IOTA/IOTA-ES occultation update for (3776) Vartiovuori / UCAC4 348-077943 event on 2024 Jan 22, 03:55 UT Visible from Summary ------- On 2024 Jan 22 UT, the 24.8876823466736 km diameter asteroid (3776) Vartiovuori will occult a 11.3 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.57 mag to 16.82 mag (the magnitude of the asteroid) for at most 0.840 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: 96 * date and approx. time of event: 2024 Jan 22, 03:51 - 2024 Jan 22, 03:58 * geocentric midpoint of event [JD]: 2460331.66331546 * magnitude of target star: 11.26 * magnitude drop [mag]: 5.57 * estimated maximum duration [s]: 0.840 * Moon: 87 % sunlit, 159° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.43 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.002", 131°) * approx speed of asteroid's shadow [km/s]: 30.0318 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 348-077943 by 3776 Vartiovuori on 2024 Jan 22 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 - 4 0 0 51 31 34 3 52 2.7 1 125 -39 51 22 17 51 40 52 51 14 21 51 48 50 .... - 3 0 0 51 5 19 3 52 2.8 1 126 -39 50 55 59 51 14 40 50 48 2 51 22 41 -0.22 - 2 0 0 50 38 27 3 52 2.8 2 126 -38 50 29 5 50 47 51 50 21 5 50 55 53 -0.33 - 1 0 0 50 10 57 3 52 3.0 3 127 -38 50 1 32 50 20 23 49 53 30 50 28 28 -0.38 0 0 0 49 42 49 3 52 3.2 4 128 -37 49 33 21 49 52 17 49 25 17 50 0 24 -0.41 1 0 0 49 14 2 3 52 3.4 4 129 -37 49 4 32 49 23 33 48 56 25 49 31 42 -0.43 2 0 0 48 44 37 3 52 3.7 5 129 -36 48 35 4 48 54 10 48 26 55 49 2 21 -0.44 3 0 0 48 14 33 3 52 4.0 6 130 -36 48 4 57 48 24 9 47 56 47 48 32 22 -0.45 4 0 0 47 43 50 3 52 4.4 7 131 -35 47 34 12 47 53 28 47 26 0 48 1 44 -0.46 5 0 0 47 12 28 3 52 4.9 8 132 -34 47 2 49 47 22 9 46 54 34 47 30 26 -0.46 6 0 0 46 40 28 3 52 5.4 9 132 -34 46 30 46 46 50 11 46 22 29 46 58 30 -0.47 7 0 0 46 7 49 3 52 5.9 10 133 -33 45 58 5 46 17 34 45 49 46 46 25 55 -0.47 8 0 0 45 34 32 3 52 6.6 10 134 -33 45 24 45 45 44 19 45 16 25 45 52 42 -0.48 9 0 0 45 0 36 3 52 7.3 11 135 -32 44 50 48 45 10 26 44 42 26 45 18 50 -0.48 10 0 0 44 26 2 3 52 8.1 12 135 -31 44 16 12 44 35 54 44 7 49 44 44 20 -0.48 11 0 0 43 50 51 3 52 8.9 13 136 -31 43 40 59 44 0 44 43 32 34 44 9 12 -0.48 12 0 0 43 15 2 3 52 9.8 14 137 -30 43 5 8 43 24 57 42 56 42 43 33 27 -0.49 13 0 0 42 38 37 3 52 10.8 15 138 -29 42 28 41 42 48 33 42 20 13 42 57 4 -0.49 14 0 0 42 1 35 3 52 11.9 16 138 -28 41 51 38 42 11 33 41 43 9 42 20 6 -0.49 15 0 0 41 23 58 3 52 13.1 17 139 -28 41 14 0 41 33 58 41 5 29 41 42 31 -0.49 16 0 0 40 45 46 3 52 14.3 18 140 -27 40 35 46 40 55 47 40 27 15 41 4 22 -0.49 17 0 0 40 7 1 3 52 15.6 19 140 -26 39 56 59 40 17 3 39 48 27 40 25 38 -0.49 18 0 0 39 27 42 3 52 17.0 20 141 -25 39 17 40 39 37 45 39 9 6 39 46 22 -0.49 19 0 0 38 47 51 3 52 18.5 21 142 -24 38 37 48 38 57 55 38 29 13 39 6 33 -0.50 20 0 0 38 7 29 3 52 20.1 22 143 -23 37 57 25 38 17 34 37 48 49 38 26 12 -0.50 21 0 0 37 26 37 3 52 21.7 23 143 -22 37 16 32 37 36 43 37 7 56 37 45 22 -0.50 22 0 0 36 45 16 3 52 23.5 24 144 -22 36 35 11 36 55 23 36 26 34 37 4 2 -0.50 23 0 0 36 3 28 3 52 25.3 25 145 -21 35 53 22 36 13 35 35 44 45 36 22 15 -0.50 24 0 0 35 21 14 3 52 27.3 26 145 -20 35 11 8 35 31 22 35 2 31 35 40 2 -0.50 25 0 0 34 38 36 3 52 29.3 27 146 -19 34 28 29 34 48 43 34 19 52 34 57 24 -0.50 26 0 0 33 55 34 3 52 31.5 28 147 -18 33 45 28 34 5 42 33 36 51 34 14 22 -0.50 27 0 0 33 12 11 3 52 33.7 29 148 -17 33 2 5 33 22 19 32 53 28 33 30 59 -0.50 28 0 0 32 28 29 3 52 36.0 30 148 -16 32 18 23 32 38 36 32 9 45 32 47 16 -0.50 29 0 0 31 44 28 3 52 38.4 31 149 -15 31 34 22 31 54 35 31 25 45 32 3 15 -0.50 30 0 0 31 0 11 3 52 40.9 32 150 -14 30 50 6 31 10 18 30 41 29 31 18 57 -0.50 31 0 0 30 15 40 3 52 43.5 34 151 -13 30 5 35 30 25 46 29 56 59 30 34 25 -0.50 32 0 0 29 30 56 3 52 46.2 35 151 -12 29 20 52 29 41 1 29 12 17 29 49 39 -0.50 33 0 0 28 46 2 3 52 49.0 36 152 -11 28 35 58 28 56 6 28 27 24 29 4 43 -0.51 34 0 0 28 0 59 3 52 51.8 37 153 -10 27 50 56 28 11 2 27 42 23 28 19 38 -0.51 35 0 0 27 15 49 3 52 54.8 38 154 -9 27 5 48 27 25 51 26 57 15 27 34 27 -0.51 36 0 0 26 30 34 3 52 57.8 39 155 -7 26 20 35 26 40 35 26 12 3 26 49 10 -0.51 37 0 0 25 45 17 3 53 1.0 40 155 -6 25 35 19 25 55 17 25 26 48 26 3 50 -0.51 38 0 0 24 59 59 3 53 4.2 41 156 -5 24 50 2 25 9 57 24 41 33 25 18 29 -0.51 39 0 0 24 14 43 3 53 7.5 42 157 -4 24 4 48 24 24 39 23 56 20 24 33 10 -0.51 40 0 0 23 29 30 3 53 10.9 43 158 -3 23 19 36 23 39 24 23 11 10 23 47 54 -0.51 41 0 0 22 44 22 3 53 14.3 44 159 -2 22 34 30 22 54 15 22 26 5 23 2 42 -0.51 42 0 0 21 59 21 3 53 17.8 45 160 -1 21 49 31 22 9 12 21 41 8 22 17 38 -0.51 43 0 0 21 14 30 3 53 21.4 46 161 0 21 4 42 21 24 19 20 56 20 21 32 43 -0.51 44 0 0 20 29 50 3 53 25.1 47 162 2 20 20 4 20 39 37 20 11 44 20 47 59 -0.51 45 0 0 19 45 23 3 53 28.8 48 163 3 19 35 39 19 55 8 19 27 21 20 3 28 -0.51 46 0 0 19 1 11 3 53 32.6 49 165 4 18 51 29 19 10 53 18 43 13 19 19 12 -0.51 47 0 0 18 17 15 3 53 36.5 50 166 5 18 7 36 18 26 55 17 59 22 18 35 12 -0.51 48 0 0 17 33 38 3 53 40.4 51 167 6 17 24 1 17 43 16 17 15 49 17 51 31 -0.51 49 0 0 16 50 21 3 53 44.3 52 168 7 16 40 47 16 59 57 16 32 37 17 8 9 -0.51 50 0 0 16 7 26 3 53 48.3 53 170 9 15 57 55 16 16 59 15 49 47 16 25 10 -0.51 51 0 0 15 24 55 3 53 52.4 54 171 10 15 15 26 15 34 25 15 7 20 15 42 34 -0.52 52 0 0 14 42 48 3 53 56.4 55 173 11 14 33 22 14 52 16 14 25 18 15 0 22 -0.52 53 0 0 14 1 8 3 54 0.6 55 174 12 13 51 44 14 10 33 13 43 43 14 18 37 -0.52 54 0 0 13 19 56 3 54 4.7 56 176 13 13 10 34 13 29 19 13 2 35 13 37 20 -0.52 55 0 0 12 39 13 3 54 8.9 57 177 15 12 29 54 12 48 33 12 21 57 12 56 32 -0.52 56 0 0 11 59 0 3 54 13.1 58 179 16 11 49 44 12 8 18 11 41 49 12 16 15 -0.52 57 0 0 11 19 19 3 54 17.3 58 181 17 11 10 6 11 28 34 11 2 13 11 36 29 -0.52 58 0 0 10 40 11 3 54 21.6 59 183 18 10 31 0 10 49 23 10 23 10 10 57 15 -0.52 59 0 0 10 1 37 3 54 25.8 59 185 19 9 52 29 10 10 46 9 44 41 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 348-077943 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 43 08.0050 DE: -20 27 32.734 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 43 08.0051 DE: -20 27 32.734 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3776) Vartiovuori asteroid class: approx. diameter [km]: 25 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.29970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.020", 0.002", 131.196° remarks: * orbital elements for (3776)Vartiovuori : Mean anomaly = 19.8218230836 deg Arg. of pericenter = 159.0660803485 deg Long. of node = 39.5831502035 deg Inclination = 27.3868556511 deg Eccentricity = 0.0673415907 Semimajor axis = 3.1858278413 AU Perihelion dist = 2.9712891268 AU Mag: H = 10.95, G = 0.15 Epoch of elements : MJD 60331.16331554 TDT (2024 Jan 22.1633) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,0.84,2024,1,22,3.919571,0.226215,0.404788,14.803824,-8.256892,-0.005211,0.001148,-0.000001,0.000000 56.3239,-20.5350,124.05,-19.80,False UCAC4 348-077943,15.71889025,-20.4590927,11.93,11.26,10.90,0.1,0,,15.74190364,-20.5350345,5.57,5.48,0,0,0 3776,Vartiovuori,16.82,25.127,3.2997,0,0,2.810,-22.01,,1.4,0 0,19.7935,2024,1,22,159.0661,39.5832,27.3869,0.06734,3.18583,2.97129,10.95,5.0,0.15 1.427,0.0200,0.0016,131,0.0045,Known errors,1.21,0,-1,-1 20240122_077943,60137.03 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org