IOTA/IOTA-ES occultation update for (3776) Vartiovuori / TYC 6779-00485-1 event on 2024 Feb 09, 00:46 UT Visible from Summary ------- On 2024 Feb 09 UT, the 24.9168132463662 km diameter asteroid (3776) Vartiovuori will occult a 10.5 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.22 mag to 16.72 mag (the magnitude of the asteroid) for at most 1.050 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 Feb 09, 00:42 - 2024 Feb 09, 00:51 * geocentric midpoint of event [JD]: 2460349.53246421 * magnitude of target star: 10.50 * magnitude drop [mag]: 6.22 * estimated maximum duration [s]: 1.050 * Moon: 1 % sunlit, 64° distance * Sun: 76° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.002", 129°) * approx speed of asteroid's shadow [km/s]: 24.0407 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6779-00485-1 by 3776 Vartiovuori on 2024 Feb 9 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 27 0 0 .. .. .... .. .. .. .. .. .. 45 22 29 .. .. .. 45 18 13 .. .. .. .... 28 0 0 45 2 17 0 42 31.7 1 125 -48 44 53 42 45 10 53 44 49 24 45 15 11 .... 29 0 0 44 32 48 0 42 31.8 2 125 -47 44 24 10 44 41 27 44 19 51 44 45 47 -0.12 30 0 0 44 2 35 0 42 32.0 3 126 -47 43 53 54 44 11 16 43 49 33 44 15 37 -0.18 31 0 0 43 31 36 0 42 32.2 3 127 -47 43 22 53 43 40 20 43 18 31 43 44 43 -0.21 32 0 0 42 59 52 0 42 32.5 4 127 -46 42 51 6 43 8 39 42 46 42 43 13 3 -0.23 33 0 0 42 27 22 0 42 32.8 5 128 -46 42 18 33 42 36 12 42 14 8 42 40 37 -0.24 34 0 0 41 54 6 0 42 33.3 6 129 -46 41 45 14 42 2 58 41 40 48 42 7 25 -0.25 35 0 0 41 20 3 0 42 33.8 7 129 -45 41 11 9 41 28 58 41 6 41 41 33 27 -0.25 36 0 0 40 45 14 0 42 34.4 8 130 -45 40 36 17 40 54 12 40 31 48 40 58 41 -0.26 37 0 0 40 9 38 0 42 35.1 9 131 -44 40 0 38 40 18 38 39 56 8 40 23 9 -0.26 38 0 0 39 33 15 0 42 35.8 10 131 -44 39 24 13 39 42 18 39 19 41 39 46 50 -0.27 39 0 0 38 56 5 0 42 36.7 11 132 -43 38 47 0 39 5 11 38 42 27 39 9 45 -0.27 40 0 0 38 18 9 0 42 37.7 12 133 -42 38 9 1 38 27 17 38 4 27 38 31 52 -0.27 41 0 0 37 39 26 0 42 38.7 13 133 -42 37 30 16 37 48 37 37 25 40 37 53 13 -0.27 42 0 0 36 59 56 0 42 39.9 14 134 -41 36 50 44 37 9 9 36 46 7 37 13 47 -0.27 43 0 0 36 19 41 0 42 41.2 15 134 -41 36 10 26 36 28 56 36 5 48 36 33 35 -0.28 44 0 0 35 38 39 0 42 42.5 16 135 -40 35 29 22 35 47 57 35 24 43 35 52 37 -0.28 45 0 0 34 56 53 0 42 44.0 17 136 -39 34 47 33 35 6 13 34 42 53 35 10 53 -0.28 46 0 0 34 14 21 0 42 45.6 18 136 -39 34 5 0 34 23 43 34 0 19 34 28 25 -0.28 47 0 0 33 31 6 0 42 47.3 19 137 -38 33 21 43 33 40 30 33 17 1 33 45 13 -0.28 48 0 0 32 47 8 0 42 49.2 21 137 -37 32 37 43 32 56 34 32 33 0 33 1 18 -0.28 49 0 0 32 2 28 0 42 51.1 22 138 -36 31 53 0 32 11 56 31 48 16 32 16 40 -0.28 50 0 0 31 17 6 0 42 53.2 23 139 -36 31 7 37 31 26 36 31 2 52 31 31 21 -0.28 51 0 0 30 31 4 0 42 55.4 24 139 -35 30 21 34 30 40 36 30 16 48 30 45 22 -0.28 52 0 0 29 44 24 0 42 57.8 25 140 -34 29 34 52 29 53 57 29 30 6 29 58 44 -0.28 53 0 0 28 57 6 0 43 0.2 26 140 -33 28 47 33 29 6 41 28 42 46 29 11 28 -0.28 54 0 0 28 9 13 0 43 2.8 27 141 -32 27 59 38 28 18 48 27 54 51 28 23 37 -0.28 55 0 0 27 20 45 0 43 5.6 29 142 -31 27 11 10 27 30 22 27 6 21 27 35 11 -0.28 56 0 0 26 31 45 0 43 8.4 30 142 -30 26 22 8 26 41 23 26 17 20 26 46 12 -0.29 57 0 0 25 42 14 0 43 11.4 31 143 -29 25 32 36 25 51 52 25 27 47 25 56 42 -0.29 58 0 0 24 52 14 0 43 14.6 32 143 -28 24 42 36 25 1 53 24 37 47 25 6 43 -0.29 59 0 0 24 1 48 0 43 17.8 33 144 -27 23 52 9 24 11 27 23 47 19 24 16 18 -0.29 60 0 0 23 10 57 0 43 21.2 35 144 -26 23 1 18 23 20 37 22 56 28 23 25 27 -0.29 61 0 0 22 19 43 0 43 24.8 36 145 -25 22 10 4 22 29 23 22 5 14 22 34 14 -0.29 62 0 0 21 28 10 0 43 28.4 37 146 -24 21 18 30 21 37 50 21 13 40 21 42 41 -0.29 63 0 0 20 36 19 0 43 32.2 38 146 -23 20 26 39 20 45 59 20 21 49 20 50 50 -0.29 64 0 0 19 44 12 0 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2 22 -18 47 26 -19 6 7 -18 43 41 -0.31 177 0 0 -18 36 3 0 50 54.8 9 249 83 -18 43 33 -18 28 32 -18 47 18 -18 24 47 -0.31 178 0 0 -18 16 27 0 50 55.5 8 248 82 -18 23 59 -18 8 55 -18 27 45 -18 5 9 -0.31 179 0 0 -17 56 8 0 50 56.2 7 248 81 -18 3 42 -17 48 35 -18 7 28 -17 44 47 -0.31 180 0 0 -17 35 5 0 50 56.8 6 248 81 -17 42 40 -17 27 30 -17 46 28 -17 23 41 -0.31 -179 0 0 -17 13 18 0 50 57.3 5 247 80 -17 20 54 -17 5 40 -17 24 43 -17 1 51 -0.31 -178 0 0 -16 50 46 0 50 57.7 4 247 79 -16 58 24 -16 43 6 -17 2 14 -16 39 16 -0.31 -177 0 0 -16 27 29 0 50 58.0 3 247 78 -16 35 10 -16 19 48 -16 39 0 -16 15 57 -0.31 -176 0 0 -16 3 27 0 50 58.3 2 247 77 -16 11 10 -15 55 44 -16 15 2 -15 51 52 -0.32 -175 0 0 -15 38 41 0 50 58.4 1 246 76 -15 46 25 -15 30 56 -15 50 18 -15 27 3 -0.33 -174 0 0 -15 13 9 0 50 58.5 0 246 75 -15 20 55 .. .. .. -15 24 49 .. .. .. -1.61 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: TYC 6779-00485-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 01 39.9126 DE: -23 03 12.542 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 01 39.9127 DE: -23 03 12.542 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.5 * B mag [mag]: 11.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3776) Vartiovuori asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.06350 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.022", 0.002", 129.274° remarks: * orbital elements for (3776)Vartiovuori : Mean anomaly = 22.9243268880 deg Arg. of pericenter = 159.0597933559 deg Long. of node = 39.5831401742 deg Inclination = 27.3867781059 deg Eccentricity = 0.0673479980 Semimajor axis = 3.1858389327 AU Perihelion dist = 2.9712790586 AU Mag: H = 10.95, G = 0.15 Epoch of elements : MJD 60349.03246425 TDT (2024 Feb 09.0325) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,1.05,2024,2,9,0.779141,0.162041,0.244382,11.312288,-7.493769,-0.005736,0.001081,0.000000,0.000000 90.4609,-23.1208,171.85,-14.89,False TYC 6779-00485-1,16.02775348,-23.0534839,11.06,10.50,10.20,0.1,0,,16.05146062,-23.1207721,6.22,6.07,0,0,0 3776,Vartiovuori,16.72,25.139,3.0635,0,0,2.355,-21.52,,1.4,0 0,22.7454,2024,2,8,159.0598,39.5831,27.3868,0.06735,3.18584,2.97128,10.95,5.0,0.15 1.250,0.0217,0.0018,129,0.0028,Known errors,1.33,0,-1,-1 20240209_0485-1,60138.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org