IOTA/IOTA-ES occultation update for (326) Tamara / TYC 3328-02926-1 event on 2024 Dec 16, 01:30 UT Visible from Summary ------- On 2024 Dec 16 UT, the 93.0856661896914 km diameter asteroid (326) Tamara will occult a 10.9 mag star in the constellation Perseus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.69 mag to 13.48 mag (the magnitude of the asteroid) for at most 6.680 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 Dec 16, 01:23 - 2024 Dec 16, 01:38 * geocentric midpoint of event [JD]: 2460660.56303946 * magnitude of target star: 10.89 * magnitude drop [mag]: 2.69 * estimated maximum duration [s]: 6.680 * Moon: 99 % sunlit, 30° distance * Sun: 151° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 100 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 58°) * approx speed of asteroid's shadow [km/s]: 13.9469 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 3328-02926-1 by 326 Tamara on 2024 Dec 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 -150 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 12 23 41 .. .. .. .... -149 0 0 12 40 44 1 37 52.7 1 42 24 13 21 24 12 0 19 13 30 11 11 51 40 .... -148 0 0 13 47 23 1 37 52.3 2 42 23 14 28 18 13 6 43 14 37 8 12 58 1 -0.34 -147 0 0 14 54 24 1 37 51.6 4 42 21 15 35 34 14 13 31 15 44 27 14 4 45 -0.35 -146 0 0 16 1 44 1 37 50.6 5 43 20 16 43 8 15 20 38 16 52 4 15 11 49 -0.35 -145 0 0 17 9 19 1 37 49.3 7 43 18 17 50 55 16 28 0 17 59 54 16 19 9 -0.35 -144 0 0 18 17 4 1 37 47.6 8 43 17 18 58 52 17 35 33 19 7 54 17 26 39 -0.36 -143 0 0 19 24 55 1 37 45.6 10 44 16 20 6 54 18 43 12 20 15 58 18 34 17 -0.36 -142 0 0 20 32 46 1 37 43.3 11 44 14 21 14 57 19 50 54 21 24 3 19 41 56 -0.36 -141 0 0 21 40 35 1 37 40.7 13 44 13 22 22 55 20 58 33 22 32 3 20 49 33 -0.36 -140 0 0 22 48 16 1 37 37.8 14 45 11 23 30 44 22 6 5 23 39 54 21 57 4 -0.36 -139 0 0 23 55 44 1 37 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0 31 2 37 1 24 5.2 18 314 -24 31 45 44 30 19 49 31 55 3 30 10 39 -0.39 54 0 0 29 57 52 1 24 1.7 17 315 -23 30 40 59 29 15 5 30 50 17 29 5 55 -0.39 55 0 0 28 52 27 1 23 58.4 15 315 -22 29 35 32 28 9 42 29 44 51 28 0 33 -0.40 56 0 0 27 46 26 1 23 55.3 14 316 -21 28 29 28 27 3 44 28 38 46 26 54 35 -0.40 57 0 0 26 39 53 1 23 52.5 13 316 -19 27 22 51 25 57 14 27 32 8 25 48 6 -0.40 58 0 0 25 32 52 1 23 50.0 11 317 -18 26 15 45 24 50 17 26 25 1 24 41 11 -0.41 59 0 0 24 25 27 1 23 47.7 10 317 -17 25 8 14 23 42 58 25 17 28 23 33 53 -0.41 60 0 0 23 17 43 1 23 45.8 8 318 -16 24 0 22 22 35 21 24 9 35 22 26 17 -0.42 61 0 0 22 9 44 1 23 44.1 7 318 -15 22 52 15 21 27 30 23 1 26 21 18 28 -0.43 62 0 0 21 1 35 1 23 42.7 5 318 -13 21 43 57 20 19 30 21 53 6 20 10 29 -0.45 63 0 0 19 53 20 1 23 41.7 4 319 -12 20 35 33 19 11 25 20 44 39 19 2 27 -0.49 64 0 0 18 45 5 1 23 41.0 2 319 -11 19 27 6 18 3 21 19 36 11 17 54 25 -0.56 65 0 0 17 36 53 1 23 40.6 1 319 -9 18 18 43 16 55 21 18 27 45 16 46 27 -0.86 66 0 0 .. .. .... .. .. .. .. .. .. 17 10 27 .. .. .. 17 19 26 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 3328-02926-1 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 10 16.4304 DE: +46 46 45.608 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 10 16.4304 DE: +46 46 45.608 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.9 * B mag [mag]: 11.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (326) Tamara asteroid class: approx. diameter [km]: 93 approx. diameter ["]: 0.070 distance from Earth [AU]: 1.83840 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#119 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): 0.015", 0.003", 58.468° remarks: * orbital elements for (326)Tamara : Mean anomaly = 160.7038671497 deg Arg. of pericenter = 238.8474348629 deg Long. of node = 32.1475939534 deg Inclination = 23.7042533384 deg Eccentricity = 0.1894954346 Semimajor axis = 2.3192576444 AU Perihelion dist = 1.8797689091 AU Mag: H = 9.32, G = 0.15 Epoch of elements : MJD 60660.06303963 TDT (2024 Dec 16.0630) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1192023Apr24,6.68,2024,12,16,1.512947,-0.023336,0.361542,-7.855659,-0.506854,0.001943,-0.002094,0.000001,0.000000 -44.8591,46.8466,156.22,-23.33,False TYC 3328-02926-1,4.17123068,46.7793355,11.77,10.89,10.41,0.1,0,,4.20174801,46.8466302,2.69,2.71,0,0,0 326,Tamara,13.48,93.219,1.8384,0,0,-3.661,-2.43,,5.8,0 0,160.4072,2024,12,15,238.8474,32.1476,23.7043,0.18950,2.31926,1.87977,9.32,5.0,0.15 1.108,0.0153,0.0026,58,0.0075,Known errors,1.05,0,-1,-1 20241216_2926-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org