitrite,10.09,202.0,1.7740,0,0,-2.065,7.43,,10.2 0,203.5870,2022,6,26,63.0603,356.3297,6.0828,0.07354,2.55383,2.36602,6.05,5.0,0.15 1.105,0.0317,0.0163,100,0.0165,Known errors,-1.00,-1,-1,-1 20220627_1083-1,59698.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Apr 29, 20:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org