IOTA/IOTA-ES occultation update for (2856) Roser / TYC 7441-00593-1 event on 2024 Oct 03, 01:34 UT Visible from Summary ------- On 2024 Oct 03 UT, the 22.6338206720522 km diameter asteroid (2856) Roser will occult a 7.3 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.35 mag to 16.67 mag (the magnitude of the asteroid) for at most 2.530 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: 71 * date and approx. time of event: 2024 Oct 03, 01:26 - 2024 Oct 03, 01:42 * geocentric midpoint of event [JD]: 2460586.56570284 * magnitude of target star: 7.32 * magnitude drop [mag]: 9.35 * estimated maximum duration [s]: 2.530 * Moon: 0 % sunlit, 104° distance * Sun: 107° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 34 * 1 sigma uncertainty interval [path widths]: +/- 0.82 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 76°) * approx speed of asteroid's shadow [km/s]: 9.4545 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7441-00593-1 by 2856 Roser on 2024 Oct 3 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 -100 58 54 59 0 0 1 42 35.8 1 175 -12 -100 41 39 -101 16 13 -100 13 19 -101 44 51 .... -100 51 5 58 0 0 1 42 35.5 2 175 -13 -100 34 20 -101 7 53 -100 6 50 -101 35 39 0.55 -100 45 30 57 0 0 1 42 35.0 3 175 -13 -100 29 14 -101 1 49 -100 2 31 -101 28 48 0.71 -100 41 59 56 0 0 1 42 34.1 4 175 -13 -100 26 9 -100 57 52 -100 0 9 -101 24 7 0.77 -100 40 22 55 0 0 1 42 33.0 5 175 -13 -100 24 56 -100 55 50 - 99 59 36 -101 21 24 0.81 -100 40 29 54 0 0 1 42 31.6 6 175 -14 -100 25 26 -100 55 35 -100 0 43 -101 20 31 -0.83 -100 42 13 53 0 0 1 42 29.9 7 175 -14 -100 27 31 -100 56 58 -100 3 23 -101 21 19 -0.85 -100 45 28 52 0 0 1 42 27.9 8 175 -14 -100 31 6 -100 59 53 -100 7 30 -101 23 41 -0.86 -100 50 7 51 0 0 1 42 25.7 9 175 -14 -100 36 3 -101 4 13 -100 12 57 -101 27 31 -0.87 -100 56 5 50 0 0 1 42 23.1 10 175 -14 -100 42 18 -101 9 54 -100 19 40 -101 32 43 -0.88 -101 3 17 49 0 0 1 42 20.3 11 175 -14 -100 49 46 -101 16 50 -100 27 35 -101 39 13 -0.88 -101 11 40 48 0 0 1 42 17.2 11 175 -14 -100 58 24 -101 24 58 -100 36 37 -101 46 56 -0.89 -101 21 10 47 0 0 1 42 13.8 12 175 -15 -101 8 8 -101 34 14 -100 46 44 -101 55 49 -0.89 -101 31 43 46 0 0 1 42 10.1 13 174 -15 -101 18 54 -101 44 34 -100 57 51 -102 5 47 -0.89 -101 43 18 45 0 0 1 42 6.1 14 174 -15 -101 30 41 -101 55 56 -101 9 58 -102 16 49 -0.90 -101 55 50 44 0 0 1 42 1.9 15 174 -15 -101 43 24 -102 8 17 -101 23 0 -102 28 51 -0.90 -102 9 19 43 0 0 1 41 57.3 16 174 -15 -101 57 4 -102 21 35 -101 36 57 -102 41 51 -0.90 -102 23 42 42 0 0 1 41 52.5 17 174 -14 -102 11 37 -102 35 48 -101 51 46 -102 55 48 -0.90 -102 38 57 41 0 0 1 41 47.4 18 173 -14 -102 27 2 -102 50 55 -102 7 27 -103 10 39 -0.91 -102 55 5 40 0 0 1 41 42.0 19 173 -14 -102 43 18 -103 6 53 -102 23 57 -103 26 23 -0.91 -103 12 2 39 0 0 1 41 36.3 20 173 -14 -103 0 23 -103 23 43 -102 41 15 -103 43 0 -0.91 -103 29 49 38 0 0 1 41 30.3 21 172 -14 -103 18 17 -103 41 22 -102 59 22 -104 0 26 -0.91 -103 48 24 37 0 0 1 41 24.1 22 172 -14 -103 36 59 -103 59 50 -103 18 15 -104 18 43 -0.91 -104 7 47 36 0 0 1 41 17.5 23 172 -14 -103 56 29 -104 19 7 -103 37 55 -104 37 50 -0.91 -104 27 58 35 0 0 1 41 10.7 24 171 -13 -104 16 46 -104 39 12 -103 58 21 -104 57 45 -0.91 -104 48 56 34 0 0 1 41 3.5 25 171 -13 -104 37 49 -105 0 5 -104 19 34 -105 18 30 -0.92 -105 10 42 33 0 0 1 40 56.1 26 170 -13 -104 59 39 -105 21 46 -104 41 32 -105 40 2 -0.92 -105 33 15 32 0 0 1 40 48.4 27 170 -13 -105 22 17 -105 44 14 -105 4 16 -106 2 24 -0.92 -105 56 35 31 0 0 1 40 40.4 28 169 -12 -105 45 41 -106 7 31 -105 27 47 -106 25 34 -0.92 -106 20 43 30 0 0 1 40 32.2 29 169 -12 -106 9 52 -106 31 36 -105 52 4 -106 49 33 -0.92 -106 45 40 29 0 0 1 40 23.6 30 168 -12 -106 34 52 -106 56 29 -106 17 8 -107 14 22 -0.92 -107 11 26 28 0 0 1 40 14.7 30 168 -11 -107 0 40 -107 22 13 -106 43 1 -107 40 2 -0.93 -107 38 2 27 0 0 1 40 5.6 31 167 -11 -107 27 18 -107 48 47 -107 9 42 -108 6 32 -0.93 -108 5 29 26 0 0 1 39 56.1 32 166 -10 -107 54 47 -108 16 12 -107 37 13 -108 33 55 -0.93 -108 33 48 25 0 0 1 39 46.4 33 166 -10 -108 23 7 -108 44 30 -108 5 35 -109 2 12 -0.93 -109 3 0 24 0 0 1 39 36.4 34 165 -10 -108 52 20 -109 13 42 -108 34 49 -109 31 23 -0.93 -109 33 8 23 0 0 1 39 26.0 35 164 -9 -109 22 28 -109 43 50 -109 4 57 -110 1 30 -0.93 -110 4 12 22 0 0 1 39 15.4 36 164 -8 -109 53 32 -110 14 54 -109 36 1 -110 32 35 -0.94 -110 36 15 21 0 0 1 39 4.4 36 163 -8 -110 25 34 -110 46 58 -110 8 1 -111 4 41 -0.94 -111 9 18 20 0 0 1 38 53.2 37 162 -7 -110 58 36 -111 20 3 -110 41 1 -111 37 48 -0.94 -111 43 25 19 0 0 1 38 41.6 38 161 -7 -111 32 40 -111 54 11 -111 15 3 -112 12 0 -0.94 -112 18 37 18 0 0 1 38 29.8 39 160 -6 -112 7 50 -112 29 26 -111 50 9 -112 47 19 -0.94 -112 54 58 17 0 0 1 38 17.6 39 159 -5 -112 44 8 -113 5 50 -112 26 21 -113 23 48 -0.94 -113 32 30 16 0 0 1 38 5.1 40 158 -5 -113 21 37 -113 43 26 -113 3 44 -114 1 31 -0.95 -114 11 19 15 0 0 1 37 52.3 41 157 -4 -114 0 20 -114 22 19 -113 42 21 -114 40 31 -0.95 -114 51 26 14 0 0 1 37 39.1 41 156 -3 -114 40 23 -115 2 31 -114 22 15 -115 20 52 -0.95 -115 32 57 13 0 0 1 37 25.6 42 155 -2 -115 21 48 -115 44 8 -115 3 31 -116 2 39 -0.95 -116 15 57 12 0 0 1 37 11.8 42 154 -2 -116 4 41 -116 27 15 -115 46 14 -116 45 57 -0.96 -117 0 31 11 0 0 1 36 57.6 43 153 -1 -116 49 8 -117 11 57 -116 30 28 -117 30 52 -0.96 -117 46 45 10 0 0 1 36 43.0 44 151 0 -117 35 13 -117 58 20 -117 16 20 -118 17 30 -0.96 -118 34 47 9 0 0 1 36 28.1 44 150 1 -118 23 5 -118 46 32 -118 3 56 -119 5 58 -0.96 -119 24 44 8 0 0 1 36 12.8 44 149 2 -119 12 51 -119 36 39 -118 53 24 -119 56 25 -0.97 -120 16 45 7 0 0 1 35 57.1 45 147 3 -120 4 40 -120 28 53 -119 44 53 -120 48 59 -0.97 -121 11 0 6 0 0 1 35 41.0 45 146 4 -120 58 41 -121 23 22 -120 38 32 -121 43 52 -0.97 -122 7 41 5 0 0 1 35 24.4 45 144 5 -121 55 6 -122 20 19 -121 34 32 -122 41 16 -0.97 -123 7 1 4 0 0 1 35 7.4 45 143 6 -122 54 9 -123 19 58 -122 33 6 -123 41 26 -0.98 -124 9 18 3 0 0 1 34 49.9 46 141 7 -123 56 5 -124 22 35 -123 34 30 -124 44 37 -0.98 -125 14 48 2 0 0 1 34 31.9 46 140 9 -125 1 13 -125 28 29 -124 39 0 -125 51 11 -0.98 -126 23 56 1 0 0 1 34 13.3 45 138 10 -126 9 54 -126 38 4 -125 46 59 -127 1 32 -0.98 -127 37 8 0 0 0 1 33 54.0 45 136 11 -127 22 35 -127 51 47 -126 58 51 -128 16 10 -0.99 -128 54 59 - 1 0 0 1 33 34.1 45 135 13 -128 39 49 -129 10 15 -128 15 7 -129 35 41 -0.99 Latitude Latitude Latitude Latitude -129 0 0 - 1 3 45 1 33 32.9 45 134 13 - 1 15 4 - 0 52 23 - 1 33 36 - 0 33 34 -0.99 -130 0 0 - 1 47 15 1 33 17.9 45 133 14 - 1 58 23 - 1 36 4 - 2 16 37 - 1 17 34 -0.99 -131 0 0 - 2 28 37 1 33 3.3 44 132 15 - 2 39 35 - 2 17 37 - 2 57 32 - 1 59 24 -0.99 -132 0 0 - 3 7 55 1 32 49.0 44 131 16 - 3 18 43 - 2 57 5 - 3 36 25 - 2 39 9 -0.99 -133 0 0 - 3 45 14 1 32 35.0 44 130 17 - 3 55 53 - 3 34 33 - 4 13 20 - 3 16 52 -0.99 -134 0 0 - 4 20 37 1 32 21.3 43 129 18 - 4 31 8 - 4 10 4 - 4 48 21 - 3 52 37 -1.00 -135 0 0 - 4 54 8 1 32 7.9 43 128 19 - 5 4 30 - 4 43 43 - 5 21 31 - 4 26 29 -1.00 -136 0 0 - 5 25 49 1 31 54.8 42 127 21 - 5 36 5 - 5 15 32 - 5 52 54 - 4 58 31 -1.00 -137 0 0 - 5 55 45 1 31 42.0 42 126 22 - 6 5 54 - 5 45 35 - 6 22 31 - 5 28 45 -1.00 -138 0 0 - 6 23 58 1 31 29.5 41 126 23 - 6 34 0 - 6 13 54 - 6 50 27 - 5 57 16 -1.00 -139 0 0 - 6 50 31 1 31 17.3 41 125 24 - 7 0 27 - 6 40 33 - 7 16 44 - 6 24 4 -1.00 -140 0 0 - 7 15 26 1 31 5.4 40 124 25 - 7 25 16 - 7 5 33 - 7 41 24 - 6 49 14 -1.00 -141 0 0 - 7 38 45 1 30 53.7 39 124 26 - 7 48 30 - 7 28 58 - 8 4 30 - 7 12 47 -1.00 -142 0 0 - 8 0 31 1 30 42.3 39 123 27 - 8 10 11 - 7 50 49 - 8 26 4 - 7 34 46 -1.00 -143 0 0 - 8 20 46 1 30 31.2 38 122 28 - 8 30 22 - 8 11 8 - 8 46 7 - 7 55 13 -1.00 -144 0 0 - 8 39 31 1 30 20.4 37 122 29 - 8 49 3 - 8 29 58 - 9 4 41 - 8 14 9 -1.00 -145 0 0 - 8 56 49 1 30 9.8 36 122 30 - 9 6 17 - 8 47 19 - 9 21 49 - 8 31 37 -1.00 -146 0 0 - 9 12 40 1 29 59.5 36 121 31 - 9 22 5 - 9 3 14 - 9 37 31 - 8 47 38 -1.00 -147 0 0 - 9 27 7 1 29 49.4 35 121 32 - 9 36 29 - 9 17 44 - 9 51 50 - 9 2 14 -1.00 -148 0 0 - 9 40 11 1 29 39.6 34 120 33 - 9 49 30 - 9 30 51 -10 4 46 - 9 15 25 -1.00 -149 0 0 - 9 51 52 1 29 30.0 33 120 34 -10 1 8 - 9 42 35 -10 16 21 - 9 27 13 -1.00 -150 0 0 -10 2 13 1 29 20.7 33 120 35 -10 11 27 - 9 52 58 -10 26 35 - 9 37 40 -1.00 -151 0 0 -10 11 14 1 29 11.6 32 120 36 -10 20 25 -10 2 0 -10 35 30 - 9 46 46 -1.00 -152 0 0 -10 18 55 1 29 2.8 31 120 37 -10 28 5 -10 9 44 -10 43 7 - 9 54 32 -1.00 -153 0 0 -10 25 18 1 28 54.2 30 119 38 -10 34 26 -10 16 8 -10 49 26 -10 1 0 -1.00 -154 0 0 -10 30 23 1 28 45.8 29 119 39 -10 39 30 -10 21 15 -10 54 28 -10 6 8 -1.00 -155 0 0 -10 34 12 1 28 37.7 28 119 40 -10 43 18 -10 25 4 -10 58 14 -10 9 59 -1.00 -156 0 0 -10 36 44 1 28 29.9 28 119 41 -10 45 49 -10 27 37 -11 0 44 -10 12 33 -1.00 -157 0 0 -10 37 59 1 28 22.2 27 119 42 -10 47 4 -10 28 53 -11 1 58 -10 13 50 -1.00 -158 0 0 -10 37 59 1 28 14.8 26 119 43 -10 47 3 -10 28 53 -11 1 57 -10 13 51 -1.00 -159 0 0 -10 36 43 1 28 7.7 25 119 44 -10 45 47 -10 27 37 -11 0 41 -10 12 35 -1.00 -160 0 0 -10 34 12 1 28 0.8 24 119 45 -10 43 16 -10 25 6 -10 58 10 -10 10 4 -1.00 -161 0 0 -10 30 25 1 27 54.1 23 119 46 -10 39 30 -10 21 19 -10 54 24 -10 6 16 -1.00 -162 0 0 -10 25 23 1 27 47.7 22 119 47 -10 34 28 -10 16 16 -10 49 24 -10 1 12 -1.00 -163 0 0 -10 19 5 1 27 41.5 21 119 48 -10 28 11 -10 9 57 -10 43 8 - 9 54 51 -0.99 -164 0 0 -10 11 31 1 27 35.5 20 119 49 -10 20 38 -10 2 22 -10 35 37 - 9 47 15 -0.99 -165 0 0 -10 2 41 1 27 29.9 19 119 50 -10 11 50 - 9 53 30 -10 26 50 - 9 38 21 -0.99 -166 0 0 - 9 52 34 1 27 24.4 18 119 51 -10 1 45 - 9 43 22 -10 16 48 - 9 28 10 -0.99 -167 0 0 - 9 41 11 1 27 19.2 17 119 52 - 9 50 23 - 9 31 57 -10 5 29 - 9 16 42 -0.99 -168 0 0 - 9 28 30 1 27 14.3 16 119 53 - 9 37 44 - 9 19 14 - 9 52 54 - 9 3 55 -0.99 -169 0 0 - 9 14 30 1 27 9.6 15 119 54 - 9 23 47 - 9 5 12 - 9 39 1 - 8 49 50 -0.99 -170 0 0 - 8 59 12 1 27 5.2 14 119 55 - 9 8 32 - 8 49 52 - 9 23 49 - 8 34 25 -0.99 -171 0 0 - 8 42 35 1 27 1.1 13 119 56 - 8 51 57 - 8 33 11 - 9 7 19 - 8 17 39 -0.99 -172 0 0 - 8 24 36 1 26 57.2 12 120 57 - 8 34 1 - 8 15 9 - 8 49 29 - 7 59 33 -0.99 -173 0 0 - 8 5 16 1 26 53.6 11 120 58 - 8 14 45 - 7 55 46 - 8 30 18 - 7 40 4 -1.00 -174 0 0 - 7 44 34 1 26 50.3 10 120 59 - 7 54 6 - 7 35 0 - 8 9 44 - 7 19 11 -1.00 -175 0 0 - 7 22 27 1 26 47.3 9 120 61 - 7 32 3 - 7 12 49 - 7 47 48 - 6 56 54 -1.00 -176 0 0 - 6 58 56 1 26 44.6 8 120 62 - 7 8 36 - 6 49 14 - 7 24 28 - 6 33 11 -1.00 -177 0 0 - 6 33 58 1 26 42.3 7 120 63 - 6 43 42 - 6 24 11 - 6 59 42 - 6 8 1 -1.01 -178 0 0 - 6 7 32 1 26 40.2 6 120 64 - 6 17 21 - 5 57 40 - 6 33 29 - 5 41 22 -1.02 -179 0 0 - 5 39 36 1 26 38.4 5 120 65 - 5 49 31 - 5 29 40 - 6 5 47 - 5 13 13 -1.03 -180 0 0 - 5 10 10 1 26 37.0 4 120 66 - 5 20 10 - 5 0 7 - 5 36 35 - 4 43 31 -1.05 179 0 0 - 4 39 10 1 26 36.0 3 120 67 - 4 49 17 - 4 29 2 - 5 5 51 - 4 12 16 -1.10 178 0 0 - 4 6 36 1 26 35.3 2 120 68 - 4 16 49 - 3 56 21 - 4 33 33 - 3 39 25 -1.20 177 0 0 - 3 32 25 1 26 35.0 0 121 69 - 3 42 44 - 3 22 4 - 3 59 40 - 3 4 56 -1.91 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 7441-00593-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 08 26.0055 DE: -30 34 19.389 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 08 26.0054 DE: -30 34 19.390 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 7.3 * B mag [mag]: 8.5 * Diameter [mas]: 0.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2856) Roser asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.57870 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.019", 0.002", 75.639° remarks: * orbital elements for (2856)Roser : Mean anomaly = 102.2622663002 deg Arg. of pericenter = 195.9283405658 deg Long. of node = 16.7738109195 deg Inclination = 9.8941899418 deg Eccentricity = 0.0082053906 Semimajor axis = 3.0269989087 AU Perihelion dist = 3.0021612003 AU Mag: H = 11.26, G = 0.15 Epoch of elements : MJD 60586.06570300 TDT (2024 Oct 03.0657) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,2.53,2024,10,3,1.576868,-0.522655,0.466102,3.550590,3.983770,0.005355,0.001512,0.000001,0.000000 -93.4120,-30.5014,153.60,-4.10,False TYC 7441-00593-1,20.14055711,-30.5720525,8.46,7.32,6.70,0.7,0,,20.16642605,-30.5014155,9.35,9.52,0,0,0 2856,Roser,16.67,23.943,2.5787,0,0,0.937,13.59,,1.8,0 0,102.0628,2024,10,2,195.9283,16.7738,9.8942,0.00821,3.02700,3.00216,11.26,5.0,0.15 1.823,0.0187,0.0020,76,0.0106,Known errors,1.00,0,-1,-1 20241003_0593-1,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org