IOTA/IOTA-ES occultation update for (444) Gyptis / TYC 0695-00588-1 event on 2008 Mar 27, 16:28 UT Visible from Arabia, Africa Summary ------- On 2008 Mar 27 UT, the 163 km diameter asteroid (444) Gyptis will occult a 11.9 mag star in the constellation Orion for observers along a path across Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.7 mag to 13.3 mag (the magnitude of the asteroid) for at most 5.4 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: . The event at a glimpse ---------------------- * Rank: 26 * date and approx. time of event: 2008 Mar 27, 16:29 - 2008 Mar 27, 16:31 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 1.7 * estimated maximum duration [s]: 5.4 * Moon: 71 % sunlit, 165° distance * Sun: 65° distance * rough path description: Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 171 * 1 sigma uncertainty interval [path widths]: +/- 2.56 * 1 sigma uncertainty interval [seconds]: +/- 10.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .146 +/- .191) * 1 sigma uncertainty ellipse (major, minor, PA): ( .191", .146", 360° ) * approx speed of asteroid's shadow [km/s]: 30.0350 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0695-00588-1 by 444 Gyptis on 2008 Mar 27 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 24 0 0 - 1 1 16 16 29 27 61 301 0 - 1 48 6 - 0 14 37 - 5 51 39 3 41 18 25 0 0 - 0 55 21 16 29 31 60 299 -1 - 1 42 10 - 0 8 44 - 5 45 34 3 47 4 26 0 0 - 0 49 47 16 29 34 60 298 -2 - 1 36 35 - 0 3 12 - 5 39 51 3 52 29 27 0 0 - 0 44 33 16 29 37 59 298 -3 - 1 31 20 0 2 0 - 5 34 28 3 57 35 28 0 0 - 0 39 40 16 29 41 58 297 -4 - 1 26 25 0 6 52 - 5 29 27 4 2 20 29 0 0 - 0 35 8 16 29 44 57 296 -5 - 1 21 52 0 11 24 - 5 24 47 4 6 45 30 0 0 - 0 30 56 16 29 47 56 295 -6 - 1 17 38 0 15 34 - 5 20 28 4 10 51 31 0 0 - 0 27 5 16 29 51 55 294 -7 - 1 13 46 0 19 25 - 5 16 30 4 14 36 32 0 0 - 0 23 34 16 29 54 54 294 -8 - 1 10 15 0 22 54 - 5 12 53 4 18 1 33 0 0 - 0 20 24 16 29 57 53 293 -9 - 1 7 4 0 26 3 - 5 9 38 4 21 5 34 0 0 - 0 17 35 16 30 0 52 293 -10 - 1 4 14 0 28 51 - 5 6 44 4 23 50 35 0 0 - 0 15 7 16 30 3 52 292 -11 - 1 1 46 0 31 19 - 5 4 11 4 26 14 36 0 0 - 0 13 0 16 30 6 51 291 -12 - 0 59 38 0 33 25 - 5 2 0 4 28 17 37 0 0 - 0 11 14 16 30 9 50 291 -13 - 0 57 51 0 35 11 - 5 0 10 4 30 1 38 0 0 - 0 9 48 16 30 12 49 291 -14 - 0 56 25 0 36 36 - 4 58 42 4 31 24 39 0 0 - 0 8 43 16 30 15 48 290 -15 - 0 55 20 0 37 41 - 4 57 35 4 32 27 40 0 0 - 0 7 59 16 30 18 47 290 -16 - 0 54 36 0 38 24 - 4 56 49 4 33 9 41 0 0 - 0 7 36 16 30 21 46 289 -17 - 0 54 12 0 38 47 - 4 56 26 4 33 31 42 0 0 - 0 7 34 16 30 24 45 289 -18 - 0 54 10 0 38 49 - 4 56 23 4 33 33 43 0 0 - 0 7 53 16 30 27 44 289 -19 - 0 54 29 0 38 30 - 4 56 42 4 33 14 44 0 0 - 0 8 33 16 30 29 43 288 -20 - 0 55 9 0 37 51 - 4 57 22 4 32 36 45 0 0 - 0 9 33 16 30 32 42 288 -21 - 0 56 10 0 36 51 - 4 58 24 4 31 36 46 0 0 - 0 10 55 16 30 35 41 288 -22 - 0 57 31 0 35 30 - 4 59 47 4 30 17 47 0 0 - 0 12 37 16 30 37 40 288 -23 - 0 59 13 0 33 48 - 5 1 32 4 28 37 48 0 0 - 0 14 39 16 30 40 39 287 -24 - 1 1 17 0 31 46 - 5 3 37 4 26 38 49 0 0 - 0 17 3 16 30 42 38 287 -25 - 1 3 41 0 29 23 - 5 6 5 4 24 17 50 0 0 - 0 19 47 16 30 45 37 287 -26 - 1 6 25 0 26 40 - 5 8 53 4 21 37 51 0 0 - 0 22 52 16 30 47 36 287 -27 - 1 9 31 0 23 36 - 5 12 2 4 18 37 52 0 0 - 0 26 17 16 30 49 35 287 -28 - 1 12 57 0 20 11 - 5 15 33 4 15 17 53 0 0 - 0 30 2 16 30 52 34 286 -29 - 1 16 44 0 16 26 - 5 19 24 4 11 37 54 0 0 - 0 34 9 16 30 54 33 286 -30 - 1 20 51 0 12 21 - 5 23 37 4 7 36 55 0 0 - 0 38 35 16 30 56 32 286 -31 - 1 25 18 0 7 56 - 5 28 10 4 3 16 56 0 0 - 0 43 22 16 30 58 31 286 -32 - 1 30 6 0 3 10 - 5 33 4 3 58 37 57 0 0 - 0 48 29 16 31 0 30 286 -33 - 1 35 14 - 0 1 55 - 5 38 19 3 53 37 58 0 0 - 0 53 56 16 31 2 29 286 -34 - 1 40 43 - 0 7 21 - 5 43 54 3 48 18 59 0 0 - 0 59 43 16 31 4 28 286 -35 - 1 46 31 - 0 13 7 - 5 49 50 3 42 39 60 0 0 - 1 5 50 16 31 6 27 286 -36 - 1 52 40 - 0 19 12 - 5 56 7 3 36 41 61 0 0 - 1 12 17 16 31 7 26 285 -37 - 1 59 8 - 0 25 38 - 6 2 43 3 30 23 62 0 0 - 1 19 3 16 31 9 25 285 -38 - 2 5 56 - 0 32 22 - 6 9 40 3 23 47 63 0 0 - 1 26 9 16 31 11 24 285 -40 - 2 13 4 - 0 39 27 - 6 16 57 3 16 51 64 0 0 - 1 33 35 16 31 12 23 285 -41 - 2 20 31 - 0 46 51 - 6 24 34 3 9 35 65 0 0 - 1 41 20 16 31 14 22 285 -42 - 2 28 18 - 0 54 34 - 6 32 30 3 2 1 66 0 0 - 1 49 24 16 31 15 21 285 -43 - 2 36 24 - 1 2 36 - 6 40 46 2 54 8 67 0 0 - 1 57 47 16 31 17 20 285 -44 - 2 44 49 - 1 10 57 - 6 49 22 2 45 57 68 0 0 - 2 6 29 16 31 18 19 285 -45 - 2 53 34 - 1 19 38 - 6 58 17 2 37 26 69 0 0 - 2 15 31 16 31 19 18 285 -46 - 3 2 37 - 1 28 37 - 7 7 31 2 28 38 70 0 0 - 2 24 50 16 31 21 17 285 -47 - 3 11 59 - 1 37 54 - 7 17 5 2 19 31 71 0 0 - 2 34 28 16 31 22 16 285 -48 - 3 21 39 - 1 47 30 - 7 26 57 2 10 5 72 0 0 - 2 44 25 16 31 23 15 285 -49 - 3 31 38 - 1 57 25 - 7 37 8 2 0 22 73 0 0 - 2 54 40 16 31 24 14 284 -50 - 3 41 55 - 2 7 37 - 7 47 37 1 50 21 74 0 0 - 3 5 12 16 31 25 13 284 -51 - 3 52 30 - 2 18 7 - 7 58 24 1 40 2 75 0 0 - 3 16 3 16 31 26 12 284 -52 - 4 3 23 - 2 28 56 - 8 9 30 1 29 25 76 0 0 - 3 27 11 16 31 26 11 284 -53 - 4 14 33 - 2 40 1 - 8 20 53 1 18 32 77 0 0 - 3 38 36 16 31 27 10 284 -54 - 4 26 1 - 2 51 24 - 8 32 34 1 7 21 78 0 0 - 3 50 19 16 31 28 9 284 -55 - 4 37 46 - 3 3 5 - 8 44 33 0 55 53 79 0 0 - 4 2 19 16 31 28 8 284 -56 - 4 49 49 - 3 15 2 - 8 56 48 0 44 8 80 0 0 - 4 14 35 16 31 29 7 284 -57 - 5 2 8 - 3 27 16 - 9 9 21 0 32 6 81 0 0 - 4 27 8 16 31 29 6 284 -58 - 5 14 43 - 3 39 46 - 9 22 10 .. .. .. 82 0 0 - 4 39 58 16 31 30 5 284 -59 - 5 27 35 - 3 52 33 - 9 35 16 .. .. .. 83 0 0 - 4 53 3 16 31 30 4 284 -60 - 5 40 43 - 4 5 36 - 9 48 38 .. .. .. 84 0 0 - 5 6 24 16 31 30 3 284 -61 - 5 54 7 - 4 18 54 -10 2 16 .. .. .. 85 0 0 - 5 20 1 16 31 31 2 284 -62 - 6 7 46 - 4 32 28 -10 16 10 .. .. .. 86 0 0 - 5 33 53 16 31 31 1 283 -63 - 6 21 41 - 4 46 18 .. .. .. .. .. .. Uncertainty in time = +/- 14 secs [Prediction of 2008 Mar 12.0] Data for the target star ------------------------ * name: TYC 0695-00588-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 46 07.6671 DE: +13 13 58.269 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .146, .191 ) * V mag [mag]: 11.9 * B mag [mag]: 13.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (444) Gyptis approx. diameter [km]: 163 approx. diameter ["]: .074 distance from Earth [AU]: 3.04600 * orbital information: orbit source: Preston date of fit: 2008 Mar 12 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 835 number of rejected observations: 133 time covered by the observations: 1900 Jul 25 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.009, 0.007, 88° remarks: * orbital elements for (444) Gyptis : Mean anomaly = 80.30210102 deg Arg. of pericenter = 155.27102798 deg Long. of node = 195.83086648 deg Inclination = 10.27739340 deg Eccentricity = 0.17315668 Semimajor axis = 2.77207668 AU Perihelion dist = 2.29207310 AU Mag: H = 7.89, G = 0.22 Epoch of elements : MJD 54552.68600000 TDT (2008 Mar 27.686) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 27 444 Gyptis 16h 28.1m UT 11.9 4 46 7.667 13 13 58.27TYC 0695-00588-1 13.2 13.3 163 5.4 3.046 3.278 10.23 -0.9767 13.230 -65.73 2.93 16.4690 0.06328 -0.30206 16.57765 3.54558 0.00521 0.00029 2000 79.7285102008 325.00000155.271028195.830866 10.2773930.17315668 2.7720767 2.2920731 7.8 5.00.22 RATE 2.1354840 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.191 0.146 360 3.56 0.189 0 54537.5020080327_0588-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 12, 23:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org