IOTA/IOTA-ES occultation update for (1331) Solvejg / UCAC4 404-056747 event on 2024 Dec 30, 23:55 UT Visible from Summary ------- On 2024 Dec 30 UT, the 33.567 km diameter asteroid (1331) Solvejg will occult a 11.4 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.32 mag to 16.73 mag (the magnitude of the asteroid) for at most 1.220 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 Dec 30, 23:52 - 2024 Dec 30, 23:59 * geocentric midpoint of event [JD]: 2460675.49689721 * magnitude of target star: 11.42 * magnitude drop [mag]: 5.32 * estimated maximum duration [s]: 1.220 * Moon: 0 % sunlit, 69° distance * Sun: 68° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.004", 104°) * approx speed of asteroid's shadow [km/s]: 27.4322 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 404-056747 by 1331 Solvejg on 2024 Dec 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 21 0 0 -11 15 41 23 52 7.8 1 99 -51 -11 26 13 -11 5 9 -11 33 6 -10 58 19 .... 22 0 0 -11 26 2 23 52 7.9 2 99 -51 -11 36 35 -11 15 30 -11 43 28 -11 8 39 0.42 23 0 0 -11 36 46 23 52 8.1 3 99 -50 -11 47 20 -11 26 13 -11 54 13 -11 19 22 0.47 24 0 0 -11 47 51 23 52 8.3 4 99 -49 -11 58 25 -11 37 17 -12 5 19 -11 30 25 0.49 25 0 0 -11 59 17 23 52 8.6 5 99 -49 -12 9 53 -11 48 43 -12 16 47 -11 41 51 0.50 26 0 0 -12 11 5 23 52 9.0 6 98 -48 -12 21 42 -12 0 30 -12 28 36 -11 53 37 0.51 27 0 0 -12 23 14 23 52 9.5 7 98 -47 -12 33 51 -12 12 39 -12 40 47 -12 5 45 0.52 28 0 0 -12 35 45 23 52 10.1 8 98 -47 -12 46 22 -12 25 8 -12 53 18 -12 18 14 0.52 29 0 0 -12 48 35 23 52 10.7 9 98 -46 -12 59 14 -12 37 58 -13 6 10 -12 31 3 0.53 30 0 0 -13 1 47 23 52 11.5 10 98 -45 -13 12 26 -12 51 8 -13 19 23 -12 44 13 0.53 31 0 0 -13 15 18 23 52 12.3 11 97 -44 -13 25 59 -13 4 39 -13 32 56 -12 57 44 0.53 32 0 0 -13 29 10 23 52 13.2 12 97 -44 -13 39 51 -13 18 30 -13 46 49 -13 11 34 0.53 33 0 0 -13 43 22 23 52 14.1 13 97 -43 -13 54 4 -13 32 41 -14 1 2 -13 25 44 0.53 34 0 0 -13 57 53 23 52 15.2 14 96 -42 -14 8 36 -13 47 11 -14 15 35 -13 40 14 0.53 35 0 0 -14 12 44 23 52 16.3 14 96 -41 -14 23 27 -14 2 1 -14 30 27 -13 55 3 0.54 36 0 0 -14 27 53 23 52 17.5 15 96 -40 -14 38 38 -14 17 10 -14 45 38 -14 10 11 0.54 37 0 0 -14 43 21 23 52 18.8 16 96 -39 -14 54 7 -14 32 37 -15 1 8 -14 25 38 0.54 38 0 0 -14 59 8 23 52 20.1 17 95 -39 -15 9 55 -14 48 23 -15 16 56 -14 41 23 0.54 39 0 0 -15 15 13 23 52 21.6 18 95 -38 -15 26 1 -15 4 27 -15 33 3 -14 57 27 0.54 40 0 0 -15 31 36 23 52 23.1 19 95 -37 -15 42 25 -15 20 49 -15 49 27 -15 13 48 0.54 41 0 0 -15 48 17 23 52 24.7 20 94 -36 -15 59 6 -15 37 28 -16 6 9 -15 30 27 0.54 42 0 0 -16 5 14 23 52 26.4 21 94 -35 -16 16 4 -15 54 25 -16 23 8 -15 47 23 0.54 43 0 0 -16 22 28 23 52 28.1 22 94 -34 -16 33 20 -16 11 38 -16 40 24 -16 4 36 0.54 44 0 0 -16 39 59 23 52 29.9 23 93 -33 -16 50 51 -16 29 8 -16 57 56 -16 22 5 0.54 45 0 0 -16 57 46 23 52 31.8 24 93 -32 -17 8 39 -16 46 54 -17 15 45 -16 39 51 0.54 46 0 0 -17 15 49 23 52 33.8 25 92 -32 -17 26 43 -17 4 56 -17 33 49 -16 57 52 0.54 47 0 0 -17 34 7 23 52 35.8 26 92 -31 -17 45 1 -17 23 13 -17 52 8 -17 16 8 0.54 48 0 0 -17 52 39 23 52 37.9 27 92 -30 -18 3 35 -17 41 45 -18 10 43 -17 34 39 0.54 49 0 0 -18 11 27 23 52 40.1 28 91 -29 -18 22 23 -18 0 31 -18 29 31 -17 53 25 0.54 50 0 0 -18 30 28 23 52 42.3 29 91 -28 -18 41 26 -18 19 32 -18 48 34 -18 12 25 0.54 51 0 0 -18 49 43 23 52 44.6 30 90 -27 -19 0 41 -18 38 46 -19 7 51 -18 31 38 0.54 52 0 0 -19 9 11 23 52 47.0 31 90 -26 -19 20 10 -18 58 13 -19 27 20 -18 51 5 0.54 53 0 0 -19 28 52 23 52 49.5 32 89 -25 -19 39 52 -19 17 53 -19 47 2 -19 10 44 0.54 54 0 0 -19 48 45 23 52 52.0 33 88 -24 -19 59 46 -19 37 45 -20 6 57 -19 30 36 0.54 55 0 0 -20 8 49 23 52 54.5 34 88 -23 -20 19 51 -19 57 49 -20 27 3 -19 50 39 0.54 56 0 0 -20 29 5 23 52 57.2 35 87 -22 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58 1.2 37 301 58 -47 44 41 -47 23 53 -47 51 28 -47 17 8 0.55 156 0 0 -47 39 3 23 58 3.1 36 300 58 -47 49 27 -47 28 40 -47 56 13 -47 21 54 0.55 157 0 0 -47 43 32 23 58 4.9 35 299 59 -47 53 56 -47 33 10 -48 0 42 -47 26 25 0.55 158 0 0 -47 47 45 23 58 6.7 35 298 59 -47 58 8 -47 37 23 -48 4 55 -47 30 39 0.55 159 0 0 -47 51 42 23 58 8.5 34 297 60 -48 2 5 -47 41 20 -48 8 51 -47 34 36 0.55 160 0 0 -47 55 22 23 58 10.3 34 296 60 -48 5 45 -47 45 1 -48 12 30 -47 38 17 0.55 161 0 0 -47 58 46 23 58 12.0 33 295 60 -48 9 8 -47 48 25 -48 15 54 -47 41 41 0.55 162 0 0 -48 1 54 23 58 13.7 32 294 61 -48 12 15 -47 51 33 -48 19 1 -47 44 49 0.55 163 0 0 -48 4 45 23 58 15.3 32 293 61 -48 15 6 -47 54 24 -48 21 51 -47 47 41 0.55 164 0 0 -48 7 20 23 58 17.0 31 293 61 -48 17 41 -47 57 0 -48 24 26 -47 50 16 0.55 165 0 0 -48 9 38 23 58 18.6 30 292 62 -48 19 59 -47 59 18 -48 26 44 -47 52 35 0.55 166 0 0 -48 11 41 23 58 20.1 30 291 62 -48 22 1 -48 1 21 -48 28 46 -47 54 38 0.55 167 0 0 -48 13 27 23 58 21.7 29 290 62 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30 40 -47 56 32 0.55 180 0 0 -48 11 50 23 58 38.7 21 279 65 -48 22 11 -48 1 30 -48 28 56 -47 54 47 0.55 -179 0 0 -48 9 49 23 58 39.7 20 278 65 -48 20 11 -47 59 29 -48 26 56 -47 52 46 0.55 -178 0 0 -48 7 32 23 58 40.8 19 278 65 -48 17 54 -47 57 12 -48 24 39 -47 50 28 0.55 -177 0 0 -48 4 59 23 58 41.8 19 277 65 -48 15 21 -47 54 38 -48 22 7 -47 47 55 0.56 -176 0 0 -48 2 10 23 58 42.8 18 276 65 -48 12 32 -47 51 49 -48 19 18 -47 45 5 0.56 -175 0 0 -47 59 5 23 58 43.7 17 275 65 -48 9 27 -47 48 43 -48 16 13 -47 41 59 0.56 -174 0 0 -47 55 43 23 58 44.7 17 274 65 -48 6 6 -47 45 21 -48 12 52 -47 38 37 0.56 -173 0 0 -47 52 5 23 58 45.6 16 274 65 -48 2 28 -47 41 43 -48 9 15 -47 34 58 0.56 -172 0 0 -47 48 11 23 58 46.4 15 273 65 -47 58 35 -47 37 48 -48 5 21 -47 31 4 0.56 -171 0 0 -47 44 1 23 58 47.2 15 272 65 -47 54 25 -47 33 38 -48 1 12 -47 26 52 0.56 -170 0 0 -47 39 34 23 58 48.0 14 271 64 -47 49 59 -47 29 10 -47 56 46 -47 22 25 0.56 -169 0 0 -47 34 51 23 58 48.8 13 271 64 -47 45 16 -47 24 27 -47 52 4 -47 17 41 0.56 -168 0 0 -47 29 52 23 58 49.5 13 270 64 -47 40 18 -47 19 28 -47 47 6 -47 12 41 0.56 -167 0 0 -47 24 37 23 58 50.1 12 269 64 -47 35 3 -47 14 12 -47 41 51 -47 7 25 0.57 -166 0 0 -47 19 5 23 58 50.8 11 268 64 -47 29 32 -47 8 39 -47 36 20 -47 1 53 0.57 -165 0 0 -47 13 17 23 58 51.4 11 268 63 -47 23 44 -47 2 51 -47 30 33 -46 56 4 0.57 -164 0 0 -47 7 13 23 58 52.0 10 267 63 -47 17 41 -46 56 46 -47 24 30 -46 49 58 0.57 -163 0 0 -47 0 52 23 58 52.5 9 266 63 -47 11 21 -46 50 24 -47 18 10 -46 43 36 0.57 -162 0 0 -46 54 15 23 58 53.0 9 265 63 -47 4 44 -46 43 47 -47 11 34 -46 36 58 0.58 -161 0 0 -46 47 22 23 58 53.5 8 265 62 -46 57 52 -46 36 53 -47 4 42 -46 30 4 0.58 -160 0 0 -46 40 12 23 58 53.9 7 264 62 -46 50 43 -46 29 42 -46 57 34 -46 22 53 0.58 -159 0 0 -46 32 46 23 58 54.3 6 263 62 -46 43 17 -46 22 15 -46 50 9 -46 15 26 0.59 -158 0 0 -46 25 3 23 58 54.6 6 263 61 -46 35 35 -46 14 32 -46 42 27 -46 7 42 0.59 -157 0 0 -46 17 4 23 58 54.9 5 262 61 -46 27 37 -46 6 33 -46 34 30 -45 59 42 0.60 -156 0 0 -46 8 49 23 58 55.2 4 261 60 -46 19 23 -45 58 17 -46 26 16 -45 51 25 0.61 -155 0 0 -46 0 17 23 58 55.5 4 260 60 -46 10 52 -45 49 44 -46 17 45 -45 42 52 0.62 -154 0 0 -45 51 29 23 58 55.6 3 260 59 -46 2 5 -45 40 55 -46 8 59 -45 34 3 0.64 -153 0 0 -45 42 25 23 58 55.8 2 259 59 -45 53 1 -45 31 50 -45 59 56 -45 24 57 0.67 -152 0 0 -45 33 4 23 58 55.9 2 258 59 -45 43 41 -45 22 28 -45 50 36 -45 15 35 0.73 -151 0 0 -45 23 27 23 58 56.0 1 257 58 -45 34 5 -45 12 50 -45 41 0 -45 5 57 0.90 -150 0 0 -45 13 33 23 58 56.0 0 257 58 -45 24 12 -45 2 56 -45 31 8 -44 56 2 3.97 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 404-056747 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 59 42.5117 DE: -09 15 07.281 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 59 42.5120 DE: -09 15 07.282 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.4 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1331) Solvejg asteroid class: approx. diameter [km]: 34 approx. diameter ["]: 0.013 distance from Earth [AU]: 3.43730 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): 0.013", 0.004", 104.154° remarks: * orbital elements for (1331)Solvejg : Mean anomaly = 270.0623199012 deg Arg. of pericenter = 184.3802567095 deg Long. of node = 121.3201042148 deg Inclination = 3.1009873635 deg Eccentricity = 0.1895161448 Semimajor axis = 3.0998873335 AU Perihelion dist = 2.5124086368 AU Mag: H = 10.63, G = 0.15 Epoch of elements : MJD 60674.99689724 TDT (2024 Dec 30.9969) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#572023Apr24,1.22,2024,12,30,23.925533,-0.142252,-0.455373,14.787196,-4.591094,-0.005272,0.002050,-0.000001,0.000000 111.4626,-9.3731,-178.14,-23.08,False UCAC4 404-056747,13.99514212,-9.2520222,11.73,11.42,11.25,0.0,0,K,14.01709461,-9.3731251,5.32,5.04,0,0,0 1331,Solvejg,16.73,33.567,3.4373,0,0,2.557,-11.75,,2.4,0 0,269.8823,2024,12,30,184.3803,121.3201,3.1010,0.18952,3.09989,2.51241,10.63,5.0,0.15 1.325,0.0133,0.0043,104,0.0044,Known errors,1.12,0,-1,-1 20241230_056747,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org