IOTA/IOTA-ES occultation update for (5471) Tunguska / HIP 93869 event on 2024 Mar 03, 04:05 UT Visible from Summary ------- On 2024 Mar 03 UT, the 17.2080441772498 km diameter asteroid (5471) Tunguska will occult a 8.5 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 8.87 mag to 17.33 mag (the magnitude of the asteroid) for at most 0.510 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 03, 04:01 - 2024 Mar 03, 04:08 * geocentric midpoint of event [JD]: 2460372.67022713 * magnitude of target star: 8.46 * magnitude drop [mag]: 8.87 * estimated maximum duration [s]: 0.510 * Moon: 54 % sunlit, 39° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 75°) * approx speed of asteroid's shadow [km/s]: 34.4451 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 93869 by 5471 Tunguska on 2024 Mar 3 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 - 27 0 0 - 8 41 28 4 2 2.9 1 110 -56 - 8 46 34 - 8 36 21 - 8 47 44 - 8 35 11 .... - 26 0 0 - 9 3 1 4 2 3.0 2 110 -55 - 9 8 7 - 8 57 55 - 9 9 18 - 8 56 45 0.01 - 25 0 0 - 9 24 18 4 2 3.2 3 110 -54 - 9 29 24 - 9 19 12 - 9 30 34 - 9 18 2 -0.02 - 24 0 0 - 9 45 17 4 2 3.4 4 110 -53 - 9 50 22 - 9 40 11 - 9 51 32 - 9 39 1 -0.03 - 23 0 0 -10 5 58 4 2 3.6 5 109 -52 -10 11 3 -10 0 53 -10 12 12 - 9 59 43 -0.04 - 22 0 0 -10 26 20 4 2 4.0 6 109 -51 -10 31 25 -10 21 16 -10 32 34 -10 20 6 -0.04 - 21 0 0 -10 46 24 4 2 4.4 7 109 -50 -10 51 28 -10 41 20 -10 52 38 -10 40 11 -0.05 - 20 0 0 -11 6 9 4 2 4.8 8 109 -49 -11 11 13 -11 1 6 -11 12 22 -10 59 56 -0.05 - 19 0 0 -11 25 35 4 2 5.3 9 109 -48 -11 30 38 -11 20 32 -11 31 47 -11 19 22 -0.05 - 18 0 0 -11 44 41 4 2 5.9 10 108 -47 -11 49 43 -11 39 38 -11 50 53 -11 38 29 -0.05 - 17 0 0 -12 3 27 4 2 6.5 11 108 -46 -12 8 29 -11 58 25 -12 9 38 -11 57 16 -0.05 - 16 0 0 -12 21 53 4 2 7.2 12 108 -45 -12 26 55 -12 16 51 -12 28 4 -12 15 42 -0.06 - 15 0 0 -12 39 58 4 2 8.0 13 108 -44 -12 45 0 -12 34 57 -12 46 9 -12 33 48 -0.06 - 14 0 0 -12 57 43 4 2 8.8 14 108 -43 -13 2 44 -12 52 43 -13 3 53 -12 51 34 -0.06 - 13 0 0 -13 15 7 4 2 9.6 15 107 -41 -13 20 7 -13 10 7 -13 21 16 -13 8 58 -0.06 - 12 0 0 -13 32 10 4 2 10.5 16 107 -40 -13 37 10 -13 27 10 -13 38 18 -13 26 1 -0.06 - 11 0 0 -13 48 51 4 2 11.5 17 107 -39 -13 53 51 -13 43 52 -13 54 59 -13 42 43 -0.06 - 10 0 0 -14 5 11 4 2 12.5 18 107 -38 -14 10 10 -14 0 12 -14 11 18 -13 59 4 -0.06 - 9 0 0 -14 21 9 4 2 13.5 19 106 -37 -14 26 7 -14 16 11 -14 27 16 -14 15 2 -0.06 - 8 0 0 -14 36 45 4 2 14.7 20 106 -36 -14 41 43 -14 31 47 -14 42 51 -14 30 39 -0.06 - 7 0 0 -14 51 59 4 2 15.8 21 106 -35 -14 56 57 -14 47 2 -14 58 5 -14 45 53 -0.06 - 6 0 0 -15 6 51 4 2 17.0 22 106 -34 -15 11 48 -15 1 54 -15 12 56 -15 0 46 -0.06 - 5 0 0 -15 21 20 4 2 18.3 23 105 -33 -15 26 17 -15 16 23 -15 27 24 -15 15 15 -0.06 - 4 0 0 -15 35 27 4 2 19.6 24 105 -32 -15 40 23 -15 30 30 -15 41 31 -15 29 22 -0.06 - 3 0 0 -15 49 10 4 2 21.0 25 105 -31 -15 54 6 -15 44 15 -15 55 14 -15 43 7 -0.06 - 2 0 0 -16 2 31 4 2 22.4 26 105 -30 -16 7 27 -15 57 36 -16 8 34 -15 56 28 -0.06 - 1 0 0 -16 15 30 4 2 23.8 27 104 -30 -16 20 24 -16 10 34 -16 21 32 -16 9 27 -0.06 - 0 0 0 -16 28 4 4 2 25.3 28 104 -29 -16 32 59 -16 23 10 -16 34 7 -16 22 2 -0.06 1 0 0 -16 40 16 4 2 26.9 29 104 -28 -16 45 10 -16 35 22 -16 46 18 -16 34 15 -0.07 2 0 0 -16 52 5 4 2 28.5 30 104 -27 -16 56 59 -16 47 11 -16 58 6 -16 46 4 -0.07 3 0 0 -17 3 30 4 2 30.1 31 103 -26 -17 8 23 -16 58 36 -17 9 30 -16 57 29 -0.07 4 0 0 -17 14 31 4 2 31.8 32 103 -25 -17 19 25 -17 9 38 -17 20 32 -17 8 31 -0.07 5 0 0 -17 25 9 4 2 33.5 33 103 -24 -17 30 2 -17 20 17 -17 31 9 -17 19 10 -0.07 6 0 0 -17 35 24 4 2 35.3 34 103 -23 -17 40 16 -17 30 32 -17 41 23 -17 29 25 -0.07 7 0 0 -17 45 15 4 2 37.1 35 102 -22 -17 50 7 -17 40 23 -17 51 14 -17 39 16 -0.07 8 0 0 -17 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2 -0.07 96 0 0 - 5 48 33 4 6 50.8 56 243 65 - 5 53 43 - 5 43 23 - 5 54 54 - 5 42 11 -0.07 97 0 0 - 5 24 28 4 6 53.7 55 243 66 - 5 29 39 - 5 19 18 - 5 30 50 - 5 18 7 -0.07 98 0 0 - 5 0 11 4 6 56.6 54 243 67 - 5 5 22 - 4 54 59 - 5 6 33 - 4 53 48 -0.07 99 0 0 - 4 35 40 4 6 59.4 53 243 68 - 4 40 51 - 4 30 28 - 4 42 3 - 4 29 17 -0.07 100 0 0 - 4 10 57 4 7 2.2 51 243 69 - 4 16 8 - 4 5 45 - 4 17 20 - 4 4 33 -0.07 101 0 0 - 3 46 2 4 7 4.9 50 243 70 - 3 51 14 - 3 40 50 - 3 52 25 - 3 39 38 -0.07 102 0 0 - 3 20 56 4 7 7.6 49 243 71 - 3 26 8 - 3 15 43 - 3 27 20 - 3 14 32 -0.07 103 0 0 - 2 55 39 4 7 10.3 48 243 72 - 3 0 52 - 2 50 26 - 3 2 4 - 2 49 15 -0.07 104 0 0 - 2 30 13 4 7 12.9 47 243 72 - 2 35 26 - 2 25 0 - 2 36 37 - 2 23 48 -0.07 105 0 0 - 2 4 37 4 7 15.5 46 243 73 - 2 9 50 - 1 59 23 - 2 11 2 - 1 58 12 -0.07 106 0 0 - 1 38 52 4 7 18.0 45 243 74 - 1 44 6 - 1 33 39 - 1 45 17 - 1 32 27 -0.07 107 0 0 - 1 12 59 4 7 20.5 44 243 75 - 1 18 13 - 1 7 46 - 1 19 25 - 1 6 34 -0.07 108 0 0 - 0 46 59 4 7 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0 0 5 23 43 4 7 51.5 27 244 78 5 18 28 5 28 58 5 17 15 5 30 10 -0.06 123 0 0 5 50 12 4 7 53.1 26 244 77 5 44 57 5 55 28 5 43 45 5 56 40 -0.06 124 0 0 6 16 39 4 7 54.6 25 244 77 6 11 24 6 21 54 6 10 12 6 23 6 -0.06 125 0 0 6 43 1 4 7 56.1 24 245 76 6 37 46 6 48 16 6 36 34 6 49 28 -0.06 126 0 0 7 9 18 4 7 57.5 23 245 75 7 4 4 7 14 33 7 2 52 7 15 45 -0.06 127 0 0 7 35 30 4 7 58.9 22 245 75 7 30 16 7 40 45 7 29 4 7 41 57 -0.06 128 0 0 8 1 36 4 8 0.1 21 245 74 7 56 21 8 6 50 7 55 9 8 8 2 -0.06 129 0 0 8 27 35 4 8 1.3 20 245 73 8 22 20 8 32 49 8 21 8 8 34 1 -0.06 130 0 0 8 53 26 4 8 2.5 19 245 72 8 48 12 8 58 40 8 47 0 8 59 52 -0.06 131 0 0 9 19 9 4 8 3.6 18 246 71 9 13 56 9 24 23 9 12 44 9 25 35 -0.06 132 0 0 9 44 44 4 8 4.6 17 246 70 9 39 30 9 49 58 9 38 19 9 51 9 -0.06 133 0 0 10 10 10 4 8 5.6 15 246 69 10 4 56 10 15 23 10 3 45 10 16 35 -0.06 134 0 0 10 35 25 4 8 6.5 14 246 68 10 30 12 10 40 38 10 29 0 10 41 50 -0.06 135 0 0 11 0 30 4 8 7.3 13 246 68 10 55 18 11 5 43 10 54 6 11 6 55 -0.06 136 0 0 11 25 25 4 8 8.1 12 246 67 11 20 12 11 30 37 11 19 1 11 31 49 -0.06 137 0 0 11 50 8 4 8 8.8 11 247 66 11 44 55 11 55 20 11 43 44 11 56 31 -0.06 138 0 0 12 14 38 4 8 9.4 10 247 65 12 9 26 12 19 50 12 8 15 12 21 2 -0.06 139 0 0 12 38 57 4 8 10.0 9 247 64 12 33 45 12 44 8 12 32 34 12 45 19 -0.05 140 0 0 13 3 2 4 8 10.5 8 247 63 12 57 51 13 8 13 12 56 39 13 9 24 -0.05 141 0 0 13 26 53 4 8 10.9 7 248 62 13 21 42 13 32 4 13 20 31 13 33 15 -0.05 142 0 0 13 50 31 4 8 11.3 6 248 61 13 45 20 13 55 41 13 44 9 13 56 52 -0.05 143 0 0 14 13 54 4 8 11.6 5 248 60 14 8 44 14 19 4 14 7 33 14 20 15 -0.05 144 0 0 14 37 2 4 8 11.9 4 248 59 14 31 53 14 42 12 14 30 42 14 43 23 -0.04 145 0 0 14 59 55 4 8 12.0 3 249 58 14 54 46 15 5 4 14 53 35 15 6 15 -0.03 146 0 0 15 22 32 4 8 12.2 2 249 57 15 17 23 15 27 41 15 16 13 15 28 52 -0.01 147 0 0 15 44 53 4 8 12.2 1 249 56 15 39 45 15 50 2 15 38 34 15 51 12 0.06 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: HIP 93869 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 07 00.0985 DE: -19 59 06.238 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 07 00.0986 DE: -19 59 06.238 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.400) * V mag [mag]: 8.5 * B mag [mag]: 9.0 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5471) Tunguska asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.19850 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 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): 0.016", 0.001", 75.1° remarks: * orbital elements for (5471)Tunguska : Mean anomaly = 351.1152094761 deg Arg. of pericenter = 28.6161170356 deg Long. of node = 250.2317276426 deg Inclination = 9.3202618675 deg Eccentricity = 0.0715710266 Semimajor axis = 2.9977991229 AU Perihelion dist = 2.7832435621 AU Mag: H = 11.67, G = 0.15 Epoch of elements : MJD 60372.17022700 TDT (2024 Mar 03.1702) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr25,0.51,2024,3,3,4.085451,-0.015577,0.068808,18.951291,4.339444,-0.004873,-0.000428,-0.000001,0.000000 64.3913,-19.9490,121.69,-6.65,False HIP 93869,19.11669399,-19.9850662,9.02,8.46,8.16,0.2,0,,19.14016238,-19.9490319,8.87,8.73,0,0,0 5471,Tunguska,17.33,17.672,3.1985,0,0,3.696,11.94,,2.4,0 0,351.0829,2024,3,3,28.6161,250.2317,9.3203,0.07157,2.99780,2.78324,11.67,5.0,0.15 1.114,0.0163,0.0007,75,0.0009,Known errors,1.87,0,-1,-1 20240303__93869,60139.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org