IOTA/IOTA-ES occultation update for (911) Agamemnon / TYC 2892-00363-1 event on 2023 Feb 20, 11:46 UT Visible from China Summary ------- On 2023 Feb 20 UT, the 157.4 km diameter asteroid (911) Agamemnon will occult a 9.5 mag star in the constellation Perseus for observers along a path across China. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.99 mag to 15.52 mag (the magnitude of the asteroid) for at most 11.680 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: 98 * date and approx. time of event: 2023 Feb 20, 11:38 - 2023 Feb 20, 11:54 * geocentric midpoint of event [JD]: 2459995.99054208 * magnitude of target star: 9.53 * magnitude drop [mag]: 5.99 * estimated maximum duration [s]: 11.680 * Moon: 0 % sunlit, 100° distance * Sun: 101° distance * rough path description: China Additional comments ------------------- duplicated source flag The occultation path -------------------- * approximate projected width [km]: 158 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.005", 80°) * approx speed of asteroid's shadow [km/s]: 13.4775 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2892-00363-1 by 911 Agamemnon on 2023 Feb 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 - 31 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 36 3 50 .. .. .. 37 5 31 .... - 30 0 0 36 2 5 11 38 31.0 1 31 31 .. .. .. 37 25 21 .. .. .. 38 26 14 .... - 29 0 0 37 21 51 11 38 31.4 2 32 30 36 0 1 38 44 1 35 0 37 39 44 6 -0.13 - 28 0 0 38 38 50 11 38 32.0 4 32 30 37 18 6 39 59 54 36 19 29 40 59 8 -0.12 - 27 0 0 39 53 4 11 38 33.0 5 33 29 38 33 27 41 12 59 37 35 38 42 11 24 -0.11 - 26 0 0 41 4 34 11 38 34.2 6 34 29 39 46 5 42 23 20 38 49 5 43 20 54 -0.11 - 25 0 0 42 13 24 11 38 35.6 8 34 29 40 56 2 43 31 1 39 59 52 44 27 43 -0.11 - 24 0 0 43 19 36 11 38 37.3 9 35 28 42 3 23 44 36 4 41 8 1 45 31 55 -0.10 - 23 0 0 44 23 15 11 38 39.1 10 36 28 43 8 10 45 38 34 42 13 37 46 33 34 -0.10 - 22 0 0 45 24 24 11 38 41.2 12 36 27 44 10 27 46 38 34 43 16 43 47 32 44 -0.10 - 21 0 0 46 23 8 11 38 43.3 13 37 27 45 10 19 47 36 11 44 17 23 48 29 31 -0.10 - 20 0 0 47 19 32 11 38 45.6 14 38 26 46 7 49 48 31 27 45 15 42 49 23 58 -0.10 - 19 0 0 48 13 40 11 38 48.0 15 39 26 47 3 2 49 24 29 46 11 42 50 16 11 -0.10 - 18 0 0 49 5 37 11 38 50.5 16 39 26 47 56 3 50 15 21 47 5 30 51 6 15 -0.10 - 17 0 0 49 55 28 11 38 53.0 17 40 25 48 46 57 51 4 8 47 57 9 51 54 15 -0.10 - 16 0 0 50 43 16 11 38 55.7 18 41 25 49 35 48 51 50 54 48 46 45 52 40 16 -0.10 - 15 0 0 51 29 8 11 38 58.4 19 42 24 50 22 40 52 35 45 49 34 21 53 24 22 -0.09 - 14 0 0 52 13 8 11 39 1.1 20 43 24 51 7 39 53 18 45 50 20 2 54 6 38 -0.09 - 13 0 0 52 55 19 11 39 3.9 21 43 24 51 50 48 53 59 58 51 3 53 54 47 9 -0.09 - 12 0 0 53 35 47 11 39 6.7 22 44 23 52 32 12 54 39 29 51 45 57 55 25 58 -0.09 - 11 0 0 54 14 35 11 39 9.5 23 45 23 53 11 55 55 17 23 52 26 20 56 3 11 -0.09 - 10 0 0 54 51 49 11 39 12.3 24 46 22 53 50 1 55 53 43 53 5 5 56 38 52 -0.09 - 9 0 0 55 27 30 11 39 15.2 25 47 22 54 26 34 56 28 33 53 42 15 57 13 4 -0.09 - 8 0 0 56 1 45 11 39 18.1 26 47 22 55 1 39 57 1 56 54 17 56 57 45 51 -0.09 - 7 0 0 56 34 35 11 39 20.9 26 48 21 55 35 17 57 33 58 54 52 10 58 17 17 -0.09 - 6 0 0 57 6 5 11 39 23.8 27 49 21 56 7 34 58 4 40 55 25 1 58 47 25 -0.09 - 5 0 0 57 36 17 11 39 26.6 28 50 21 56 38 32 58 34 7 55 56 32 59 16 18 -0.09 - 4 0 0 58 5 16 11 39 29.5 29 51 20 57 8 15 59 2 22 56 26 47 59 44 0 -0.09 - 3 0 0 58 33 4 11 39 32.3 29 52 20 57 36 46 59 29 27 56 55 48 60 10 34 -0.09 - 2 0 0 58 59 44 11 39 35.2 30 53 20 58 4 6 59 55 25 57 23 39 60 36 2 -0.09 - 1 0 0 59 25 18 11 39 38.0 31 54 19 58 30 21 60 20 20 57 50 22 61 0 27 -0.09 0 0 0 59 49 50 11 39 40.8 31 54 19 58 55 31 60 44 13 58 16 0 61 23 52 -0.09 1 0 0 60 13 21 11 39 43.6 32 55 19 59 19 39 61 7 7 58 40 35 61 46 19 -0.09 2 0 0 60 35 55 11 39 46.4 33 56 18 59 42 49 61 29 5 59 4 11 62 7 50 -0.09 3 0 0 60 57 33 11 39 49.1 33 57 18 60 5 1 61 50 8 59 26 48 62 28 28 -0.08 4 0 0 61 18 17 11 39 51.9 34 58 18 60 26 19 62 10 19 59 48 30 62 48 15 -0.08 5 0 0 61 38 10 11 39 54.6 34 59 18 60 46 44 62 29 40 60 9 19 63 7 12 -0.08 6 0 0 61 57 14 11 39 57.4 35 60 17 61 6 18 62 48 12 60 29 15 63 25 22 -0.08 7 0 0 62 15 29 11 40 0.1 35 61 17 61 25 4 63 5 58 60 48 22 63 42 46 -0.08 8 0 0 62 32 59 11 40 2.7 36 62 17 61 43 2 63 22 59 61 6 41 63 59 26 -0.08 9 0 0 62 49 44 11 40 5.4 37 63 16 62 0 15 63 39 17 61 24 14 64 15 24 -0.08 10 0 0 63 5 46 11 40 8.1 37 64 16 62 16 43 63 54 53 61 41 2 64 30 40 -0.08 11 0 0 63 21 7 11 40 10.7 38 64 16 62 32 30 64 9 48 61 57 7 64 45 17 -0.08 12 0 0 63 35 48 11 40 13.3 38 65 16 62 47 35 64 24 5 62 12 29 64 59 16 -0.08 13 0 0 63 49 50 11 40 16.0 39 66 15 63 2 0 64 37 43 62 27 12 65 12 37 -0.08 14 0 0 64 3 15 11 40 18.6 39 67 15 63 15 47 64 50 45 62 41 15 65 25 23 -0.08 15 0 0 64 16 3 11 40 21.1 40 68 15 63 28 57 65 3 12 62 54 40 65 37 34 -0.08 16 0 0 64 28 16 11 40 23.7 40 69 14 63 41 30 65 15 4 63 7 28 65 49 11 -0.08 17 0 0 64 39 54 11 40 26.3 41 70 14 63 53 28 65 26 23 63 19 41 66 0 16 -0.08 18 0 0 64 51 0 11 40 28.8 41 71 14 64 4 52 65 37 10 63 31 18 66 10 49 -0.08 19 0 0 65 1 33 11 40 31.4 41 72 14 64 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41 23 43 45 52 58 -0.09 111 0 0 42 30 4 11 47 10.2 82 290 -18 41 10 52 43 49 24 40 13 15 44 47 16 -0.08 112 0 0 41 18 59 11 47 21.8 81 297 -19 39 58 24 42 39 43 38 59 47 43 38 36 -0.08 113 0 0 40 4 49 11 47 33.8 80 302 -20 38 42 49 41 26 57 37 43 12 42 26 53 -0.08 114 0 0 38 47 28 11 47 46.2 79 306 -20 37 24 5 40 11 2 36 23 26 41 12 1 -0.08 115 0 0 37 26 53 11 47 59.0 77 309 -21 36 2 5 38 51 52 35 0 25 39 53 54 -0.08 116 0 0 36 2 59 11 48 12.1 76 312 -22 34 36 47 37 29 23 33 34 7 38 32 26 -0.08 117 0 0 34 35 43 11 48 25.6 74 314 -23 33 8 8 36 3 30 32 4 28 37 7 36 -0.08 118 0 0 33 5 3 11 48 39.5 72 316 -24 31 36 8 34 34 13 30 31 30 35 39 19 -0.08 119 0 0 31 30 59 11 48 53.7 71 318 -25 30 0 46 33 1 29 28 55 11 34 7 34 -0.08 120 0 0 29 53 33 11 49 8.1 69 320 -26 28 22 4 31 25 20 27 15 36 32 32 22 -0.08 121 0 0 28 12 48 11 49 22.8 67 321 -27 26 40 7 29 45 47 25 32 47 30 53 43 -0.09 122 0 0 26 28 48 11 49 37.8 65 322 -28 24 55 0 28 2 55 23 46 53 29 11 43 -0.09 123 0 0 24 41 41 11 49 52.8 63 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10 11 54 7.1 10 327 -41 -24 1 32 -21 18 24 -25 0 34 -20 18 35 -0.12 149 0 0 -24 8 51 11 54 9.4 8 327 -40 -25 28 54 -22 48 25 -26 26 59 -21 49 35 -0.13 150 0 0 -25 34 33 11 54 11.1 6 326 -40 -26 53 18 -24 15 27 -27 50 27 -23 17 35 -0.14 151 0 0 -26 57 19 11 54 12.4 5 326 -40 -28 14 48 -25 39 31 -29 11 1 -24 42 37 -0.15 152 0 0 -28 17 12 11 54 13.3 3 326 -40 -29 33 25 -27 0 41 -30 28 44 -26 4 44 -0.17 153 0 0 -29 34 15 11 54 13.8 2 325 -39 -30 49 14 -28 18 59 .. .. .. -27 23 58 -0.23 154 0 0 -30 48 32 11 54 14.0 0 325 -39 .. .. .. -29 34 30 .. .. .. -28 40 23 -1.54 155 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -29 54 3 .... Uncertainty in time = +/- 5 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 2892-00363-1 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 32 28.5752 DE: +44 23 09.380 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 32 28.5749 DE: +44 23 09.379 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (911) Agamemnon asteroid class: approx. diameter [km]: 157 approx. diameter ["]: 0.046 distance from Earth [AU]: 4.66730 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#113 date of fit: 2023 Feb 07 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): 0.019", 0.005", 80.085° remarks: * orbital elements for (911)Agamemnon : Mean anomaly = 21.5872684241 deg Arg. of pericenter = 81.4884254614 deg Long. of node = 338.0079992229 deg Inclination = 21.7618475734 deg Eccentricity = 0.0675649942 Semimajor axis = 5.2823188355 AU Perihelion dist = 4.9254189942 AU Mag: H = 7.99, G = 0.15 Epoch of elements : MJD 59995.49069445 TDT (2023 Feb 20.4907) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1132023Feb07,11.68,2023,2,20,11.773010,0.056482,0.046453,4.894102,-5.823674,0.006019,0.000471,0.000000,0.000001 101.7800,44.4374,6.83,-10.92,False TYC 2892-00363-1,4.54127089,44.3859388,0.00,9.53,0.00,0.0,0,,4.56867776,44.4374319,5.99,0.00,0,0,0 911,Agamemnon,15.52,157.4,4.6673,0,0,0.861,-10.97,,7.8,0 0,21.5474,2023,2,20,81.4884,338.0080,21.7618,0.06756,5.28232,4.92542,8.00,5.0,0.15 1.364,0.0193,0.0053,80,0.0169,Known errors,-1.00,-1,-1,-1 20230220_0363-1,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org