IOTA/IOTA-ES occultation update for (1692) Subbotina / TYC 6278-02606-1 event on 2024 Oct 11, 11:21 UT Visible from Summary ------- On 2024 Oct 11 UT, the 38.27 km diameter asteroid (1692) Subbotina will occult a 10.5 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 5.83 mag to 16.30 mag (the magnitude of the asteroid) for at most 1.550 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: 100 * date and approx. time of event: 2024 Oct 11, 11:17 - 2024 Oct 11, 11:26 * geocentric midpoint of event [JD]: 2460594.97338704 * magnitude of target star: 10.48 * magnitude drop [mag]: 5.83 * estimated maximum duration [s]: 1.550 * Moon: 58 % sunlit, 22° distance * Sun: 79° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 86°) * approx speed of asteroid's shadow [km/s]: 24.7633 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6278-02606-1 by 1692 Subbotina on 2024 Oct 11 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 - 1 0 0 2 5 4 11 17 23.4 0 111 77 1 53 57 .. .. .. 1 52 28 .. .. .. .... 0 0 0 1 42 5 11 17 23.4 1 111 78 1 30 58 1 53 12 1 29 29 1 54 41 0.09 1 0 0 1 19 7 11 17 23.5 2 111 79 1 8 0 1 30 14 1 6 31 1 31 43 0.02 2 0 0 0 56 10 11 17 23.8 3 111 80 0 45 3 1 7 17 0 43 35 1 8 46 0.00 3 0 0 0 33 16 11 17 24.1 4 111 81 0 22 9 0 44 23 0 20 41 0 45 52 -0.01 4 0 0 0 10 25 11 17 24.5 5 111 82 - 0 0 42 0 21 31 - 0 2 10 0 23 0 -0.02 5 0 0 - 0 12 23 11 17 25.0 6 111 83 - 0 23 30 - 0 1 17 - 0 24 58 0 0 12 -0.02 6 0 0 - 0 35 8 11 17 25.6 8 111 83 - 0 46 14 - 0 24 1 - 0 47 42 - 0 22 33 -0.03 7 0 0 - 0 57 47 11 17 26.3 9 111 84 - 1 8 53 - 0 46 41 - 1 10 22 - 0 45 13 -0.03 8 0 0 - 1 20 22 11 17 27.0 10 111 84 - 1 31 28 - 1 9 17 - 1 32 56 - 1 7 48 -0.03 9 0 0 - 1 42 52 11 17 27.9 11 111 84 - 1 53 57 - 1 31 46 - 1 55 25 - 1 30 18 -0.03 10 0 0 - 2 5 15 11 17 28.8 12 111 84 - 2 16 20 - 1 54 10 - 2 17 48 - 1 52 42 -0.03 11 0 0 - 2 27 32 11 17 29.9 13 111 84 - 2 38 37 - 2 16 27 - 2 40 5 - 2 14 59 -0.03 12 0 0 - 2 49 42 11 17 31.0 14 111 83 - 3 0 46 - 2 38 38 - 3 2 14 - 2 37 10 -0.04 13 0 0 - 3 11 44 11 17 32.2 15 111 83 - 3 22 48 - 3 0 41 - 3 24 16 - 2 59 12 -0.04 14 0 0 - 3 33 39 11 17 33.5 16 111 82 - 3 44 42 - 3 22 35 - 3 46 10 - 3 21 7 -0.04 15 0 0 - 3 55 25 11 17 34.9 17 111 82 - 4 6 27 - 3 44 22 - 4 7 55 - 3 42 54 -0.04 16 0 0 - 4 17 1 11 17 36.3 18 111 81 - 4 28 3 - 4 5 59 - 4 29 31 - 4 4 31 -0.04 17 0 0 - 4 38 29 11 17 37.9 19 110 80 - 4 49 30 - 4 27 27 - 4 50 58 - 4 25 59 -0.04 18 0 0 - 4 59 46 11 17 39.5 20 110 79 - 5 10 47 - 4 48 45 - 5 12 15 - 4 47 17 -0.04 19 0 0 - 5 20 53 11 17 41.2 21 110 78 - 5 31 53 - 5 9 52 - 5 33 21 - 5 8 24 -0.04 20 0 0 - 5 41 48 11 17 43.0 22 110 77 - 5 52 48 - 5 30 48 - 5 54 16 - 5 29 21 -0.04 21 0 0 - 6 2 33 11 17 44.8 24 110 76 - 6 13 32 - 5 51 34 - 6 15 0 - 5 50 6 -0.04 22 0 0 - 6 23 6 11 17 46.8 25 110 75 - 6 34 4 - 6 12 7 - 6 35 32 - 6 10 39 -0.04 23 0 0 - 6 43 26 11 17 48.8 26 110 74 - 6 54 24 - 6 32 28 - 6 55 52 - 6 31 1 -0.04 24 0 0 - 7 3 34 11 17 50.9 27 110 73 - 7 14 32 - 6 52 37 - 7 15 59 - 6 51 9 -0.04 25 0 0 - 7 23 29 11 17 53.1 28 110 72 - 7 34 26 - 7 12 32 - 7 35 53 - 7 11 5 -0.04 26 0 0 - 7 43 10 11 17 55.3 29 110 71 - 7 54 6 - 7 32 14 - 7 55 33 - 7 30 47 -0.04 27 0 0 - 8 2 38 11 17 57.6 30 109 70 - 8 13 33 - 7 51 42 - 8 15 0 - 7 50 15 -0.04 28 0 0 - 8 21 51 11 18 0.0 31 109 69 - 8 32 46 - 8 10 56 - 8 34 12 - 8 9 29 -0.04 29 0 0 - 8 40 50 11 18 2.5 32 109 68 - 8 51 44 - 8 29 56 - 8 53 10 - 8 28 29 -0.04 30 0 0 - 8 59 33 11 18 5.0 33 109 67 - 9 10 26 - 8 48 40 - 9 11 53 - 8 47 13 -0.04 31 0 0 - 9 18 2 11 18 7.6 34 109 66 - 9 28 54 - 9 7 9 - 9 30 21 - 9 5 43 -0.04 32 0 0 - 9 36 15 11 18 10.3 35 109 65 - 9 47 6 - 9 25 23 - 9 48 33 - 9 23 56 -0.04 33 0 0 - 9 54 11 11 18 13.0 36 109 64 -10 5 2 - 9 43 20 -10 6 28 - 9 41 54 -0.05 34 0 0 -10 11 52 11 18 15.8 37 109 63 -10 22 42 -10 1 2 -10 24 8 - 9 59 35 -0.05 35 0 0 -10 29 16 11 18 18.7 38 108 62 -10 40 5 -10 18 26 -10 41 31 -10 17 0 -0.05 36 0 0 -10 46 23 11 18 21.6 39 108 61 -10 57 11 -10 35 34 -10 58 37 -10 34 8 -0.05 37 0 0 -11 3 12 11 18 24.5 40 108 60 -11 14 0 -10 52 25 -11 15 26 -10 50 59 -0.05 38 0 0 -11 19 45 11 18 27.6 41 108 59 -11 30 32 -11 8 58 -11 31 57 -11 7 32 -0.05 39 0 0 -11 35 59 11 18 30.7 42 108 58 -11 46 45 -11 25 13 -11 48 11 -11 23 47 -0.05 40 0 0 -11 51 56 11 18 33.8 43 108 57 -12 2 41 -11 41 11 -12 4 7 -11 39 45 -0.05 41 0 0 -12 7 34 11 18 37.0 44 107 56 -12 18 19 -11 56 50 -12 19 44 -11 55 24 -0.05 42 0 0 -12 22 54 11 18 40.3 45 107 55 -12 33 38 -12 12 11 -12 35 4 -12 10 45 -0.05 43 0 0 -12 37 56 11 18 43.6 46 107 54 -12 48 39 -12 27 13 -12 50 4 -12 25 47 -0.05 44 0 0 -12 52 38 11 18 46.9 47 107 53 -13 3 20 -12 41 56 -13 4 45 -12 40 31 -0.05 45 0 0 -13 7 1 11 18 50.3 48 107 52 -13 17 43 -12 56 20 -13 19 8 -12 54 55 -0.05 46 0 0 -13 21 5 11 18 53.8 49 107 51 -13 31 46 -13 10 25 -13 33 11 -13 9 0 -0.05 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0 26 27 0 48 41 0 24 58 0 50 9 -0.03 168 0 0 1 0 30 11 25 55.8 7 249 -72 0 49 23 1 11 37 0 47 54 1 13 6 -0.03 169 0 0 1 23 29 11 25 56.3 6 249 -73 1 12 22 1 34 36 1 10 53 1 36 5 -0.03 170 0 0 1 46 29 11 25 56.8 5 249 -74 1 35 22 1 57 37 1 33 53 1 59 5 -0.03 171 0 0 2 9 31 11 25 57.2 4 249 -75 1 58 23 2 20 38 1 56 55 2 22 7 -0.02 172 0 0 2 32 32 11 25 57.5 3 249 -76 2 21 25 2 43 40 2 19 56 2 45 9 -0.01 173 0 0 2 55 34 11 25 57.6 2 249 -77 2 44 27 3 6 42 2 42 58 3 8 10 0.01 174 0 0 3 18 36 11 25 57.7 1 249 -78 3 7 28 3 29 43 3 5 59 3 31 12 0.10 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 6278-02606-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 30 40.6804 DE: -20 51 19.674 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 30 40.6802 DE: -20 51 19.674 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.5 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1692) Subbotina asteroid class: approx. diameter [km]: 38 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.39640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.012", 0.001", 86.074° remarks: * orbital elements for (1692)Subbotina : Mean anomaly = 352.2769041862 deg Arg. of pericenter = 111.8353160848 deg Long. of node = 199.5578712394 deg Inclination = 2.4269093489 deg Eccentricity = 0.1364704023 Semimajor axis = 2.7875687028 AU Perihelion dist = 2.4071480806 AU Mag: H = 11.37, G = 0.15 Epoch of elements : MJD 60594.47338667 TDT (2024 Oct 11.4734) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.55,2024,10,11,11.361289,-0.000430,0.052522,13.975818,0.188695,0.005490,0.000356,0.000000,0.000000 87.0753,-20.8391,6.24,-7.31,False TYC 6278-02606-1,18.51130013,-20.8554650,10.77,10.48,10.32,0.0,0,,18.53580637,-20.8390853,5.83,5.54,0,0,0 1692,Subbotina,16.30,38.270,2.3964,0,0,3.659,0.69,,1.8,0 0,352.1767,2024,10,11,111.8353,199.5579,2.4269,0.13647,2.78757,2.40715,11.37,5.0,0.15 1.066,0.0120,0.0013,86,0.0015,Known errors,1.00,0,-1,-1 20241011_2606-1,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org