IOTA/IOTA-ES occultation update for (29) Amphitrite / TYC 7344-00888-1 event on 2022 Jul 04, 15:35 UT Visible from New Zealand Summary ------- On 2022 Jul 04 UT, the 202 km diameter asteroid (29) Amphitrite will occult a 11.3 mag star in the constellation Scorpius for observers along a path across New Zealand. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.35 mag to 10.24 mag (the magnitude of the asteroid) for at most 25.190 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: 100 * date and approx. time of event: 2022 Jul 04, 15:22 - 2022 Jul 04, 15:49 * geocentric midpoint of event [JD]: 2459765.14989800 * magnitude of target star: 11.29 * magnitude drop [mag]: 0.35 * estimated maximum duration [s]: 25.190 * Moon: 26 % sunlit, 87° distance * Sun: 147° distance * rough path description: New Zealand Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 206 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 5.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.017) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.016", 101°) * approx speed of asteroid's shadow [km/s]: 8.0195 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7344-00888-1 by 29 Amphitrite on 2022 Jul 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 3 0 0 8 35 22 15 48 51.8 0 121 32 .. .. .. 7 30 3 .. .. .. 7 15 47 .... 4 0 0 7 58 28 15 48 51.5 1 122 31 9 3 47 6 52 55 9 17 58 6 38 37 0.22 5 0 0 7 21 3 15 48 51.0 3 122 29 8 26 35 6 15 15 8 40 49 6 0 54 0.20 6 0 0 6 43 5 15 48 50.0 4 122 28 7 48 51 5 37 4 8 3 9 5 22 39 0.19 7 0 0 6 4 37 15 48 48.8 5 122 27 7 10 37 4 58 22 7 24 57 4 43 54 0.18 8 0 0 5 25 39 15 48 47.2 6 122 26 6 31 52 4 19 10 6 46 15 4 4 40 0.18 9 0 0 4 46 12 15 48 45.2 7 122 25 5 52 38 3 39 31 6 7 4 3 24 57 0.18 10 0 0 4 6 18 15 48 42.9 9 122 24 5 12 57 2 59 23 5 27 25 2 44 47 0.18 11 0 0 3 25 57 15 48 40.2 10 122 22 4 32 48 2 18 50 4 47 19 2 4 11 0.18 12 0 0 2 45 11 15 48 37.2 11 122 21 3 52 14 1 37 52 4 6 47 1 23 10 0.18 13 0 0 2 4 0 15 48 33.8 12 122 20 3 11 15 0 56 29 3 25 51 0 41 45 0.17 14 0 0 1 22 27 15 48 30.1 13 122 19 2 29 52 0 14 45 2 44 31 - 0 0 2 0.17 15 0 0 0 40 31 15 48 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10 20 15 22 57.1 6 237 -31 -30 3 33 -32 17 24 -29 49 3 -32 32 2 0.22 -162 0 0 -30 35 15 15 22 55.8 5 237 -30 -29 28 13 -31 42 34 -29 13 39 -31 57 16 0.23 -161 0 0 -29 59 31 15 22 54.7 4 236 -29 -28 52 13 -31 7 6 -28 37 36 -31 21 51 0.25 -160 0 0 -29 23 9 15 22 53.8 3 236 -28 -28 15 36 -30 30 59 -28 0 56 -30 45 47 0.28 -159 0 0 -28 46 8 15 22 53.3 2 235 -27 -27 38 21 -29 54 13 -27 23 37 -30 9 5 0.35 -158 0 0 -28 8 30 15 22 53.0 0 235 -26 .. .. .. -29 16 50 .. .. .. -29 31 45 0.78 Uncertainty in time = +/- 5 secs Prediction of 2022 May 14.5 Data for the target star ------------------------ * name: TYC 7344-00888-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 27 50.1340 DE: -30 58 27.366 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 27 50.1339 DE: -30 58 27.367 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * 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 ["]: 0.153 distance from Earth [AU]: 1.81810 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): 0.031", 0.016", 101.2° remarks: * orbital elements for (29)Amphitrite : Mean anomaly = 205.6758662771 deg Arg. of pericenter = 63.0608420792 deg Long. of node = 356.3296259469 deg Inclination = 6.0827690870 deg Eccentricity = 0.0735516322 Semimajor axis = 2.5538145316 AU Perihelion dist = 2.3659773046 AU Mag: H = 6.05, G = 0.20 Epoch of elements : MJD 59764.64986111 TDT (2022 Jul 04.6499) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1562021Aug25,25.19,2022,7,4,15.597552,-0.071283,-0.183664,-4.211090,1.659960,0.003056,0.000266,0.000001,0.000000 90.7278,-31.0250,-52.83,22.84,False TYC 7344-00888-1,16.46392608,-30.9742685,0.00,11.29,0.00,0.0,0,,16.48784890,-31.0250395,0.35,0.00,0,0,0 29,Amphitrite,10.24,202.0,1.8181,0,0,-1.584,8.03,,10.2 0,205.5189,2022,7,4,63.0608,356.3296,6.0828,0.07355,2.55381,2.36598,6.05,5.0,0.15 1.109,0.0307,0.0160,101,0.0167,Known errors,-1.00,-1,-1,-1 20220704_0888-1,59713.50 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 May 14, 12:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org