IOTA/IOTA-ES occultation update for (626) Notburga / UCAC4 238-108822 event on 2024 Oct 19, 08:30 UT Visible from Summary ------- On 2024 Oct 19 UT, the 81.651 km diameter asteroid (626) Notburga will occult a 11.7 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 3.11 mag to 14.77 mag (the magnitude of the asteroid) for at most 2.250 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: 100 * date and approx. time of event: 2024 Oct 19, 08:27 - 2024 Oct 19, 08:33 * geocentric midpoint of event [JD]: 2460602.85440075 * magnitude of target star: 11.72 * magnitude drop [mag]: 3.11 * estimated maximum duration [s]: 2.250 * Moon: 95 % sunlit, 152° distance * Sun: 52° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 91 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 0.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.002", 93°) * approx speed of asteroid's shadow [km/s]: 36.2272 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 238-108822 by 626 Notburga on 2024 Oct 19 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 - 16 0 0 -23 49 10 8 27 41.6 0 137 27 -24 25 46 -23 12 51 -24 31 0 .. .. .. .... - 15 0 0 -24 49 24 8 27 41.7 2 137 27 -25 26 10 -24 12 55 -25 31 26 -24 7 45 0.43 - 14 0 0 -25 49 40 8 27 41.9 3 136 28 -26 26 36 -25 13 1 -26 31 52 -25 7 49 0.46 - 13 0 0 -26 49 53 8 27 42.3 5 136 29 -27 26 58 -26 13 5 -27 32 16 -26 7 52 0.47 - 12 0 0 -27 50 0 8 27 42.7 6 135 30 -28 27 13 -27 13 4 -28 32 32 -27 7 50 0.47 - 11 0 0 -28 49 57 8 27 43.2 7 135 31 -29 27 18 -28 12 54 -29 32 38 -28 7 39 0.48 - 10 0 0 -29 49 41 8 27 43.8 8 134 32 -30 27 9 -29 12 31 -30 32 30 -29 7 15 0.48 - 9 0 0 -30 49 8 8 27 44.5 10 134 32 -31 26 41 -30 11 52 -31 32 3 -30 6 35 0.48 - 8 0 0 -31 48 13 8 27 45.4 11 133 33 -32 25 52 -31 10 53 -32 31 15 -31 5 35 0.48 - 7 0 0 -32 46 55 8 27 46.3 12 133 34 -33 24 37 -32 9 30 -33 30 1 -32 4 12 0.48 - 6 0 0 -33 45 8 8 27 47.3 14 132 34 -34 22 54 -33 7 40 -34 28 18 -33 2 22 0.48 - 5 0 0 -34 42 50 8 27 48.3 15 132 35 -35 20 38 -34 5 20 -35 26 2 -34 0 2 0.48 - 4 0 0 -35 39 58 8 27 49.5 16 131 36 -36 17 47 -35 2 27 -36 23 11 -34 57 8 0.48 - 3 0 0 -36 36 27 8 27 50.7 17 130 36 -37 14 17 -35 58 56 -37 19 41 -35 53 37 0.48 - 2 0 0 -37 32 17 8 27 52.0 19 130 37 -38 10 5 -36 54 46 -38 15 29 -36 49 27 0.48 - 1 0 0 -38 27 22 8 27 53.4 20 129 37 -39 5 9 -37 49 53 -39 10 33 -37 44 35 0.48 0 0 0 -39 21 42 8 27 54.8 21 128 38 -39 59 26 -38 44 15 -40 4 49 -38 38 57 0.48 1 0 0 -40 15 12 8 27 56.3 22 128 38 -40 52 53 -39 37 50 -40 58 16 -39 32 32 0.49 2 0 0 -41 7 52 8 27 57.8 23 127 38 -41 45 28 -40 30 34 -41 50 51 -40 25 17 0.49 3 0 0 -41 59 39 8 27 59.4 24 126 39 -42 37 10 -41 22 27 -42 42 32 -41 17 10 0.49 4 0 0 -42 50 32 8 28 1.1 25 125 39 -43 27 56 -42 13 25 -43 33 17 -42 8 10 0.49 5 0 0 -43 40 28 8 28 2.7 27 124 39 -44 17 45 -43 3 28 -44 23 4 -42 58 14 0.49 6 0 0 -44 29 26 8 28 4.4 28 124 40 -45 6 35 -43 52 34 -45 11 53 -43 47 21 0.49 7 0 0 -45 17 25 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29 3 -31 49 27 -30 23 45 0.51 -178 0 0 -30 6 49 8 32 44.4 22 233 -30 -30 44 23 -29 29 33 -30 49 45 -29 24 16 0.51 -177 0 0 -29 6 55 8 32 46.0 21 232 -31 -29 44 23 -28 29 45 -29 49 44 -28 24 29 0.51 -176 0 0 -28 6 46 8 32 47.6 20 232 -33 -28 44 6 -27 29 43 -28 49 26 -27 24 28 0.51 -175 0 0 -27 6 25 8 32 49.1 18 231 -34 -27 43 38 -26 29 30 -27 48 57 -26 24 17 0.52 -174 0 0 -26 5 57 8 32 50.5 17 230 -35 -26 43 1 -25 29 11 -26 48 19 -25 23 59 0.52 -173 0 0 -25 5 26 8 32 51.8 16 230 -37 -25 42 20 -24 28 49 -25 47 36 -24 23 38 0.52 -172 0 0 -24 4 55 8 32 53.0 14 230 -38 -24 41 39 -23 28 29 -24 46 54 -23 23 19 0.53 -171 0 0 -23 4 28 8 32 54.1 13 229 -39 -23 41 1 -22 28 12 -23 46 14 -22 23 4 0.53 -170 0 0 -22 4 9 8 32 55.1 12 229 -41 -22 40 30 -21 28 4 -22 45 42 -21 22 58 0.54 -169 0 0 -21 4 1 8 32 56.0 10 228 -42 -21 40 10 -20 28 8 -21 45 20 -20 23 3 0.54 -168 0 0 -20 4 7 8 32 56.7 9 228 -43 -20 40 4 -19 28 27 -20 45 12 -19 23 24 0.55 -167 0 0 -19 4 32 8 32 57.4 7 228 -45 -19 40 15 -18 29 4 -19 45 21 -18 24 3 0.56 -166 0 0 -18 5 18 8 32 58.0 6 227 -46 -18 40 48 -17 30 4 -18 45 52 -17 25 4 0.58 -165 0 0 -17 6 28 8 32 58.4 5 227 -48 -17 41 44 -16 31 27 -17 46 46 -16 26 30 0.61 -164 0 0 -16 8 6 8 32 58.7 3 227 -49 -16 43 8 -15 33 19 -16 48 8 -15 28 24 0.65 -163 0 0 -15 10 14 8 32 59.0 2 226 -50 -15 45 1 -14 35 41 -15 49 59 -14 30 48 0.77 -162 0 0 -14 12 55 8 32 59.1 1 226 -52 -14 47 27 -13 38 37 -14 52 23 -13 33 45 1.36 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 238-108822 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 46 52.2350 DE: -42 25 41.361 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 46 52.2349 DE: -42 25 41.361 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (626) Notburga asteroid class: approx. diameter [km]: 82 approx. diameter ["]: 0.036 distance from Earth [AU]: 3.16900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#57 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): 0.006", 0.002", 92.641° remarks: * orbital elements for (626)Notburga : Mean anomaly = 273.7756314807 deg Arg. of pericenter = 43.6043584474 deg Long. of node = 341.5689722153 deg Inclination = 25.3714475238 deg Eccentricity = 0.2417941840 Semimajor axis = 2.5747294514 AU Perihelion dist = 1.9521748445 AU Mag: H = 9.22, G = 0.15 Epoch of elements : MJD 60602.35440050 TDT (2024 Oct 19.3544) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,2.25,2024,10,19,8.505618,0.051246,-0.428761,20.300265,2.450426,0.004176,-0.001818,-0.000001,0.000000 96.2539,-42.4743,48.64,-10.21,False UCAC4 238-108822,16.78117643,-42.4281562,12.00,11.72,11.57,0.0,0,,16.80988915,-42.4743002,3.12,2.84,0,0,0 626,Notburga,14.77,81.651,3.1690,0,0,5.092,6.81,,4.8,0 0,273.6911,2024,10,19,43.6044,341.5690,25.3714,0.24179,2.57473,1.95217,9.22,5.0,0.15 1.071,0.0063,0.0023,93,0.0025,Known errors,0.80,0,-1,-1 20241019_108822,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org