IOTA/IOTA-ES occultation update for (202) Chryseis / UCAC4 387-081472 event on 2023 May 04, 16:21 UT Visible from New Zealand, Australia Summary ------- On 2023 May 04 UT, the 88.3 km diameter asteroid (202) Chryseis will occult a 12.4 mag star in the constellation Serpens for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.92 mag to 12.73 mag (the magnitude of the asteroid) for at most 13.400 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: 2023 May 04, 16:07 - 2023 May 04, 16:36 * geocentric midpoint of event [JD]: 2460069.18186338 * magnitude of target star: 12.42 * magnitude drop [mag]: 0.92 * estimated maximum duration [s]: 13.400 * Moon: 99 % sunlit, 54° distance * Sun: 137° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 99 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 6.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.002", 98°) * approx speed of asteroid's shadow [km/s]: 6.5876 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 387-081472 by 202 Chryseis on 2023 May 4 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 63 0 0 - 8 30 15 16 36 15.6 1 103 -43 - 8 2 55 - 8 57 42 - 7 57 40 - 9 2 59 .... 64 0 0 - 8 44 19 16 36 15.2 2 103 -44 - 8 16 57 - 9 11 48 - 8 11 42 - 9 17 5 0.41 65 0 0 - 8 58 45 16 36 14.4 3 102 -45 - 8 31 21 - 9 26 16 - 8 26 5 - 9 31 34 0.44 66 0 0 - 9 13 33 16 36 13.2 4 102 -46 - 8 46 7 - 9 41 6 - 8 40 51 - 9 46 25 0.45 67 0 0 - 9 28 43 16 36 11.7 5 102 -47 - 9 1 14 - 9 56 18 - 8 55 58 -10 1 37 0.46 68 0 0 - 9 44 14 16 36 9.9 6 102 -48 - 9 16 43 -10 11 51 - 9 11 26 -10 17 10 0.46 69 0 0 -10 0 5 16 36 7.8 7 102 -49 - 9 32 32 -10 27 45 - 9 27 15 -10 33 5 0.47 70 0 0 -10 16 18 16 36 5.3 8 101 -50 - 9 48 42 -10 44 0 - 9 43 25 -10 49 20 0.47 71 0 0 -10 32 50 16 36 2.5 9 101 -52 -10 5 12 -11 0 35 - 9 59 55 -11 5 55 0.47 72 0 0 -10 49 42 16 35 59.3 10 101 -53 -10 22 2 -11 17 29 -10 16 44 -11 22 50 0.47 73 0 0 -11 6 54 16 35 55.9 11 101 -54 -10 39 12 -11 34 43 -10 33 53 -11 40 5 0.47 74 0 0 -11 24 25 16 35 52.1 12 101 -55 -10 56 40 -11 52 16 -10 51 21 -11 57 38 0.48 75 0 0 -11 42 14 16 35 47.9 13 100 -56 -11 14 27 -12 10 8 -11 9 8 -12 15 30 0.48 76 0 0 -12 0 22 16 35 43.5 14 100 -57 -11 32 32 -12 28 18 -11 27 12 -12 33 41 0.48 77 0 0 -12 18 47 16 35 38.7 15 100 -58 -11 50 55 -12 46 46 -11 45 35 -12 52 9 0.48 78 0 0 -12 37 30 16 35 33.6 16 100 -59 -12 9 36 -13 5 31 -12 4 15 -13 10 55 0.48 79 0 0 -12 56 30 16 35 28.2 17 99 -60 -12 28 33 -13 24 33 -12 23 12 -13 29 57 0.48 80 0 0 -13 15 46 16 35 22.5 18 99 -60 -12 47 47 -13 43 52 -12 42 25 -13 49 17 0.48 81 0 0 -13 35 18 16 35 16.5 19 99 -61 -13 7 17 -14 3 27 -13 1 55 -14 8 52 0.48 82 0 0 -13 55 6 16 35 10.2 20 99 -62 -13 27 2 -14 23 17 -13 21 40 -14 28 43 0.48 83 0 0 -14 15 9 16 35 3.6 21 98 -63 -13 47 3 -14 43 23 -13 41 40 -14 48 49 0.48 84 0 0 -14 35 28 16 34 56.7 22 98 -64 -14 7 19 -15 3 43 -14 1 55 -15 9 10 0.48 85 0 0 -14 56 0 16 34 49.5 23 98 -65 -14 27 49 -15 24 18 -14 22 25 -15 29 45 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32 51.4 35 92 -77 -19 12 17 -20 9 43 -19 6 47 -20 15 16 0.48 99 0 0 -20 3 56 16 32 40.7 36 91 -78 -19 35 15 -20 32 45 -19 29 45 -20 38 18 0.48 100 0 0 -20 27 3 16 32 29.7 37 91 -79 -19 58 20 -20 55 54 -19 52 49 -21 1 28 0.48 101 0 0 -20 50 16 16 32 18.5 38 90 -79 -20 21 31 -21 19 9 -20 16 0 -21 24 43 0.49 102 0 0 -21 13 35 16 32 7.1 39 89 -80 -20 44 48 -21 42 29 -20 39 17 -21 48 3 0.49 103 0 0 -21 36 58 16 31 55.5 40 89 -80 -21 8 9 -22 5 55 -21 2 38 -22 11 29 0.49 104 0 0 -22 0 26 16 31 43.7 40 88 -81 -21 31 36 -22 29 24 -21 26 4 -22 34 59 0.49 105 0 0 -22 23 58 16 31 31.7 41 87 -81 -21 55 6 -22 52 58 -21 49 35 -22 58 33 0.49 106 0 0 -22 47 34 16 31 19.6 42 87 -81 -22 18 41 -23 16 36 -22 13 8 -23 22 11 0.49 107 0 0 -23 11 13 16 31 7.3 43 86 -82 -22 42 18 -23 40 16 -22 36 45 -23 45 51 0.49 108 0 0 -23 34 53 16 30 54.8 44 85 -82 -23 5 57 -24 3 58 -23 0 24 -24 9 34 0.49 109 0 0 -23 58 36 16 30 42.2 45 84 -82 -23 29 38 -24 27 42 -23 24 6 -24 33 18 0.49 110 0 0 -24 22 20 16 30 29.4 46 83 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18 25 0.51 147 0 0 -38 3 2 16 21 54.7 63 23 -53 -37 34 13 -38 32 0 -37 28 41 -38 37 35 0.51 148 0 0 -38 22 1 16 21 41.0 63 21 -53 -37 53 13 -38 50 57 -37 47 41 -38 56 32 0.51 149 0 0 -38 40 45 16 21 27.5 63 19 -52 -38 11 58 -39 9 39 -38 6 28 -39 15 14 0.51 150 0 0 -38 59 15 16 21 14.0 63 17 -51 -38 30 30 -39 28 7 -38 25 0 -39 33 41 0.51 151 0 0 -39 17 30 16 21 0.6 63 15 -50 -38 48 47 -39 46 21 -38 43 17 -39 51 54 0.51 152 0 0 -39 35 30 16 20 47.3 63 13 -49 -39 6 50 -40 4 19 -39 1 20 -40 9 52 0.51 153 0 0 -39 53 16 16 20 34.1 62 11 -49 -39 24 37 -40 22 3 -39 19 8 -40 27 35 0.51 154 0 0 -40 10 47 16 20 21.0 62 8 -48 -39 42 10 -40 39 31 -39 36 41 -40 45 4 0.51 155 0 0 -40 28 2 16 20 7.9 62 6 -47 -39 59 27 -40 56 45 -39 53 59 -41 2 16 0.51 156 0 0 -40 45 2 16 19 55.0 62 4 -46 -40 16 29 -41 13 42 -40 11 1 -41 19 14 0.51 157 0 0 -41 1 46 16 19 42.1 62 2 -46 -40 33 16 -41 30 25 -40 27 48 -41 35 56 0.51 158 0 0 -41 18 15 16 19 29.4 61 0 -45 -40 49 47 -41 46 51 -40 44 20 -41 52 22 0.52 159 0 0 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18 16 12 54.6 44 308 -19 -47 48 13 -48 42 30 -47 43 2 -48 47 44 0.52 -164 0 0 -48 21 18 16 12 46.1 43 307 -18 -47 54 15 -48 48 28 -47 49 4 -48 53 42 0.52 -163 0 0 -48 27 1 16 12 37.6 43 306 -18 -47 59 59 -48 54 9 -47 54 49 -48 59 23 0.52 -162 0 0 -48 32 28 16 12 29.3 42 305 -17 -48 5 27 -48 59 34 -48 0 17 -49 4 48 0.52 -161 0 0 -48 37 38 16 12 21.1 42 304 -17 -48 10 39 -49 4 43 -48 5 29 -49 9 56 0.52 -160 0 0 -48 42 31 16 12 13.0 41 303 -16 -48 15 34 -49 9 35 -48 10 24 -49 14 47 0.52 -159 0 0 -48 47 8 16 12 5.0 41 303 -15 -48 20 12 -49 14 10 -48 15 3 -49 19 23 0.52 -158 0 0 -48 51 29 16 11 57.1 40 302 -15 -48 24 34 -49 18 30 -48 19 25 -49 23 42 0.52 -157 0 0 -48 55 33 16 11 49.3 39 301 -14 -48 28 39 -49 22 32 -48 23 30 -49 27 44 0.52 -156 0 0 -48 59 20 16 11 41.7 39 300 -13 -48 32 28 -49 26 19 -48 27 19 -49 31 30 0.52 -155 0 0 -49 2 51 16 11 34.1 38 299 -13 -48 36 0 -49 29 49 -48 30 52 -49 35 0 0.52 -154 0 0 -49 6 6 16 11 26.7 38 298 -12 -48 39 16 -49 33 2 -48 34 8 -49 38 14 0.52 -153 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-46 28 32 -45 28 12 -46 33 51 0.54 -104 0 0 -45 49 46 16 7 36.4 6 258 18 -45 22 15 -46 17 24 -45 16 58 -46 22 44 0.54 -103 0 0 -45 38 17 16 7 35.1 5 257 18 -45 10 43 -46 5 58 -45 5 26 -46 11 17 0.55 -102 0 0 -45 26 28 16 7 33.9 4 256 19 -44 58 52 -45 54 12 -44 53 34 -45 59 32 0.56 -101 0 0 -45 14 21 16 7 33.0 4 256 20 -44 46 42 -45 42 7 -44 41 24 -45 47 28 0.57 -100 0 0 -45 1 54 16 7 32.2 3 255 20 -44 34 12 -45 29 43 -44 28 54 -45 35 4 0.60 - 99 0 0 -44 49 8 16 7 31.6 2 254 21 -44 21 23 -45 17 0 -44 16 4 -45 22 22 0.63 - 98 0 0 -44 36 3 16 7 31.2 1 254 21 -44 8 15 -45 3 57 -44 2 56 -45 9 20 0.72 - 97 0 0 -44 22 38 16 7 30.9 1 253 22 -43 54 48 -44 50 35 -43 49 28 -44 55 58 1.03 Uncertainty in time = +/- 7 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 387-081472 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 40 12.8123 DE: -12 37 33.551 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 40 12.8124 DE: -12 37 33.550 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (202) Chryseis asteroid class: approx. diameter [km]: 88 approx. diameter ["]: 0.051 distance from Earth [AU]: 2.36650 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#98 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): 0.027", 0.002", 98.364° remarks: * orbital elements for (202)Chryseis : Mean anomaly = 105.0725424712 deg Arg. of pericenter = 359.7210933624 deg Long. of node = 136.7110690779 deg Inclination = 8.8501649482 deg Eccentricity = 0.1042772711 Semimajor axis = 3.0699506717 AU Perihelion dist = 2.7498245932 AU Mag: H = 7.57, G = 0.15 Epoch of elements : MJD 60068.68173611 TDT (2023 May 04.6817) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#982023Apr24,13.40,2023,5,4,16.364721,-0.143531,-0.429120,-3.527072,1.176829,-0.003796,-0.000674,0.000001,0.000000 157.6165,-12.6397,-66.27,16.03,False UCAC4 387-081472,17.67022562,-12.6259863,0.00,12.42,0.00,0.0,0,,17.69217396,-12.6396961,0.92,0.00,0,0,0 202,Chryseis,12.73,88.3,2.3665,0,0,-0.896,4.38,,4.4,0 0,104.9476,2023,5,4,359.7211,136.7111,8.8502,0.10428,3.06995,2.74982,7.61,5.0,0.15 1.096,0.0267,0.0016,98,0.0049,Known errors,-1.00,-1,-1,-1 20230504_081472,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org