IOTA/IOTA-ES occultation update for (2507) Bobone / TYC 846-00322-1 event on 2024 Nov 02, 10:17 UT Visible from Summary ------- On 2024 Nov 02 UT, the 14.651 km diameter asteroid (2507) Bobone will occult a 11.7 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.75 mag to 17.43 mag (the magnitude of the asteroid) for at most 0.460 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 02, 10:14 - 2024 Nov 02, 10:20 * geocentric midpoint of event [JD]: 2460616.92887925 * magnitude of target star: 11.69 * magnitude drop [mag]: 5.75 * estimated maximum duration [s]: 0.460 * Moon: 1 % sunlit, 71° distance * Sun: 60° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 103°) * approx speed of asteroid's shadow [km/s]: 32.0045 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 846-00322-1 by 2507 Bobone on 2024 Nov 2 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 -124 0 0 5 40 12 10 14 18.8 0 80 -56 5 36 7 5 44 17 5 33 42 5 46 41 .... -123 0 0 5 50 6 10 14 18.8 1 81 -55 5 46 1 5 54 11 5 43 37 5 56 35 0.05 -122 0 0 5 59 43 10 14 18.9 2 81 -54 5 55 38 6 3 48 5 53 14 6 6 12 0.11 -121 0 0 6 9 1 10 14 19.1 3 81 -53 6 4 57 6 13 6 6 2 33 6 15 30 0.13 -120 0 0 6 18 2 10 14 19.3 4 81 -52 6 13 58 6 22 6 6 11 34 6 24 30 0.14 -119 0 0 6 26 44 10 14 19.6 5 81 -51 6 22 40 6 30 49 6 20 16 6 33 12 0.14 -118 0 0 6 35 9 10 14 20.0 6 81 -50 6 31 4 6 39 13 6 28 41 6 41 36 0.15 -117 0 0 6 43 14 10 14 20.4 7 81 -49 6 39 10 6 47 18 6 36 47 6 49 42 0.15 -116 0 0 6 51 1 10 14 20.9 8 81 -48 6 46 58 6 55 5 6 44 34 6 57 29 0.15 -115 0 0 6 58 30 10 14 21.4 9 81 -47 6 54 26 7 2 34 6 52 3 7 4 57 0.16 -114 0 0 7 5 40 10 14 22.0 10 82 -46 7 1 36 7 9 43 6 59 13 7 12 6 0.16 -113 0 0 7 12 31 10 14 22.7 11 82 -46 7 8 27 7 16 34 7 6 4 7 18 57 0.16 -112 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37 10 20 40.9 19 288 79 -20 54 47 -20 46 27 -20 57 14 -20 44 0 0.17 32 0 0 -21 5 38 10 20 42.0 18 288 78 -21 9 48 -21 1 28 -21 12 15 -20 59 1 0.17 33 0 0 -21 20 25 10 20 43.0 17 288 77 -21 24 35 -21 16 15 -21 27 2 -21 13 49 0.17 34 0 0 -21 34 58 10 20 44.0 16 287 76 -21 39 8 -21 30 49 -21 41 34 -21 28 22 0.17 35 0 0 -21 49 17 10 20 44.8 15 287 75 -21 53 26 -21 45 8 -21 55 53 -21 42 41 0.17 36 0 0 -22 3 21 10 20 45.7 14 286 74 -22 7 30 -21 59 12 -22 9 57 -21 56 46 0.17 37 0 0 -22 17 11 10 20 46.5 13 286 73 -22 21 20 -22 13 2 -22 23 46 -22 10 36 0.17 38 0 0 -22 30 45 10 20 47.2 12 286 72 -22 34 54 -22 26 37 -22 37 20 -22 24 11 0.17 39 0 0 -22 44 5 10 20 47.8 11 285 71 -22 48 14 -22 39 57 -22 50 40 -22 37 31 0.17 40 0 0 -22 57 10 10 20 48.4 10 285 70 -23 1 18 -22 53 2 -23 3 44 -22 50 36 0.17 41 0 0 -23 9 59 10 20 49.0 9 284 69 -23 14 7 -23 5 51 -23 16 33 -23 3 26 0.17 42 0 0 -23 22 33 10 20 49.5 8 284 68 -23 26 41 -23 18 26 -23 29 7 -23 16 0 0.17 43 0 0 -23 34 52 10 20 49.9 7 284 67 -23 38 59 -23 30 44 -23 41 25 -23 28 19 0.17 44 0 0 -23 46 54 10 20 50.3 6 283 66 -23 51 1 -23 42 47 -23 53 27 -23 40 22 0.17 45 0 0 -23 58 41 10 20 50.6 5 283 65 -24 2 48 -23 54 34 -24 5 13 -23 52 9 0.17 46 0 0 -24 10 12 10 20 50.9 4 282 64 -24 14 19 -24 6 5 -24 16 44 -24 3 40 0.17 47 0 0 -24 21 27 10 20 51.1 3 282 64 -24 25 34 -24 17 21 -24 27 59 -24 14 56 0.17 48 0 0 -24 32 26 10 20 51.3 2 282 63 -24 36 32 -24 28 20 -24 38 57 -24 25 55 0.17 49 0 0 -24 43 9 10 20 51.4 1 281 62 -24 47 15 -24 39 3 -24 49 39 -24 36 38 0.18 50 0 0 -24 53 35 10 20 51.4 1 281 61 -24 57 41 -24 49 29 -25 0 5 -24 47 5 0.19 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 846-00322-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 48 34.7192 DE: +09 38 31.697 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 48 34.7194 DE: +09 38 31.696 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2507) Bobone asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.11400 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 27 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", 0.002", 103.056° remarks: * orbital elements for (2507)Bobone : Mean anomaly = 279.3535390892 deg Arg. of pericenter = 102.4736857005 deg Long. of node = 129.6959908107 deg Inclination = 10.3082858774 deg Eccentricity = 0.0843883873 Semimajor axis = 2.7788503588 AU Perihelion dist = 2.5443476585 AU Mag: H = 11.82, G = 0.15 Epoch of elements : MJD 60616.42887921 TDT (2024 Nov 02.4289) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr27,0.46,2024,11,2,10.293102,-0.045183,-0.163601,17.411981,-4.810398,-0.004678,0.002026,-0.000001,0.000000 -34.1123,9.5124,21.50,-14.97,False TYC 846-00322-1,10.80964420,9.6421383,11.97,11.69,11.54,0.0,0,,10.83112836,9.5123952,5.75,5.45,0,0,0 2507,Bobone,17.43,14.651,3.1140,0,0,3.324,-13.59,,1.2,0 0,279.2623,2024,11,2,102.4737,129.6960,10.3083,0.08439,2.77885,2.54435,11.82,5.0,0.15 1.294,0.0117,0.0019,103,0.0019,Known errors,1.36,0,-1,-1 20241102_0322-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org