IOTA/IOTA-ES occultation update for (1249) Rutherfordia / TYC 6313-01446-1 event on 2024 Oct 23, 23:09 UT Visible from Summary ------- On 2024 Oct 23 UT, the 13.1767450061599 km diameter asteroid (1249) Rutherfordia will occult a 8.9 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 7.28 mag to 16.13 mag (the magnitude of the asteroid) for at most 0.740 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 Oct 23, 23:03 - 2024 Oct 23, 23:15 * geocentric midpoint of event [JD]: 2460607.46480383 * magnitude of target star: 8.85 * magnitude drop [mag]: 7.28 * estimated maximum duration [s]: 0.740 * Moon: 53 % sunlit, 170° distance * Sun: 88° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 72°) * approx speed of asteroid's shadow [km/s]: 18.0879 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6313-01446-1 by 1249 Rutherfordia on 2024 Oct 23 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 -169 0 0 - 4 35 29 23 3 27.0 1 106 83 - 4 39 15 - 4 31 44 - 4 41 26 - 4 29 33 .... -168 0 0 - 4 52 13 23 3 27.1 2 106 83 - 4 55 59 - 4 48 28 - 4 58 9 - 4 46 17 0.02 -167 0 0 - 5 8 47 23 3 27.4 3 105 83 - 5 12 33 - 5 5 2 - 5 14 43 - 5 2 51 -0.01 -166 0 0 - 5 25 11 23 3 27.7 4 105 83 - 5 28 57 - 5 21 26 - 5 31 7 - 5 19 16 -0.02 -165 0 0 - 5 41 25 23 3 28.2 5 105 82 - 5 45 10 - 5 37 40 - 5 47 20 - 5 35 29 -0.03 -164 0 0 - 5 57 28 23 3 28.8 6 105 82 - 6 1 13 - 5 53 43 - 6 3 23 - 5 51 33 -0.03 -163 0 0 - 6 13 20 23 3 29.5 7 105 81 - 6 17 4 - 6 9 35 - 6 19 14 - 6 7 25 -0.03 -162 0 0 - 6 29 0 23 3 30.3 8 105 81 - 6 32 44 - 6 25 15 - 6 34 55 - 6 23 5 -0.04 -161 0 0 - 6 44 28 23 3 31.2 9 105 80 - 6 48 13 - 6 40 44 - 6 50 23 - 6 38 34 -0.04 -160 0 0 - 6 59 45 23 3 32.3 10 105 79 - 7 3 29 - 6 56 1 - 7 5 39 - 6 53 51 -0.04 -159 0 0 - 7 14 49 23 3 33.4 11 105 78 - 7 18 34 - 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5 57 41 -0.05 - 49 0 0 - 5 47 18 23 12 27.7 57 250 -31 - 5 51 4 - 5 43 33 - 5 53 14 - 5 41 22 -0.05 - 48 0 0 - 5 30 49 23 12 33.1 56 250 -32 - 5 34 34 - 5 27 3 - 5 36 45 - 5 24 52 -0.05 - 47 0 0 - 5 14 8 23 12 38.5 55 250 -33 - 5 17 53 - 5 10 22 - 5 20 4 - 5 8 11 -0.05 - 46 0 0 - 4 57 16 23 12 43.8 54 250 -34 - 5 1 2 - 4 53 30 - 5 3 12 - 4 51 19 -0.05 - 45 0 0 - 4 40 13 23 12 49.1 53 250 -35 - 4 43 59 - 4 36 27 - 4 46 10 - 4 34 16 -0.05 - 44 0 0 - 4 23 1 23 12 54.3 52 250 -36 - 4 26 47 - 4 19 15 - 4 28 58 - 4 17 3 -0.05 - 43 0 0 - 4 5 38 23 12 59.4 51 250 -37 - 4 9 25 - 4 1 52 - 4 11 36 - 3 59 41 -0.05 - 42 0 0 - 3 48 6 23 13 4.4 50 250 -38 - 3 51 53 - 3 44 20 - 3 54 4 - 3 42 9 -0.05 - 41 0 0 - 3 30 25 23 13 9.4 49 250 -39 - 3 34 12 - 3 26 39 - 3 36 23 - 3 24 27 -0.05 - 40 0 0 - 3 12 36 23 13 14.3 48 250 -40 - 3 16 23 - 3 8 49 - 3 18 34 - 3 6 38 -0.05 - 39 0 0 - 2 54 38 23 13 19.1 47 250 -41 - 2 58 25 - 2 50 51 - 3 0 36 - 2 48 39 -0.05 - 38 0 0 - 2 36 32 23 13 23.9 46 250 -42 - 2 40 19 - 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25 0 0 1 27 34 23 14 17.3 32 251 -56 1 23 46 1 31 22 1 21 34 1 33 34 -0.05 - 24 0 0 1 46 46 23 14 20.7 31 251 -57 1 42 58 1 50 35 1 40 46 1 52 47 -0.05 - 23 0 0 2 6 0 23 14 24.0 30 251 -58 2 2 12 2 9 49 2 0 0 2 12 1 -0.05 - 22 0 0 2 25 15 23 14 27.2 29 251 -59 2 21 27 2 29 3 2 19 15 2 31 16 -0.05 - 21 0 0 2 44 31 23 14 30.3 28 251 -60 2 40 43 2 48 19 2 38 30 2 50 31 -0.05 - 20 0 0 3 3 46 23 14 33.3 27 251 -61 2 59 58 3 7 35 2 57 46 3 9 47 -0.05 - 19 0 0 3 23 2 23 14 36.2 26 251 -63 3 19 14 3 26 50 3 17 1 3 29 2 -0.05 - 18 0 0 3 42 17 23 14 39.0 25 251 -64 3 38 28 3 46 5 3 36 16 3 48 17 -0.05 - 17 0 0 4 1 30 23 14 41.6 24 251 -65 3 57 42 4 5 18 3 55 30 4 7 31 -0.05 - 16 0 0 4 20 42 23 14 44.2 22 251 -66 4 16 54 4 24 30 4 14 42 4 26 43 -0.05 - 15 0 0 4 39 52 23 14 46.6 21 251 -67 4 36 4 4 43 40 4 33 52 4 45 52 -0.05 - 14 0 0 4 59 0 23 14 48.9 20 251 -68 4 55 12 5 2 48 4 52 59 5 5 0 -0.05 - 13 0 0 5 18 4 23 14 51.1 19 251 -69 5 14 16 5 21 52 5 12 4 5 24 5 -0.05 - 12 0 0 5 37 6 23 14 53.2 18 251 -70 5 33 18 5 40 54 5 31 6 5 43 6 -0.05 - 11 0 0 5 56 3 23 14 55.2 17 252 -71 5 52 15 5 59 51 5 50 3 6 2 3 -0.05 - 10 0 0 6 14 57 23 14 57.0 16 252 -72 6 11 9 6 18 45 6 8 57 6 20 57 -0.05 - 9 0 0 6 33 46 23 14 58.8 15 252 -73 6 29 58 6 37 34 6 27 46 6 39 46 -0.05 - 8 0 0 6 52 30 23 15 0.4 14 252 -74 6 48 42 6 56 18 6 46 30 6 58 30 -0.05 - 7 0 0 7 11 9 23 15 1.9 13 252 -75 7 7 21 7 14 57 7 5 9 7 17 8 -0.05 - 6 0 0 7 29 42 23 15 3.3 12 252 -76 7 25 55 7 33 30 7 23 43 7 35 41 -0.04 - 5 0 0 7 48 9 23 15 4.6 11 252 -77 7 44 22 7 51 56 7 42 10 7 54 8 -0.04 - 4 0 0 8 6 30 23 15 5.7 10 252 -78 8 2 42 8 10 17 8 0 31 8 12 29 -0.04 - 3 0 0 8 24 43 23 15 6.8 9 253 -79 8 20 56 8 28 30 8 18 44 8 30 42 -0.04 - 2 0 0 8 42 50 23 15 7.7 8 253 -80 8 39 3 8 46 37 8 36 51 8 48 48 -0.04 - 1 0 0 9 0 49 23 15 8.5 7 253 -81 8 57 2 9 4 36 8 54 50 9 6 47 -0.04 0 0 0 9 18 40 23 15 9.2 6 253 -82 9 14 53 9 22 26 9 12 41 9 24 38 -0.04 1 0 0 9 36 22 23 15 9.8 5 253 -83 9 32 36 9 40 9 9 30 24 9 42 20 -0.04 2 0 0 9 53 56 23 15 10.2 4 253 -84 9 50 10 9 57 43 9 47 59 9 59 54 -0.03 3 0 0 10 11 21 23 15 10.6 3 254 -85 10 7 35 10 15 8 10 5 24 10 17 19 -0.02 4 0 0 10 28 37 23 15 10.8 2 254 -86 10 24 51 10 32 24 10 22 40 10 34 35 -0.01 5 0 0 10 45 44 23 15 10.9 1 254 -87 10 41 58 10 49 30 10 39 46 10 51 41 0.07 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6313-01446-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 59 54.6429 DE: -15 42 13.138 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 59 54.6428 DE: -15 42 13.138 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 8.9 * B mag [mag]: 9.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1249) Rutherfordia asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.19580 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", 72.247° remarks: * orbital elements for (1249)Rutherfordia : Mean anomaly = 203.7883911717 deg Arg. of pericenter = 224.2619199170 deg Long. of node = 258.8915256050 deg Inclination = 4.8726335564 deg Eccentricity = 0.0764264532 Semimajor axis = 2.2241220441 AU Perihelion dist = 2.0541402847 AU Mag: H = 11.39, G = 0.15 Epoch of elements : MJD 60606.96480375 TDT (2024 Oct 23.9648) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.74,2024,10,23,23.155292,-0.007937,0.058098,10.111957,1.406729,0.005524,0.001146,0.000000,0.000000 -79.8556,-15.6362,-171.28,-11.83,False TYC 6313-01446-1,19.99851196,-15.7036492,9.47,8.85,8.52,0.1,0,,20.02189085,-15.6362152,7.28,7.16,0,0,0 1249,Rutherfordia,16.13,13.336,2.1958,0,0,2.804,5.64,,0.8,0 0,203.5017,2024,10,23,224.2619,258.8915,4.8726,0.07643,2.22412,2.05414,11.39,5.0,0.15 1.290,0.0090,0.0019,72,0.0024,Known errors,1.13,0,-1,-1 20241023_1446-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org