IOTA/IOTA-ES occultation update for (2836) Sobolev / TYC 593-00797-1 event on 2024 Dec 15, 00:45 UT Visible from Summary ------- On 2024 Dec 15 UT, the 19.559 km diameter asteroid (2836) Sobolev will occult a 10.1 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.94 mag to 17.01 mag (the magnitude of the asteroid) for at most 1.480 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: 93 * date and approx. time of event: 2024 Dec 15, 00:36 - 2024 Dec 15, 00:53 * geocentric midpoint of event [JD]: 2460659.53131234 * magnitude of target star: 10.07 * magnitude drop [mag]: 6.94 * estimated maximum duration [s]: 1.480 * Moon: 100 % sunlit, 77° distance * Sun: 97° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 56°) * approx speed of asteroid's shadow [km/s]: 13.2343 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 593-00797-1 by 2836 Sobolev on 2024 Dec 15 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 177 0 0 -15 49 29 0 37 7.8 0 84 80 -15 54 52 -15 44 5 -15 59 58 -15 38 59 .... 178 0 0 -15 43 8 0 37 7.9 1 84 79 -15 48 31 -15 37 44 -15 53 37 -15 32 37 -0.12 179 0 0 -15 36 21 0 37 8.2 2 83 78 -15 41 45 -15 30 57 -15 46 51 -15 25 50 -0.13 -180 0 0 -15 29 9 0 37 8.6 3 83 77 -15 34 33 -15 23 45 -15 39 40 -15 18 37 -0.14 -179 0 0 -15 21 31 0 37 9.1 4 83 76 -15 26 55 -15 16 7 -15 32 3 -15 10 59 -0.14 -178 0 0 -15 13 28 0 37 9.8 5 83 76 -15 18 52 -15 8 3 -15 24 0 -15 2 55 -0.14 -177 0 0 -15 4 59 0 37 10.6 6 82 75 -15 10 24 -14 59 34 -15 15 32 -14 54 26 -0.14 -176 0 0 -14 56 4 0 37 11.5 7 82 74 -15 1 30 -14 50 39 -15 6 38 -14 45 30 -0.14 -175 0 0 -14 46 44 0 37 12.6 8 82 73 -14 52 10 -14 41 18 -14 57 19 -14 36 9 -0.15 -174 0 0 -14 36 58 0 37 13.9 9 82 72 -14 42 25 -14 31 32 -14 47 34 -14 26 23 -0.15 -173 0 0 -14 26 47 0 37 15.3 10 81 71 -14 32 13 -14 21 20 -14 37 23 -14 16 10 -0.15 -172 0 0 -14 16 10 0 37 16.8 11 81 70 -14 21 37 -14 10 43 -14 26 47 -14 5 33 -0.15 -171 0 0 -14 5 7 0 37 18.5 12 81 69 -14 10 35 -13 59 40 -14 15 45 -13 54 29 -0.15 -170 0 0 -13 53 39 0 37 20.3 13 81 68 -13 59 7 -13 48 11 -14 4 17 -13 43 0 -0.15 -169 0 0 -13 41 45 0 37 22.3 14 80 67 -13 47 13 -13 36 16 -13 52 24 -13 31 5 -0.15 -168 0 0 -13 29 25 0 37 24.5 15 80 66 -13 34 54 -13 23 56 -13 40 6 -13 18 45 -0.15 -167 0 0 -13 16 40 0 37 26.8 16 80 65 -13 22 10 -13 11 11 -13 27 22 -13 5 59 -0.15 -166 0 0 -13 3 30 0 37 29.2 17 80 65 -13 9 0 -12 58 0 -13 14 12 -12 52 47 -0.15 -165 0 0 -12 49 54 0 37 31.8 18 80 64 -12 55 24 -12 44 24 -13 0 38 -12 39 10 -0.15 -164 0 0 -12 35 53 0 37 34.5 19 79 63 -12 41 24 -12 30 22 -12 46 37 -12 25 8 -0.15 -163 0 0 -12 21 26 0 37 37.4 20 79 62 -12 26 58 -12 15 55 -12 32 12 -12 10 40 -0.15 -162 0 0 -12 6 34 0 37 40.5 21 79 61 -12 12 6 -12 1 2 -12 17 21 -11 55 47 -0.15 -161 0 0 -11 51 18 0 37 43.7 22 79 60 -11 56 50 -11 45 45 -12 2 5 -11 40 29 -0.15 -160 0 0 -11 35 36 0 37 47.0 23 79 59 -11 41 9 -11 30 2 -11 46 24 -11 24 46 -0.15 -159 0 0 -11 19 29 0 37 50.5 24 78 58 -11 25 2 -11 13 55 -11 30 19 -11 8 38 -0.15 -158 0 0 -11 2 57 0 37 54.2 25 78 57 -11 8 31 -10 57 22 -11 13 48 -10 52 5 -0.15 -157 0 0 -10 46 0 0 37 58.0 26 78 56 -10 51 35 -10 40 25 -10 56 53 -10 35 8 -0.15 -156 0 0 -10 28 39 0 38 2.0 27 78 54 -10 34 15 -10 23 4 -10 39 33 -10 17 45 -0.15 -155 0 0 -10 10 54 0 38 6.1 28 78 53 -10 16 30 -10 5 18 -10 21 48 - 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34 0 0 32 17 2 0 52 18.2 24 261 -70 32 11 40 32 22 24 32 6 35 32 27 30 -0.14 - 33 0 0 32 21 37 0 52 21.1 23 262 -71 32 16 15 32 26 59 32 11 10 32 32 4 -0.14 - 32 0 0 32 25 49 0 52 24.0 23 262 -72 32 20 28 32 31 11 32 15 23 32 36 16 -0.14 - 31 0 0 32 29 38 0 52 26.7 22 263 -73 32 24 17 32 35 0 32 19 12 32 40 5 -0.14 - 30 0 0 32 33 4 0 52 29.4 21 263 -73 32 27 43 32 38 26 32 22 38 32 43 30 -0.14 - 29 0 0 32 36 7 0 52 31.9 20 264 -74 32 30 46 32 41 28 32 25 42 32 46 33 -0.14 - 28 0 0 32 38 48 0 52 34.4 19 264 -75 32 33 26 32 44 9 32 28 22 32 49 13 -0.14 - 27 0 0 32 41 5 0 52 36.7 18 265 -75 32 35 44 32 46 26 32 30 40 32 51 30 -0.14 - 26 0 0 32 43 0 0 52 38.9 18 266 -76 32 37 39 32 48 21 32 32 35 32 53 25 -0.14 - 25 0 0 32 44 32 0 52 41.1 17 266 -77 32 39 11 32 49 53 32 34 7 32 54 57 -0.14 - 24 0 0 32 45 41 0 52 43.1 16 267 -77 32 40 20 32 51 2 32 35 16 32 56 6 -0.14 - 23 0 0 32 46 27 0 52 45.0 15 267 -78 32 41 7 32 51 48 32 36 3 32 56 52 -0.14 - 22 0 0 32 46 51 0 52 46.8 14 268 -78 32 41 31 32 52 12 32 36 27 32 57 16 -0.15 - 21 0 0 32 46 53 0 52 48.5 13 268 -79 32 41 32 32 52 14 32 36 28 32 57 18 -0.15 - 20 0 0 32 46 32 0 52 50.1 12 269 -79 32 41 11 32 51 52 32 36 7 32 56 57 -0.15 - 19 0 0 32 45 48 0 52 51.6 12 269 -80 32 40 27 32 51 9 32 35 23 32 56 13 -0.15 - 18 0 0 32 44 41 0 52 53.0 11 270 -80 32 39 21 32 50 2 32 34 16 32 55 7 -0.15 - 17 0 0 32 43 13 0 52 54.3 10 270 -80 32 37 52 32 48 34 32 32 48 32 53 38 -0.15 - 16 0 0 32 41 21 0 52 55.5 9 271 -80 32 36 0 32 46 43 32 30 56 32 51 47 -0.15 - 15 0 0 32 39 8 0 52 56.6 8 272 -80 32 33 47 32 44 29 32 28 42 32 49 34 -0.15 - 14 0 0 32 36 32 0 52 57.5 7 272 -81 32 31 10 32 41 53 32 26 6 32 46 58 -0.15 - 13 0 0 32 33 33 0 52 58.4 7 273 -80 32 28 12 32 38 55 32 23 7 32 44 0 -0.16 - 12 0 0 32 30 12 0 52 59.2 6 273 -80 32 24 51 32 35 34 32 19 46 32 40 39 -0.16 - 11 0 0 32 26 29 0 52 59.8 5 274 -80 32 21 7 32 31 51 32 16 2 32 36 56 -0.16 - 10 0 0 32 22 23 0 53 0.4 4 274 -80 32 17 1 32 27 45 32 11 56 32 32 51 -0.17 - 9 0 0 32 17 55 0 53 0.8 3 275 -80 32 12 33 32 23 18 32 7 28 32 28 23 -0.17 - 8 0 0 32 13 5 0 53 1.2 2 275 -79 32 7 43 32 18 28 32 2 37 32 23 33 -0.19 - 7 0 0 32 7 52 0 53 1.4 1 276 -79 32 2 30 32 13 15 31 57 24 32 18 21 -0.22 - 6 0 0 32 2 17 0 53 1.5 1 276 -78 31 56 54 32 7 40 31 51 48 32 12 47 -0.33 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 593-00797-1 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 23 52 53.8205 DE: +05 32 53.980 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 23 52 53.8202 DE: +05 32 53.978 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.1 * B mag [mag]: 10.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2836) Sobolev asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.010 distance from Earth [AU]: 2.59880 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.021", 0.003", 56.163° remarks: * orbital elements for (2836)Sobolev : Mean anomaly = 62.2333900867 deg Arg. of pericenter = 320.7775061129 deg Long. of node = 348.0484632463 deg Inclination = 9.6590497822 deg Eccentricity = 0.0909677535 Semimajor axis = 3.0009235944 AU Perihelion dist = 2.7279363167 AU Mag: H = 11.64, G = 0.15 Epoch of elements : MJD 60659.03131234 TDT (2024 Dec 15.0313) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.48,2024,12,15,0.751496,-0.055944,0.128709,6.829150,3.026704,0.005431,0.002281,0.000000,0.000000 -96.9031,5.6878,167.51,-23.28,False TYC 593-00797-1,23.88161682,5.5483278,10.10,10.07,10.05,0.0,0,,23.90290015,5.6878237,6.94,6.51,0,0,0 2836,Sobolev,17.01,19.559,2.5988,0,0,1.549,10.25,,1.4,0 0,62.0379,2024,12,14,320.7775,348.0485,9.6590,0.09097,3.00092,2.72794,11.64,5.0,0.15 1.474,0.0213,0.0033,56,0.0049,Known errors,1.23,0,-1,-1 20241215_0797-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org