IOTA/IOTA-ES occultation update for (3599) Basov / TYC 647-00172-1 event on 2024 Oct 23, 16:30 UT Visible from Summary ------- On 2024 Oct 23 UT, the 18.1211792053909 km diameter asteroid (3599) Basov will occult a 9.7 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.97 mag to 17.71 mag (the magnitude of the asteroid) for at most 1.300 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: 94 * date and approx. time of event: 2024 Oct 23, 16:23 - 2024 Oct 23, 16:37 * geocentric midpoint of event [JD]: 2460607.18794237 * magnitude of target star: 9.74 * magnitude drop [mag]: 7.97 * estimated maximum duration [s]: 1.300 * Moon: 57 % sunlit, 68° distance * Sun: 165° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.004", 74°) * approx speed of asteroid's shadow [km/s]: 14.1008 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 647-00172-1 by 3599 Basov 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 48 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -46 38 54 .. .. .. .... 49 0 0 -46 34 6 16 37 8.0 1 68 -12 -46 27 54 -46 40 19 -46 22 19 -46 45 55 .... 50 0 0 -46 17 13 16 37 7.9 1 67 -13 -46 11 0 -46 23 26 -46 5 24 -46 29 3 0.34 51 0 0 -46 0 0 16 37 7.7 2 66 -14 -45 53 46 -46 6 14 -45 48 10 -46 11 52 0.43 52 0 0 -45 42 28 16 37 7.4 3 66 -14 -45 36 13 -45 48 43 -45 30 36 -45 54 21 0.47 53 0 0 -45 24 37 16 37 7.0 4 65 -15 -45 18 21 -45 30 52 -45 12 43 -45 36 31 0.49 54 0 0 -45 6 26 16 37 6.5 4 64 -16 -45 0 10 -45 12 43 -44 54 32 -45 18 23 0.51 55 0 0 -44 47 57 16 37 5.9 5 63 -17 -44 41 40 -44 54 14 -44 36 1 -44 59 55 0.52 56 0 0 -44 29 9 16 37 5.2 6 63 -17 -44 22 51 -44 35 27 -44 17 12 -44 41 8 0.53 57 0 0 -44 10 2 16 37 4.4 7 62 -18 -44 3 44 -44 16 21 -43 58 3 -44 22 2 0.54 58 0 0 -43 50 37 16 37 3.5 8 61 -19 -43 44 18 -43 56 56 -43 38 37 -44 2 39 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- 9 22 52 - 9 34 38 - 9 17 34 - 9 39 57 0.61 -155 0 0 - 9 41 13 16 24 11.2 7 286 7 - 9 35 19 - 9 47 7 - 9 30 1 - 9 52 26 0.62 -154 0 0 - 9 54 8 16 24 10.2 6 286 8 - 9 48 14 -10 0 3 - 9 42 55 -10 5 23 0.62 -153 0 0 -10 7 31 16 24 9.3 5 286 9 -10 1 36 -10 13 26 - 9 56 16 -10 18 47 0.63 -152 0 0 -10 21 20 16 24 8.5 4 286 10 -10 15 24 -10 27 16 -10 10 4 -10 32 37 0.64 -151 0 0 -10 35 36 16 24 7.9 3 286 11 -10 29 40 -10 41 33 -10 24 19 -10 46 54 0.65 -150 0 0 -10 50 19 16 24 7.5 2 285 12 -10 44 22 -10 56 16 -10 39 0 -11 1 38 0.68 -149 0 0 -11 5 28 16 24 7.2 1 285 13 -10 59 30 -11 11 26 -10 54 8 -11 16 49 0.76 -148 0 0 -11 21 3 16 24 7.1 0 285 14 -11 15 5 -11 27 2 -11 9 42 -11 32 25 1.69 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 647-00172-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 53 47.6233 DE: +14 36 13.276 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 53 47.6234 DE: +14 36 13.276 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.7 * B mag [mag]: 10.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3599) Basov asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.010 distance from Earth [AU]: 2.54830 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2023 Feb 09 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): 0.024", 0.004", 73.876° remarks: * orbital elements for (3599)Basov : Mean anomaly = 189.5527355416 deg Arg. of pericenter = 49.6707328703 deg Long. of node = 163.8172041503 deg Inclination = 1.6467720471 deg Eccentricity = 0.1117280926 Semimajor axis = 3.1683973263 AU Perihelion dist = 2.8143983364 AU Mag: H = 12.58, G = 0.15 Epoch of elements : MJD 60606.68793992 TDT (2024 Oct 23.6879) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Feb09,1.30,2024,10,23,16.510617,0.158964,-0.477086,-7.548381,-2.523086,-0.001551,-0.000268,0.000001,0.000000 123.5546,14.7069,-71.60,-11.74,False TYC 647-00172-1,2.89656202,14.6036878,10.04,9.74,9.58,0.1,0,,2.91970234,14.7068926,7.97,7.68,0,0,0 3599,Basov,17.71,18.306,2.5483,0,0,-1.795,-8.71,,1.6,0 0,189.4325,2024,10,23,49.6707,163.8172,1.6468,0.11173,3.16840,2.81440,12.57,5.0,0.15 1.451,0.0243,0.0043,74,0.0044,Known errors,1.07,0,-1,-1 20241023_0172-1,60140.65 ------ 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