IOTA/IOTA-ES occultation update for (335) Roberta / UCAC4 376-176867 event on 2024 Nov 30, 03:49 UT Visible from Summary ------- On 2024 Nov 30 UT, the 95.632 km diameter asteroid (335) Roberta will occult a 12.0 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 1.95 mag to 13.74 mag (the magnitude of the asteroid) for at most 3.540 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 Nov 30, 03:45 - 2024 Nov 30, 03:53 * geocentric midpoint of event [JD]: 2460644.65930641 * magnitude of target star: 11.99 * magnitude drop [mag]: 1.95 * estimated maximum duration [s]: 3.540 * Moon: 1 % sunlit, 89° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 99 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 76°) * approx speed of asteroid's shadow [km/s]: 27.0111 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 376-176867 by 335 Roberta on 2024 Nov 30 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 112 0 0 - 2 18 4 3 45 36.3 0 105 69 - 2 45 49 - 1 50 14 - 2 48 11 - 1 47 52 .... 113 0 0 - 2 33 52 3 45 36.3 1 105 69 - 3 1 35 - 2 6 5 - 3 3 57 - 2 3 42 -0.08 114 0 0 - 2 49 17 3 45 36.5 2 105 70 - 3 16 58 - 2 21 33 - 3 19 20 - 2 19 11 -0.17 115 0 0 - 3 4 21 3 45 36.7 3 105 71 - 3 31 59 - 2 36 39 - 3 34 21 - 2 34 17 -0.20 116 0 0 - 3 19 2 3 45 37.0 4 105 71 - 3 46 38 - 2 51 22 - 3 49 0 - 2 49 1 -0.22 117 0 0 - 3 33 21 3 45 37.4 5 105 71 - 4 0 55 - 3 5 43 - 4 3 16 - 3 3 22 -0.23 118 0 0 - 3 47 17 3 45 37.8 6 105 72 - 4 14 48 - 3 19 42 - 4 17 9 - 3 17 20 -0.24 119 0 0 - 4 0 50 3 45 38.3 7 105 72 - 4 28 19 - 3 33 17 - 4 30 40 - 3 30 55 -0.24 120 0 0 - 4 13 59 3 45 38.9 8 104 72 - 4 41 27 - 3 46 29 - 4 43 47 - 3 44 7 -0.24 121 0 0 - 4 26 46 3 45 39.6 9 104 73 - 4 54 11 - 3 59 17 - 4 56 31 - 3 56 56 -0.25 122 0 0 - 4 39 9 3 45 40.4 10 104 73 - 5 6 32 - 4 11 42 - 5 8 52 - 4 9 21 -0.25 123 0 0 - 4 51 8 3 45 41.2 11 104 73 - 5 18 29 - 4 23 43 - 5 20 49 - 4 21 23 -0.25 124 0 0 - 5 2 43 3 45 42.1 13 104 73 - 5 30 2 - 4 35 20 - 5 32 22 - 4 33 0 -0.25 125 0 0 - 5 13 54 3 45 43.1 14 104 73 - 5 41 12 - 4 46 34 - 5 43 31 - 4 44 13 -0.26 126 0 0 - 5 24 42 3 45 44.1 15 104 73 - 5 51 57 - 4 57 23 - 5 54 16 - 4 55 3 -0.26 127 0 0 - 5 35 5 3 45 45.3 16 104 73 - 6 2 18 - 5 7 48 - 6 4 37 - 5 5 28 -0.26 128 0 0 - 5 45 3 3 45 46.5 17 104 73 - 6 12 15 - 5 17 48 - 6 14 34 - 5 15 28 -0.26 129 0 0 - 5 54 37 3 45 47.7 18 104 72 - 6 21 48 - 5 27 24 - 6 24 7 - 5 25 4 -0.26 130 0 0 - 6 3 47 3 45 49.1 19 104 72 - 6 30 56 - 5 36 35 - 6 33 14 - 5 34 16 -0.26 131 0 0 - 6 12 32 3 45 50.5 20 104 72 - 6 39 39 - 5 45 21 - 6 41 57 - 5 43 2 -0.26 132 0 0 - 6 20 52 3 45 52.0 21 104 71 - 6 47 57 - 5 53 43 - 6 50 16 - 5 51 24 -0.26 133 0 0 - 6 28 47 3 45 53.5 22 103 71 - 6 55 51 - 6 1 40 - 6 58 10 - 5 59 21 -0.26 134 0 0 - 6 36 17 3 45 55.1 23 103 70 - 7 3 20 - 6 9 11 - 7 5 39 - 6 6 52 -0.26 135 0 0 - 6 43 23 3 45 56.8 24 103 70 - 7 10 24 - 6 16 18 - 7 12 42 - 6 13 59 -0.26 136 0 0 - 6 50 3 3 45 58.6 25 103 69 - 7 17 3 - 6 22 59 - 7 19 21 - 6 20 40 -0.27 137 0 0 - 6 56 18 3 46 0.4 26 103 68 - 7 23 17 - 6 29 15 - 7 25 35 - 6 26 56 -0.27 138 0 0 - 7 2 7 3 46 2.3 27 103 68 - 7 29 5 - 6 35 6 - 7 31 23 - 6 32 47 -0.27 139 0 0 - 7 7 31 3 46 4.3 28 103 67 - 7 34 28 - 6 40 31 - 7 36 46 - 6 38 12 -0.27 140 0 0 - 7 12 30 3 46 6.3 29 103 66 - 7 39 26 - 6 45 30 - 7 41 44 - 6 43 12 -0.27 141 0 0 - 7 17 3 3 46 8.4 30 103 66 - 7 43 59 - 6 50 5 - 7 46 17 - 6 47 46 -0.27 142 0 0 - 7 21 11 3 46 10.5 31 103 65 - 7 48 6 - 6 54 13 - 7 50 24 - 6 51 55 -0.27 143 0 0 - 7 24 54 3 46 12.7 32 103 64 - 7 51 47 - 6 57 56 - 7 54 5 - 6 55 38 -0.27 144 0 0 - 7 28 10 3 46 15.0 33 103 63 - 7 55 4 - 7 1 13 - 7 57 21 - 6 58 55 -0.27 145 0 0 - 7 31 1 3 46 17.3 34 103 62 - 7 57 54 - 7 4 5 - 8 0 11 - 7 1 47 -0.27 146 0 0 - 7 33 26 3 46 19.7 35 103 62 - 8 0 19 - 7 6 31 - 8 2 36 - 7 4 12 -0.27 147 0 0 - 7 35 26 3 46 22.2 35 103 61 - 8 2 18 - 7 8 30 - 8 4 36 - 7 6 12 -0.27 148 0 0 - 7 37 0 3 46 24.7 36 103 60 - 8 3 52 - 7 10 4 - 8 6 9 - 7 7 46 -0.27 149 0 0 - 7 38 8 3 46 27.3 37 103 59 - 8 4 59 - 7 11 13 - 8 7 17 - 7 8 54 -0.27 150 0 0 - 7 38 50 3 46 29.9 38 103 58 - 8 5 42 - 7 11 55 - 8 7 59 - 7 9 37 -0.27 151 0 0 - 7 39 6 3 46 32.6 39 103 57 - 8 5 58 - 7 12 11 - 8 8 15 - 7 9 53 -0.27 152 0 0 - 7 38 57 3 46 35.3 40 103 57 - 8 5 48 - 7 12 2 - 8 8 6 - 7 9 44 -0.27 153 0 0 - 7 38 21 3 46 38.1 41 103 56 - 8 5 13 - 7 11 26 - 8 7 31 - 7 9 8 -0.27 154 0 0 - 7 37 20 3 46 41.0 42 103 55 - 8 4 12 - 7 10 25 - 8 6 30 - 7 8 6 -0.27 155 0 0 - 7 35 53 3 46 43.9 43 103 54 - 8 2 45 - 7 8 57 - 8 5 3 - 7 6 39 -0.27 156 0 0 - 7 34 0 3 46 46.9 44 103 53 - 8 0 53 - 7 7 4 - 8 3 10 - 7 4 46 -0.27 157 0 0 - 7 31 41 3 46 49.9 45 104 52 - 7 58 34 - 7 4 44 - 8 0 52 - 7 2 26 -0.27 158 0 0 - 7 28 56 3 46 53.0 46 104 51 - 7 55 50 - 7 1 59 - 7 58 7 - 6 59 40 -0.27 159 0 0 - 7 25 45 3 46 56.1 47 104 50 - 7 52 39 - 6 58 47 - 7 54 57 - 6 56 29 -0.27 160 0 0 - 7 22 8 3 46 59.3 48 104 49 - 7 49 3 - 6 55 10 - 7 51 21 - 6 52 51 -0.27 161 0 0 - 7 18 6 3 47 2.5 49 104 48 - 7 45 2 - 6 51 6 - 7 47 19 - 6 48 48 -0.27 162 0 0 - 7 13 37 3 47 5.8 50 105 47 - 7 40 34 - 6 46 37 - 7 42 52 - 6 44 18 -0.27 163 0 0 - 7 8 43 3 47 9.1 51 105 46 - 7 35 41 - 6 41 41 - 7 37 58 - 6 39 23 -0.27 164 0 0 - 7 3 22 3 47 12.5 52 105 45 - 7 30 21 - 6 36 20 - 7 32 39 - 6 34 1 -0.27 165 0 0 - 6 57 36 3 47 15.9 53 106 44 - 7 24 36 - 6 30 33 - 7 26 55 - 6 28 14 -0.27 166 0 0 - 6 51 24 3 47 19.4 54 106 44 - 7 18 26 - 6 24 20 - 7 20 44 - 6 22 1 -0.27 167 0 0 - 6 44 47 3 47 22.9 55 106 43 - 7 11 49 - 6 17 41 - 7 14 8 - 6 15 22 -0.27 168 0 0 - 6 37 43 3 47 26.5 56 107 42 - 7 4 47 - 6 10 36 - 7 7 6 - 6 8 17 -0.27 169 0 0 - 6 30 14 3 47 30.1 57 107 41 - 6 57 20 - 6 3 6 - 6 59 38 - 6 0 46 -0.27 170 0 0 - 6 22 20 3 47 33.7 58 108 40 - 6 49 27 - 5 55 9 - 6 51 45 - 5 52 50 -0.27 171 0 0 - 6 14 0 3 47 37.4 58 108 39 - 6 41 8 - 5 46 48 - 6 43 27 - 5 44 28 -0.27 172 0 0 - 6 5 14 3 47 41.2 59 109 38 - 6 32 24 - 5 38 0 - 6 34 43 - 5 35 41 -0.27 173 0 0 - 5 56 3 3 47 44.9 60 110 37 - 6 23 14 - 5 28 47 - 6 25 34 - 5 26 27 -0.27 174 0 0 - 5 46 26 3 47 48.7 61 111 36 - 6 13 40 - 5 19 9 - 6 15 59 - 5 16 49 -0.27 175 0 0 - 5 36 24 3 47 52.6 62 112 35 - 6 3 40 - 5 9 5 - 6 5 59 - 5 6 45 -0.27 176 0 0 - 5 25 57 3 47 56.5 63 112 34 - 5 53 15 - 4 58 36 - 5 55 34 - 4 56 16 -0.27 177 0 0 - 5 15 5 3 48 0.4 64 113 33 - 5 42 24 - 4 47 42 - 5 44 44 - 4 45 21 -0.27 178 0 0 - 5 3 48 3 48 4.4 65 115 32 - 5 31 9 - 4 36 23 - 5 33 29 - 4 34 2 -0.27 179 0 0 - 4 52 6 3 48 8.4 65 116 31 - 5 19 29 - 4 24 38 - 5 21 49 - 4 22 18 -0.27 -180 0 0 - 4 39 59 3 48 12.4 66 117 30 - 5 7 24 - 4 12 29 - 5 9 45 - 4 10 8 -0.27 -179 0 0 - 4 27 27 3 48 16.5 67 119 29 - 4 54 55 - 3 59 55 - 4 57 16 - 3 57 34 -0.27 -178 0 0 - 4 14 31 3 48 20.5 68 120 28 - 4 42 1 - 3 46 57 - 4 44 22 - 3 44 36 -0.27 -177 0 0 - 4 1 11 3 48 24.7 69 122 27 - 4 28 43 - 3 33 34 - 4 31 4 - 3 31 13 -0.27 -176 0 0 - 3 47 26 3 48 28.8 69 124 26 - 4 15 1 - 3 19 47 - 4 17 22 - 3 17 25 -0.27 -175 0 0 - 3 33 17 3 48 33.0 70 126 25 - 4 0 54 - 3 5 36 - 4 3 16 - 3 3 14 -0.27 -174 0 0 - 3 18 44 3 48 37.2 71 128 24 - 3 46 24 - 2 51 1 - 3 48 46 - 2 48 39 -0.27 -173 0 0 - 3 3 48 3 48 41.4 71 130 22 - 3 31 30 - 2 36 2 - 3 33 52 - 2 33 40 -0.27 -172 0 0 - 2 48 28 3 48 45.7 72 133 21 - 3 16 13 - 2 20 39 - 3 18 35 - 2 18 17 -0.27 -171 0 0 - 2 32 45 3 48 49.9 72 136 20 - 3 0 32 - 2 4 54 - 3 2 54 - 2 2 31 -0.27 -170 0 0 - 2 16 39 3 48 54.2 73 139 19 - 2 44 29 - 1 48 45 - 2 46 51 - 1 46 22 -0.27 -169 0 0 - 2 0 9 3 48 58.5 73 142 18 - 2 28 2 - 1 32 13 - 2 30 25 - 1 29 50 -0.27 -168 0 0 - 1 43 18 3 49 2.9 74 145 17 - 2 11 13 - 1 15 19 - 2 13 36 - 1 12 55 -0.27 -167 0 0 - 1 26 4 3 49 7.2 74 148 16 - 1 54 1 - 0 58 2 - 1 56 24 - 0 55 38 -0.27 -166 0 0 - 1 8 27 3 49 11.6 74 152 15 - 1 36 28 - 0 40 23 - 1 38 51 - 0 37 59 -0.27 -165 0 0 - 0 50 29 3 49 15.9 75 156 14 - 1 18 33 - 0 22 22 - 1 20 56 - 0 19 58 -0.27 -164 0 0 - 0 32 10 3 49 20.3 75 160 13 - 1 0 16 - 0 4 0 - 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99 0 0 25 23 43 3 52 58.6 19 243 -55 24 54 47 25 52 44 24 52 19 25 55 12 -0.27 - 98 0 0 25 45 49 3 53 0.0 18 243 -56 25 16 54 26 14 47 25 14 27 26 17 15 -0.27 - 97 0 0 26 7 38 3 53 1.2 17 244 -57 25 38 46 26 36 34 25 36 19 26 39 3 -0.27 - 96 0 0 26 29 12 3 53 2.3 16 244 -58 26 0 22 26 58 6 25 57 55 27 0 34 -0.27 - 95 0 0 26 50 30 3 53 3.4 15 244 -59 26 21 42 27 19 21 26 19 15 27 21 49 -0.27 - 94 0 0 27 11 31 3 53 4.5 14 245 -60 26 42 46 27 40 20 26 40 18 27 42 47 -0.27 - 93 0 0 27 32 15 3 53 5.4 13 245 -60 27 3 32 28 1 1 27 1 5 28 3 29 -0.27 - 92 0 0 27 52 41 3 53 6.3 12 246 -61 27 24 1 28 21 26 27 21 35 28 23 53 -0.27 - 91 0 0 28 12 51 3 53 7.1 11 246 -62 27 44 13 28 41 32 27 41 47 28 44 0 -0.27 - 90 0 0 28 32 42 3 53 7.8 10 247 -63 28 4 7 29 1 22 28 1 41 29 3 48 -0.27 - 89 0 0 28 52 16 3 53 8.5 9 247 -64 28 23 44 29 20 53 28 21 18 29 23 19 -0.27 - 88 0 0 29 11 32 3 53 9.1 8 248 -65 28 43 2 29 40 6 28 40 36 29 42 32 -0.27 - 87 0 0 29 30 29 3 53 9.6 7 248 -65 29 2 2 29 59 0 28 59 36 30 1 27 -0.27 - 86 0 0 29 49 8 3 53 10.1 6 249 -66 29 20 43 30 17 36 29 18 18 30 20 2 -0.27 - 85 0 0 30 7 28 3 53 10.5 5 249 -67 29 39 6 30 35 54 29 36 40 30 38 19 -0.27 - 84 0 0 30 25 29 3 53 10.8 5 250 -68 29 57 9 30 53 52 29 54 44 30 56 17 -0.27 - 83 0 0 30 43 10 3 53 11.1 4 250 -68 30 14 54 31 11 31 30 12 29 31 13 56 -0.27 - 82 0 0 31 0 33 3 53 11.3 3 251 -69 30 32 19 31 28 51 30 29 55 31 31 16 -0.27 - 81 0 0 31 17 37 3 53 11.5 2 251 -70 30 49 25 31 45 52 30 47 1 31 48 17 -0.27 - 80 0 0 31 34 20 3 53 11.6 1 252 -70 31 6 12 32 2 33 31 3 48 32 4 58 -0.28 - 79 0 0 31 50 45 3 53 11.6 0 252 -71 31 22 39 .. .. .. 31 20 15 .. .. .. -0.55 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 376-176867 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 51 50.9744 DE: -14 59 53.178 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 51 50.9743 DE: -14 59 53.179 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 12.0 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (335) Roberta asteroid class: approx. diameter [km]: 96 approx. diameter ["]: 0.059 distance from Earth [AU]: 2.23040 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#74 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): 0.014", 0.002", 75.502° remarks: * orbital elements for (335)Roberta : Mean anomaly = 46.0718623637 deg Arg. of pericenter = 139.7804490445 deg Long. of node = 148.4149575517 deg Inclination = 5.1025057638 deg Eccentricity = 0.1718924366 Semimajor axis = 2.4753300175 AU Perihelion dist = 2.0498395094 AU Mag: H = 9.09, G = 0.15 Epoch of elements : MJD 60644.15930625 TDT (2024 Nov 30.1593) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#742023Apr24,3.54,2024,11,30,3.823354,-0.079717,0.251525,14.531601,4.611698,0.005226,0.001837,0.000000,0.000000 -158.5658,-14.8824,119.83,-21.71,False UCAC4 376-176867,21.86415960,-14.9981048,12.28,11.99,11.83,0.0,0,,21.88665544,-14.8824218,1.95,1.71,0,0,0 335,Roberta,13.74,95.632,2.2304,0,0,3.953,18.19,,4.8,0 0,46.0315,2024,11,30,139.7804,148.4150,5.1025,0.17189,2.47533,2.04984,9.09,5.0,0.15 1.043,0.0140,0.0024,76,0.0025,Known errors,1.07,0,-1,-1 20241130_176867,60140.72 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org