IOTA/IOTA-ES occultation update for (1607) Mavis / TYC 4683-00566-1 event on 2008 Jan 04, 14:21 UT Visible from China, India Summary ------- On 2008 Jan 04 UT, the 12 km diameter asteroid (1607) Mavis will occult a 10.5 mag star in the constellation Cetus for observers along a path across China, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.6 mag to 15.1 mag (the magnitude of the asteroid) for at most 0.5 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 27 * date and approx. time of event: 2008 Jan 04, 14:16 - 2008 Jan 04, 14:26 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 4.6 * estimated maximum duration [s]: 0.5 * Moon: 13 % sunlit, 130° distance * Sun: 89° distance * rough path description: China, India The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 2.48 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .022 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .022", 177° ) * approx speed of asteroid's shadow [km/s]: 23.3258 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4683-00566-1 by 1607 Mavis on 2008 Jan 04 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 34 0 0 -26 28 32 14 16 59 0 94 86 -26 31 49 -26 25 16 -26 48 2 -26 9 1 - 33 0 0 -26 32 17 14 16 59 1 94 86 -26 35 33 -26 29 0 -26 51 46 -26 12 47 - 32 0 0 -26 35 31 14 16 59 2 93 86 -26 38 47 -26 32 15 -26 54 59 -26 16 1 - 31 0 0 -26 38 14 14 16 59 3 93 85 -26 41 30 -26 34 58 -26 57 43 -26 18 45 - 30 0 0 -26 40 28 14 17 0 4 92 85 -26 43 44 -26 37 12 -26 59 55 -26 20 59 - 29 0 0 -26 42 11 14 17 0 5 92 84 -26 45 26 -26 38 55 -27 1 38 -26 22 42 - 28 0 0 -26 43 23 14 17 0 6 92 84 -26 46 39 -26 40 7 -27 2 50 -26 23 55 - 27 0 0 -26 44 5 14 17 1 7 91 83 -26 47 21 -26 40 49 -27 3 32 -26 24 38 - 26 0 0 -26 44 17 14 17 1 8 91 82 -26 47 33 -26 41 1 -27 3 44 -26 24 49 - 25 0 0 -26 43 58 14 17 2 8 90 81 -26 47 14 -26 40 43 -27 3 26 -26 24 31 - 24 0 0 -26 43 9 14 17 3 9 90 81 -26 46 25 -26 39 53 -27 2 37 -26 23 41 - 23 0 0 -26 41 50 14 17 3 10 89 80 -26 45 6 -26 38 34 -27 1 17 -26 22 21 - 22 0 0 -26 40 0 14 17 4 11 89 79 -26 43 16 -26 36 44 -26 59 28 -26 20 31 - 21 0 0 -26 37 39 14 17 5 12 88 78 -26 40 55 -26 34 23 -26 57 7 -26 18 10 - 20 0 0 -26 34 48 14 17 6 13 88 77 -26 38 4 -26 31 31 -26 54 17 -26 15 18 - 19 0 0 -26 31 25 14 17 7 14 88 77 -26 34 42 -26 28 9 -26 50 55 -26 11 55 - 18 0 0 -26 27 33 14 17 8 15 87 76 -26 30 49 -26 24 16 -26 47 3 -26 8 1 - 17 0 0 -26 23 9 14 17 9 16 87 75 -26 26 26 -26 19 52 -26 42 41 -26 3 37 - 16 0 0 -26 18 15 14 17 10 17 86 74 -26 21 31 -26 14 58 -26 37 47 -25 58 41 - 15 0 0 -26 12 49 14 17 12 17 86 73 -26 16 6 -26 9 32 -26 32 23 -25 53 15 - 14 0 0 -26 6 53 14 17 13 18 85 72 -26 10 10 -26 3 36 -26 26 28 -25 47 17 - 13 0 0 -26 0 25 14 17 14 19 85 71 -26 3 43 -25 57 8 -26 20 1 -25 40 48 - 12 0 0 -25 53 26 14 17 16 20 85 70 -25 56 44 -25 50 9 -26 13 4 -25 33 48 - 11 0 0 -25 45 56 14 17 17 21 84 70 -25 49 14 -25 42 38 -26 5 35 -25 26 16 - 10 0 0 -25 37 55 14 17 19 22 84 69 -25 41 13 -25 34 36 -25 57 36 -25 18 13 - 9 0 0 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28 36 16 21 36 55 56 132 0 0 36 45 15 14 26 0 8 259 -72 36 41 57 36 48 34 36 25 30 37 5 1 133 0 0 36 53 54 14 26 0 7 259 -73 36 50 36 36 57 13 36 34 11 37 13 38 134 0 0 37 2 5 14 26 1 7 260 -73 36 58 47 37 5 23 36 42 24 37 21 47 135 0 0 37 9 48 14 26 1 6 261 -73 37 6 30 37 13 6 36 50 8 37 29 28 136 0 0 37 17 3 14 26 2 5 261 -74 37 13 45 37 20 21 36 57 25 37 36 41 137 0 0 37 23 50 14 26 2 4 262 -74 37 20 33 37 27 8 37 4 14 37 43 27 138 0 0 37 30 10 14 26 2 3 262 -74 37 26 53 37 33 27 37 10 35 37 49 46 139 0 0 37 36 3 14 26 2 3 263 -74 37 32 46 37 39 20 37 16 29 37 55 37 140 0 0 37 41 28 14 26 3 2 264 -74 37 38 11 37 44 45 37 21 56 38 1 1 141 0 0 37 46 26 14 26 3 1 264 -75 37 43 9 37 49 43 37 26 55 38 5 58 142 0 0 37 50 57 14 26 3 0 265 -75 37 47 41 37 54 13 37 31 27 38 10 28 Data for the target star ------------------------ * name: TYC 4683-00566-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 01 06.7196 DE: -04 01 52.238 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .023 ) * V mag [mag]: 10.5 * B mag [mag]: 11.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1607) Mavis approx. diameter [km]: 12 approx. diameter ["]: .010 distance from Earth [AU]: 1.64800 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 831 number of rejected observations: 26 time covered by the observations: 1903 Jan 22 - 2007 Dec 06 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.012, 166° remarks: * orbital elements for (1607) Mavis : Mean anomaly = 24.10665932 deg Arg. of pericenter = 236.01888154 deg Long. of node = 122.59274357 deg Inclination = 8.57808113 deg Eccentricity = 0.30445897 Semimajor axis = 2.55053145 AU Perihelion dist = 1.77399928 AU Mag: H = 11.32, G = 0.15 Epoch of elements : MJD 54469.59800000 TDT (2008 Jan 04.598) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 04 1607 Mavis 14h 21.5m UT 10.5 1 1 6.720- 4 1 52.24TYC 4683-00566-1 11.0 15.1 12 0.5 1.648 3.977 37.28 -303.675 -4.041 -34.18 -22.74 14.3585 -.05385 .08358 11.15638 6.99088 0.00497 0.00209 2000 21.784249520071226.00000236.018882122.592744 8.5780810.304458972.550531451.7739992811.35 0.15 RATE 2.4196806 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.026 0.022 176.9 3.480 0.025 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org