IOTA/IOTA-ES occultation update for (25263) 1998 VM16 / TYC 4983-00198-1 event on 2024 Jan 01, 17:16 UT Visible from Summary ------- On 2024 Jan 01 UT, the 16.8036983384075 km diameter asteroid (25263) 1998 VM16 will occult a 9.4 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.28 mag to 18.70 mag (the magnitude of the asteroid) for at most 0.580 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: 85 * date and approx. time of event: 2024 Jan 01, 17:13 - 2024 Jan 01, 17:19 * geocentric midpoint of event [JD]: 2460311.21974117 * magnitude of target star: 9.42 * magnitude drop [mag]: 9.28 * estimated maximum duration [s]: 0.580 * Moon: 72 % sunlit, 51° distance * Sun: 65° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.60 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.001", 121°) * approx speed of asteroid's shadow [km/s]: 29.1947 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4983-00198-1 by 25263 1998 VM16 on 2024 Jan 1 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 128 0 0 - 7 1 55 17 13 7.5 1 95 -51 - 7 7 2 - 6 56 48 - 7 13 12 - 6 50 40 .... 129 0 0 - 7 7 54 17 13 7.6 2 95 -50 - 7 13 2 - 7 2 47 - 7 19 12 - 6 56 38 0.36 130 0 0 - 7 14 15 17 13 7.7 3 95 -50 - 7 19 22 - 7 9 8 - 7 25 33 - 7 2 58 0.40 131 0 0 - 7 20 57 17 13 8.0 4 95 -49 - 7 26 5 - 7 15 49 - 7 32 15 - 7 9 40 0.42 132 0 0 - 7 28 0 17 13 8.3 5 95 -48 - 7 33 8 - 7 22 52 - 7 39 18 - 7 16 42 0.43 133 0 0 - 7 35 24 17 13 8.7 6 94 -47 - 7 40 32 - 7 30 16 - 7 46 43 - 7 24 6 0.43 134 0 0 - 7 43 9 17 13 9.2 7 94 -47 - 7 48 18 - 7 38 1 - 7 54 29 - 7 31 51 0.44 135 0 0 - 7 51 15 17 13 9.7 8 94 -46 - 7 56 24 - 7 46 7 - 8 2 36 - 7 39 56 0.44 136 0 0 - 7 59 42 17 13 10.3 9 94 -45 - 8 4 51 - 7 54 34 - 8 11 3 - 7 48 23 0.44 137 0 0 - 8 8 30 17 13 11.0 10 94 -44 - 8 13 39 - 8 3 21 - 8 19 51 - 7 57 10 0.45 138 0 0 - 8 17 39 17 13 11.8 11 94 -43 - 8 22 48 - 8 12 29 - 8 29 0 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0.48 - 64 0 0 -43 24 2 17 19 39.6 11 273 66 -43 29 6 -43 18 57 -43 35 13 -43 12 51 0.48 - 63 0 0 -43 22 23 17 19 40.2 10 272 66 -43 27 28 -43 17 18 -43 33 35 -43 11 12 0.48 - 62 0 0 -43 20 28 17 19 40.7 9 272 65 -43 25 33 -43 15 23 -43 31 40 -43 9 17 0.48 - 61 0 0 -43 18 17 17 19 41.2 9 271 65 -43 23 22 -43 13 12 -43 29 29 -43 7 6 0.48 - 60 0 0 -43 15 50 17 19 41.6 8 270 64 -43 20 55 -43 10 45 -43 27 3 -43 4 39 0.49 - 59 0 0 -43 13 7 17 19 42.0 7 270 64 -43 18 13 -43 8 2 -43 24 20 -43 1 56 0.49 - 58 0 0 -43 10 8 17 19 42.4 6 269 63 -43 15 14 -43 5 3 -43 21 21 -42 58 56 0.49 - 57 0 0 -43 6 53 17 19 42.7 6 268 63 -43 11 59 -43 1 48 -43 18 6 -42 55 41 0.50 - 56 0 0 -43 3 22 17 19 43.0 5 268 62 -43 8 28 -42 58 16 -43 14 36 -42 52 9 0.50 - 55 0 0 -42 59 35 17 19 43.3 4 267 62 -43 4 40 -42 54 29 -43 10 49 -42 48 22 0.51 - 54 0 0 -42 55 31 17 19 43.5 4 266 61 -43 0 37 -42 50 25 -43 6 46 -42 44 18 0.52 - 53 0 0 -42 51 12 17 19 43.6 3 266 61 -42 56 18 -42 46 6 -43 2 27 -42 39 58 0.54 - 52 0 0 -42 46 36 17 19 43.8 2 265 60 -42 51 43 -42 41 30 -42 57 52 -42 35 22 0.57 - 51 0 0 -42 41 45 17 19 43.9 1 264 59 -42 46 51 -42 36 38 -42 53 1 -42 30 30 0.63 - 50 0 0 -42 36 37 17 19 43.9 1 264 59 -42 41 44 -42 31 31 -42 47 54 -42 25 22 0.85 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 4983-00198-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 26 02.2123 DE: -05 03 51.042 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 26 02.2126 DE: -05 03 51.044 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.4 * B mag [mag]: 9.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (25263) 1998 VM16 asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.16160 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#37 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): 0.018", 0.001", 121.407° remarks: * orbital elements for (25263)1998 VM16 : Mean anomaly = 45.0028883294 deg Arg. of pericenter = 72.4104720106 deg Long. of node = 64.0408612744 deg Inclination = 13.3684925238 deg Eccentricity = 0.1648991075 Semimajor axis = 3.2073738317 AU Perihelion dist = 2.6784807493 AU Mag: H = 12.97, G = 0.15 Epoch of elements : MJD 60310.71974141 TDT (2024 Jan 01.7197) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#372023Apr25,0.58,2024,1,1,17.273788,-0.128770,-0.397941,15.689454,-5.037416,-0.004965,0.002112,-0.000001,0.000000 -143.1478,-5.1722,-78.25,-23.00,False TYC 4983-00198-1,14.43394782,-5.0641781,9.64,9.42,9.30,0.1,0,,14.45464576,-5.1721857,9.28,8.95,0,0,0 25263,1998 VM16,18.70,17.033,3.1616,0,0,2.922,-14.01,,2.4,0 0,44.8794,2024,1,1,72.4105,64.0409,13.3685,0.16490,3.20737,2.67848,12.97,5.0,0.15 1.601,0.0183,0.0011,121,0.0044,Known errors,1.09,0,-1,-1 20240101_0198-1,60136.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 11, 23:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org