IOTA/IOTA-ES occultation update for (2627) Churyumov / UCAC4 564-037640 event on 2024 Jan 26, 17:13 UT Visible from Summary ------- On 2024 Jan 26 UT, the 20.744 km diameter asteroid (2627) Churyumov will occult a 12.0 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.27 mag to 16.23 mag (the magnitude of the asteroid) for at most 2.160 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: 98 * date and approx. time of event: 2024 Jan 26, 17:02 - 2024 Jan 26, 17:24 * geocentric midpoint of event [JD]: 2460336.21798525 * magnitude of target star: 11.98 * magnitude drop [mag]: 4.27 * estimated maximum duration [s]: 2.160 * Moon: 99 % sunlit, 31° distance * Sun: 161° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.035, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.035", 0.003", 95°) * approx speed of asteroid's shadow [km/s]: 9.6001 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 564-037640 by 2627 Churyumov on 2024 Jan 26 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 - 17 0 0 23 33 29 17 24 41.0 1 66 17 23 39 48 23 27 10 23 44 7 23 22 51 .... - 16 0 0 23 58 34 17 24 40.7 2 66 16 24 4 52 23 52 16 24 9 11 23 47 57 -0.23 - 15 0 0 24 23 21 17 24 40.2 3 66 15 24 29 39 24 17 3 24 33 57 24 12 45 -0.22 - 14 0 0 24 47 49 17 24 39.5 4 67 14 24 54 6 24 41 32 24 58 25 24 37 14 -0.22 - 13 0 0 25 11 59 17 24 38.5 5 67 13 25 18 15 25 5 42 25 22 33 25 1 25 -0.22 - 12 0 0 25 35 49 17 24 37.4 6 68 12 25 42 5 25 29 33 25 46 22 25 25 16 -0.22 - 11 0 0 25 59 20 17 24 36.1 7 68 11 26 5 35 25 53 4 26 9 52 25 48 48 -0.22 - 10 0 0 26 22 31 17 24 34.6 8 69 10 26 28 46 26 16 16 26 33 2 26 12 0 -0.22 - 9 0 0 26 45 22 17 24 33.0 9 69 9 26 51 36 26 39 8 26 55 52 26 34 52 -0.22 - 8 0 0 27 7 52 17 24 31.1 10 70 8 27 14 6 27 1 39 27 18 22 26 57 24 -0.22 - 7 0 0 27 30 3 17 24 29.1 11 70 7 27 36 15 27 23 50 27 40 31 27 19 35 -0.22 - 6 0 0 27 51 52 17 24 26.9 12 70 6 27 58 4 27 45 40 28 2 19 27 41 25 -0.22 - 5 0 0 28 13 20 17 24 24.5 13 71 5 28 19 32 28 7 9 28 23 46 28 2 55 -0.22 - 4 0 0 28 34 28 17 24 22.0 14 71 4 28 40 38 28 28 17 28 44 52 28 24 3 -0.22 - 3 0 0 28 55 14 17 24 19.3 14 72 3 29 1 24 28 49 4 29 5 37 28 44 51 -0.22 - 2 0 0 29 15 38 17 24 16.4 15 72 3 29 21 48 29 9 29 29 26 1 29 5 16 -0.22 - 1 0 0 29 35 41 17 24 13.4 16 73 2 29 41 50 29 29 33 29 46 3 29 25 21 -0.22 - 0 0 0 29 55 23 17 24 10.3 17 73 1 30 1 31 29 49 15 30 5 43 29 45 3 -0.22 1 0 0 30 14 42 17 24 7.0 18 74 0 30 20 50 30 8 35 30 25 1 30 4 24 -0.22 2 0 0 30 33 40 17 24 3.5 19 74 -1 30 39 47 30 27 33 30 43 58 30 23 23 -0.22 3 0 0 30 52 16 17 23 59.9 20 75 -2 30 58 22 30 46 10 31 2 32 30 41 59 -0.22 4 0 0 31 10 29 17 23 56.2 21 75 -3 31 16 35 31 4 24 31 20 45 31 0 14 -0.22 5 0 0 31 28 21 17 23 52.3 22 76 -4 31 34 26 31 22 16 31 38 35 31 18 7 -0.22 6 0 0 31 45 50 17 23 48.3 23 77 -5 31 51 54 31 39 46 31 56 3 31 35 37 -0.22 7 0 0 32 2 57 17 23 44.2 23 77 -6 32 9 1 31 56 54 32 13 10 31 52 46 -0.22 8 0 0 32 19 42 17 23 40.0 24 78 -6 32 25 45 32 13 40 32 29 53 32 9 32 -0.22 9 0 0 32 36 5 17 23 35.6 25 78 -7 32 42 7 32 30 3 32 46 15 32 25 56 -0.22 10 0 0 32 52 6 17 23 31.1 26 79 -8 32 58 7 32 46 4 33 2 14 32 41 57 -0.22 11 0 0 33 7 44 17 23 26.5 27 79 -9 33 13 45 33 1 43 33 17 52 32 57 37 -0.22 12 0 0 33 23 0 17 23 21.8 28 80 -10 33 29 0 33 17 0 33 33 7 33 12 54 -0.22 13 0 0 33 37 54 17 23 17.0 29 81 -11 33 43 53 33 31 54 33 47 59 33 27 49 -0.22 14 0 0 33 52 25 17 23 12.1 29 81 -12 33 58 24 33 46 27 34 2 30 33 42 21 -0.22 15 0 0 34 6 35 17 23 7.0 30 82 -12 34 12 33 34 0 37 34 16 38 33 56 32 -0.22 16 0 0 34 20 22 17 23 1.9 31 82 -13 34 26 20 34 14 24 34 30 25 34 10 20 -0.22 17 0 0 34 33 47 17 22 56.7 32 83 -14 34 39 44 34 27 50 34 43 49 34 23 46 -0.22 18 0 0 34 46 50 17 22 51.4 33 84 -15 34 52 47 34 40 54 34 56 51 34 36 50 -0.22 19 0 0 34 59 31 17 22 45.9 34 84 -16 35 5 27 34 53 35 35 9 31 34 49 32 -0.22 20 0 0 35 11 50 17 22 40.4 34 85 -17 35 17 45 35 5 55 35 21 49 35 1 52 -0.22 21 0 0 35 23 47 17 22 34.8 35 86 -17 35 29 42 35 17 52 35 33 45 35 13 50 -0.22 22 0 0 35 35 22 17 22 29.1 36 86 -18 35 41 17 35 29 28 35 45 19 35 25 26 -0.22 23 0 0 35 46 35 17 22 23.4 37 87 -19 35 52 29 35 40 42 35 56 31 35 36 40 -0.22 24 0 0 35 57 27 17 22 17.5 38 88 -20 36 3 20 35 51 33 36 7 22 35 47 32 -0.22 25 0 0 36 7 56 17 22 11.6 38 88 -21 36 13 49 36 2 4 36 17 50 35 58 2 -0.22 26 0 0 36 18 4 17 22 5.6 39 89 -21 36 23 56 36 12 12 36 27 58 36 8 11 -0.22 27 0 0 36 27 50 17 21 59.5 40 90 -22 36 33 42 36 21 59 36 37 43 36 17 58 -0.22 28 0 0 36 37 15 17 21 53.3 41 90 -23 36 43 7 36 31 24 36 47 7 36 27 24 -0.22 29 0 0 36 46 18 17 21 47.0 42 91 -24 36 52 9 36 40 28 36 56 10 36 36 28 -0.22 30 0 0 36 55 0 17 21 40.7 42 92 -25 37 0 51 36 49 10 37 4 51 36 45 10 -0.22 31 0 0 37 3 20 17 21 34.3 43 93 -25 37 9 11 36 57 30 37 13 10 36 53 31 -0.23 32 0 0 37 11 19 17 21 27.8 44 93 -26 37 17 9 37 5 30 37 21 9 37 1 31 -0.23 33 0 0 37 18 57 17 21 21.3 45 94 -27 37 24 47 37 13 8 37 28 46 37 9 9 -0.23 34 0 0 37 26 14 17 21 14.7 45 95 -28 37 32 3 37 20 25 37 36 2 37 16 26 -0.23 35 0 0 37 33 9 17 21 8.0 46 96 -29 37 38 58 37 27 20 37 42 56 37 23 22 -0.23 36 0 0 37 39 43 17 21 1.3 47 96 -29 37 45 32 37 33 55 37 49 30 37 29 57 -0.23 37 0 0 37 45 56 17 20 54.5 48 97 -30 37 51 45 37 40 9 37 55 43 37 36 11 -0.23 38 0 0 37 51 49 17 20 47.6 48 98 -31 37 57 36 37 46 1 38 1 35 37 42 3 -0.23 39 0 0 37 57 20 17 20 40.7 49 99 -32 38 3 8 37 51 33 38 7 5 37 47 35 -0.23 40 0 0 38 2 30 17 20 33.7 50 100 -32 38 8 18 37 56 43 38 12 15 37 52 46 -0.23 41 0 0 38 7 20 17 20 26.7 51 101 -33 38 13 7 38 1 33 38 17 4 37 57 36 -0.23 42 0 0 38 11 49 17 20 19.6 51 101 -34 38 17 36 38 6 2 38 21 33 38 2 5 -0.23 43 0 0 38 15 57 17 20 12.4 52 102 -35 38 21 43 38 10 10 38 25 41 38 6 13 -0.23 44 0 0 38 19 44 17 20 5.2 53 103 -35 38 25 30 38 13 58 38 29 28 38 10 1 -0.23 45 0 0 38 23 11 17 19 57.9 54 104 -36 38 28 57 38 17 25 38 32 54 38 13 28 -0.23 46 0 0 38 26 17 17 19 50.5 54 105 -37 38 32 3 38 20 31 38 36 0 38 16 34 -0.23 47 0 0 38 29 2 17 19 43.1 55 106 -38 38 34 48 38 23 16 38 38 45 38 19 20 -0.23 48 0 0 38 31 27 17 19 35.7 56 107 -38 38 37 13 38 25 42 38 41 10 38 21 45 -0.23 49 0 0 38 33 32 17 19 28.2 56 108 -39 38 39 17 38 27 46 38 43 14 38 23 50 -0.23 50 0 0 38 35 16 17 19 20.6 57 109 -40 38 41 1 38 29 30 38 44 58 38 25 34 -0.23 51 0 0 38 36 39 17 19 13.0 58 110 -41 38 42 25 38 30 54 38 46 21 38 26 57 -0.23 52 0 0 38 37 42 17 19 5.3 59 111 -41 38 43 28 38 31 57 38 47 24 38 28 1 -0.23 53 0 0 38 38 25 17 18 57.6 59 112 -42 38 44 10 38 32 39 38 48 7 38 28 43 -0.23 54 0 0 38 38 47 17 18 49.8 60 113 -43 38 44 33 38 33 2 38 48 29 38 29 5 -0.23 55 0 0 38 38 49 17 18 42.0 61 114 -44 38 44 34 38 33 4 38 48 31 38 29 7 -0.23 56 0 0 38 38 30 17 18 34.1 61 116 -44 38 44 16 38 32 45 38 48 12 38 28 49 -0.23 57 0 0 38 37 52 17 18 26.2 62 117 -45 38 43 37 38 32 6 38 47 34 38 28 10 -0.23 58 0 0 38 36 52 17 18 18.2 63 118 -46 38 42 38 38 31 7 38 46 35 38 27 10 -0.23 59 0 0 38 35 33 17 18 10.2 63 119 -47 38 41 19 38 29 47 38 45 15 38 25 51 -0.23 60 0 0 38 33 53 17 18 2.1 64 121 -47 38 39 39 38 28 7 38 43 35 38 24 11 -0.23 61 0 0 38 31 53 17 17 54.0 65 122 -48 38 37 39 38 26 7 38 41 35 38 22 10 -0.23 62 0 0 38 29 32 17 17 45.8 65 123 -49 38 35 18 38 23 46 38 39 15 38 19 50 -0.23 63 0 0 38 26 51 17 17 37.6 66 125 -50 38 32 38 38 21 5 38 36 34 38 17 9 -0.23 64 0 0 38 23 50 17 17 29.3 67 126 -50 38 29 36 38 18 4 38 33 34 38 14 7 -0.23 65 0 0 38 20 28 17 17 21.0 67 128 -51 38 26 15 38 14 42 38 30 12 38 10 45 -0.23 66 0 0 38 16 47 17 17 12.6 68 130 -52 38 22 33 38 11 0 38 26 31 38 7 3 -0.23 67 0 0 38 12 44 17 17 4.2 68 131 -53 38 18 31 38 6 57 38 22 29 38 3 0 -0.23 68 0 0 38 8 22 17 16 55.7 69 133 -53 38 14 9 38 2 34 38 18 6 37 58 37 -0.23 69 0 0 38 3 38 17 16 47.2 70 135 -54 38 9 26 37 57 51 38 13 24 37 53 54 -0.23 70 0 0 37 58 35 17 16 38.6 70 137 -55 38 4 23 37 52 47 38 8 21 37 48 50 -0.23 71 0 0 37 53 11 17 16 30.0 71 139 -55 37 58 59 37 47 23 38 2 57 37 43 25 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18 291 -37 8 31 10 8 18 28 8 35 31 8 14 7 -0.22 162 0 0 7 56 49 17 3 37.7 17 291 -36 8 3 10 7 50 28 8 7 31 7 46 8 -0.23 163 0 0 7 28 54 17 3 33.9 16 291 -35 7 35 15 7 22 33 7 39 35 7 18 13 -0.23 164 0 0 7 1 4 17 3 30.5 15 292 -34 7 7 25 6 54 44 7 11 45 6 50 24 -0.23 165 0 0 6 33 22 17 3 27.2 14 292 -33 6 39 42 6 27 2 6 44 2 6 22 42 -0.23 166 0 0 6 5 46 17 3 24.2 13 292 -32 6 12 5 5 59 26 6 16 25 5 55 7 -0.23 167 0 0 5 38 18 17 3 21.4 12 292 -30 5 44 37 5 31 59 5 48 57 5 27 40 -0.23 168 0 0 5 10 59 17 3 18.8 11 292 -29 5 17 18 5 4 40 5 21 37 5 0 21 -0.23 169 0 0 4 43 49 17 3 16.5 10 292 -28 4 50 7 4 37 31 4 54 26 4 33 12 -0.24 170 0 0 4 16 49 17 3 14.4 9 292 -27 4 23 7 4 10 31 4 27 26 4 6 13 -0.24 171 0 0 3 50 0 17 3 12.6 8 292 -26 3 56 17 3 43 42 4 0 36 3 39 24 -0.24 172 0 0 3 23 22 17 3 11.0 7 292 -25 3 29 39 3 17 5 3 33 57 3 12 47 -0.25 173 0 0 2 56 56 17 3 9.6 5 292 -24 3 3 13 2 50 39 3 7 30 2 46 22 -0.26 174 0 0 2 30 43 17 3 8.5 4 292 -23 2 36 59 2 24 27 2 41 16 2 20 10 -0.27 175 0 0 2 4 43 17 3 7.6 3 293 -22 2 10 58 1 58 27 2 15 15 1 54 11 -0.29 176 0 0 1 38 57 17 3 7.0 2 293 -21 1 45 12 1 32 42 1 49 29 1 28 26 -0.33 177 0 0 1 13 26 17 3 6.6 1 293 -20 1 19 40 1 7 11 1 23 56 1 2 55 -0.44 178 0 0 .. .. .... .. .. .. .. .. .. 0 54 23 0 41 56 0 58 39 .. .. .. .... Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 564-037640 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 14 28.9731 DE: +22 37 41.891 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 14 28.9731 DE: +22 37 41.891 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 12.0 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2627) Churyumov asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.016 distance from Earth [AU]: 1.77210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 27 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): 0.035", 0.003", 94.709° remarks: * orbital elements for (2627)Churyumov : Mean anomaly = 36.8400111468 deg Arg. of pericenter = 313.3660383815 deg Long. of node = 109.5032994291 deg Inclination = 2.4983462966 deg Eccentricity = 0.1721573805 Semimajor axis = 3.1102393386 AU Perihelion dist = 2.5747886813 AU Mag: H = 12.30, G = 0.15 Epoch of elements : MJD 60335.71798609 TDT (2024 Jan 26.7180) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr27,2.16,2024,1,26,17.231646,0.047085,0.219302,-5.297864,1.137406,0.001869,-0.000275,0.000001,0.000000 85.0118,22.5868,-75.36,-18.71,False UCAC4 564-037640,7.24138143,22.6283031,12.59,11.98,11.65,0.0,0,,7.26579516,22.5867786,4.27,4.15,0,0,0 2627,Churyumov,16.23,20.744,1.7721,0,0,-1.897,5.64,,1.2,0 0,36.7110,2024,1,26,313.3660,109.5033,2.4983,0.17216,3.11024,2.57479,12.31,5.0,0.15 1.342,0.0350,0.0032,95,0.0055,Known errors,2.05,0,-1,-1 20240126_037640,60137.03 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org