IOTA/IOTA-ES occultation update for (444) Gyptis / TYC 0694-01184-1 event on 2007 Oct 14, 01:06 UT Visible from Iceland, UK, France, Spain, W Africa Summary ------- On 2007 Oct 14 UT, the 163 km diameter asteroid (444) Gyptis will occult a 10.2 mag star in the constellation Taurus for observers along a path across Iceland, UK, France, Spain, W Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 11.8 mag (the magnitude of the asteroid) for at most 29.2 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: 99 * date and approx. time of event: 2007 Oct 14, 00:50 - 2007 Oct 14, 01:22 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 29.2 * Moon: 7 % sunlit, 157° distance * Sun: 130° distance * rough path description: Iceland, UK, France, Spain, W Africa The occultation path -------------------- * approximate projected width [km]: 187 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 5.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .029", .023", 89° ) * approx speed of asteroid's shadow [km/s]: 5.5887 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0694-01184-1 by 444 Gyptis on 2007 Oct 14 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude - 80 52 49 70 47 46 0 50 0 4 62 -16 - 71 53 7 72 45 45 ... .. .. .. .. .. - 68 41 48 73 22 1 ... .. .. .. .. .. - 57 1 51 72 28 59 0 50 25 12 84 -21 - 51 36 53 73 12 19 - 62 54 29 71 34 10 - 49 19 45 73 28 40 - 65 43 44 71 4 49 - 42 45 41 71 45 35 0 50 51 16 98 -24 - 38 23 39 72 9 44 - 47 19 19 71 16 14 - 36 31 24 72 18 56 - 49 24 18 71 1 22 - 32 52 43 70 22 26 0 51 16 20 107 -27 - 29 12 14 70 36 56 - 36 40 55 70 4 41 - 27 37 25 70 42 23 - 38 24 6 69 55 43 - 25 45 9 68 43 35 0 51 41 23 113 -29 - 22 34 58 68 52 25 - 29 1 12 68 32 27 - 21 13 1 68 55 38 - 30 29 29 68 26 45 - 20 26 44 66 58 37 0 52 6 25 118 -31 - 17 39 23 67 3 52 - 23 18 47 66 51 37 - 16 27 8 67 5 40 - 24 36 5 66 47 57 - 16 22 53 65 11 51 0 52 32 28 122 -33 - 13 53 8 65 14 43 - 18 56 31 65 7 37 - 12 48 24 65 15 34 - 20 5 25 65 5 17 - 13 11 43 63 25 21 0 52 57 30 124 -35 - 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8 40 52 -14 13 4 - 10 32 11 -14 8 56 - 8 16 46 -14 14 8 - 10 57 5 -14 8 11 - 10 22 43 -15 40 36 1 16 55 42 55 -63 - 9 26 33 -15 42 38 - 11 19 40 -15 38 52 - 9 2 5 -15 43 38 - 11 44 59 -15 38 13 - 11 12 33 -17 12 1 1 17 21 41 54 -62 - 10 15 24 -17 13 51 - 12 10 34 -17 10 31 - 9 50 30 -17 14 46 - 12 36 23 -17 9 57 - 12 6 8 -18 45 18 1 17 46 39 54 -61 - 11 7 49 -18 46 54 - 13 5 23 -18 44 3 - 10 42 26 -18 47 43 - 13 31 46 -18 43 37 - 13 4 0 -20 20 41 1 18 11 38 54 -60 - 12 4 20 -20 22 1 - 14 4 41 -20 19 44 - 11 38 23 -20 22 43 - 14 31 44 -20 19 26 - 14 6 50 -21 58 27 1 18 36 36 53 -59 - 13 5 35 -21 59 28 - 15 9 13 -21 57 51 - 12 38 58 -22 0 2 - 15 37 2 -21 57 43 - 15 15 29 -23 38 56 1 19 2 34 53 -58 - 14 12 22 -23 39 33 - 16 19 53 -23 38 45 - 13 44 58 -23 39 58 - 16 48 39 -23 38 49 - 16 31 6 -25 22 32 1 19 27 32 53 -56 - 15 25 44 -25 22 41 - 17 37 55 -25 22 53 - 14 57 24 -25 22 54 - 18 7 49 -25 23 12 - 17 55 10 -27 9 48 1 19 52 30 53 -55 - 16 47 3 -27 9 22 - 19 4 59 -27 10 48 - 16 17 35 -27 9 21 - 19 36 17 -27 11 25 - 19 29 45 -29 1 25 1 20 17 28 54 -53 - 18 18 13 -29 0 14 - 20 43 21 -29 3 15 - 17 47 20 -28 59 55 - 21 16 27 -29 4 17 - 21 17 50 -30 58 21 1 20 43 26 54 -51 - 20 1 52 -30 56 11 - 22 36 22 -31 1 19 - 19 29 10 -30 55 27 - 23 11 50 -31 2 53 - 23 23 54 -33 1 59 1 21 8 23 55 -49 - 22 1 58 -32 58 27 - 24 49 14 -33 6 31 - 21 26 52 -32 57 11 - 25 28 0 -33 8 52 - 25 55 26 -35 14 30 1 21 33 20 56 -47 - 24 24 53 -35 8 57 - 27 30 51 -35 21 26 - 23 46 23 -35 6 54 - 28 14 38 -35 24 59 - 29 6 21 -37 39 48 1 21 58 17 58 -44 - 27 21 59 -37 30 56 - 30 58 50 -37 50 51 - 26 38 11 -37 27 37 - 31 51 30 -37 56 34 - 33 29 25 -40 26 35 1 22 24 13 60 -41 - 31 17 41 -40 11 2 - 36 0 3 -40 47 0 - 30 24 2 -40 5 19 - 37 15 6 -40 58 12 - 41 27 39 -44 11 2 1 22 49 6 65 -36 - 37 30 48 -43 29 36 ... .. .. .. .. .. - 36 8 29 -43 16 50 ... .. .. .. .. .. Data for the target star ------------------------ * name: TYC 0694-01184-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 38 00.7365 DE: +13 12 59.964 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 10.2 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (444) Gyptis approx. diameter [km]: 163 approx. diameter ["]: .131 distance from Earth [AU]: 1.72200 * orbital information: orbit source: Preston date of fit: 2007 Oct 09 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 775 number of rejected observations: 126 time covered by the observations: 1900 Jul 25 - 2007 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.013, 87° remarks: * orbital elements for (444) Gyptis : Mean anomaly = 44.94688653 deg Arg. of pericenter = 155.25469005 deg Long. of node = 195.83542707 deg Inclination = 10.27786131 deg Eccentricity = 0.17308341 Semimajor axis = 2.77189319 AU Perihelion dist = 2.29212446 AU Mag: H = 7.88, G = 0.22 Epoch of elements : MJD 54387.04600000 TDT (2007 Oct 14.046) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Oct 14 444 Gyptis 1h 6.4m UT 10.2 4 38 0.736 13 12 59.96TYC 0694-01184-1 10.5 11.8 163 29.2 1.722 -0.238 -15.74 30.693 13.221 159.95 -7.94 1.1068 -.48154 .10627 -0.67600 -3.08114 -0.00436 -0.00005 2000 43.4420760200710 7.00000155.254690195.835427 10.2778610.173083412.771893192.292124467.835 0.22 RATE 2.1356955 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.029 0.023 88.5 1.220 0.028 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 10, 02:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org