IOTA/IOTA-ES occultation update for (276) Adelheid / UCAC4 419-094676 event on 2021 Mar 11, 08:54 UT Visible from E Canada, USA Summary ------- On 2021 Mar 11 UT, the 124 km diameter asteroid (276) Adelheid will occult a 13.8 mag star in the constellation Scutum for observers along a path across E Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.38 mag to 14.85 mag (the magnitude of the asteroid) for at most 4.4 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: 2021 Mar 11, 08:53 - 2021 Mar 11, 08:56 * geocentric midpoint of event [JD]: 2459284.87136250 * magnitude of target star: 13.83 * magnitude drop [mag]: 1.38 * estimated maximum duration [s]: 4.4 * Moon: 4 % sunlit, 49° distance * Sun: 70° distance * rough path description: E Canada, USA The occultation path -------------------- * approximate projected width [km]: 308 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.018) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.013", 13°) * approx speed of asteroid's shadow [km/s]: 28.2375 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 419-094676 by 276 Adelheid on 2021 Mar 11 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 ' " Longitude Longitude Longitude Longitude - 41 14 37 83 0 0 8 56 16.2 0 160 -3 - 29 45 38 ... .. .. ... .. .. ... .. .. .... - 38 56 14 82 0 0 8 56 16.1 1 162 -3 - 29 1 7 - 50 0 8 ... .. .. - 58 39 24 1.38 - 37 26 14 81 0 0 8 56 15.8 2 164 -3 - 28 40 59 - 47 0 40 ... .. .. - 54 14 32 1.78 - 36 28 56 80 0 0 8 56 15.3 3 165 -3 - 28 37 49 - 44 57 29 - 23 33 47 - 51 13 33 1.93 - 35 54 55 79 0 0 8 56 14.6 4 165 -2 - 28 47 0 - 43 32 39 - 24 9 49 - 49 6 28 2.02 - 35 38 9 78 0 0 8 56 13.8 5 166 -2 - 29 5 31 - 42 35 25 - 24 50 28 - 47 36 46 2.07 - 35 34 35 77 0 0 8 56 12.8 6 166 -2 - 29 31 16 - 41 58 49 - 25 34 47 - 46 34 22 2.10 - 35 41 24 76 0 0 8 56 11.6 7 166 -2 - 30 2 48 - 41 38 10 - 26 22 5 - 45 52 41 -2.13 - 35 56 34 75 0 0 8 56 10.3 8 165 -2 - 30 39 4 - 41 30 11 - 27 11 52 - 45 27 14 -2.15 - 36 18 38 74 0 0 8 56 8.7 9 165 -2 - 31 19 18 - 41 32 28 - 28 3 47 - 45 14 48 -2.16 - 36 46 27 73 0 0 8 56 7.1 10 164 -2 - 32 2 54 - 41 43 16 - 28 57 35 - 45 13 1 -2.17 - 37 19 12 72 0 0 8 56 5.2 11 164 -2 - 32 49 27 - 42 1 13 - 29 53 4 - 45 20 10 -2.18 - 37 56 14 71 0 0 8 56 3.2 12 163 -2 - 33 38 36 - 42 25 20 - 30 50 5 - 45 34 55 -2.19 - 38 37 2 70 0 0 8 56 1.1 13 162 -2 - 34 30 6 - 42 54 48 - 31 48 34 - 45 56 12 -2.20 - 39 21 14 69 0 0 8 55 58.7 14 161 -3 - 35 23 45 - 43 29 1 - 32 48 25 - 46 23 16 -2.21 - 40 8 30 68 0 0 8 55 56.2 15 161 -3 - 36 19 26 - 44 7 29 - 33 49 36 - 46 55 27 -2.21 - 40 58 38 67 0 0 8 55 53.5 15 160 -3 - 37 17 1 - 44 49 50 - 34 52 6 - 47 32 17 -2.22 - 41 51 26 66 0 0 8 55 50.7 16 159 -3 - 38 16 27 - 45 35 46 - 35 55 55 - 48 13 23 -2.22 - 42 46 48 65 0 0 8 55 47.6 17 158 -4 - 39 17 41 - 46 25 4 - 37 1 2 - 48 58 27 -2.23 - 43 44 36 64 0 0 8 55 44.5 18 156 -4 - 40 20 41 - 47 17 33 - 38 7 30 - 49 47 15 -2.23 - 44 44 49 63 0 0 8 55 41.1 19 155 -5 - 41 25 28 - 48 13 7 - 39 15 21 - 50 39 39 -2.24 - 45 47 24 62 0 0 8 55 37.5 19 154 -5 - 42 32 3 - 49 11 42 - 40 24 38 - 51 35 31 -2.24 - 46 52 21 61 0 0 8 55 33.8 20 153 -6 - 43 40 28 - 50 13 16 - 41 35 24 - 52 34 48 -2.24 - 47 59 44 60 0 0 8 55 29.9 20 151 -6 - 44 50 47 - 51 17 48 - 42 47 45 - 53 37 30 -2.25 - 49 9 35 59 0 0 8 55 25.8 21 150 -7 - 46 3 4 - 52 25 22 - 44 1 45 - 54 43 39 -2.25 - 50 21 59 58 0 0 8 55 21.6 22 148 -8 - 47 17 26 - 53 36 3 - 45 17 32 - 55 53 21 -2.26 - 51 37 5 57 0 0 8 55 17.1 22 147 -9 - 48 33 59 - 54 49 58 - 46 35 12 - 57 6 42 -2.26 - 52 55 0 56 0 0 8 55 12.5 23 145 -9 - 49 52 52 - 56 7 18 - 47 54 54 - 58 23 55 -2.26 - 54 15 56 55 0 0 8 55 7.7 23 144 -10 - 51 14 16 - 57 28 15 - 49 16 48 - 59 45 15 -2.27 - 55 40 7 54 0 0 8 55 2.7 23 142 -11 - 52 38 22 - 58 53 7 - 50 41 6 - 61 11 3 -2.27 - 57 7 51 53 0 0 8 54 57.5 23 140 -12 - 54 5 26 - 60 22 16 - 52 8 1 - 62 41 43 -2.28 - 58 39 30 52 0 0 8 54 52.1 24 138 -13 - 55 35 45 - 61 56 8 - 53 37 50 - 64 17 51 -2.28 - 60 15 28 51 0 0 8 54 46.5 24 137 -15 - 57 9 41 - 63 35 19 - 55 10 50 - 66 0 9 -2.29 - 61 56 20 50 0 0 8 54 40.7 24 135 -16 - 58 47 38 - 65 20 33 - 56 47 24 - 67 49 36 -2.29 - 63 42 47 49 0 0 8 54 34.7 23 133 -17 - 60 30 9 - 67 12 50 - 58 28 0 - 69 47 31 -2.30 - 65 35 43 48 0 0 8 54 28.4 23 130 -19 - 62 17 54 - 69 13 31 - 60 13 10 - 71 55 45 -2.31 - 67 36 20 47 0 0 8 54 21.8 23 128 -20 - 64 11 42 - 71 24 27 - 62 3 37 - 74 17 4 -2.31 Latitude Latitude Latitude Latitude - 69 0 0 46 20 50 8 54 17.4 22 127 -22 44 43 23 48 6 30 43 41 28 49 23 36 -2.31 - 70 0 0 45 53 57 8 54 14.3 22 126 -22 44 17 42 47 38 6 43 16 27 48 53 55 -2.31 - 71 0 0 45 28 5 8 54 11.3 22 125 -23 43 52 57 47 10 48 42 52 21 48 25 25 -2.31 - 72 0 0 45 3 13 8 54 8.3 21 124 -24 43 29 9 46 44 36 42 29 9 47 58 6 -2.31 - 73 0 0 44 39 20 8 54 5.4 21 123 -25 43 6 16 46 19 29 42 6 51 47 31 56 -2.31 - 74 0 0 44 16 27 8 54 2.6 21 122 -26 42 44 20 45 55 26 41 45 27 47 6 55 -2.32 - 75 0 0 43 54 33 8 53 59.8 20 121 -26 42 23 19 45 32 26 41 24 56 46 43 0 -2.32 - 76 0 0 43 33 38 8 53 57.1 20 120 -27 42 3 14 45 10 29 41 5 20 46 20 13 -2.32 - 77 0 0 43 13 41 8 53 54.4 19 119 -28 41 44 4 44 49 34 40 46 37 45 58 31 -2.32 - 78 0 0 42 54 42 8 53 51.9 19 118 -29 41 25 49 44 29 42 40 28 49 45 37 54 -2.32 - 79 0 0 42 36 41 8 53 49.4 18 117 -30 41 8 30 44 10 50 40 11 53 45 18 22 -2.33 - 80 0 0 42 19 38 8 53 46.9 18 116 -30 40 52 5 43 53 0 39 55 51 44 59 53 -2.33 - 81 0 0 42 3 32 8 53 44.6 17 115 -31 40 36 35 43 36 10 39 40 42 44 42 28 -2.33 - 82 0 0 41 48 23 8 53 42.4 16 115 -32 40 22 0 43 20 20 39 26 27 44 26 6 -2.33 - 83 0 0 41 34 11 8 53 40.2 16 114 -33 40 8 19 43 5 31 39 13 5 44 10 45 -2.34 - 84 0 0 41 20 56 8 53 38.1 15 113 -34 39 55 33 42 51 40 39 0 35 43 56 27 -2.34 - 85 0 0 41 8 36 8 53 36.1 15 112 -34 39 43 41 42 38 49 38 48 59 43 43 10 -2.34 - 86 0 0 40 57 14 8 53 34.2 14 111 -35 39 32 43 42 26 57 38 38 15 43 30 54 -2.34 - 87 0 0 40 46 47 8 53 32.4 13 111 -36 39 22 38 42 16 3 38 28 24 43 19 39 -2.35 - 88 0 0 40 37 16 8 53 30.6 13 110 -37 39 13 28 42 6 7 38 19 26 43 9 24 -2.35 - 89 0 0 40 28 40 8 53 29.0 12 109 -37 39 5 11 41 57 10 38 11 20 43 0 9 -2.35 - 90 0 0 40 21 1 8 53 27.4 11 108 -38 38 57 48 41 49 11 38 4 6 42 51 54 -2.36 - 91 0 0 40 14 16 8 53 26.0 11 108 -39 38 51 18 41 42 9 37 57 45 42 44 39 -2.36 - 92 0 0 40 8 27 8 53 24.6 10 107 -39 38 45 41 41 36 5 37 52 16 42 38 23 -2.37 - 93 0 0 40 3 33 8 53 23.3 9 106 -40 38 40 58 41 30 58 37 47 39 42 33 6 -2.37 - 94 0 0 39 59 34 8 53 22.2 9 106 -41 38 37 8 41 26 48 37 43 55 42 28 48 -2.38 - 95 0 0 39 56 30 8 53 21.1 8 105 -41 38 34 11 41 23 36 37 41 2 42 25 29 -2.39 - 96 0 0 39 54 21 8 53 20.1 7 104 -42 38 32 7 41 21 20 37 39 1 42 23 8 -2.40 - 97 0 0 39 53 6 8 53 19.2 6 104 -43 38 30 56 41 20 1 37 37 52 42 21 46 -2.41 - 98 0 0 39 52 46 8 53 18.4 6 103 -43 38 30 38 41 19 39 37 37 35 42 21 23 -2.43 - 99 0 0 39 53 20 8 53 17.8 5 102 -44 38 31 12 41 20 14 37 38 9 42 21 57 -2.45 -100 0 0 39 54 49 8 53 17.2 4 102 -44 38 32 39 41 21 45 .. .. .. 42 23 31 -2.48 -101 0 0 39 57 13 8 53 16.7 3 101 -45 38 34 59 41 24 13 .. .. .. 42 26 2 -2.52 -102 0 0 40 0 30 8 53 16.3 3 100 -45 38 38 11 41 27 37 .. .. .. 42 29 31 -2.60 -103 0 0 40 4 43 8 53 16.0 2 100 -46 38 42 16 41 31 58 .. .. .. 42 33 59 -2.73 -104 0 0 40 9 49 8 53 15.8 1 99 -46 38 47 13 41 37 15 .. .. .. 42 39 25 -3.07 -105 0 0 40 15 50 8 53 15.8 0 98 -47 38 53 3 41 43 29 .. .. .. .. .. .. -5.82 Uncertainty in time = +/- 2 secs Prediction of 2021 Feb 6.0 Data for the target star ------------------------ * name: UCAC4 419-094676 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 46 34.9625 DE: -06 19 58.886 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 46 34.9625 DE: -06 19 58.886 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 13.8 * B mag [mag]: 16.3 * Diameter [mas]: 0.30 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (276) Adelheid asteroid class: approx. diameter [km]: 124 approx. diameter ["]: 0.049 distance from Earth [AU]: 3.50720 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2020 Nov 13 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): 0.018", 0.013", 13° remarks: * orbital elements for (276)Adelheid : Mean anomaly = 146.70402379 deg Arg. of pericenter = 265.13902368 deg Long. of node = 211.14650162 deg Inclination = 21.61148280 deg Eccentricity = 0.06669448 Semimajor axis = 3.11670737 AU Perihelion dist = 2.90884018 AU Mag: H = 8.70, G = 0.15 Epoch of elements : MJD 59284.37136667 TDT (2021 Mar 11.3714) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532020Nov13,4.4,2021,3,11,8.9127,-0.40199,0.82104,14.34113,6.95367,-0.00559,0.00015,0.00000,0.00000 -21.0073,-6.3118,48.81,-3.56,False UCAC4 419-094676,18.77637846,-6.3330239,16.30,13.83,12.50,0.3,0,,18.79491690,-6.3117967 276,Adelheid,14.85,124.8,3.5072,0,0,2.412,17.44,,6.4 0,146.6375,2021,3,11,265.1390,211.1465,21.6115,0.06669,3.11671,2.90884,8.65,5.0,0.15 1.337,0.0183,0.0133,13,0.0165,Known errors,-1.00,-1,-1,-1 20210311_094676,59251.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2021 Feb 06, 22:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org