IOTA/IOTA-ES occultation update for (1271) Isergina / UCAC4 361-117317 event on 2024 Mar 10, 07:31 UT Visible from Summary ------- On 2024 Mar 10 UT, the 49.8798404199662 km diameter asteroid (1271) Isergina will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.80 mag to 16.69 mag (the magnitude of the asteroid) for at most 2.620 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 Mar 10, 07:25 - 2024 Mar 10, 07:37 * geocentric midpoint of event [JD]: 2460379.81355341 * magnitude of target star: 11.90 * magnitude drop [mag]: 4.80 * estimated maximum duration [s]: 2.620 * Moon: 0 % sunlit, 83° distance * Sun: 83° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.003", 97°) * approx speed of asteroid's shadow [km/s]: 19.1427 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 361-117317 by 1271 Isergina on 2024 Mar 10 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 -103 0 0 - 1 51 11 7 25 57.9 0 108 -82 - 2 5 29 - 1 36 54 - 2 10 52 .. .. .. .... -102 0 0 - 2 10 35 7 25 58.0 1 108 -81 - 2 24 52 - 1 56 18 - 2 30 15 - 1 50 54 0.09 -101 0 0 - 2 29 54 7 25 58.2 2 108 -80 - 2 44 11 - 2 15 37 - 2 49 34 - 2 10 14 0.04 -100 0 0 - 2 49 9 7 25 58.4 3 108 -79 - 3 3 25 - 2 34 52 - 3 8 49 - 2 29 29 0.02 - 99 0 0 - 3 8 18 7 25 58.8 4 108 -78 - 3 22 34 - 2 54 2 - 3 27 57 - 2 48 39 0.01 - 98 0 0 - 3 27 22 7 25 59.4 5 108 -77 - 3 41 38 - 3 13 6 - 3 47 1 - 3 7 43 0.00 - 97 0 0 - 3 46 20 7 26 0.0 6 108 -76 - 4 0 35 - 3 32 5 - 4 5 58 - 3 26 42 0.00 - 96 0 0 - 4 5 11 7 26 0.7 7 107 -75 - 4 19 26 - 3 50 56 - 4 24 49 - 3 45 34 0.00 - 95 0 0 - 4 23 56 7 26 1.6 8 107 -74 - 4 38 11 - 4 9 42 - 4 43 33 - 4 4 19 -0.01 - 94 0 0 - 4 42 34 7 26 2.5 10 107 -73 - 4 56 48 - 4 28 20 - 5 2 10 - 4 22 57 -0.01 - 93 0 0 - 5 1 4 7 26 3.6 11 107 -72 - 5 15 17 - 4 46 50 - 5 20 39 - 4 41 28 -0.01 - 92 0 0 - 5 19 26 7 26 4.7 12 107 -71 - 5 33 39 - 5 5 13 - 5 39 1 - 4 59 50 -0.01 - 91 0 0 - 5 37 39 7 26 6.0 13 107 -70 - 5 51 52 - 5 23 27 - 5 57 13 - 5 18 5 -0.01 - 90 0 0 - 5 55 44 7 26 7.4 14 107 -69 - 6 9 56 - 5 41 32 - 6 15 17 - 5 36 10 -0.01 - 89 0 0 - 6 13 40 7 26 8.9 15 107 -68 - 6 27 51 - 5 59 28 - 6 33 12 - 5 54 7 -0.01 - 88 0 0 - 6 31 26 7 26 10.5 16 107 -67 - 6 45 36 - 6 17 15 - 6 50 58 - 6 11 54 -0.01 - 87 0 0 - 6 49 2 7 26 12.2 17 107 -66 - 7 3 12 - 6 34 52 - 7 8 33 - 6 29 31 -0.01 - 86 0 0 - 7 6 28 7 26 14.0 18 107 -65 - 7 20 37 - 6 52 18 - 7 25 58 - 6 46 58 -0.01 - 85 0 0 - 7 23 43 7 26 15.9 19 106 -64 - 7 37 52 - 7 9 34 - 7 43 13 - 7 4 14 -0.01 - 84 0 0 - 7 40 48 7 26 17.9 20 106 -63 - 7 54 56 - 7 26 40 - 8 0 16 - 7 21 19 -0.02 - 83 0 0 - 7 57 41 7 26 20.0 21 106 -61 - 8 11 49 - 7 43 33 - 8 17 8 - 7 38 13 -0.02 - 82 0 0 - 8 14 23 7 26 22.2 22 106 -60 - 8 28 29 - 8 0 16 - 8 33 49 - 7 54 56 -0.02 - 81 0 0 - 8 30 52 7 26 24.6 23 106 -59 - 8 44 58 - 8 16 46 - 8 50 18 - 8 11 26 -0.02 - 80 0 0 - 8 47 10 7 26 27.0 24 106 -58 - 9 1 15 - 8 33 4 - 9 6 34 - 8 27 45 -0.02 - 79 0 0 - 9 3 14 7 26 29.5 25 106 -57 - 9 17 19 - 8 49 10 - 9 22 38 - 8 43 51 -0.02 - 78 0 0 - 9 19 6 7 26 32.1 26 105 -56 - 9 33 10 - 9 5 2 - 9 38 29 - 8 59 44 -0.02 - 77 0 0 - 9 34 45 7 26 34.8 27 105 -55 - 9 48 48 - 9 20 42 - 9 54 7 - 9 15 23 -0.02 - 76 0 0 - 9 50 10 7 26 37.5 28 105 -54 -10 4 13 - 9 36 8 -10 9 31 - 9 30 50 -0.02 - 75 0 0 -10 5 22 7 26 40.4 29 105 -53 -10 19 24 - 9 51 20 -10 24 41 - 9 46 2 -0.02 - 74 0 0 -10 20 19 7 26 43.4 30 105 -52 -10 34 20 -10 6 18 -10 39 38 -10 1 1 -0.02 - 73 0 0 -10 35 3 7 26 46.4 31 105 -51 -10 49 3 -10 21 2 -10 54 20 -10 15 45 -0.02 - 72 0 0 -10 49 31 7 26 49.6 32 104 -50 -11 3 31 -10 35 32 -11 8 48 -10 30 15 -0.02 - 71 0 0 -11 3 45 7 26 52.8 33 104 -49 -11 17 44 -10 49 47 -11 23 1 -10 44 30 -0.02 - 70 0 0 -11 17 44 7 26 56.1 34 104 -48 -11 31 42 -11 3 46 -11 36 58 -10 58 30 -0.02 - 69 0 0 -11 31 28 7 26 59.5 35 104 -47 -11 45 25 -11 17 31 -11 50 41 -11 12 15 -0.02 - 68 0 0 -11 44 56 7 27 3.0 36 104 -46 -11 58 52 -11 31 0 -12 4 8 -11 25 44 -0.02 - 67 0 0 -11 58 9 7 27 6.5 37 103 -45 -12 12 4 -11 44 13 -12 17 20 -11 38 57 -0.02 - 66 0 0 -12 11 5 7 27 10.2 38 103 -44 -12 25 0 -11 57 10 -12 30 15 -11 51 55 -0.02 - 65 0 0 -12 23 45 7 27 13.9 39 103 -43 -12 37 40 -12 9 51 -12 42 54 -12 4 36 -0.02 - 64 0 0 -12 36 10 7 27 17.7 40 103 -42 -12 50 3 -12 22 16 -12 55 17 -12 17 2 -0.02 - 63 0 0 -12 48 17 7 27 21.5 41 103 -41 -13 2 10 -12 34 25 -13 7 24 -12 29 10 -0.02 - 62 0 0 -13 0 8 7 27 25.5 42 102 -40 -13 14 0 -12 46 16 -13 19 14 -12 41 2 -0.02 - 61 0 0 -13 11 42 7 27 29.5 43 102 -39 -13 25 33 -12 57 51 -13 30 47 -12 52 37 -0.02 - 60 0 0 -13 22 59 7 27 33.5 44 102 -38 -13 36 49 -13 9 8 -13 42 3 -13 3 55 -0.02 - 59 0 0 -13 33 59 7 27 37.7 45 102 -37 -13 47 48 -13 20 9 -13 53 1 -13 14 56 -0.02 - 58 0 0 -13 44 41 7 27 41.9 46 102 -36 -13 58 30 -13 30 52 -14 3 43 -13 25 39 -0.02 - 57 0 0 -13 55 6 7 27 46.1 47 101 -35 -14 8 54 -13 41 17 -14 14 6 -13 36 5 -0.02 - 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6 36 43 7 35 56.3 37 253 59 - 6 50 54 - 6 22 31 - 6 56 15 - 6 17 10 -0.02 39 0 0 - 6 18 50 7 35 59.9 36 252 60 - 6 33 2 - 6 4 38 - 6 38 24 - 5 59 17 -0.02 40 0 0 - 6 0 48 7 36 3.5 35 252 61 - 6 15 1 - 5 46 36 - 6 20 22 - 5 41 14 -0.02 41 0 0 - 5 42 37 7 36 7.0 34 252 63 - 5 56 50 - 5 28 24 - 6 2 12 - 5 23 2 -0.02 42 0 0 - 5 24 16 7 36 10.3 33 252 64 - 5 38 30 - 5 10 2 - 5 43 52 - 5 4 40 -0.02 43 0 0 - 5 5 47 7 36 13.6 32 252 65 - 5 20 1 - 4 51 33 - 5 25 23 - 4 46 10 -0.02 44 0 0 - 4 47 9 7 36 16.8 31 252 66 - 5 1 24 - 4 32 54 - 5 6 46 - 4 27 32 -0.02 45 0 0 - 4 28 23 7 36 19.9 30 252 67 - 4 42 38 - 4 14 8 - 4 48 1 - 4 8 45 -0.02 46 0 0 - 4 9 30 7 36 23.0 29 252 68 - 4 23 46 - 3 55 15 - 4 29 9 - 3 49 52 -0.02 47 0 0 - 3 50 30 7 36 25.9 28 252 69 - 4 4 46 - 3 36 14 - 4 10 9 - 3 30 51 -0.02 48 0 0 - 3 31 23 7 36 28.7 27 252 70 - 3 45 40 - 3 17 7 - 3 51 3 - 3 11 43 -0.02 49 0 0 - 3 12 10 7 36 31.4 26 252 71 - 3 26 27 - 2 57 53 - 3 31 50 - 2 52 30 -0.02 50 0 0 - 2 52 51 7 36 34.0 25 252 72 - 3 7 8 - 2 38 34 - 3 12 32 - 2 33 10 -0.02 51 0 0 - 2 33 27 7 36 36.5 23 252 73 - 2 47 45 - 2 19 10 - 2 53 8 - 2 13 46 -0.02 52 0 0 - 2 13 58 7 36 38.9 22 252 74 - 2 28 16 - 1 59 40 - 2 33 40 - 1 54 16 -0.02 53 0 0 - 1 54 24 7 36 41.2 21 252 75 - 2 8 42 - 1 40 6 - 2 14 6 - 1 34 42 -0.02 54 0 0 - 1 34 47 7 36 43.4 20 252 75 - 1 49 5 - 1 20 28 - 1 54 29 - 1 15 4 -0.01 55 0 0 - 1 15 5 7 36 45.5 19 252 76 - 1 29 24 - 1 0 47 - 1 34 48 - 0 55 23 -0.01 56 0 0 - 0 55 21 7 36 47.4 18 252 77 - 1 9 40 - 0 41 2 - 1 15 4 - 0 35 38 -0.01 57 0 0 - 0 35 34 7 36 49.3 17 252 78 - 0 49 53 - 0 21 15 - 0 55 17 - 0 15 50 -0.01 58 0 0 - 0 15 44 7 36 51.1 16 251 79 - 0 30 3 - 0 1 25 - 0 35 28 0 3 59 -0.01 59 0 0 0 4 7 7 36 52.7 15 251 80 - 0 10 12 0 18 26 - 0 15 37 0 23 51 -0.01 60 0 0 0 23 59 7 36 54.3 14 252 81 0 9 40 0 38 19 0 4 16 0 43 43 -0.01 61 0 0 0 43 53 7 36 55.7 13 252 81 0 29 34 0 58 12 0 24 9 1 3 37 -0.01 62 0 0 1 3 47 7 36 57.0 12 252 82 0 49 27 1 18 6 0 44 3 1 23 31 -0.01 63 0 0 1 23 41 7 36 58.2 11 252 83 1 9 21 1 38 0 1 3 57 1 43 24 -0.01 64 0 0 1 43 34 7 36 59.3 10 252 83 1 29 15 1 57 53 1 23 50 2 3 18 -0.01 65 0 0 2 3 27 7 37 0.3 9 252 83 1 49 7 2 17 46 1 43 43 2 23 10 -0.01 66 0 0 2 23 18 7 37 1.1 8 252 83 2 8 59 2 37 37 2 3 34 2 43 1 -0.01 67 0 0 2 43 7 7 37 1.9 7 252 83 2 28 48 2 57 26 2 23 24 3 2 51 0.00 68 0 0 3 2 54 7 37 2.5 5 252 83 2 48 35 3 17 13 2 43 11 3 22 37 0.00 69 0 0 3 22 39 7 37 3.1 4 252 83 3 8 20 3 36 57 3 2 56 3 42 22 0.00 70 0 0 3 42 20 7 37 3.5 3 252 82 3 28 2 3 56 39 3 22 38 4 2 3 0.01 71 0 0 4 1 58 7 37 3.8 2 252 82 3 47 40 4 16 16 3 42 16 4 21 40 0.03 72 0 0 4 21 32 7 37 4.0 1 252 81 4 7 14 4 35 50 4 1 50 4 41 14 0.06 73 0 0 4 41 1 7 37 4.0 0 252 80 4 26 44 4 55 19 4 21 20 5 0 43 0.45 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 361-117317 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 48 29.4604 DE: -17 49 19.180 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 48 29.4605 DE: -17 49 19.180 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1271) Isergina asteroid class: approx. diameter [km]: 50 approx. diameter ["]: 0.020 distance from Earth [AU]: 3.43540 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 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): 0.016", 0.003", 96.9° remarks: * orbital elements for (1271)Isergina : Mean anomaly = 219.1193043232 deg Arg. of pericenter = 272.2851563025 deg Long. of node = 126.8154989698 deg Inclination = 6.6822034473 deg Eccentricity = 0.1211117064 Semimajor axis = 3.1411517480 AU Perihelion dist = 2.7607214999 AU Mag: H = 10.43, G = 0.15 Epoch of elements : MJD 60379.31355317 TDT (2024 Mar 10.3136) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,2.62,2024,3,10,7.525282,-0.001451,0.026559,10.785285,0.647329,-0.005949,0.000182,0.000000,0.000000 -13.8757,-17.8315,69.67,-3.87,False UCAC4 361-117317,17.80818342,-17.8219944,12.73,11.90,11.45,0.1,0,,17.83158449,-17.8314566,4.80,4.80,0,0,0 1271,Isergina,16.69,50.129,3.4354,0,0,1.934,1.66,,2.2,0 0,219.0638,2024,3,10,272.2852,126.8155,6.6822,0.12111,3.14115,2.76072,10.43,5.0,0.15 1.189,0.0160,0.0025,97,0.0038,Known errors,1.32,0,-1,-1 20240310_117317,60139.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org