IOTA/IOTA-ES occultation update for (238) Hypatia / TYC 0737-01129-1 event on 2009 Oct 09, 07:33 UT Visible from Summary ------- On 2009 Oct 09 UT, the 149 km diameter asteroid (238) Hypatia will occult a 9.1 mag star in the constellation Monoceros for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 13.3 mag (the magnitude of the asteroid) for at most 10.4 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: 90 * date and approx. time of event: 2009 Oct 09, 07:25 - 2009 Oct 09, 07:34 UT * magnitude of target star: 9.1 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 10.4 * Moon: 72 % sunlit, 26° distance * Sun: 97° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 150 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .043 +/- .044) * 1 sigma uncertainty ellipse (major, minor, PA): ( .044", .043", 0° ) * approx speed of asteroid's shadow [km/s]: 14.2381 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0737-01129-1 by 238 Hypatia on 2009 Oct 9 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 -125 0 0 24 47 5 7 25 38 0 79 -69 24 5 52 25 28 17 .. .. .. 26 11 4 -124 0 0 24 57 9 7 25 38 1 80 -69 24 15 59 25 38 16 23 33 7 26 21 0 -123 0 0 25 6 43 7 25 38 2 80 -70 24 25 36 25 47 46 23 42 48 26 30 25 -122 0 0 25 15 46 7 25 38 3 81 -70 24 34 43 25 56 46 23 51 59 26 39 21 -121 0 0 25 24 19 7 25 39 4 81 -70 24 43 19 26 5 15 24 0 39 26 47 47 -120 0 0 25 32 21 7 25 39 5 81 -70 24 51 25 26 13 14 24 8 48 26 55 43 -119 0 0 25 39 53 7 25 40 6 82 -70 24 59 1 26 20 44 24 16 26 27 3 9 -118 0 0 25 46 56 7 25 41 7 82 -70 25 6 6 26 27 43 24 23 34 27 10 6 -117 0 0 25 53 28 7 25 41 7 83 -70 25 12 40 26 34 12 24 30 12 27 16 32 -116 0 0 25 59 29 7 25 42 8 83 -70 25 18 44 26 40 12 24 36 18 27 22 29 -115 0 0 26 5 1 7 25 44 9 84 -70 25 24 18 26 45 41 24 41 54 27 27 56 -114 0 0 26 10 2 7 25 45 10 84 -70 25 29 22 26 50 40 24 47 0 27 32 53 -113 0 0 26 14 34 7 25 46 11 84 -70 25 33 55 26 55 10 24 51 35 27 37 21 -112 0 0 26 18 35 7 25 47 12 85 -70 25 37 57 26 59 9 24 55 39 27 41 19 -111 0 0 26 22 6 7 25 49 13 85 -70 25 41 30 27 2 39 24 59 13 27 44 47 -110 0 0 26 25 6 7 25 51 14 86 -69 25 44 32 27 5 38 25 2 17 27 47 45 -109 0 0 26 27 37 7 25 52 15 86 -69 25 47 3 27 8 8 25 4 49 27 50 13 -108 0 0 26 29 37 7 25 54 16 87 -69 25 49 5 27 10 8 25 6 51 27 52 12 -107 0 0 26 31 8 7 25 56 17 87 -69 25 50 36 27 11 37 25 8 23 27 53 41 -106 0 0 26 32 8 7 25 58 17 88 -68 25 51 36 27 12 37 25 9 23 27 54 40 -105 0 0 26 32 37 7 26 0 18 88 -68 25 52 6 27 13 6 25 9 53 27 55 10 -104 0 0 26 32 37 7 26 3 19 88 -67 25 52 5 27 13 6 25 9 53 27 55 9 -103 0 0 26 32 6 7 26 5 20 89 -67 25 51 34 27 12 35 25 9 21 27 54 39 -102 0 0 26 31 5 7 26 8 21 89 -67 25 50 32 27 11 34 25 8 19 27 53 39 -101 0 0 26 29 33 7 26 10 22 90 -66 25 49 0 27 10 3 25 6 46 27 52 8 -100 0 0 26 27 31 7 26 13 23 90 -66 25 46 56 27 8 2 25 4 42 27 50 8 - 99 0 0 26 24 58 7 26 16 24 91 -65 25 44 23 27 5 30 25 2 6 27 47 38 - 98 0 0 26 21 54 7 26 19 25 91 -64 25 41 18 27 2 28 24 59 0 27 44 37 - 97 0 0 26 18 20 7 26 22 26 91 -64 25 37 42 26 58 56 24 55 23 27 41 6 - 96 0 0 26 14 15 7 26 25 26 92 -63 25 33 35 26 54 53 24 51 14 27 37 5 - 95 0 0 26 9 40 7 26 28 27 92 -63 25 28 58 26 50 19 24 46 34 27 32 33 - 94 0 0 26 4 33 7 26 31 28 93 -62 25 23 49 26 45 15 24 41 23 27 27 31 - 93 0 0 25 58 55 7 26 35 29 93 -61 25 18 9 26 39 39 24 35 40 27 21 58 - 92 0 0 25 52 47 7 26 39 30 94 -61 25 11 57 26 33 33 24 29 26 27 15 55 - 91 0 0 25 46 7 7 26 42 31 94 -60 25 5 14 26 26 56 24 22 40 27 9 21 - 90 0 0 25 38 55 7 26 46 32 94 -59 24 58 0 26 19 48 24 15 22 27 2 16 - 89 0 0 25 31 12 7 26 50 33 95 -59 24 50 14 26 12 8 24 7 33 26 54 40 - 88 0 0 25 22 58 7 26 54 34 95 -58 24 41 56 26 3 58 23 59 11 26 46 33 - 87 0 0 25 14 12 7 26 58 35 96 -57 24 33 6 25 55 15 23 50 17 26 37 54 - 86 0 0 25 4 54 7 27 2 36 96 -57 24 23 44 25 46 2 23 40 52 26 28 45 - 85 0 0 24 55 5 7 27 7 37 96 -56 24 13 50 25 36 16 23 30 53 26 19 3 - 84 0 0 24 44 43 7 27 11 38 97 -55 24 3 24 25 25 59 23 20 23 26 8 51 - 83 0 0 24 33 49 7 27 16 39 97 -54 23 52 26 25 15 10 23 9 19 25 58 6 - 82 0 0 24 22 23 7 27 20 39 97 -54 23 40 55 25 3 48 22 57 43 25 46 50 - 81 0 0 24 10 25 7 27 25 40 98 -53 23 28 52 24 51 55 22 45 35 25 35 2 - 80 0 0 23 57 54 7 27 30 41 98 -52 23 16 15 24 39 29 22 32 53 25 22 41 - 79 0 0 23 44 50 7 27 35 42 99 -51 23 3 6 24 26 31 22 19 39 25 9 49 - 78 0 0 23 31 14 7 27 40 43 99 -50 22 49 25 24 13 0 22 5 51 24 56 24 - 77 0 0 23 17 5 7 27 45 44 99 -50 22 35 10 23 58 57 21 51 30 24 42 26 - 76 0 0 23 2 23 7 27 51 45 99 -49 22 20 21 23 44 21 21 36 35 24 27 56 - 75 0 0 22 47 7 7 27 56 46 100 -48 22 5 0 23 29 12 21 21 7 24 12 54 - 74 0 0 22 31 19 7 28 2 47 100 -47 21 49 5 23 13 30 21 5 6 23 57 18 - 73 0 0 22 14 57 7 28 8 48 100 -46 21 32 37 22 57 14 20 48 31 23 41 10 - 72 0 0 21 58 2 7 28 13 49 101 -45 21 15 35 22 40 26 20 31 22 23 24 28 - 71 0 0 21 40 34 7 28 19 50 101 -45 20 57 59 22 23 4 20 13 39 23 7 14 - 70 0 0 21 22 31 7 28 25 51 101 -44 20 39 50 22 5 9 19 55 23 22 49 26 - 69 0 0 21 3 55 7 28 32 52 101 -43 20 21 7 21 46 40 19 36 32 22 31 4 - 68 0 0 20 44 46 7 28 38 53 102 -42 20 1 50 21 27 38 19 17 7 22 12 10 - 67 0 0 20 25 3 7 28 44 54 102 -41 19 41 59 21 8 2 18 57 9 21 52 42 - 66 0 0 20 4 45 7 28 51 55 102 -40 19 21 35 20 47 53 18 36 36 21 32 40 - 65 0 0 19 43 55 7 28 58 56 102 -39 19 0 36 20 27 10 18 15 29 21 12 5 - 64 0 0 19 22 30 7 29 4 57 102 -38 18 39 3 20 5 53 17 53 48 20 50 56 - 63 0 0 19 0 31 7 29 11 58 102 -37 18 16 57 19 44 2 17 31 33 20 29 14 - 62 0 0 18 37 59 7 29 18 59 102 -37 17 54 16 19 21 38 17 8 44 20 6 58 - 61 0 0 18 14 53 7 29 25 60 102 -36 17 31 2 18 58 40 16 45 22 19 44 9 - 60 0 0 17 51 13 7 29 33 61 102 -35 17 7 14 18 35 9 16 21 25 19 20 46 - 59 0 0 17 27 0 7 29 40 62 102 -34 16 42 52 18 11 4 15 56 54 18 56 49 - 58 0 0 17 2 13 7 29 47 63 102 -33 16 17 57 17 46 25 15 31 50 18 32 20 - 57 0 0 16 36 53 7 29 55 64 102 -32 15 52 29 17 21 14 15 6 13 18 7 17 - 56 0 0 16 11 0 7 30 3 66 102 -31 15 26 27 16 55 29 14 40 2 17 41 41 - 55 0 0 15 44 34 7 30 10 67 102 -30 14 59 52 16 29 11 14 13 18 17 15 32 - 54 0 0 15 17 35 7 30 18 68 101 -29 14 32 45 16 2 21 13 46 2 16 48 51 - 53 0 0 14 50 3 7 30 26 69 101 -28 14 5 5 15 34 58 13 18 13 16 21 37 - 52 0 0 14 22 0 7 30 34 70 101 -27 13 36 52 15 7 3 12 49 52 15 53 51 - 51 0 0 13 53 25 7 30 43 71 100 -26 13 8 8 14 38 37 12 20 59 15 25 33 - 50 0 0 13 24 18 7 30 51 72 99 -25 12 38 53 14 9 38 11 51 35 14 56 44 - 49 0 0 12 54 40 7 30 59 73 99 -24 12 9 7 13 40 9 11 21 39 14 27 23 - 48 0 0 12 24 31 7 31 8 74 98 -23 11 38 50 13 10 9 10 51 13 13 57 32 - 47 0 0 11 53 53 7 31 16 75 97 -22 11 8 2 12 39 39 10 20 17 13 27 10 - 46 0 0 11 22 44 7 31 25 76 95 -21 10 36 46 12 8 38 9 48 52 12 56 19 - 45 0 0 10 51 7 7 31 34 77 93 -20 10 5 0 11 37 9 9 16 58 12 24 58 - 44 0 0 10 19 1 7 31 43 78 91 -19 9 32 46 11 5 11 8 44 35 11 53 9 - 43 0 0 9 46 27 7 31 51 79 89 -18 9 0 4 10 32 46 8 11 45 11 20 51 - 42 0 0 9 13 26 7 32 0 80 86 -17 8 26 56 9 59 52 7 38 28 10 48 6 - 41 0 0 8 39 59 7 32 9 81 82 -16 7 53 21 9 26 33 7 4 46 10 14 55 - 40 0 0 8 6 6 7 32 18 82 77 -14 7 19 20 8 52 47 6 30 37 9 41 17 - 39 0 0 7 31 48 7 32 28 83 70 -13 6 44 55 8 18 37 5 56 5 9 7 14 - 38 0 0 6 57 7 7 32 37 84 62 -12 6 10 7 7 44 2 5 21 9 8 32 47 - 37 0 0 6 22 2 7 32 46 84 53 -11 5 34 55 7 9 5 4 45 50 7 57 56 - 36 0 0 5 46 36 7 32 55 85 41 -10 4 59 22 6 33 45 4 10 10 7 22 43 - 35 0 0 5 10 48 7 33 5 85 28 -9 4 23 28 5 58 3 3 34 10 6 47 8 - 34 0 0 4 34 40 7 33 14 85 15 -8 3 47 15 5 22 2 2 57 50 6 11 13 - 33 0 0 3 58 14 7 33 23 84 4 -7 3 10 42 4 45 41 2 21 12 5 34 58 - 32 0 0 3 21 29 7 33 33 84 355 -6 2 33 53 4 9 2 1 44 16 4 58 25 - 31 0 0 2 44 29 7 33 42 83 347 -5 1 56 47 3 32 6 1 7 5 4 21 35 - 30 0 0 2 7 12 7 33 52 82 341 -4 1 19 26 2 54 55 0 29 39 3 44 28 - 29 0 0 1 29 42 7 34 1 81 336 -2 0 41 51 2 17 29 - 0 8 1 3 7 7 - 28 0 0 0 51 59 7 34 10 80 332 -1 0 4 3 1 39 50 - 0 45 52 2 29 32 - 27 0 0 0 14 4 7 34 20 79 329 0 - 0 33 56 1 1 59 - 1 23 55 1 51 45 Uncertainty in time = +/- 5 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0737-01129-1 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 34 44.9267 DE: +09 45 43.422 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .039, .043 ) * V mag [mag]: 9.1 * B mag [mag]: 9.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (238) Hypatia approx. diameter [km]: 149 approx. diameter ["]: .085 distance from Earth [AU]: 2.40900 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 703 number of rejected observations: 127 time covered by the observations: 1904 Sep 11 - 2007 Oct 09 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.010, 92° remarks: * orbital elements for (238) Hypatia : Mean anomaly = 37.93309550 deg Arg. of pericenter = 208.75864384 deg Long. of node = 183.97994475 deg Inclination = 12.39200515 deg Eccentricity = 0.08641809 Semimajor axis = 2.90716864 AU Perihelion dist = 2.65593667 AU Mag: H = 7.89, G = 0.15 Epoch of elements : MJD 55113.31500000 TDT (2009 Oct 09.315) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 9 238 Hypatia 7h 33.1m UT 9.1 6 34 44.927 9 45 43.42TYC 0737-01129-1 9.9 13.3 149 10.4 2.409 1.714 -14.77 -32.6369 9.766 63.56 -6.35 7.5511 -0.04482 -0.07941 6.94316 -4.04671 -0.00566 0.00051 2000 37.273948200910 6.00000208.758644183.979945 12.3920050.08641809 2.9071686 2.6559367 8.2 5.00.15 RATE 1.9883770 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.044 0.043 0 1.52 0.044 0 54545.5020091009_1129-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 14:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org