IOTA/IOTA-ES occultation update for (1337) Gerarda / TYC 5193-01144-1 event on 2008 May 14, 15:04 UT Visible from Australia Summary ------- On 2008 May 14 UT, the 39 km diameter asteroid (1337) Gerarda will occult a 9.6 mag star in the constellation Aquarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.7 mag to 16.3 mag (the magnitude of the asteroid) for at most 2.6 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: 50 * date and approx. time of event: 2008 May 14, 14:57 - 2008 May 14, 15:04 UT * midpoint of event [JD]: 2454601.12814167 * magnitude of target star: 9.6 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 2.6 * Moon: 75 % sunlit, 144° distance * Sun: 95° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 1.29 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .035 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .035", .027", 91° ) * approx speed of asteroid's shadow [km/s]: 14.7036 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5193-01144-1 by 1337 Gerarda on 2008 May 14 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 130 0 0 -26 41 53 14 57 19 0 92 -81 -26 52 29 -26 31 18 -27 19 49 -26 4 0 131 0 0 -26 43 22 14 57 19 1 91 -81 -26 53 57 -26 32 47 -27 21 17 -26 5 29 132 0 0 -26 44 29 14 57 19 2 91 -82 -26 55 4 -26 33 54 -27 22 23 -26 6 36 133 0 0 -26 45 13 14 57 19 3 90 -82 -26 55 48 -26 34 38 -27 23 8 -26 7 20 134 0 0 -26 45 36 14 57 20 4 90 -82 -26 56 11 -26 35 1 -27 23 30 -26 7 43 135 0 0 -26 45 36 14 57 20 5 89 -82 -26 56 11 -26 35 1 -27 23 30 -26 7 44 136 0 0 -26 45 14 14 57 21 6 89 -82 -26 55 49 -26 34 39 -27 23 9 -26 7 22 137 0 0 -26 44 30 14 57 22 7 89 -82 -26 55 6 -26 33 55 -27 22 25 -26 6 38 138 0 0 -26 43 24 14 57 23 8 88 -81 -26 54 0 -26 32 49 -27 21 19 -26 5 31 139 0 0 -26 41 56 14 57 24 9 88 -81 -26 52 31 -26 31 21 -27 19 51 -26 4 2 140 0 0 -26 40 5 14 57 25 9 87 -81 -26 50 41 -26 29 30 -27 18 1 -26 2 11 141 0 0 -26 37 53 14 57 26 10 87 -80 -26 48 28 -26 27 17 -27 15 49 -25 59 58 142 0 0 -26 35 17 14 57 27 11 86 -80 -26 45 53 -26 24 42 -27 13 14 -25 57 22 143 0 0 -26 32 20 14 57 28 12 86 -79 -26 42 56 -26 21 44 -27 10 18 -25 54 24 144 0 0 -26 29 0 14 57 30 13 85 -78 -26 39 36 -26 18 24 -27 6 59 -25 51 3 145 0 0 -26 25 18 14 57 32 14 85 -78 -26 35 54 -26 14 41 -27 3 17 -25 47 19 146 0 0 -26 21 13 14 57 33 15 85 -77 -26 31 50 -26 10 36 -26 59 14 -25 43 13 147 0 0 -26 16 46 14 57 35 16 84 -76 -26 27 23 -26 6 9 -26 54 48 -25 38 45 148 0 0 -26 11 56 14 57 37 17 84 -76 -26 22 34 -26 1 18 -26 50 0 -25 33 54 149 0 0 -26 6 44 14 57 39 18 83 -75 -26 17 22 -25 56 6 -26 44 49 -25 28 40 150 0 0 -26 1 9 14 57 41 19 83 -74 -26 11 48 -25 50 31 -26 39 16 -25 23 4 151 0 0 -25 55 12 14 57 43 19 82 -73 -26 5 51 -25 44 33 -26 33 20 -25 17 5 152 0 0 -25 48 52 14 57 46 20 82 -72 -25 59 32 -25 38 13 -26 27 2 -25 10 43 153 0 0 -25 42 10 14 57 48 21 81 -72 -25 52 50 -25 31 30 -26 20 22 -25 3 59 154 0 0 -25 35 5 14 57 51 22 81 -71 -25 45 45 -25 24 24 -26 13 19 -24 56 52 155 0 0 -25 27 37 14 57 54 23 81 -70 -25 38 18 -25 16 56 -26 5 53 -24 49 22 156 0 0 -25 19 47 14 57 56 24 80 -69 -25 30 29 -25 9 5 -25 58 5 -24 41 30 157 0 0 -25 11 34 14 57 59 25 80 -68 -25 22 16 -25 0 51 -25 49 55 -24 33 15 158 0 0 -25 2 58 14 58 2 26 79 -67 -25 13 41 -24 52 15 -25 41 21 -24 24 36 159 0 0 -24 54 0 14 58 5 27 79 -67 -25 4 44 -24 43 16 -25 32 26 -24 15 36 160 0 0 -24 44 39 14 58 9 28 78 -66 -24 55 24 -24 33 54 -25 23 7 -24 6 12 161 0 0 -24 34 55 14 58 12 29 78 -65 -24 45 41 -24 24 10 -25 13 26 -23 56 26 162 0 0 -24 24 49 14 58 15 30 77 -64 -24 35 35 -24 14 3 -25 3 23 -23 46 17 163 0 0 -24 14 20 14 58 19 31 77 -63 -24 25 7 -24 3 33 -24 52 56 -23 35 45 164 0 0 -24 3 28 14 58 23 31 77 -62 -24 14 16 -23 52 41 -24 42 8 -23 24 50 165 0 0 -23 52 14 14 58 27 32 76 -61 -24 3 3 -23 41 25 -24 30 56 -23 13 33 166 0 0 -23 40 37 14 58 30 33 76 -60 -23 51 26 -23 29 48 -24 19 23 -23 1 53 167 0 0 -23 28 38 14 58 34 34 75 -59 -23 39 28 -23 17 47 -24 7 26 -22 49 50 168 0 0 -23 16 16 14 58 39 35 75 -58 -23 27 7 -23 5 24 -23 55 7 -22 37 25 169 0 0 -23 3 31 14 58 43 36 74 -57 -23 14 23 -22 52 39 -23 42 26 -22 24 37 170 0 0 -22 50 24 14 58 47 37 74 -57 -23 1 17 -22 39 31 -23 29 23 -22 11 27 171 0 0 -22 36 54 14 58 52 38 74 -56 -22 47 49 -22 26 1 -23 15 57 -21 57 54 172 0 0 -22 23 3 14 58 56 39 73 -55 -22 33 58 -22 12 8 -23 2 8 -21 43 59 173 0 0 -22 8 49 14 59 1 40 73 -54 -22 19 45 -21 57 53 -22 47 58 -21 29 41 174 0 0 -21 54 12 14 59 6 41 72 -53 -22 5 9 -21 43 16 -22 33 25 -21 15 1 175 0 0 -21 39 14 14 59 11 42 72 -52 -21 50 12 -21 28 16 -22 18 30 -20 59 59 176 0 0 -21 23 54 14 59 16 43 71 -51 -21 34 53 -21 12 55 -22 3 14 -20 44 35 177 0 0 -21 8 11 14 59 21 44 71 -50 -21 19 11 -20 57 11 -21 47 35 -20 28 49 178 0 0 -20 52 7 14 59 26 45 71 -49 -21 3 8 -20 41 6 -21 31 35 -20 12 41 179 0 0 -20 35 42 14 59 32 46 70 -48 -20 46 44 -20 24 40 -21 15 13 -19 56 12 180 0 0 -20 18 54 14 59 37 47 70 -47 -20 29 58 -20 7 51 -20 58 29 -19 39 21 -179 0 0 -20 1 46 14 59 43 48 69 -46 -20 12 50 -19 50 42 -20 41 25 -19 22 8 -178 0 0 -19 44 16 14 59 48 49 69 -45 -19 55 21 -19 33 11 -20 23 59 -19 4 35 -177 0 0 -19 26 25 14 59 54 50 68 -44 -19 37 32 -19 15 19 -20 6 12 -18 46 40 -176 0 0 -19 8 14 15 0 0 51 68 -43 -19 19 21 -18 57 6 -19 48 4 -18 28 25 -175 0 0 -18 49 41 15 0 6 52 68 -42 -19 0 50 -18 38 33 -19 29 36 -18 9 48 -174 0 0 -18 30 49 15 0 12 53 67 -41 -18 41 58 -18 19 39 -19 10 47 -17 50 52 -173 0 0 -18 11 36 15 0 19 54 67 -40 -18 22 46 -18 0 25 -18 51 38 -17 31 35 -172 0 0 -17 52 3 15 0 25 55 66 -39 -18 3 15 -17 40 51 -18 32 9 -17 11 59 -171 0 0 -17 32 10 15 0 31 56 66 -38 -17 43 23 -17 20 58 -18 12 20 -16 52 2 -170 0 0 -17 11 59 15 0 38 57 65 -37 -17 23 12 -17 0 45 -17 52 12 -16 31 47 -169 0 0 -16 51 28 15 0 45 58 65 -36 -17 2 43 -16 40 13 -17 31 45 -16 11 12 -168 0 0 -16 30 38 15 0 51 59 64 -35 -16 41 54 -16 19 22 -17 10 59 -15 50 18 -167 0 0 -16 9 30 15 0 58 60 64 -34 -16 20 47 -15 58 13 -16 49 54 -15 29 7 -166 0 0 -15 48 3 15 1 5 61 63 -33 -15 59 21 -15 36 45 -16 28 32 -15 7 37 -165 0 0 -15 26 19 15 1 12 62 63 -32 -15 37 38 -15 15 0 -16 6 51 -14 45 49 -164 0 0 -15 4 18 15 1 20 63 62 -31 -15 15 38 -14 52 58 -15 44 53 -14 23 44 -163 0 0 -14 41 59 15 1 27 64 62 -30 -14 53 21 -14 30 39 -15 22 38 -14 1 22 -162 0 0 -14 19 25 15 1 34 66 61 -28 -14 30 47 -14 8 3 -15 0 7 -13 38 44 -161 0 0 -13 56 33 15 1 41 67 61 -27 -14 7 56 -13 45 11 -14 37 19 -13 15 50 -160 0 0 -13 33 27 15 1 49 68 60 -26 -13 44 50 -13 22 3 -14 14 15 -12 52 40 -159 0 0 -13 10 5 15 1 57 69 59 -25 -13 21 29 -12 58 40 -13 50 57 -12 29 15 -158 0 0 -12 46 28 15 2 4 70 59 -24 -12 57 54 -12 35 3 -13 27 23 -12 5 35 -157 0 0 -12 22 37 15 2 12 71 58 -23 -12 34 3 -12 11 11 -13 3 35 -11 41 41 -156 0 0 -11 58 32 15 2 20 72 57 -22 -12 10 0 -11 47 5 -12 39 33 -11 17 34 -155 0 0 -11 34 15 15 2 28 73 56 -21 -11 45 42 -11 22 47 -12 15 18 -10 53 13 -154 0 0 -11 9 44 15 2 36 74 55 -20 -11 21 13 -10 58 16 -11 50 50 -10 28 40 -153 0 0 -10 45 2 15 2 44 75 54 -19 -10 56 31 -10 33 32 -11 26 10 -10 3 55 -152 0 0 -10 20 8 15 2 52 76 53 -18 -10 31 38 -10 8 38 -11 1 18 - 9 38 59 -151 0 0 - 9 55 3 15 3 0 77 51 -17 -10 6 33 - 9 43 32 -10 36 16 - 9 13 52 -150 0 0 - 9 29 48 15 3 8 78 50 -16 - 9 41 19 - 9 18 17 -10 11 3 - 8 48 34 -149 0 0 - 9 4 23 15 3 16 79 48 -14 - 9 15 55 - 8 52 51 - 9 45 40 - 8 23 8 -148 0 0 - 8 38 49 15 3 24 80 45 -13 - 8 50 21 - 8 27 17 - 9 20 8 - 7 57 32 -147 0 0 - 8 13 7 15 3 33 81 42 -12 - 8 24 40 - 8 1 35 - 8 54 28 - 7 31 49 -146 0 0 - 7 47 17 15 3 41 82 39 -11 - 7 58 50 - 7 35 44 - 8 28 39 - 7 5 57 -145 0 0 - 7 21 21 15 3 49 83 34 -10 - 7 32 54 - 7 9 47 - 8 2 44 - 6 39 59 -144 0 0 - 6 55 18 15 3 58 84 28 -9 - 7 6 51 - 6 43 44 - 7 36 42 - 6 13 55 -143 0 0 - 6 29 9 15 4 6 85 19 -8 - 6 40 43 - 6 17 35 - 7 10 35 - 5 47 45 -142 0 0 - 6 2 55 15 4 15 86 8 -7 - 6 14 30 - 5 51 21 - 6 44 22 - 5 21 31 -141 0 0 - 5 36 37 15 4 23 86 353 -6 - 5 48 12 - 5 25 3 - 6 18 5 - 4 55 12 -140 0 0 - 5 10 16 15 4 32 86 336 -4 - 5 21 51 - 4 58 42 - 5 51 44 - 4 28 50 -139 0 0 - 4 43 52 15 4 40 86 319 -3 - 4 55 27 - 4 32 18 - 5 25 20 - 4 2 26 -138 0 0 - 4 17 26 15 4 49 86 305 -2 - 4 29 1 - 4 5 51 - 4 58 55 - 3 36 0 -137 0 0 - 3 50 59 15 4 57 85 294 -1 - 4 2 34 - 3 39 24 - 4 32 27 - 3 9 32 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 9.0] Data for the target star ------------------------ * name: TYC 5193-01144-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 09 03.9672 DE: -01 48 18.551 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 9.6 * B mag [mag]: 10.6 * Apparent position with proper motion RA(deg): 317.3779131999 DE(deg): -1.7727000656 * Equation of equinoxes (radians) : 0.000040525338807 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1337) Gerarda approx. diameter [km]: 39 approx. diameter ["]: .022 distance from Earth [AU]: 2.48500 * orbital information: orbit source: Preston date of fit: 2008 Apr 08 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 894 number of rejected observations: 17 time covered by the observations: 1934 Sep 09 - 2007 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.029, 0.019, 91° remarks: * orbital elements for (1337) Gerarda : Mean anomaly = 306.42926254 deg Arg. of pericenter = 198.87959594 deg Long. of node = 160.38569644 deg Inclination = 17.98754263 deg Eccentricity = 0.10022598 Semimajor axis = 2.91203452 AU Perihelion dist = 2.62017301 AU Mag: H = 11.11, G = 0.15 Epoch of elements : MJD 54600.62800000 TDT (2008 May 14.628) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 14 1337 Gerarda 15h 4.5m UT 9.6 21 9 3.967- 1 48 18.55TYC 5193-01144-1 10.6 16.3 39 2.6 2.485 1.804 11.41 -141.5919 -1.808 -47.04 18.82 15.0754 0.02534 -0.05886 7.64698 3.22473 -0.00527 -0.00179 2000 306.3047062008 514.00000198.879596160.385696 17.9875430.10022598 2.9120345 2.620173011.1 5.00.15 RATE 1.9833950 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.035 0.027 91 2.29 0.028 0 54565.5020080514_1144-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 09, 17:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org