IOTA/IOTA-ES occultation update for (55) Pandora / HIP 107590 event on 2009 Nov 09, 00:12 UT Visible from Summary ------- On 2009 Nov 09 UT, the 67 km diameter asteroid (55) Pandora will occult a 7.8 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.7 mag to 12.4 mag (the magnitude of the asteroid) for at most 4.4 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: 98 * date and approx. time of event: 2009 Nov 09, 00:12 - 2009 Nov 09, 00:19 UT * magnitude of target star: 7.8 * magnitude drop [mag]: 4.7 * estimated maximum duration [s]: 4.4 * Moon: 58 % sunlit, 164° distance * Sun: 97° distance * rough path description: Additional comments ------------------- HIP/Tycho2 pm issue The occultation path -------------------- * approximate projected width [km]: 68 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .015) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .014", 76° ) * approx speed of asteroid's shadow [km/s]: 15.3254 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 107590 by 55 Pandora on 2009 Nov 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 ' " Longitude Longitude Longitude Longitude - 12 23 33 39 0 0 0 19 52 2 247 -68 - 11 22 24 - 13 23 24 - 10 38 46 - 14 4 35 - 15 18 47 38 0 0 0 19 51 4 245 -68 - 14 22 2 - 16 14 33 - 13 41 39 - 16 53 0 Latitude Latitude Latitude Latitude - 17 0 0 37 23 2 0 19 50 6 244 -68 37 2 51 37 43 15 36 48 43 37 57 24 - 18 0 0 37 0 19 0 19 50 6 244 -68 36 40 2 37 20 36 36 25 51 37 34 49 - 19 0 0 36 36 59 0 19 49 7 243 -68 36 16 37 36 57 21 36 2 23 37 11 37 - 20 0 0 36 13 1 0 19 48 8 242 -68 35 52 35 36 33 29 35 38 17 36 47 49 - 21 0 0 35 48 27 0 19 47 9 242 -68 35 27 56 36 9 0 35 13 34 36 23 23 - 22 0 0 35 23 15 0 19 46 10 241 -68 35 2 39 35 43 53 34 48 14 35 58 20 - 23 0 0 34 57 25 0 19 45 11 241 -68 34 36 44 35 18 8 34 22 15 35 32 39 - 24 0 0 34 30 58 0 19 43 12 240 -68 34 10 11 34 51 46 33 55 39 35 6 20 - 25 0 0 34 3 52 0 19 42 13 239 -68 33 43 0 34 24 45 33 28 24 34 39 23 - 26 0 0 33 36 8 0 19 40 14 239 -67 33 15 10 33 57 6 33 0 31 34 11 48 - 27 0 0 33 7 45 0 19 38 15 238 -67 32 46 42 33 28 49 32 31 59 33 43 34 - 28 0 0 32 38 43 0 19 37 16 238 -67 32 17 35 32 59 52 32 2 49 33 14 42 - 29 0 0 32 9 3 0 19 35 17 237 -66 31 47 50 32 30 17 31 32 59 32 45 10 - 30 0 0 31 38 44 0 19 32 18 237 -66 31 17 25 32 0 4 31 2 31 32 15 0 - 31 0 0 31 7 46 0 19 30 19 236 -65 30 46 22 31 29 11 30 31 24 31 44 11 - 32 0 0 30 36 9 0 19 28 20 236 -65 30 14 40 30 57 39 29 59 38 31 12 43 - 33 0 0 30 3 53 0 19 25 21 235 -64 29 42 19 30 25 29 29 27 14 30 40 37 - 34 0 0 29 30 59 0 19 22 22 235 -64 29 9 19 29 52 40 28 54 10 30 7 51 - 35 0 0 28 57 26 0 19 19 23 234 -63 28 35 41 29 19 12 28 20 28 29 34 27 - 36 0 0 28 23 14 0 19 16 24 234 -62 28 1 24 28 45 6 27 46 8 29 0 24 - 37 0 0 27 48 25 0 19 13 25 233 -62 27 26 30 28 10 21 27 11 10 28 25 43 - 38 0 0 27 12 57 0 19 10 26 233 -61 26 50 57 27 34 59 26 35 34 27 50 25 - 39 0 0 26 36 52 0 19 6 27 232 -60 26 14 47 26 58 59 25 59 21 27 14 28 - 40 0 0 26 0 11 0 19 3 28 232 -60 25 38 1 26 22 22 25 22 30 26 37 54 - 41 0 0 25 22 52 0 18 59 29 231 -59 25 0 37 25 45 8 24 45 4 26 0 44 - 42 0 0 24 44 57 0 18 55 30 231 -58 24 22 38 25 7 18 24 7 1 25 22 57 - 43 0 0 24 6 27 0 18 50 32 230 -57 23 44 3 24 28 53 23 28 24 24 44 35 - 44 0 0 23 27 23 0 18 46 33 230 -56 23 4 54 23 49 52 22 49 11 24 5 38 - 45 0 0 22 47 44 0 18 41 34 229 -55 22 25 11 23 10 18 22 9 25 23 26 7 - 46 0 0 22 7 32 0 18 37 35 229 -54 21 44 56 22 30 10 21 29 7 22 46 2 - 47 0 0 21 26 48 0 18 32 36 228 -54 21 4 8 21 49 30 20 48 16 22 5 25 - 48 0 0 20 45 33 0 18 26 37 228 -53 20 22 49 21 8 19 20 6 54 21 24 16 - 49 0 0 20 3 48 0 18 21 38 227 -52 19 41 0 20 26 37 19 25 3 20 42 37 - 50 0 0 19 21 34 0 18 16 40 227 -51 18 58 42 19 44 26 18 42 43 20 0 28 - 51 0 0 18 38 51 0 18 10 41 226 -50 18 15 57 19 1 48 17 59 56 19 17 52 - 52 0 0 17 55 43 0 18 4 42 226 -49 17 32 45 18 18 42 17 16 42 18 34 48 - 53 0 0 17 12 9 0 17 58 43 225 -48 16 49 9 17 35 11 16 33 4 17 51 19 - 54 0 0 16 28 12 0 17 52 44 225 -46 16 5 9 16 51 16 15 49 2 17 7 26 - 55 0 0 15 43 52 0 17 45 46 224 -45 15 20 47 16 6 59 15 4 39 16 23 11 - 56 0 0 14 59 12 0 17 39 47 224 -44 14 36 5 15 22 21 14 19 55 15 38 34 - 57 0 0 14 14 13 0 17 32 48 224 -43 13 51 4 14 37 24 13 34 53 14 53 38 - 58 0 0 13 28 57 0 17 25 49 223 -42 13 5 47 13 52 9 12 49 34 14 8 25 - 59 0 0 12 43 25 0 17 18 51 223 -41 12 20 14 13 6 39 12 4 0 13 22 55 - 60 0 0 11 57 40 0 17 11 52 222 -40 11 34 27 12 20 54 11 18 13 12 37 12 - 61 0 0 11 11 43 0 17 4 53 221 -39 10 48 29 11 34 58 10 32 15 11 51 16 - 62 0 0 10 25 36 0 16 56 54 221 -38 10 2 22 10 48 51 9 46 7 11 5 9 - 63 0 0 9 39 21 0 16 48 56 220 -36 9 16 7 10 2 37 8 59 52 10 18 55 - 64 0 0 8 53 0 0 16 41 57 220 -35 8 29 46 9 16 16 8 13 31 9 32 33 - 65 0 0 8 6 35 0 16 33 58 219 -34 7 43 21 8 29 50 7 27 7 8 46 8 - 66 0 0 7 20 8 0 16 25 59 219 -33 6 56 55 7 43 23 6 40 41 7 59 40 - 67 0 0 6 33 41 0 16 17 61 218 -32 6 10 29 6 56 55 5 54 16 7 13 11 - 68 0 0 5 47 16 0 16 8 62 217 -30 5 24 5 6 10 28 5 7 53 6 26 44 - 69 0 0 5 0 55 0 16 0 63 216 -29 4 37 46 5 24 6 4 21 35 5 40 21 - 70 0 0 4 14 41 0 15 52 64 215 -28 3 51 33 4 37 50 3 35 23 4 54 3 - 71 0 0 3 28 34 0 15 43 65 214 -27 3 5 29 3 51 41 2 49 20 4 7 53 - 72 0 0 2 42 37 0 15 34 67 213 -26 2 19 34 3 5 42 2 3 27 3 21 52 - 73 0 0 1 56 53 0 15 26 68 212 -24 1 33 52 2 19 55 1 17 47 2 36 3 - 74 0 0 1 11 22 0 15 17 69 211 -23 0 48 24 1 34 21 0 32 21 1 50 28 - 75 0 0 0 26 7 0 15 8 70 210 -22 0 3 12 0 49 3 - 0 12 49 1 5 7 - 76 0 0 - 0 18 50 0 14 59 71 208 -21 - 0 41 42 0 4 2 - 0 57 41 0 20 4 - 77 0 0 - 1 3 29 0 14 50 72 206 -20 - 1 26 16 - 0 40 39 - 1 42 13 - 0 24 40 - 78 0 0 - 1 47 46 0 14 41 74 204 -18 - 2 10 30 - 1 25 0 - 2 26 24 - 1 9 3 - 79 0 0 - 2 31 40 0 14 33 75 202 -17 - 2 54 20 - 2 8 58 - 3 10 11 - 1 53 4 - 80 0 0 - 3 15 10 0 14 24 76 199 -16 - 3 37 46 - 2 52 32 - 3 53 34 - 2 36 41 - 81 0 0 - 3 58 14 0 14 15 77 196 -15 - 4 20 46 - 3 35 41 - 4 36 31 - 3 19 53 - 82 0 0 - 4 40 51 0 14 6 78 193 -13 - 5 3 19 - 4 18 22 - 5 19 1 - 4 2 37 - 83 0 0 - 5 23 0 0 13 57 78 189 -12 - 5 45 22 - 5 0 35 - 6 1 1 - 4 44 53 - 84 0 0 - 6 4 38 0 13 48 79 184 -11 - 6 26 56 - 5 42 19 - 6 42 32 - 5 26 40 - 85 0 0 - 6 45 45 0 13 39 80 178 -10 - 7 7 58 - 6 23 31 - 7 23 31 - 6 7 56 - 86 0 0 - 7 26 20 0 13 30 81 172 -9 - 7 48 28 - 7 4 11 - 8 3 57 - 6 48 39 - 87 0 0 - 8 6 22 0 13 21 81 165 -7 - 8 28 25 - 7 44 17 - 8 43 50 - 7 28 49 - 88 0 0 - 8 45 49 0 13 12 81 158 -6 - 9 7 46 - 8 23 50 - 9 23 8 - 8 8 25 - 89 0 0 - 9 24 40 0 13 3 81 150 -5 - 9 46 33 - 9 2 46 -10 1 51 - 8 47 26 - 90 0 0 -10 2 56 0 12 55 81 142 -4 -10 24 43 - 9 41 7 -10 39 57 - 9 25 50 - 91 0 0 -10 40 34 0 12 46 81 135 -3 -11 2 16 -10 18 51 -11 17 26 -10 3 38 - 92 0 0 -11 17 35 0 12 37 81 128 -2 -11 39 11 -10 55 57 -11 54 17 -10 40 48 - 93 0 0 -11 53 57 0 12 29 80 121 0 -12 15 28 -11 32 25 -12 30 30 -11 17 20 Uncertainty in time = +/- 3 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 107590 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 47 28.7685 DE: -16 45 44.874 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .018, .010 ) * V mag [mag]: 7.8 * B mag [mag]: 8.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (55) Pandora approx. diameter [km]: 67 approx. diameter ["]: .045 distance from Earth [AU]: 2.06500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1173 number of rejected observations: 98 time covered by the observations: 1913 Oct 24 - 2008 Feb 10 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.010, 64° remarks: * orbital elements for (55) Pandora : Mean anomaly = 340.17931419 deg Arg. of pericenter = 3.63223832 deg Long. of node = 10.45238010 deg Inclination = 7.18719388 deg Eccentricity = 0.14404720 Semimajor axis = 2.76048133 AU Perihelion dist = 2.36284171 AU Mag: H = 7.67, G = 0.15 Epoch of elements : MJD 55144.00900000 TDT (2009 Nov 09.009) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 9 55 Pandora 0h 13.0m UT 7.8 21 47 28.769-16 45 44.87HIP 107590 8.9 12.4 67 4.4 2.065 2.152 20.04 -84.6939 -16.768 172.70 -16.84 0.2169 -0.08155 0.12395 7.25752 4.70661 0.00532 0.00193 2000 339.317799200911 5.00000 3.632238 10.452380 7.1871940.14404720 2.7604813 2.3628417 7.8 5.00.15 RATE 2.1489530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.027 0.014 76 1.35 0.016 0 54786.5020091109_107590 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 18:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org