IOTA/IOTA-ES occultation update for (1570) Brunonia / UCAC4 370-184090 event on 2024 Nov 26, 00:23 UT Visible from Summary ------- On 2024 Nov 26 UT, the 12.347 km diameter asteroid (1570) Brunonia will occult a 11.9 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.77 mag to 17.69 mag (the magnitude of the asteroid) for at most 0.450 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 26, 00:19 - 2024 Nov 26, 00:27 * geocentric midpoint of event [JD]: 2460640.51635716 * magnitude of target star: 11.93 * magnitude drop [mag]: 5.77 * estimated maximum duration [s]: 0.450 * Moon: 23 % sunlit, 126° distance * Sun: 69° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 75°) * approx speed of asteroid's shadow [km/s]: 27.5637 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 370-184090 by 1570 Brunonia on 2024 Nov 26 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 147 0 0 -27 4 13 0 19 48.1 0 108 66 -27 7 50 -27 0 36 -27 9 55 -26 58 31 .... 148 0 0 -27 21 23 0 19 48.2 1 107 67 -27 24 59 -27 17 46 -27 27 4 -27 15 42 0.24 149 0 0 -27 38 16 0 19 48.3 2 107 68 -27 41 52 -27 34 40 -27 43 57 -27 32 35 0.24 150 0 0 -27 54 51 0 19 48.4 3 106 69 -27 58 27 -27 51 15 -28 0 32 -27 49 11 0.24 151 0 0 -28 11 9 0 19 48.7 4 106 70 -28 14 45 -28 7 34 -28 16 49 -28 5 29 0.24 152 0 0 -28 27 9 0 19 49.0 5 105 70 -28 30 45 -28 23 34 -28 32 49 -28 21 30 0.24 153 0 0 -28 42 52 0 19 49.3 6 105 71 -28 46 27 -28 39 17 -28 48 31 -28 37 13 0.24 154 0 0 -28 58 16 0 19 49.8 7 104 72 -29 1 51 -28 54 42 -29 3 55 -28 52 38 0.24 155 0 0 -29 13 23 0 19 50.2 8 104 73 -29 16 57 -29 9 48 -29 19 1 -29 7 45 0.24 156 0 0 -29 28 10 0 19 50.8 9 104 73 -29 31 45 -29 24 36 -29 33 48 -29 22 33 0.24 157 0 0 -29 42 40 0 19 51.3 9 103 74 -29 46 14 -29 39 6 -29 48 17 -29 37 3 0.24 158 0 0 -29 56 51 0 19 52.0 10 103 75 -30 0 24 -29 53 17 -30 2 27 -29 51 14 0.24 159 0 0 -30 10 43 0 19 52.7 11 102 75 -30 14 16 -30 7 9 -30 16 19 -30 5 7 0.24 160 0 0 -30 24 16 0 19 53.4 12 101 76 -30 27 49 -30 20 43 -30 29 52 -30 18 40 0.24 161 0 0 -30 37 30 0 19 54.3 13 101 76 -30 41 3 -30 33 58 -30 43 6 -30 31 55 0.24 162 0 0 -30 50 26 0 19 55.1 14 100 77 -30 53 58 -30 46 53 -30 56 1 -30 44 51 0.24 163 0 0 -31 3 2 0 19 56.0 15 100 77 -31 6 34 -30 59 30 -31 8 36 -30 57 28 0.24 164 0 0 -31 15 19 0 19 57.0 16 99 77 -31 18 51 -31 11 47 -31 20 53 -31 9 45 0.24 165 0 0 -31 27 17 0 19 58.0 17 99 78 -31 30 48 -31 23 45 -31 32 50 -31 21 44 0.24 166 0 0 -31 38 55 0 19 59.1 17 98 78 -31 42 27 -31 35 24 -31 44 28 -31 33 22 0.24 167 0 0 -31 50 15 0 20 0.2 18 98 78 -31 53 46 -31 46 44 -31 55 47 -31 44 42 0.24 168 0 0 -32 1 14 0 20 1.4 19 97 78 -32 4 45 -31 57 44 -32 6 46 -31 55 42 0.24 169 0 0 -32 11 54 0 20 2.6 20 97 78 -32 15 25 -32 8 24 -32 17 26 -32 6 23 0.24 170 0 0 -32 22 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8 - 8 30 41 - 8 19 0 0.25 - 55 0 0 - 8 1 9 0 26 48.0 29 256 -37 - 8 4 52 - 7 57 27 - 8 7 0 - 7 55 19 0.25 - 54 0 0 - 7 37 35 0 26 50.2 28 256 -38 - 7 41 18 - 7 33 53 - 7 43 26 - 7 31 46 0.25 - 53 0 0 - 7 14 9 0 26 52.3 27 256 -39 - 7 17 51 - 7 10 28 - 7 19 59 - 7 8 20 0.25 - 52 0 0 - 6 50 51 0 26 54.3 26 256 -40 - 6 54 33 - 6 47 10 - 6 56 41 - 6 45 2 0.25 - 51 0 0 - 6 27 42 0 26 56.2 25 255 -41 - 6 31 24 - 6 24 1 - 6 33 32 - 6 21 53 0.25 - 50 0 0 - 6 4 43 0 26 58.0 24 255 -42 - 6 8 24 - 6 1 2 - 6 10 32 - 5 58 54 0.25 - 49 0 0 - 5 41 53 0 26 59.8 23 255 -43 - 5 45 34 - 5 38 12 - 5 47 42 - 5 36 5 0.25 - 48 0 0 - 5 19 14 0 27 1.5 22 255 -44 - 5 22 55 - 5 15 33 - 5 25 2 - 5 13 26 0.25 - 47 0 0 - 4 56 46 0 27 3.1 21 255 -45 - 5 0 26 - 4 53 5 - 5 2 33 - 4 50 58 0.25 - 46 0 0 - 4 34 29 0 27 4.6 20 255 -46 - 4 38 9 - 4 30 49 - 4 40 16 - 4 28 42 0.25 - 45 0 0 - 4 12 24 0 27 6.1 19 255 -47 - 4 16 4 - 4 8 44 - 4 18 11 - 4 6 37 0.25 - 44 0 0 - 3 50 32 0 27 7.5 18 254 -48 - 3 54 11 - 3 46 52 - 3 56 18 - 3 44 45 0.25 - 43 0 0 - 3 28 52 0 27 8.8 17 254 -49 - 3 32 32 - 3 25 13 - 3 34 38 - 3 23 6 0.25 - 42 0 0 - 3 7 26 0 27 10.0 15 254 -50 - 3 11 6 - 3 3 47 - 3 13 12 - 3 1 41 0.26 - 41 0 0 - 2 46 14 0 27 11.1 14 254 -51 - 2 49 53 - 2 42 35 - 2 51 59 - 2 40 29 0.26 - 40 0 0 - 2 25 16 0 27 12.2 13 254 -52 - 2 28 55 - 2 21 38 - 2 31 1 - 2 19 32 0.26 - 39 0 0 - 2 4 33 0 27 13.1 12 254 -53 - 2 8 12 - 2 0 55 - 2 10 18 - 1 58 49 0.26 - 38 0 0 - 1 44 5 0 27 14.0 11 254 -54 - 1 47 43 - 1 40 27 - 1 49 49 - 1 38 22 0.26 - 37 0 0 - 1 23 53 0 27 14.8 10 254 -55 - 1 27 31 - 1 20 15 - 1 29 36 - 1 18 10 0.26 - 36 0 0 - 1 3 56 0 27 15.6 9 254 -56 - 1 7 34 - 1 0 19 - 1 9 39 - 0 58 13 0.27 - 35 0 0 - 0 44 16 0 27 16.2 8 254 -57 - 0 47 53 - 0 40 39 - 0 49 59 - 0 38 34 0.27 - 34 0 0 - 0 24 52 0 27 16.8 7 254 -58 - 0 28 29 - 0 21 16 - 0 30 34 - 0 19 11 0.27 - 33 0 0 - 0 5 46 0 27 17.3 6 254 -59 - 0 9 23 - 0 2 9 - 0 11 27 - 0 0 4 0.28 - 32 0 0 0 13 3 0 27 17.7 5 254 -60 0 9 27 0 16 40 0 7 22 0 18 44 0.29 - 31 0 0 0 31 35 0 27 18.0 4 254 -61 0 27 59 0 35 11 0 25 54 0 37 15 0.30 - 30 0 0 0 49 48 0 27 18.3 3 254 -62 0 46 13 0 53 24 0 44 8 0 55 28 0.32 - 29 0 0 1 7 44 0 27 18.5 2 254 -63 1 4 8 1 11 19 1 2 4 1 13 23 0.37 - 28 0 0 1 25 20 0 27 18.6 1 254 -64 1 21 45 1 28 56 1 19 41 1 30 59 0.55 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 370-184090 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 00 19.6319 DE: -16 01 10.306 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 00 19.6318 DE: -16 01 10.307 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1570) Brunonia asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.02220 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.011", 0.002", 75.179° remarks: * orbital elements for (1570)Brunonia : Mean anomaly = 280.2319162088 deg Arg. of pericenter = 228.1783932352 deg Long. of node = 189.9886550502 deg Inclination = 1.6669111126 deg Eccentricity = 0.0566504211 Semimajor axis = 2.8429923615 AU Perihelion dist = 2.6819356469 AU Mag: H = 12.07, G = 0.15 Epoch of elements : MJD 60640.01635724 TDT (2024 Nov 26.0164) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,0.45,2024,11,26,0.392572,0.058272,-0.220052,15.038985,3.983959,0.005315,0.001607,-0.000001,0.000000 -115.8939,-15.9235,170.93,-20.99,False UCAC4 370-184090,21.00545333,-16.0195294,12.25,11.93,11.76,0.0,0,,21.02843687,-15.9234752,5.77,5.49,0,0,0 1570,Brunonia,17.69,12.347,3.0222,0,0,3.034,11.60,,1.0,0 0,280.0229,2024,11,25,228.1784,189.9887,1.6669,0.05665,2.84299,2.68194,12.07,5.0,0.15 1.288,0.0110,0.0016,75,0.0016,Known errors,0.90,0,-1,-1 20241126_184090,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org