IOTA/IOTA-ES occultation update for (15518) 1999 VY153 / TYC 6262-00758-1 event on 2024 Apr 04, 23:17 UT Visible from Summary ------- On 2024 Apr 04 UT, the 10.548457856795 km diameter asteroid (15518) 1999 VY153 will occult a 9.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.40 mag to 18.13 mag (the magnitude of the asteroid) for at most 1.210 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 Apr 04, 23:07 - 2024 Apr 04, 23:28 * geocentric midpoint of event [JD]: 2460405.47073400 * magnitude of target star: 9.73 * magnitude drop [mag]: 8.40 * estimated maximum duration [s]: 1.210 * Moon: 20 % sunlit, 54° distance * Sun: 106° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.003", 101°) * approx speed of asteroid's shadow [km/s]: 9.0009 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6262-00758-1 by 15518 1999 VY153 on 2024 Apr 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 - 7 0 0 -15 34 26 23 7 35.3 0 112 -68 -15 38 7 -15 30 45 -15 40 53 -15 28 0 .... - 6 0 0 -15 58 14 23 7 35.5 1 112 -68 -16 1 56 -15 54 32 -16 4 41 -15 51 47 0.46 - 5 0 0 -16 22 23 23 7 35.9 2 111 -69 -16 26 6 -16 18 41 -16 28 52 -16 15 55 0.52 - 4 0 0 -16 46 53 23 7 36.7 3 111 -70 -16 50 36 -16 43 10 -16 53 23 -16 40 24 0.54 - 3 0 0 -17 11 44 23 7 37.6 4 111 -70 -17 15 27 -17 8 0 -17 18 14 -17 5 14 0.56 - 2 0 0 -17 36 54 23 7 38.9 5 111 -71 -17 40 38 -17 33 10 -17 43 25 -17 30 23 0.56 - 1 0 0 -18 2 23 23 7 40.4 6 110 -71 -18 6 8 -17 58 39 -18 8 56 -17 55 51 0.57 - 0 0 0 -18 28 11 23 7 42.3 7 110 -72 -18 31 57 -18 24 26 -18 34 45 -18 21 38 0.57 1 0 0 -18 54 17 23 7 44.3 8 110 -72 -18 58 3 -18 50 32 -19 0 52 -18 47 44 0.57 2 0 0 -19 20 41 23 7 46.7 10 109 -73 -19 24 27 -19 16 55 -19 27 16 -19 14 6 0.58 3 0 0 -19 47 21 23 7 49.3 11 109 -73 -19 51 8 -19 43 34 -19 53 57 -19 40 45 0.58 4 0 0 -20 14 17 23 7 52.2 12 109 -73 -20 18 5 -20 10 30 -20 20 55 -20 7 41 0.58 5 0 0 -20 41 29 23 7 55.3 13 108 -73 -20 45 17 -20 37 41 -20 48 7 -20 34 51 0.58 6 0 0 -21 8 55 23 7 58.8 14 108 -73 -21 12 44 -21 5 7 -21 15 34 -21 2 17 0.58 7 0 0 -21 36 35 23 8 2.5 15 107 -73 -21 40 24 -21 32 46 -21 43 15 -21 29 56 0.58 8 0 0 -22 4 28 23 8 6.4 16 107 -73 -22 8 17 -22 0 39 -22 11 9 -21 57 48 0.58 9 0 0 -22 32 33 23 8 10.6 17 106 -73 -22 36 23 -22 28 43 -22 39 15 -22 25 52 0.58 10 0 0 -23 0 50 23 8 15.1 18 106 -73 -23 4 40 -22 57 0 -23 7 32 -22 54 8 0.58 11 0 0 -23 29 17 23 8 19.8 19 106 -73 -23 33 8 -23 25 27 -23 36 0 -23 22 35 0.58 12 0 0 -23 57 54 23 8 24.8 20 105 -72 -24 1 46 -23 54 3 -24 4 38 -23 51 11 0.58 13 0 0 -24 26 40 23 8 30.0 21 105 -72 -24 30 32 -24 22 49 -24 33 25 -24 19 56 0.59 14 0 0 -24 55 34 23 8 35.4 22 104 -71 -24 59 26 -24 51 42 -25 2 19 -24 48 50 0.59 15 0 0 -25 24 35 23 8 41.1 23 104 -71 -25 28 28 -25 20 43 -25 31 21 -25 17 50 0.59 16 0 0 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29 56 -37 16 20 0.58 41 0 0 -37 49 52 23 12 12.4 46 81 -49 -37 53 45 -37 45 58 -37 56 39 -37 43 4 0.58 42 0 0 -38 16 19 23 12 22.1 47 80 -48 -38 20 13 -38 12 26 -38 23 6 -38 9 32 0.58 43 0 0 -38 42 30 23 12 31.8 48 79 -47 -38 46 23 -38 38 37 -38 49 17 -38 35 44 0.58 44 0 0 -39 8 23 23 12 41.6 49 78 -47 -39 12 16 -39 4 31 -39 15 9 -39 1 37 0.58 45 0 0 -39 33 58 23 12 51.4 49 76 -46 -39 37 51 -39 30 6 -39 40 44 -39 27 13 0.58 46 0 0 -39 59 15 23 13 1.2 50 75 -45 -40 3 7 -39 55 23 -40 6 0 -39 52 31 0.58 47 0 0 -40 24 13 23 13 11.1 51 73 -44 -40 28 4 -40 20 21 -40 30 57 -40 17 29 0.58 48 0 0 -40 48 51 23 13 20.9 51 72 -43 -40 52 42 -40 45 0 -40 55 34 -40 42 8 0.58 49 0 0 -41 13 9 23 13 30.8 52 71 -42 -41 17 0 -41 9 19 -41 19 52 -41 6 27 0.58 50 0 0 -41 37 7 23 13 40.7 52 69 -41 -41 40 57 -41 33 17 -41 43 49 -41 30 26 0.58 51 0 0 -42 0 44 23 13 50.6 53 67 -40 -42 4 34 -41 56 55 -42 7 25 -41 54 4 0.58 52 0 0 -42 24 1 23 14 0.4 54 66 -40 -42 27 50 -42 20 12 -42 30 41 -42 17 21 0.58 53 0 0 -42 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254 37 -45 42 34 -45 35 6 -45 45 21 -45 32 19 0.61 176 0 0 -45 19 29 23 27 44.0 13 253 37 -45 23 14 -45 15 45 -45 26 2 -45 12 57 0.61 177 0 0 -44 59 48 23 27 46.5 13 253 38 -45 3 33 -44 56 3 -45 6 21 -44 53 15 0.62 178 0 0 -44 39 46 23 27 49.0 12 252 38 -44 43 32 -44 36 0 -44 46 20 -44 33 12 0.62 179 0 0 -44 19 23 23 27 51.2 11 251 39 -44 23 10 -44 15 37 -44 25 58 -44 12 49 0.62 180 0 0 -43 58 40 23 27 53.4 10 250 39 -44 2 27 -43 54 54 -44 5 16 -43 52 5 0.62 -179 0 0 -43 37 37 23 27 55.4 9 250 40 -43 41 25 -43 33 50 -43 44 14 -43 31 1 0.63 -178 0 0 -43 16 15 23 27 57.2 9 249 40 -43 20 2 -43 12 27 -43 22 52 -43 9 38 0.63 -177 0 0 -42 54 32 23 27 58.9 8 248 41 -42 58 20 -42 50 44 -43 1 10 -42 47 54 0.64 -176 0 0 -42 32 30 23 28 0.5 7 248 41 -42 36 19 -42 28 42 -42 39 9 -42 25 52 0.65 -175 0 0 -42 10 9 23 28 1.9 6 247 42 -42 13 58 -42 6 20 -42 16 49 -42 3 30 0.65 -174 0 0 -41 47 29 23 28 3.1 5 246 42 -41 51 19 -41 43 40 -41 54 10 -41 40 49 0.67 -173 0 0 -41 24 31 23 28 4.1 5 246 43 -41 28 21 -41 20 41 -41 31 12 -41 17 50 0.68 -172 0 0 -41 1 15 23 28 5.0 4 245 43 -41 5 5 -40 57 25 -41 7 57 -40 54 34 0.70 -171 0 0 -40 37 41 23 28 5.7 3 244 43 -40 41 31 -40 33 50 -40 44 23 -40 30 59 0.74 -170 0 0 -40 13 49 23 28 6.3 2 244 44 -40 17 40 -40 9 59 -40 20 32 -40 7 7 0.81 -169 0 0 -39 49 41 23 28 6.6 1 243 44 -39 53 32 -39 45 50 -39 56 25 -39 42 58 0.98 -168 0 0 -39 25 17 23 28 6.8 0 242 44 -39 29 8 -39 21 25 -39 32 1 -39 18 33 2.49 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 6262-00758-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 57 12.0683 DE: -21 11 51.729 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 57 12.0684 DE: -21 11 51.729 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.7 * B mag [mag]: 10.7 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (15518) 1999 VY153 asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.10640 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2023 Apr 25 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): 0.017", 0.003", 100.6° remarks: * orbital elements for (15518)1999 VY153 : Mean anomaly = 51.9373686875 deg Arg. of pericenter = 99.4225711057 deg Long. of node = 79.4068304474 deg Inclination = 8.7265016707 deg Eccentricity = 0.1619235238 Semimajor axis = 2.7951256945 AU Perihelion dist = 2.3425290925 AU Mag: H = 13.40, G = 0.15 Epoch of elements : MJD 60404.97073404 TDT (2024 Apr 04.9707) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr25,1.21,2024,4,4,23.297616,-0.110856,-0.480683,4.950267,-1.142209,-0.005475,-0.000044,0.000000,0.000000 86.4403,-21.2017,-168.79,6.17,False TYC 6262-00758-1,17.95335228,-21.1977026,10.66,9.73,9.23,0.2,0,,17.97757274,-21.2017179,8.40,8.45,0,0,0 15518,1999 VY153,18.13,10.854,2.1064,0,0,1.478,-4.77,,1.2,0 0,51.7326,2024,4,4,99.4226,79.4068,8.7265,0.16192,2.79513,2.34253,13.40,5.0,0.15 1.373,0.0173,0.0025,101,0.0026,Known errors,1.35,0,-1,-1 20240404_0758-1,60139.27 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org