IOTA/IOTA-ES occultation update for (19685) 1999 RB197 / HIP 80672 event on 2008 Jul 08, 07:14 UT Visible from Peru Summary ------- On 2008 Jul 08 UT, the 11 km diameter asteroid (19685) 1999 RB197 will occult a 5.8 mag star in the constellation Scorpius for observers along a path across Peru. In the case of an occultation, the combined light of the asteroid and the star will drop by 11.3 mag to 17.1 mag (the magnitude of the asteroid) for at most 1.3 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: . The event at a glimpse ---------------------- * Rank: 3 * date and approx. time of event: 2008 Jul 08, 07:07 - 2008 Jul 08, 07:21 UT * midpoint of event [JD]: 2454655.80181667 * magnitude of target star: 5.8 * magnitude drop [mag]: 11.3 * estimated maximum duration [s]: 1.3 * Moon: 31 % sunlit, 77° distance * Sun: 142° distance * rough path description: Peru The occultation path -------------------- * approximate projected width [km]: 18 * 1 sigma uncertainty interval [path widths]: +/- 18.02 * 1 sigma uncertainty interval [seconds]: +/- 23.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .171 +/- .094) * 1 sigma uncertainty ellipse (major, minor, PA): ( .171", .093", 96° ) * approx speed of asteroid's shadow [km/s]: 8.6203 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 80672 by 19685 1999 RB197 on 2008 Jul 8 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 -130 4 32 51 0 0 7 21 55 0 196 -14 -129 56 6 -130 12 57 ... .. .. ... .. .. -130 29 7 50 0 0 7 21 55 1 195 -15 -130 20 55 -130 37 17 -125 9 38 ... .. .. -130 50 12 49 0 0 7 21 54 2 195 -16 -130 42 13 -130 58 10 -125 39 46 ... .. .. -131 8 5 48 0 0 7 21 53 3 195 -17 -131 0 18 -131 15 51 -126 5 49 ... .. .. -131 22 59 47 0 0 7 21 52 4 195 -18 -131 15 22 -131 30 35 -126 28 8 ... .. .. -131 35 7 46 0 0 7 21 50 5 195 -19 -131 27 40 -131 42 32 -126 46 59 ... .. .. -131 44 39 45 0 0 7 21 48 6 194 -20 -131 37 21 -131 51 56 -127 2 40 ... .. .. -131 51 45 44 0 0 7 21 45 7 194 -21 -131 44 35 -131 58 53 -127 15 21 ... .. .. -131 56 33 43 0 0 7 21 43 8 194 -21 -131 49 31 -132 3 34 -127 25 16 ... .. .. -131 59 10 42 0 0 7 21 39 9 194 -22 -131 52 15 -132 6 4 -127 32 33 ... .. .. -131 59 43 41 0 0 7 21 36 10 194 -23 -131 52 54 -132 6 31 -127 37 21 ... .. .. -131 58 18 40 0 0 7 21 32 11 194 -24 -131 51 35 -132 5 0 -127 39 48 ... .. .. -131 54 59 39 0 0 7 21 27 12 194 -25 -131 48 21 -132 1 36 -127 40 0 -135 52 14 -131 49 50 38 0 0 7 21 23 13 195 -26 -131 43 17 -131 56 22 -127 38 4 -135 44 17 -131 42 56 37 0 0 7 21 18 14 195 -27 -131 36 28 -131 49 24 -127 34 3 -135 34 50 -131 34 20 36 0 0 7 21 12 15 195 -28 -131 27 55 -131 40 44 -127 28 3 -135 23 55 -131 24 4 35 0 0 7 21 6 16 195 -29 -131 17 43 -131 30 24 -127 20 7 -135 11 33 -131 12 11 34 0 0 7 21 0 17 195 -30 -131 5 53 -131 18 28 -127 10 17 -134 57 47 -130 58 43 33 0 0 7 20 54 18 196 -31 -130 52 28 -131 4 57 -126 58 37 -134 42 39 -130 43 41 32 0 0 7 20 47 19 196 -32 -130 37 28 -130 49 53 -126 45 9 -134 26 9 -130 27 6 31 0 0 7 20 40 20 196 -33 -130 20 56 -130 33 16 -126 29 54 -134 8 18 -130 9 1 30 0 0 7 20 32 21 196 -34 -130 2 52 -130 15 9 -126 12 53 -133 49 8 -129 49 24 29 0 0 7 20 24 21 197 -35 -129 43 16 -129 55 30 -125 54 8 -133 28 38 -129 28 16 28 0 0 7 20 16 22 197 -36 -129 22 10 -129 34 22 -125 33 38 -133 6 49 -129 5 38 27 0 0 7 20 7 23 198 -37 -128 59 32 -129 11 43 -125 11 22 -132 43 40 -128 41 28 26 0 0 7 19 58 24 198 -38 -128 35 23 -128 47 33 -124 47 22 -132 19 11 -128 15 47 25 0 0 7 19 49 25 198 -39 -128 9 42 -128 21 51 -124 21 35 -131 53 22 -127 48 32 24 0 0 7 19 39 26 199 -40 -127 42 27 -127 54 37 -123 54 1 -131 26 11 -127 19 43 23 0 0 7 19 29 26 199 -41 -127 13 37 -127 25 48 -123 24 36 -130 57 38 -126 49 17 22 0 0 7 19 18 27 200 -42 -126 43 10 -126 55 23 -122 53 20 -130 27 41 -126 17 13 21 0 0 7 19 7 28 201 -43 -126 11 5 -126 23 21 -122 20 8 -129 56 18 -125 43 28 20 0 0 7 18 56 29 201 -44 -125 37 17 -125 49 37 -121 44 57 -129 23 27 -125 7 58 19 0 0 7 18 44 30 202 -46 -125 1 45 -125 14 10 -121 7 43 -128 49 7 -124 30 40 18 0 0 7 18 32 30 203 -47 -124 24 25 -124 36 55 -120 28 20 -128 13 13 -123 51 30 17 0 0 7 18 19 31 203 -48 -123 45 12 -123 57 48 -119 46 43 -127 35 43 -123 10 23 16 0 0 7 18 6 32 204 -49 -123 4 1 -123 16 45 -119 2 45 -126 56 33 -122 27 13 15 0 0 7 17 52 32 205 -50 -122 20 47 -122 33 39 -118 16 17 -126 15 39 -121 41 54 14 0 0 7 17 38 33 206 -51 -121 35 22 -121 48 25 -117 27 9 -125 32 56 -120 54 18 13 0 0 7 17 24 33 206 -52 -120 47 41 -121 0 55 -116 35 11 -124 48 19 -120 4 17 12 0 0 7 17 9 34 207 -54 -119 57 33 -120 11 0 -115 40 8 -124 1 42 -119 11 40 11 0 0 7 16 53 35 208 -55 -119 4 48 -119 18 30 -114 41 44 -123 12 57 -118 16 15 10 0 0 7 16 37 35 209 -56 -118 9 15 -118 23 14 -113 39 39 -122 21 57 -117 17 49 9 0 0 7 16 21 35 210 -57 -117 10 39 -117 24 58 -112 33 30 -121 28 32 -116 16 5 8 0 0 7 16 3 36 211 -58 -116 8 43 -116 23 25 -111 22 47 -120 32 32 -115 10 43 7 0 0 7 15 45 36 213 -60 -115 3 8 -115 18 16 -110 6 51 -119 33 44 -114 1 18 6 0 0 7 15 27 36 214 -61 -113 53 28 -114 9 7 -108 44 54 -118 31 52 -112 47 22 5 0 0 7 15 7 36 215 -62 -112 39 14 -112 55 28 -107 15 50 -117 26 41 -111 28 16 4 0 0 7 14 47 37 216 -63 -111 19 46 -111 36 43 -105 38 9 -116 17 48 -110 3 11 3 0 0 7 14 25 37 218 -64 -109 54 16 -110 12 3 -103 49 40 -115 4 49 -108 31 5 2 0 0 7 14 3 36 219 -66 -108 21 37 -108 40 28 -101 46 56 -113 47 13 -106 50 28 1 0 0 7 13 39 36 220 -67 -106 40 21 -107 0 31 - 99 24 6 -112 24 19 -104 59 16 0 0 0 7 13 13 36 222 -67 -104 48 16 -105 10 10 - 96 29 2 -110 55 18 -102 54 15 - 1 0 0 7 12 46 35 223 -68 -102 42 2 -103 6 20 - 92 26 42 -109 19 4 Latitude Latitude Latitude Latitude -102 0 0 - 1 23 42 7 12 34 35 224 -68 - 1 18 17 - 1 29 6 2 6 0 - 4 36 15 -101 0 0 - 1 48 18 7 12 21 35 225 -69 - 1 42 57 - 1 53 39 1 39 9 - 4 59 7 -100 0 0 - 2 11 17 7 12 9 34 225 -69 - 2 5 58 - 2 16 35 1 14 7 - 5 20 30 - 99 0 0 - 2 32 40 7 11 56 34 226 -69 - 2 27 24 - 2 37 55 0 50 53 - 5 40 26 - 98 0 0 - 2 52 29 7 11 44 33 226 -69 - 2 47 15 - 2 57 42 0 29 22 - 5 58 55 - 97 0 0 - 3 10 45 7 11 33 33 227 -69 - 3 5 34 - 3 15 56 0 9 34 - 6 15 59 - 96 0 0 - 3 27 31 7 11 21 32 227 -68 - 3 22 22 - 3 32 40 - 0 8 34 - 6 31 40 - 95 0 0 - 3 42 48 7 11 10 32 228 -68 - 3 37 41 - 3 47 55 - 0 25 5 - 6 45 58 - 94 0 0 - 3 56 37 7 10 59 31 228 -68 - 3 51 31 - 4 1 43 - 0 39 59 - 6 58 55 - 93 0 0 - 4 8 59 7 10 48 31 229 -68 - 4 3 54 - 4 14 3 - 0 53 17 - 7 10 32 - 92 0 0 - 4 19 55 7 10 37 30 229 -67 - 4 14 52 - 4 24 58 - 1 5 2 - 7 20 49 - 91 0 0 - 4 29 26 7 10 27 29 229 -67 - 4 24 23 - 4 34 28 - 1 15 14 - 7 29 46 - 90 0 0 - 4 37 32 7 10 17 29 230 -66 - 4 32 31 - 4 42 34 - 1 23 54 - 7 37 26 - 89 0 0 - 4 44 15 7 10 7 28 230 -66 - 4 39 14 - 4 49 16 - 1 31 2 - 7 43 47 - 88 0 0 - 4 49 34 7 9 57 27 230 -65 - 4 44 33 - 4 54 34 - 1 36 40 - 7 48 50 - 87 0 0 - 4 53 29 7 9 48 27 230 -64 - 4 48 29 - 4 58 29 - 1 40 47 - 7 52 36 - 86 0 0 - 4 56 1 7 9 38 26 231 -64 - 4 51 1 - 5 1 1 - 1 43 23 - 7 55 5 - 85 0 0 - 4 57 10 7 9 29 25 231 -63 - 4 52 10 - 5 2 10 - 1 44 29 - 7 56 16 - 84 0 0 - 4 56 56 7 9 21 25 231 -62 - 4 51 55 - 5 1 56 - 1 44 5 - 7 56 9 - 83 0 0 - 4 55 18 7 9 12 24 231 -62 - 4 50 17 - 5 0 18 - 1 42 9 - 7 54 45 - 82 0 0 - 4 52 16 7 9 4 23 231 -61 - 4 47 14 - 4 57 17 - 1 38 42 - 7 52 3 - 81 0 0 - 4 47 49 7 8 56 22 232 -60 - 4 42 46 - 4 52 51 - 1 33 43 - 7 48 1 - 80 0 0 - 4 41 57 7 8 48 21 232 -59 - 4 36 53 - 4 47 0 - 1 27 10 - 7 42 41 - 79 0 0 - 4 34 38 7 8 41 21 232 -58 - 4 29 34 - 4 39 42 - 1 19 4 - 7 36 1 - 78 0 0 - 4 25 53 7 8 33 20 232 -58 - 4 20 47 - 4 30 58 - 1 9 21 - 7 28 0 - 77 0 0 - 4 15 39 7 8 26 19 232 -57 - 4 10 32 - 4 20 46 - 0 58 3 - 7 18 38 - 76 0 0 - 4 3 56 7 8 19 18 232 -56 - 3 58 46 - 4 9 4 - 0 45 5 - 7 7 52 - 75 0 0 - 3 50 41 7 8 13 17 232 -55 - 3 45 30 - 3 55 52 - 0 30 27 - 6 55 43 - 74 0 0 - 3 35 54 7 8 7 16 232 -54 - 3 30 40 - 3 41 6 - 0 14 6 - 6 42 9 - 73 0 0 - 3 19 31 7 8 1 15 232 -53 - 3 14 15 - 3 24 47 0 4 0 - 6 27 7 - 72 0 0 - 3 1 32 7 7 55 14 232 -52 - 2 56 14 - 3 6 50 0 23 53 - 6 10 37 - 71 0 0 - 2 41 54 7 7 50 13 232 -51 - 2 36 32 - 2 47 15 0 45 38 - 5 52 37 - 70 0 0 - 2 20 34 7 7 45 12 232 -50 - 2 15 9 - 2 25 58 1 9 18 - 5 33 4 - 69 0 0 - 1 57 29 7 7 40 11 232 -49 - 1 52 1 - 2 2 57 1 34 55 - 5 11 57 - 68 0 0 - 1 32 37 7 7 36 10 232 -48 - 1 27 4 - 1 38 8 2 2 36 .. .. .. - 67 0 0 - 1 5 52 7 7 32 9 232 -47 - 1 0 16 - 1 11 28 2 32 23 .. .. .. - 66 0 0 - 0 37 13 7 7 29 8 232 -46 - 0 31 32 - 0 42 54 3 4 24 .. .. .. - 65 0 0 - 0 6 34 7 7 25 7 232 -45 - 0 0 48 - 0 12 20 3 38 44 .. .. .. - 64 0 0 0 26 9 7 7 23 6 233 -44 0 32 1 0 20 18 4 15 30 .. .. .. - 63 0 0 1 1 2 7 7 20 5 233 -42 1 7 0 0 55 5 4 54 50 .. .. .. - 62 0 0 1 38 11 7 7 18 4 233 -41 1 44 16 1 32 7 5 36 52 .. .. .. - 61 0 0 2 17 42 7 7 17 2 233 -40 2 23 54 2 11 31 .. .. .. .. .. .. - 60 0 0 2 59 43 7 7 16 1 233 -39 3 6 3 2 53 24 .. .. .. .. .. .. Uncertainty in time = +/- 30 secs [Prediction of 2008 Jun 4.0] Data for the target star ------------------------ * name: HIP 80672 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 28 14.4789 DE: -37 10 47.804 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .012, .012 ) * V mag [mag]: 5.8 * B mag [mag]: 6.9 * Apparent position with proper motion RA(deg): 247.2114057586 DE(deg): -37.2021527684 * Equation of equinoxes (radians) : 0.000051584132760 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (19685) 1999 RB197 approx. diameter [km]: 11 approx. diameter ["]: .007 distance from Earth [AU]: 2.07100 * orbital information: orbit source: Preston date of fit: 2008 Jun 04 source of used astrometry: MPC (via Astdys) number of used observations: 527 number of rejected observations: 4 time covered by the observations: 1971 Feb 18 - 2007 Mar 26 1 sigma uncertainty ellipse (major, minor, PA): 0.171, 0.092, 96° remarks: * orbital elements for (19685) 1999 RB197 : Mean anomaly = 77.08171926 deg Arg. of pericenter = 214.39899279 deg Long. of node = 322.44872519 deg Inclination = 12.31799894 deg Eccentricity = 0.07397677 Semimajor axis = 2.97438691 AU Perihelion dist = 2.75435139 AU Mag: H = 12.60, G = 0.15 Epoch of elements : MJD 54655.30100000 TDT (2008 Jul 08.301) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 8 19685 1999 RB197 7h 14.6m UT 5.8 16 28 14.479-37 10 47.80HIP 80672 6.9 17.1 11 1.3 2.071 -1.137 15.54 -148.2112 -37.184 72.63 22.42 7.2436 0.60402 0.52917 -3.20574 3.66016 0.00340 0.00066 2000 76.0632082008 7 3.00000214.398993322.448725 12.3179990.07397677 2.9743869 2.754351412.4 5.00.15 RATE 1.9213560 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.171 0.093 96 19.02 0.132 0 54621.5020080708__80672 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jun 06, 21:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org