IOTA/IOTA-ES occultation update for (2692) Chkalov / TYC 5744-00213-1 event on 2024 Nov 16, 23:28 UT Visible from Summary ------- On 2024 Nov 16 UT, the 15.2888182078649 km diameter asteroid (2692) Chkalov will occult a 10.3 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.72 mag to 17.98 mag (the magnitude of the asteroid) for at most 0.580 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 Nov 16, 23:24 - 2024 Nov 16, 23:31 * geocentric midpoint of event [JD]: 2460631.47781154 * magnitude of target star: 10.26 * magnitude drop [mag]: 7.72 * estimated maximum duration [s]: 0.580 * Moon: 98 % sunlit, 125° distance * Sun: 69° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 77°) * approx speed of asteroid's shadow [km/s]: 27.1059 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5744-00213-1 by 2692 Chkalov on 2024 Nov 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 160 0 0 .. .. .... .. .. .. .. .. .. -31 7 41 .. .. .. -31 10 31 .. .. .. .... 161 0 0 -31 14 24 23 24 30.4 1 102 65 -31 19 14 -31 9 33 -31 22 5 -31 6 43 .... 162 0 0 -31 25 50 23 24 30.5 2 102 66 -31 30 41 -31 21 0 -31 33 31 -31 18 10 0.41 163 0 0 -31 37 9 23 24 30.7 3 101 66 -31 42 0 -31 32 19 -31 44 50 -31 29 30 0.43 164 0 0 -31 48 21 23 24 30.9 3 101 67 -31 53 11 -31 43 31 -31 56 2 -31 40 42 0.44 165 0 0 -31 59 26 23 24 31.2 4 100 68 -32 4 16 -31 54 36 -32 7 6 -31 51 46 0.45 166 0 0 -32 10 22 23 24 31.5 5 100 68 -32 15 12 -32 5 32 -32 18 2 -32 2 43 0.45 167 0 0 -32 21 11 23 24 31.9 6 99 69 -32 26 0 -32 16 21 -32 28 50 -32 13 31 0.45 168 0 0 -32 31 51 23 24 32.3 7 98 70 -32 36 41 -32 27 2 -32 39 30 -32 24 12 0.46 169 0 0 -32 42 23 23 24 32.8 8 98 70 -32 47 13 -32 37 34 -32 50 2 -32 34 45 0.46 170 0 0 -32 52 47 23 24 33.4 9 97 71 -32 57 36 -32 47 58 -33 0 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44 0 0 -25 46 40 23 30 58.7 31 272 -26 -25 51 33 -25 41 48 -25 54 24 -25 38 57 0.48 - 43 0 0 -25 33 9 23 31 0.8 30 272 -27 -25 38 1 -25 28 17 -25 40 53 -25 25 26 0.48 - 42 0 0 -25 19 37 23 31 2.9 29 271 -27 -25 24 29 -25 14 45 -25 27 21 -25 11 54 0.49 - 41 0 0 -25 6 5 23 31 4.9 28 271 -28 -25 10 57 -25 1 12 -25 13 48 -24 58 21 0.49 - 40 0 0 -24 52 32 23 31 6.9 27 270 -29 -24 57 24 -24 47 40 -25 0 16 -24 44 49 0.49 - 39 0 0 -24 38 59 23 31 8.8 26 270 -30 -24 43 52 -24 34 7 -24 46 43 -24 31 16 0.49 - 38 0 0 -24 25 27 23 31 10.7 25 269 -31 -24 30 19 -24 20 35 -24 33 11 -24 17 44 0.49 - 37 0 0 -24 11 56 23 31 12.5 24 269 -32 -24 16 48 -24 7 4 -24 19 39 -24 4 13 0.49 - 36 0 0 -23 58 25 23 31 14.2 23 268 -32 -24 3 17 -23 53 33 -24 6 9 -23 50 42 0.49 - 35 0 0 -23 44 56 23 31 15.9 22 268 -33 -23 49 48 -23 40 4 -23 52 39 -23 37 13 0.49 - 34 0 0 -23 31 28 23 31 17.5 21 267 -34 -23 36 20 -23 26 36 -23 39 12 -23 23 45 0.49 - 33 0 0 -23 18 2 23 31 19.1 21 267 -35 -23 22 54 -23 13 11 -23 25 46 -23 10 20 0.49 - 32 0 0 -23 4 39 23 31 20.5 20 266 -36 -23 9 31 -22 59 47 -23 12 22 -22 56 56 0.49 - 31 0 0 -22 51 17 23 31 22.0 19 266 -36 -22 56 9 -22 46 26 -22 59 0 -22 43 35 0.49 - 30 0 0 -22 37 59 23 31 23.3 18 265 -37 -22 42 51 -22 33 7 -22 45 42 -22 30 16 0.49 - 29 0 0 -22 24 43 23 31 24.6 17 265 -38 -22 29 35 -22 19 52 -22 32 26 -22 17 1 0.49 - 28 0 0 -22 11 31 23 31 25.8 16 265 -39 -22 16 22 -22 6 39 -22 19 13 -22 3 49 0.50 - 27 0 0 -21 58 22 23 31 27.0 15 264 -39 -22 3 14 -21 53 31 -22 6 4 -21 50 40 0.50 - 26 0 0 -21 45 17 23 31 28.1 14 264 -40 -21 50 8 -21 40 26 -21 52 59 -21 37 35 0.50 - 25 0 0 -21 32 16 23 31 29.1 13 263 -41 -21 37 8 -21 27 25 -21 39 58 -21 24 35 0.50 - 24 0 0 -21 19 20 23 31 30.0 12 263 -42 -21 24 11 -21 14 29 -21 27 2 -21 11 38 0.50 - 23 0 0 -21 6 28 23 31 30.9 11 263 -42 -21 11 19 -21 1 37 -21 14 10 -20 58 47 0.50 - 22 0 0 -20 53 41 23 31 31.7 10 262 -43 -20 58 32 -20 48 50 -21 1 23 -20 46 0 0.51 - 21 0 0 -20 41 0 23 31 32.4 9 262 -44 -20 45 51 -20 36 9 -20 48 41 -20 33 19 0.51 - 20 0 0 -20 28 24 23 31 33.1 8 261 -44 -20 33 14 -20 23 33 -20 36 5 -20 20 43 0.51 - 19 0 0 -20 15 53 23 31 33.7 7 261 -45 -20 20 44 -20 11 3 -20 23 34 -20 8 13 0.52 - 18 0 0 -20 3 29 23 31 34.2 6 261 -46 -20 8 19 -19 58 39 -20 11 10 -19 55 49 0.53 - 17 0 0 -19 51 11 23 31 34.6 5 260 -46 -19 56 1 -19 46 21 -19 58 52 -19 43 31 0.53 - 16 0 0 -19 38 59 23 31 35.0 4 260 -47 -19 43 50 -19 34 9 -19 46 40 -19 31 19 0.55 - 15 0 0 -19 26 55 23 31 35.3 3 260 -48 -19 31 45 -19 22 5 -19 34 35 -19 19 15 0.57 - 14 0 0 -19 14 57 23 31 35.5 2 259 -48 -19 19 47 -19 10 7 -19 22 37 -19 7 18 0.61 - 13 0 0 -19 3 7 23 31 35.7 1 259 -49 -19 7 57 -18 58 17 -19 10 47 -18 55 28 0.69 - 12 0 0 -18 51 24 23 31 35.8 0 259 -49 -18 56 14 -18 46 35 -18 59 4 -18 43 45 1.12 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5744-00213-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 15 33.6070 DE: -10 54 43.740 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 15 33.6069 DE: -10 54 43.740 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.3 * B mag [mag]: 11.3 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2692) Chkalov asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.15180 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.009", 0.002", 76.537° remarks: * orbital elements for (2692)Chkalov : Mean anomaly = 133.8526532419 deg Arg. of pericenter = 299.0855982241 deg Long. of node = 236.2318772200 deg Inclination = 9.2848216720 deg Eccentricity = 0.1840021103 Semimajor axis = 2.5811411216 AU Perihelion dist = 2.1062057082 AU Mag: H = 12.20, G = 0.15 Epoch of elements : MJD 60630.97781146 TDT (2024 Nov 16.9778) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.58,2024,11,16,23.467477,0.045959,-0.423797,15.208457,1.664994,0.005288,0.001553,0.000000,0.000000 -104.3070,-10.8365,-175.77,-19.04,False TYC 5744-00213-1,20.25933529,-10.9121498,11.28,10.26,9.71,0.2,0,,20.28187039,-10.8364687,7.72,7.83,0,0,0 2692,Chkalov,17.98,15.746,3.1518,0,0,2.881,4.65,,1.4,0 0,133.6203,2024,11,16,299.0856,236.2319,9.2848,0.18400,2.58114,2.10621,12.20,5.0,0.15 1.293,0.0087,0.0017,77,0.0020,Known errors,0.98,0,-1,-1 20241116_0213-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org