IOTA/IOTA-ES occultation update for (664) Judith / TYC 0270-00918-1 event on 2009 Apr 11, 23:55 UT Visible from Summary ------- On 2009 Apr 11 UT, the 73 km diameter asteroid (664) Judith will occult a 9.8 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 14.7 mag (the magnitude of the asteroid) for at most 7.6 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: 72 * date and approx. time of event: 2009 Apr 11, 23:44 - 2009 Apr 12, 00:03 UT * magnitude of target star: 9.8 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 7.6 * Moon: 94 % sunlit, 62° distance * Sun: 147° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 76 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 6.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .036", 100° ) * approx speed of asteroid's shadow [km/s]: 9.5515 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0270-00918-1 by 664 Judith on 2009 Apr 11 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 ' " Longitude Longitude Longitude Longitude 55 34 59 -20 0 0 23 44 5 6 278 -39 57 50 33 53 35 43 ... .. .. 50 47 23 50 22 5 -19 0 0 23 44 14 11 280 -44 52 1 54 48 49 6 55 1 1 46 31 26 Latitude Latitude Latitude Latitude 49 0 0 -18 41 28 23 44 17 12 280 -45 -18 20 20 -19 2 32 -17 46 28 -19 36 12 48 0 0 -18 27 10 23 44 20 13 281 -46 -18 6 0 -18 48 18 -17 32 3 -19 22 2 47 0 0 -18 12 15 23 44 23 14 281 -47 -17 51 1 -18 33 26 -17 16 59 -19 7 15 46 0 0 -17 56 42 23 44 26 15 281 -48 -17 35 25 -18 17 56 -17 1 18 -18 51 51 45 0 0 -17 40 31 23 44 29 16 281 -49 -17 19 11 -18 1 49 -16 44 58 -18 35 49 44 0 0 -17 23 43 23 44 32 17 282 -50 -17 2 20 -17 45 5 -16 28 1 -18 19 10 43 0 0 -17 6 17 23 44 36 18 282 -51 -16 44 50 -17 27 42 -16 10 25 -18 1 54 42 0 0 -16 48 14 23 44 40 19 282 -52 -16 26 42 -17 9 42 -15 52 12 -17 44 0 41 0 0 -16 29 32 23 44 44 20 282 -53 -16 7 57 -16 51 5 -15 33 20 -17 25 28 40 0 0 -16 10 12 23 44 48 21 283 -54 -15 48 33 -16 31 49 -15 13 50 -17 6 19 39 0 0 -15 50 15 23 44 52 22 283 -55 -15 28 32 -16 11 56 -14 53 42 -16 46 32 38 0 0 -15 29 39 23 44 57 23 283 -56 -15 7 52 -15 51 24 -14 32 56 -16 26 7 37 0 0 -15 8 26 23 45 2 24 283 -57 -14 46 35 -15 30 15 -14 11 31 -16 5 5 36 0 0 -14 46 35 23 45 7 25 284 -58 -14 24 39 -15 8 28 -13 49 28 -15 43 25 35 0 0 -14 24 6 23 45 13 26 284 -59 -14 2 5 -14 46 4 -13 26 48 -15 21 7 34 0 0 -14 0 59 23 45 18 27 284 -60 -13 38 54 -14 23 1 -13 3 29 -14 58 12 33 0 0 -13 37 14 23 45 24 28 284 -61 -13 15 4 -13 59 21 -12 39 31 -14 34 39 32 0 0 -13 12 51 23 45 30 29 284 -62 -12 50 37 -13 35 3 -12 14 56 -14 10 28 31 0 0 -12 47 50 23 45 36 30 284 -63 -12 25 31 -13 10 7 -11 49 43 -13 45 40 30 0 0 -12 22 12 23 45 43 31 284 -64 -11 59 48 -12 44 34 -11 23 52 -13 20 15 29 0 0 -11 55 57 23 45 49 32 284 -65 -11 33 28 -12 18 23 -10 57 24 -12 54 12 28 0 0 -11 29 4 23 45 56 33 285 -66 -11 6 30 -11 51 35 -10 30 18 -12 27 32 27 0 0 -11 1 33 23 46 3 34 285 -67 -10 38 54 -11 24 10 -10 2 34 -12 0 14 26 0 0 -10 33 26 23 46 11 35 285 -68 -10 10 42 -10 56 7 - 9 34 14 -11 32 20 25 0 0 -10 4 42 23 46 18 36 285 -69 - 9 41 53 -10 27 28 - 9 5 16 -11 3 50 24 0 0 - 9 35 21 23 46 26 38 285 -70 - 9 12 27 - 9 58 13 - 8 35 42 -10 34 42 23 0 0 - 9 5 24 23 46 34 39 285 -71 - 8 42 24 - 9 28 21 - 8 5 31 -10 4 59 22 0 0 - 8 34 51 23 46 42 40 285 -72 - 8 11 46 - 8 57 53 - 7 34 44 - 9 34 39 21 0 0 - 8 3 42 23 46 51 41 284 -73 - 7 40 32 - 8 26 50 - 7 3 21 - 9 3 44 20 0 0 - 7 31 58 23 46 59 42 284 -74 - 7 8 42 - 7 55 11 - 6 31 23 - 8 32 14 19 0 0 - 6 59 39 23 47 8 43 284 -74 - 6 36 18 - 7 22 57 - 5 58 50 - 8 0 8 18 0 0 - 6 26 45 23 47 17 44 284 -75 - 6 3 19 - 6 50 9 - 5 25 42 - 7 27 29 17 0 0 - 5 53 17 23 47 27 45 284 -76 - 5 29 46 - 6 16 46 - 4 52 0 - 6 54 15 16 0 0 - 5 19 16 23 47 36 46 284 -77 - 4 55 39 - 5 42 50 - 4 17 45 - 6 20 27 15 0 0 - 4 44 42 23 47 46 47 283 -78 - 4 20 59 - 5 8 21 - 3 42 56 - 5 46 6 14 0 0 - 4 9 35 23 47 56 48 283 -78 - 3 45 47 - 4 33 19 - 3 7 35 - 5 11 13 13 0 0 - 3 33 56 23 48 6 49 283 -79 - 3 10 2 - 3 57 46 - 2 31 43 - 4 35 48 12 0 0 - 2 57 46 23 48 17 50 282 -80 - 2 33 47 - 3 21 41 - 1 55 18 - 3 59 52 11 0 0 - 2 21 5 23 48 27 51 282 -80 - 1 57 1 - 2 45 6 - 1 18 24 - 3 23 24 10 0 0 - 1 43 54 23 48 38 52 281 -80 - 1 19 45 - 2 8 0 - 0 41 0 - 2 46 27 9 0 0 - 1 6 15 23 48 49 53 281 -80 - 0 42 1 - 1 30 26 - 0 3 7 - 2 9 1 8 0 0 - 0 28 7 23 49 0 54 280 -80 - 0 3 48 - 0 52 23 0 35 15 - 1 31 7 7 0 0 0 10 28 23 49 12 56 280 -80 0 34 53 - 0 13 53 1 14 3 - 0 52 45 6 0 0 0 49 30 23 49 23 57 279 -80 1 13 59 0 25 3 1 53 18 - 0 13 56 5 0 0 1 28 57 23 49 35 58 278 -80 1 53 31 1 4 25 2 32 58 0 25 19 4 0 0 2 8 48 23 49 47 59 277 -79 2 33 28 1 44 12 3 13 2 1 4 58 3 0 0 2 49 3 23 49 59 60 276 -79 3 13 47 2 24 23 3 53 30 1 45 1 2 0 0 3 29 41 23 50 11 61 275 -78 3 54 30 3 4 56 4 34 19 2 25 26 1 0 0 4 10 40 23 50 24 62 274 -77 4 35 33 3 45 50 5 15 30 3 6 13 0 0 0 4 51 59 23 50 36 63 273 -76 5 16 57 4 27 5 5 57 1 3 47 21 - 1 0 0 5 33 37 23 50 49 64 271 -75 5 58 39 5 8 38 6 38 50 4 28 48 - 2 0 0 6 15 33 23 51 1 65 270 -74 6 40 39 5 50 30 7 20 57 5 10 33 - 3 0 0 6 57 45 23 51 14 65 268 -74 7 22 55 6 32 38 8 3 20 5 52 35 - 4 0 0 7 40 13 23 51 27 66 266 -73 8 5 27 7 15 2 8 45 58 6 34 53 - 5 0 0 8 22 54 23 51 40 67 265 -72 8 48 12 7 57 40 9 28 49 7 17 25 - 6 0 0 9 5 48 23 51 53 68 262 -70 9 31 10 8 40 30 10 11 53 8 0 9 - 7 0 0 9 48 53 23 52 7 69 260 -69 10 14 18 9 23 32 10 55 7 8 43 6 - 8 0 0 10 32 8 23 52 20 70 258 -68 10 57 37 10 6 44 11 38 31 9 26 13 - 9 0 0 11 15 32 23 52 33 70 255 -67 11 41 3 10 50 4 12 22 2 10 9 28 - 10 0 0 11 59 2 23 52 47 71 252 -66 12 24 36 11 33 32 13 5 40 10 52 51 - 11 0 0 12 42 38 23 53 0 72 249 -65 13 8 15 12 17 5 13 49 23 11 36 20 - 12 0 0 13 26 17 23 53 14 72 245 -64 13 51 57 13 0 42 14 33 9 12 19 53 - 13 0 0 14 10 0 23 53 27 73 242 -63 14 35 42 13 44 22 15 16 58 13 3 30 - 14 0 0 14 53 43 23 53 41 73 238 -62 15 19 27 14 28 3 16 0 46 13 47 8 - 15 0 0 15 37 26 23 53 54 74 234 -61 16 3 12 15 11 44 16 44 34 14 30 45 - 16 0 0 16 21 6 23 54 8 74 230 -60 16 46 54 15 55 23 17 28 19 15 14 22 - 17 0 0 17 4 44 23 54 21 74 226 -58 17 30 33 16 38 59 18 12 0 15 57 56 - 18 0 0 17 48 16 23 54 35 74 221 -57 18 14 6 17 22 30 18 55 36 16 41 25 - 19 0 0 18 31 42 23 54 48 74 217 -56 18 57 33 18 5 55 19 39 4 17 24 49 - 20 0 0 19 15 0 23 55 1 74 213 -55 19 40 52 18 49 12 20 22 24 18 8 5 - 21 0 0 19 58 9 23 55 15 74 209 -54 20 24 1 19 32 21 21 5 34 18 51 12 - 22 0 0 20 41 7 23 55 28 74 204 -53 21 6 59 20 15 18 21 48 33 19 34 9 - 23 0 0 21 23 52 23 55 41 73 200 -52 21 49 45 20 58 4 22 31 19 20 16 55 - 24 0 0 22 6 25 23 55 54 73 197 -51 22 32 17 21 40 36 23 13 51 20 59 28 - 25 0 0 22 48 42 23 56 7 72 193 -49 23 14 34 22 22 54 23 56 7 21 41 46 - 26 0 0 23 30 43 23 56 20 72 189 -48 23 56 34 23 4 56 24 38 6 22 23 49 - 27 0 0 24 12 26 23 56 33 71 186 -47 24 38 17 23 46 40 25 19 47 23 5 35 - 28 0 0 24 53 51 23 56 45 71 183 -46 25 19 40 24 28 6 26 1 8 23 47 2 - 29 0 0 25 34 55 23 56 58 70 180 -45 26 0 43 25 9 12 26 42 9 24 28 11 - 30 0 0 26 15 39 23 57 10 69 178 -44 26 41 25 25 49 57 27 22 49 25 8 58 - 31 0 0 26 56 0 23 57 22 69 175 -43 27 21 44 26 30 20 28 3 5 25 49 24 - 32 0 0 27 35 58 23 57 34 68 173 -42 28 1 40 27 10 20 28 42 57 26 29 27 - 33 0 0 28 15 31 23 57 46 67 170 -41 28 41 11 27 49 55 29 22 24 27 9 7 - 34 0 0 28 54 39 23 57 58 66 168 -40 29 20 16 28 29 6 30 1 26 27 48 21 - 35 0 0 29 33 21 23 58 10 65 166 -39 29 58 55 29 7 50 30 40 0 28 27 10 - 36 0 0 30 11 35 23 58 21 65 164 -38 30 37 7 29 46 7 31 18 7 29 5 32 - 37 0 0 30 49 21 23 58 33 64 163 -37 31 14 50 30 23 57 31 55 44 29 43 26 - 38 0 0 31 26 39 23 58 44 63 161 -36 31 52 4 31 1 17 32 32 53 30 20 52 - 39 0 0 32 3 26 23 58 55 62 159 -35 32 28 48 31 38 9 33 9 32 30 57 49 - 40 0 0 32 39 44 23 59 5 61 158 -34 33 5 2 32 14 30 33 45 39 31 34 16 - 41 0 0 33 15 30 23 59 16 60 157 -33 33 40 44 32 50 21 34 21 16 32 10 13 - 42 0 0 33 50 46 23 59 26 60 155 -32 34 15 55 33 25 40 34 56 20 32 45 39 - 43 0 0 34 25 29 23 59 37 59 154 -31 34 50 34 34 0 27 35 30 52 33 20 33 - 44 0 0 34 59 39 23 59 47 58 153 -30 35 24 41 34 34 42 36 4 51 33 54 55 - 45 0 0 35 33 17 23 59 56 57 151 -29 35 58 14 35 8 24 36 38 17 34 28 44 - 46 0 0 36 6 21 24 0 6 56 150 -28 36 31 13 35 41 33 37 11 9 35 2 0 - 47 0 0 36 38 52 24 0 15 55 149 -27 37 3 39 36 14 9 37 43 27 35 34 43 - 48 0 0 37 10 49 24 0 25 54 148 -26 37 35 31 36 46 11 38 15 11 36 6 53 - 49 0 0 37 42 12 24 0 34 54 147 -25 38 6 49 37 17 38 38 46 21 36 38 29 - 50 0 0 38 13 0 24 0 43 53 146 -24 38 37 32 37 48 32 39 16 55 37 9 30 - 51 0 0 38 43 14 24 0 51 52 145 -23 39 7 41 38 18 51 39 46 56 37 39 57 - 52 0 0 39 12 53 24 1 0 51 144 -22 39 37 15 38 48 35 40 16 21 38 9 50 - 53 0 0 39 41 58 24 1 8 50 143 -21 40 6 14 39 17 45 40 45 11 38 39 8 - 54 0 0 40 10 27 24 1 16 49 142 -20 40 34 38 39 46 20 41 13 27 39 7 52 - 55 0 0 40 38 22 24 1 24 49 141 -20 41 2 27 40 14 21 41 41 7 39 36 1 - 56 0 0 41 5 42 24 1 32 48 140 -19 41 29 42 40 41 46 42 8 13 40 3 35 - 57 0 0 41 32 28 24 1 40 47 139 -18 41 56 22 41 8 37 42 34 44 40 30 35 - 58 0 0 41 58 39 24 1 47 46 138 -17 42 22 27 41 34 54 43 0 40 40 57 0 - 59 0 0 42 24 15 24 1 54 45 137 -16 42 47 58 42 0 35 43 26 1 41 22 51 - 60 0 0 42 49 17 24 2 1 45 136 -15 43 12 54 42 25 43 43 50 48 41 48 8 - 61 0 0 43 13 44 24 2 8 44 135 -15 43 37 16 42 50 16 44 15 1 42 12 50 - 62 0 0 43 37 38 24 2 15 43 134 -14 44 1 4 43 14 15 44 38 40 42 36 58 - 63 0 0 44 0 58 24 2 22 42 134 -13 44 24 18 43 37 41 45 1 45 43 0 32 - 64 0 0 44 23 44 24 2 28 41 133 -12 44 46 58 44 0 32 45 24 16 43 23 33 - 65 0 0 44 45 56 24 2 34 41 132 -11 45 9 5 44 22 51 45 46 14 43 46 0 - 66 0 0 45 7 36 24 2 40 40 131 -11 45 30 39 44 44 36 46 7 39 44 7 53 - 67 0 0 45 28 42 24 2 46 39 130 -10 45 51 40 45 5 48 46 28 31 44 29 14 - 68 0 0 45 49 16 24 2 52 38 129 -9 46 12 9 45 26 27 46 48 51 44 50 2 - 69 0 0 46 9 18 24 2 58 38 129 -8 46 32 5 45 46 34 47 8 38 45 10 17 - 70 0 0 46 28 47 24 3 3 37 128 -8 46 51 29 46 6 8 47 27 53 45 30 1 - 71 0 0 46 47 45 24 3 9 36 127 -7 47 10 21 46 25 11 47 46 37 45 49 12 - 72 0 0 47 6 11 24 3 14 35 126 -6 47 28 41 46 43 42 48 4 49 46 7 51 - 73 0 0 47 24 5 24 3 19 35 125 -5 47 46 31 47 1 42 48 22 30 46 25 59 - 74 0 0 47 41 29 24 3 24 34 124 -5 48 3 50 47 19 11 48 39 40 46 43 36 - 75 0 0 47 58 22 24 3 29 33 124 -4 48 20 38 47 36 10 48 56 21 47 0 42 - 76 0 0 48 14 45 24 3 33 33 123 -3 48 36 56 47 52 37 49 12 30 47 17 18 - 77 0 0 48 30 38 24 3 38 32 122 -2 48 52 44 48 8 35 49 28 11 47 33 23 - 78 0 0 48 46 1 24 3 42 31 121 -2 49 8 2 48 24 3 49 43 21 47 48 59 - 79 0 0 49 0 55 24 3 47 31 120 -1 49 22 51 48 39 1 49 58 3 48 4 5 - 80 0 0 49 15 20 24 3 51 30 120 0 49 37 11 48 53 31 50 12 16 48 18 41 Uncertainty in time = +/- 7 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0270-00918-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 11 21 28.5579 DE: +05 37 54.880 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .031 ) * V mag [mag]: 9.8 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (664) Judith approx. diameter [km]: 73 approx. diameter ["]: .046 distance from Earth [AU]: 2.17500 * orbital information: orbit source: Preston date of fit: 2008 Apr 24 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 850 number of rejected observations: 65 time covered by the observations: 1908 Jun 24 - 2008 Feb 11 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.019, 103° remarks: * orbital elements for (664) Judith : Mean anomaly = 294.05895947 deg Arg. of pericenter = 97.39370340 deg Long. of node = 172.82244059 deg Inclination = 8.59749360 deg Eccentricity = 0.21899378 Semimajor axis = 3.20729339 AU Perihelion dist = 2.50491608 AU Mag: H = 9.92, G = 0.15 Epoch of elements : MJD 54932.99700000 TDT (2009 Apr 11.997) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 11 664 Judith 23h 54.7m UT 9.8 11 21 28.558 5 37 54.88TYC 0270-00918-1 11.2 14.7 73 7.6 2.175 -1.170 13.01 -28.6370 5.629 -178.46 8.65 23.9120 0.16281 0.21903 -4.32406 3.21978 0.00284 -0.00133 2000 293.5446992009 4 9.00000 97.393703172.822441 8.5974940.21899378 3.2072934 2.504916110.0 5.00.15 RATE 1.7159160 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.036 100 1.80 0.037 0 54581.5020090411_0918-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 06:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org