IOTA/IOTA-ES occultation update for (5648) 1990 VU1 / UCAC4 294-187395 event on 2022 May 14, 03:38 UT Visible from Africa Summary ------- On 2022 May 14 UT, the 59.3 km diameter asteroid (5648) 1990 VU1 will occult a 11.1 mag star in the constellation Sagittarius for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.69 mag to 16.81 mag (the magnitude of the asteroid) for at most 5.240 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: 51 * date and approx. time of event: 2022 May 14, 03:28 - 2022 May 14, 03:46 * geocentric midpoint of event [JD]: 2459713.65121784 * magnitude of target star: 11.13 * magnitude drop [mag]: 5.69 * estimated maximum duration [s]: 5.240 * Moon: 94 % sunlit, 71° distance * Sun: 137° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 1.26 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.003", 108°) * approx speed of asteroid's shadow [km/s]: 11.3271 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 294-187395 by 5648 1990 VU1 on 2022 May 14 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 ' " Longitude Longitude Longitude Longitude .. .. .. 24 0 0 .. .. .... .. .. .. ... .. .. ... .. .. 65 40 11 ... .. .. .... 65 58 59 23 0 0 3 28 49.5 1 235 33 65 27 47 66 30 28 64 10 13 ... .. .. .... 64 29 35 22 0 0 3 28 50.2 3 235 32 63 59 24 65 0 2 62 44 15 66 18 12 0.27 63 4 9 21 0 0 3 28 51.3 5 234 30 62 34 52 63 33 40 61 21 52 64 49 22 0.28 61 42 15 20 0 0 3 28 52.9 6 234 29 61 13 46 62 10 57 60 2 42 63 24 27 0.29 60 23 33 19 0 0 3 28 54.8 8 233 27 59 55 47 60 51 30 58 46 26 62 3 2 0.29 59 7 43 18 0 0 3 28 57.2 9 233 26 58 40 36 59 35 1 57 32 50 60 44 47 0.29 57 54 31 17 0 0 3 29 0.0 11 232 25 57 27 59 58 21 12 56 21 38 59 29 23 0.29 56 43 42 16 0 0 3 29 3.1 12 232 23 56 17 43 57 9 51 55 12 39 58 16 35 0.29 55 35 5 15 0 0 3 29 6.5 14 232 22 55 9 35 56 0 44 54 5 42 57 6 9 0.29 54 28 29 14 0 0 3 29 10.3 15 232 21 54 3 25 54 53 40 53 0 37 55 57 54 0.29 53 23 44 13 0 0 3 29 14.4 17 231 20 52 59 4 53 48 30 51 57 15 54 51 38 0.29 52 20 41 12 0 0 3 29 18.8 18 231 18 51 56 24 52 45 5 50 55 29 53 47 13 0.29 51 19 14 11 0 0 3 29 23.4 20 231 17 50 55 17 51 43 16 49 55 12 52 44 30 0.29 50 19 14 10 0 0 3 29 28.4 21 231 16 49 55 36 50 42 58 48 56 17 51 43 21 0.29 49 20 36 9 0 0 3 29 33.6 22 231 15 48 57 15 49 44 2 47 58 38 50 43 40 0.29 48 23 14 8 0 0 3 29 39.0 24 231 14 48 0 9 48 46 24 47 2 10 49 45 19 0.30 47 27 2 7 0 0 3 29 44.8 25 231 12 47 4 11 47 49 57 46 6 48 48 48 14 0.30 46 31 56 6 0 0 3 29 50.7 26 231 11 46 9 18 46 54 38 45 12 27 47 52 19 0.30 45 37 51 5 0 0 3 29 56.9 28 231 10 45 15 25 46 0 20 44 19 3 46 57 30 0.30 44 44 42 4 0 0 3 30 3.3 29 231 9 44 22 28 45 7 1 43 26 32 46 3 41 0.30 43 52 27 3 0 0 3 30 9.9 30 231 8 43 30 22 44 14 35 42 34 51 45 10 48 0.30 43 1 1 2 0 0 3 30 16.8 31 231 7 42 39 5 43 22 59 41 43 56 44 18 48 0.30 42 10 20 1 0 0 3 30 23.8 33 231 6 41 48 33 42 32 11 40 53 43 43 27 38 0.30 41 20 22 0 0 0 3 30 31.0 34 231 5 40 58 42 41 42 5 40 4 10 42 37 13 0.30 40 31 4 - 1 0 0 3 30 38.5 35 232 4 40 9 30 40 52 40 39 15 14 41 47 30 0.30 Latitude Latitude Latitude Latitude 39 0 0 - 2 52 47 3 30 53.0 37 232 2 - 2 26 1 - 3 19 38 - 1 18 49 - 4 27 59 0.29 38 0 0 - 4 8 24 3 31 3.1 39 232 0 - 3 41 24 - 4 35 31 - 2 33 36 - 5 44 29 0.30 37 0 0 - 5 25 0 3 31 13.5 41 233 -1 - 4 57 45 - 5 52 21 - 3 49 22 - 7 1 57 0.30 36 0 0 - 6 42 29 3 31 24.4 42 233 -2 - 6 15 1 - 7 10 5 - 5 6 3 - 8 20 18 0.30 35 0 0 - 8 0 48 3 31 35.7 44 234 -4 - 7 33 6 - 8 28 38 - 6 23 34 - 9 39 28 0.30 34 0 0 - 9 19 52 3 31 47.4 45 235 -5 - 8 51 56 - 9 47 55 - 7 41 51 -10 59 20 0.30 33 0 0 -10 39 36 3 31 59.4 47 235 -6 -10 11 27 -11 7 52 - 9 0 50 -12 19 51 0.30 32 0 0 -11 59 53 3 32 11.7 48 236 -8 -11 31 32 -12 28 22 -10 20 24 -13 40 55 0.30 31 0 0 -13 20 40 3 32 24.4 50 237 -9 -12 52 6 -13 49 21 -11 40 28 -15 2 26 0.30 30 0 0 -14 41 49 3 32 37.4 51 238 -10 -14 13 4 -15 10 42 -13 0 58 -16 24 17 0.30 29 0 0 -16 3 15 3 32 50.6 53 239 -11 -15 34 18 -16 32 19 -14 21 46 -17 46 23 0.30 28 0 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7 45 -66 48 36 -65 16 24 -67 40 30 0.33 -119 0 0 -66 11 3 3 45 56.5 22 118 -28 -65 50 28 -66 31 41 -64 58 39 -67 24 4 0.33 -120 0 0 -65 53 17 3 45 58.4 21 119 -28 -65 32 30 -66 14 7 -64 40 12 -67 7 0 0.33 -121 0 0 -65 34 48 3 46 0.3 21 120 -28 -65 13 49 -65 55 50 -64 21 2 -66 49 14 0.33 -122 0 0 -65 15 36 3 46 2.2 20 121 -27 -64 54 25 -65 36 50 -64 1 7 -66 30 46 0.33 -123 0 0 -64 55 39 3 46 4.1 20 122 -27 -64 34 15 -65 17 6 -63 40 25 -66 11 34 0.33 -124 0 0 -64 34 54 3 46 6.0 19 123 -27 -64 13 17 -64 56 34 -63 18 56 -65 51 36 0.33 -125 0 0 -64 13 21 3 46 7.9 19 124 -26 -63 51 31 -64 35 14 -62 56 36 -65 30 51 0.33 -126 0 0 -63 50 57 3 46 9.8 18 125 -26 -63 28 53 -64 13 4 -62 33 24 -65 9 16 0.33 -127 0 0 -63 27 41 3 46 11.7 17 126 -26 -63 5 23 -63 50 2 -62 9 19 -64 46 50 0.33 -128 0 0 -63 3 30 3 46 13.5 17 127 -25 -62 40 57 -63 26 6 -61 44 17 -64 23 31 0.33 -129 0 0 -62 38 22 3 46 15.3 16 128 -25 -62 15 35 -63 1 13 -61 18 19 -63 59 17 0.33 -130 0 0 -62 12 16 3 46 17.1 16 128 -24 -61 49 14 -62 35 22 -60 51 20 -63 34 5 0.33 -131 0 0 -61 45 9 3 46 18.9 15 129 -24 -61 21 52 -62 8 31 -60 23 19 -63 7 53 0.33 -132 0 0 -61 16 59 3 46 20.7 14 130 -24 -60 53 25 -61 40 36 -59 54 14 -62 40 40 0.33 -133 0 0 -60 47 43 3 46 22.4 14 131 -23 -60 23 53 -61 11 37 -59 24 2 -62 12 21 0.33 -134 0 0 -60 17 19 3 46 24.1 13 132 -23 -59 53 13 -60 41 29 -58 52 40 -61 42 56 0.33 -135 0 0 -59 45 44 3 46 25.7 12 133 -22 -59 21 21 -60 10 11 -58 20 7 -61 12 22 0.33 -136 0 0 -59 12 56 3 46 27.3 11 134 -22 -58 48 16 -59 37 40 -57 46 20 -60 40 35 0.33 -137 0 0 -58 38 52 3 46 28.8 11 135 -21 -58 13 55 -59 3 53 -57 11 16 -60 7 33 0.34 -138 0 0 -58 3 29 3 46 30.3 10 135 -21 -57 38 15 -58 28 48 -56 34 52 -59 33 13 0.34 -139 0 0 -57 26 44 3 46 31.7 9 136 -20 -57 1 13 -57 52 22 -55 57 6 -58 57 32 0.34 -140 0 0 -56 48 36 3 46 33.0 8 137 -20 -56 22 46 -57 14 31 -55 17 55 -58 20 28 0.34 -141 0 0 -56 8 59 3 46 34.3 7 138 -19 -55 42 52 -56 35 13 -54 37 16 -57 41 57 0.35 -142 0 0 -55 27 53 3 46 35.4 6 139 -18 -55 1 27 -55 54 25 -53 55 6 -57 1 57 0.35 -143 0 0 -54 45 14 3 46 36.4 6 140 -18 -54 18 30 -55 12 5 -53 11 23 -56 20 24 0.36 -144 0 0 -54 0 59 3 46 37.3 5 140 -17 -53 33 56 -54 28 8 -52 26 4 -55 37 15 0.37 -145 0 0 -53 15 5 3 46 38.0 4 141 -16 -52 47 44 -53 42 33 -51 39 6 -54 52 27 0.39 -146 0 0 -52 27 29 3 46 38.6 3 142 -16 -51 59 50 -52 55 16 -50 50 27 -54 5 58 0.43 -147 0 0 -51 38 10 3 46 39.0 2 143 -15 -51 10 12 -52 6 14 -50 0 3 -53 17 44 0.51 -148 0 0 -50 47 3 3 46 39.3 1 144 -14 -50 18 47 -51 15 26 .. .. .. -52 27 43 0.90 Uncertainty in time = +/- 7 secs Prediction of 2022 Mar 15.4 Data for the target star ------------------------ * name: UCAC4 294-187395 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 24 56.9104 DE: -31 14 49.658 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 24 56.9105 DE: -31 14 49.658 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5648) 1990 VU1 asteroid class: approx. diameter [km]: 59 approx. diameter ["]: 0.021 distance from Earth [AU]: 3.96210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2021 Nov 10 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): 0.029", 0.003", 108.002° remarks: * orbital elements for (5648)1990 VU1 : Mean anomaly = 305.6644983864 deg Arg. of pericenter = 269.0679738352 deg Long. of node = 71.0379504467 deg Inclination = 22.7050058649 deg Eccentricity = 0.1669441586 Semimajor axis = 5.1436440938 AU Perihelion dist = 4.2849427584 AU Mag: H = 9.86, G = 0.15 Epoch of elements : MJD 59713.15145833 TDT (2022 May 14.1515) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482021Nov10,5.24,2022,5,14,3.629228,0.220688,-0.214992,-4.450271,-4.590161,-0.003924,0.000412,0.000001,0.000000 -9.7060,-31.2342,124.66,18.61,False UCAC4 294-187395,18.41580846,-31.2471273,0.00,11.13,0.00,0.0,0,,18.43992189,-31.2342062,5.69,0.00,0,0,0 5648,1990 VU1,16.81,59.3,3.9621,0,0,-0.770,-10.19,,6.0 0,305.6517,2022,5,14,269.0680,71.0380,22.7050,0.16694,5.14364,4.28494,9.86,5.0,0.15 2.263,0.0290,0.0028,108,0.0261,Known errors,-1.00,-1,-1,-1 20220514_187395,59653.43 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Mar 15, 10:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org