IOTA/IOTA-ES occultation update for (4658) Gavrilov / TYC 1232-00557-1 event on 2024 Oct 24, 16:41 UT Visible from Summary ------- On 2024 Oct 24 UT, the 12.2584826011708 km diameter asteroid (4658) Gavrilov will occult a 10.7 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 6.10 mag to 16.78 mag (the magnitude of the asteroid) for at most 1.390 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: 88 * date and approx. time of event: 2024 Oct 24, 16:31 - 2024 Oct 24, 16:52 * geocentric midpoint of event [JD]: 2460608.19573979 * magnitude of target star: 10.68 * magnitude drop [mag]: 6.10 * estimated maximum duration [s]: 1.390 * Moon: 47 % sunlit, 74° distance * Sun: 160° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.55 * 1 sigma uncertainty interval [seconds]: +/- 5.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.040, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.041", 0.006", 74°) * approx speed of asteroid's shadow [km/s]: 8.9263 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1232-00557-1 by 4658 Gavrilov on 2024 Oct 24 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 49 0 0 -42 25 27 16 52 24.1 0 67 -17 -42 21 19 -42 29 34 -42 16 47 -42 34 7 .... 50 0 0 -42 6 41 16 52 24.0 1 67 -17 -42 2 33 -42 10 49 -41 58 0 -42 15 23 0.19 51 0 0 -41 47 37 16 52 23.7 2 66 -18 -41 43 28 -41 51 45 -41 38 55 -41 56 19 0.34 52 0 0 -41 28 14 16 52 23.3 3 65 -19 -41 24 5 -41 32 23 -41 19 31 -41 36 58 0.40 53 0 0 -41 8 34 16 52 22.7 3 65 -20 -41 4 24 -41 12 43 -40 59 50 -41 17 18 0.43 54 0 0 -40 48 35 16 52 21.9 4 64 -21 -40 44 26 -40 52 45 -40 39 51 -40 57 20 0.45 55 0 0 -40 28 19 16 52 21.0 5 63 -21 -40 24 9 -40 32 29 -40 19 34 -40 37 5 0.47 56 0 0 -40 7 46 16 52 19.9 6 63 -22 -40 3 35 -40 11 56 -39 59 0 -40 16 33 0.48 57 0 0 -39 46 55 16 52 18.6 7 62 -23 -39 42 44 -39 51 6 -39 38 8 -39 55 43 0.49 58 0 0 -39 25 48 16 52 17.1 8 61 -24 -39 21 37 -39 29 59 -39 17 0 -39 34 37 0.49 59 0 0 -39 4 24 16 52 15.4 9 61 -25 -39 0 13 -39 8 36 -38 55 36 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7 24 1 - 7 31 50 - 7 19 43 - 7 36 8 0.55 -154 0 0 - 7 41 40 16 31 29.4 9 288 9 - 7 37 45 - 7 45 35 - 7 33 27 - 7 49 54 0.55 -153 0 0 - 7 55 51 16 31 27.2 8 288 10 - 7 51 56 - 7 59 46 - 7 47 37 - 8 4 6 0.56 -152 0 0 - 8 10 28 16 31 25.2 7 288 11 - 8 6 33 - 8 14 24 - 8 2 14 - 8 18 44 0.56 -151 0 0 - 8 25 32 16 31 23.5 6 288 12 - 8 21 36 - 8 29 28 - 8 17 16 - 8 33 48 0.56 -150 0 0 - 8 41 1 16 31 22.0 5 288 13 - 8 37 4 - 8 44 57 - 8 32 44 - 8 49 18 0.57 -149 0 0 - 8 56 56 16 31 20.8 4 287 14 - 8 52 59 - 9 0 53 - 8 48 38 - 9 5 14 0.58 -148 0 0 - 9 13 16 16 31 19.8 3 287 15 - 9 9 19 - 9 17 14 - 9 4 57 - 9 21 36 0.59 -147 0 0 - 9 30 2 16 31 19.1 2 287 16 - 9 26 4 - 9 34 0 - 9 21 42 - 9 38 23 0.61 -146 0 0 - 9 47 13 16 31 18.7 1 287 17 - 9 43 15 - 9 51 12 - 9 38 52 - 9 55 35 0.66 -145 0 0 -10 4 49 16 31 18.5 0 287 18 -10 0 50 -10 8 48 - 9 56 27 -10 13 12 1.09 Uncertainty in time = +/- 6 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 1232-00557-1 * constellation : Aries * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 17 25.5675 DE: +16 24 41.040 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 17 25.5675 DE: +16 24 41.040 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4658) Gavrilov asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.010 distance from Earth [AU]: 1.64790 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): 0.041", 0.006", 73.656° remarks: * orbital elements for (4658)Gavrilov : Mean anomaly = 26.3601990625 deg Arg. of pericenter = 210.7278654388 deg Long. of node = 153.3946721007 deg Inclination = 1.1671602524 deg Eccentricity = 0.2050516755 Semimajor axis = 3.1479707196 AU Perihelion dist = 2.5024740490 AU Mag: H = 13.08, G = 0.15 Epoch of elements : MJD 60607.69573588 TDT (2024 Oct 24.6957) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Feb09,1.39,2024,10,24,16.697755,0.135363,-0.442320,-4.817694,-1.474463,-0.001963,-0.000356,0.000001,0.000000 125.6684,16.5043,-74.44,-12.09,False TYC 1232-00557-1,3.29043542,16.4113999,11.31,10.68,10.34,0.1,0,,3.31398314,16.5042903,6.11,6.00,0,0,0 4658,Gavrilov,16.78,12.378,1.6479,0,0,-1.788,-7.87,,1.2,0 0,26.2374,2024,10,24,210.7279,153.3947,1.1672,0.20505,3.14797,2.50247,13.08,5.0,0.15 1.551,0.0413,0.0057,74,0.0057,Known errors,1.18,0,-1,-1 20241024_0557-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org