IOTA/IOTA-ES occultation update for (0) 2005 RO43 / UCAC2 31266276 event on 2008 Feb 03, 21:15 UT Visible from Africa, Europe Summary ------- On 2008 Feb 03 UT, the 120 km diameter asteroid (0) 2005 RO43 will occult a 12.6 mag star in the constellation Cetus for observers along a path across Africa, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.4 mag to 21.9 mag (the magnitude of the asteroid) for at most 14.7 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 0 * date and approx. time of event: 2008 Feb 03, 21:03 - 2008 Feb 03, 21:27 UT * magnitude of target star: 12.6 * magnitude drop [mag]: 9.4 * estimated maximum duration [s]: 14.7 * Moon: 11 % sunlit, 123° distance * Sun: 87° distance * rough path description: Africa, Europe The occultation path -------------------- * approximate projected width [km]: 126 * 1 sigma uncertainty interval [path widths]: +/- 103.19 * 1 sigma uncertainty interval [seconds]: +/- 1074.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .590 +/- .481) * 1 sigma uncertainty ellipse (major, minor, PA): ( .620", .442", 116° ) * approx speed of asteroid's shadow [km/s]: 8.1465 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 31266276 by 0 2005 RO43 on 2008 Feb 03 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 ... .. .. 52 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. 21 2 21 ... .. .. 51 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. 16 34 58 ... .. .. 50 0 0 .. .. .. .. .. .. ... .. .. 33 53 24 ... .. .. 13 0 11 29 5 56 49 0 0 21 27 48 6 262 -56 36 49 25 25 0 26 ... .. .. 9 58 14 22 44 6 48 0 0 21 27 39 10 257 -55 26 2 53 19 57 47 ... .. .. 7 19 22 Latitude Latitude Latitude Latitude 21 0 0 47 38 12 21 27 36 11 256 -55 47 2 15 48 14 0 43 9 20 51 59 32 20 0 0 47 24 30 21 27 34 12 255 -54 46 48 20 48 0 31 42 53 56 51 47 23 19 0 0 47 9 57 21 27 31 13 254 -54 46 33 33 47 46 12 42 37 34 51 34 28 18 0 0 46 54 31 21 27 29 14 254 -54 46 17 53 47 31 1 42 20 13 51 20 46 17 0 0 46 38 12 21 27 26 14 253 -54 46 1 17 47 14 57 42 1 51 51 6 17 16 0 0 46 20 57 21 27 24 15 252 -53 45 43 46 46 57 59 41 42 27 50 50 59 15 0 0 46 2 45 21 27 21 16 251 -53 45 25 16 46 40 4 41 21 58 50 34 50 14 0 0 45 43 35 21 27 18 17 251 -53 45 5 47 46 21 12 41 0 22 50 17 50 13 0 0 45 23 24 21 27 14 17 250 -52 44 45 17 46 1 21 40 37 38 49 59 56 12 0 0 45 2 10 21 27 11 18 249 -52 44 23 42 45 40 28 40 13 43 49 41 8 11 0 0 44 39 52 21 27 7 19 249 -52 44 1 2 45 18 31 39 48 33 49 21 22 10 0 0 44 16 27 21 27 3 20 248 -51 43 37 14 44 55 29 39 22 8 49 0 38 9 0 0 43 51 52 21 26 59 21 247 -51 43 12 15 44 31 18 38 54 23 48 38 52 8 0 0 43 26 6 21 26 55 22 247 -51 42 46 3 44 5 57 38 25 16 48 16 4 7 0 0 42 59 5 21 26 50 22 246 -50 42 18 35 43 39 23 37 54 44 47 52 10 6 0 0 42 30 47 21 26 45 23 245 -50 41 49 49 43 11 33 37 22 42 47 27 8 5 0 0 42 1 8 21 26 40 24 245 -50 41 19 40 42 42 23 36 49 8 47 0 56 4 0 0 41 30 5 21 26 34 25 244 -49 40 48 5 42 11 51 36 13 57 46 33 31 3 0 0 40 57 34 21 26 28 26 244 -49 40 15 1 41 39 53 35 37 4 46 4 49 2 0 0 40 23 32 21 26 22 27 243 -48 39 40 24 41 6 26 34 58 26 45 34 47 1 0 0 39 47 55 21 26 16 28 242 -48 39 4 10 40 31 24 34 17 57 45 3 23 0 0 0 39 10 38 21 26 9 29 242 -47 38 26 14 39 54 45 33 35 31 44 30 32 - 1 0 0 38 31 36 21 26 2 30 241 -47 37 46 31 39 16 24 32 51 4 43 56 10 - 2 0 0 37 50 45 21 25 54 31 241 -46 37 4 56 38 36 15 32 4 28 43 20 14 - 3 0 0 37 7 59 21 25 46 32 240 -45 36 21 24 37 54 14 31 15 38 42 42 39 - 4 0 0 36 23 12 21 25 37 33 240 -45 35 35 49 37 10 14 30 24 25 42 3 19 - 5 0 0 35 36 18 21 25 28 34 239 -44 34 48 5 36 24 10 29 30 42 41 22 11 - 6 0 0 34 47 11 21 25 19 35 239 -43 33 58 4 35 35 56 28 34 21 40 39 8 - 7 0 0 33 55 44 21 25 8 37 239 -43 33 5 39 34 45 24 27 35 13 39 54 5 - 8 0 0 33 1 48 21 24 57 38 238 -42 32 10 43 33 52 28 26 33 7 39 6 55 - 9 0 0 32 5 16 21 24 46 39 238 -41 31 13 6 32 56 58 25 27 53 38 17 32 - 10 0 0 31 5 58 21 24 34 40 238 -40 30 12 41 31 58 47 24 19 19 37 25 49 - 11 0 0 30 3 46 21 24 21 42 237 -40 29 9 16 30 57 46 23 7 14 36 31 37 - 12 0 0 28 58 29 21 24 7 43 237 -39 28 2 41 29 53 44 21 51 22 35 34 50 - 13 0 0 27 49 56 21 23 53 44 237 -38 26 52 46 28 46 30 20 31 30 34 35 17 - 14 0 0 26 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54 32 -37 56 29 -64 51 32 -24 15 47 - 42 0 0 -43 35 1 21 7 36 47 354 10 -46 8 45 -41 8 14 -68 35 36 -27 21 6 - 43 0 0 -46 39 13 21 7 4 44 356 12 -49 13 20 -44 12 6 -71 56 34 -30 22 41 - 44 0 0 -49 33 28 21 6 35 41 358 13 -52 7 3 -47 6 50 -74 51 8 -33 19 13 - 45 0 0 -52 16 55 21 6 9 39 359 14 -54 49 7 -49 51 32 -77 18 1 -36 9 32 - 46 0 0 -54 49 8 21 5 46 36 1 15 -57 19 11 -52 25 42 -79 18 15 -38 52 45 - 47 0 0 -57 10 1 21 5 26 34 2 16 -59 37 16 -54 49 6 -80 54 53 -41 28 11 - 48 0 0 -59 19 45 21 5 8 32 3 17 -61 43 40 -57 1 50 -82 11 50 -43 55 25 - 49 0 0 -61 18 44 21 4 53 30 5 17 -63 38 54 -59 4 13 -83 13 7 -46 14 15 - 50 0 0 -63 7 33 21 4 40 28 6 18 -65 23 40 -60 56 41 -84 2 13 -48 24 42 - 51 0 0 -64 46 51 21 4 29 26 7 18 -66 58 44 -62 39 50 -84 41 57 -50 26 52 - 52 0 0 -66 17 23 21 4 20 25 8 19 -68 24 56 -64 14 19 -85 14 28 -52 21 2 - 53 0 0 -67 39 52 21 4 11 23 9 19 -69 43 4 -65 40 46 -85 41 23 -54 7 32 - 54 0 0 -68 55 1 21 4 4 22 10 19 -70 53 54 -66 59 53 -86 3 56 -55 46 46 - 55 0 0 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.. .. - 96 0 0 -83 46 49 21 3 8 5 52 21 -84 29 12 -83 4 39 -89 5 22 .. .. .. - 97 0 0 -83 51 35 21 3 8 5 53 21 -84 33 26 -83 9 55 -89 6 6 .. .. .. - 98 0 0 -83 56 7 21 3 8 5 54 21 -84 37 29 -83 14 57 -89 6 48 .. .. .. - 99 0 0 -84 0 26 21 3 8 4 55 21 -84 41 20 -83 19 44 -89 7 27 .. .. .. -100 0 0 -84 4 34 21 3 7 4 56 21 -84 45 1 -83 24 18 -89 8 5 .. .. .. -101 0 0 -84 8 30 21 3 7 4 57 21 -84 48 31 -83 28 40 -89 8 41 .. .. .. -102 0 0 -84 12 15 21 3 7 4 58 21 -84 51 51 -83 32 49 -89 9 15 .. .. .. -103 0 0 -84 15 49 21 3 7 4 59 21 -84 55 2 -83 36 46 -89 9 48 .. .. .. -104 0 0 -84 19 13 21 3 7 4 60 21 -84 58 4 -83 40 33 -89 10 19 .. .. .. -105 0 0 -84 22 28 21 3 7 4 61 21 -85 0 57 -83 44 8 -89 10 48 .. .. .. -106 0 0 -84 25 33 21 3 7 4 62 21 -85 3 42 -83 47 33 -89 11 16 .. .. .. -107 0 0 -84 28 29 21 3 7 4 63 21 -85 6 18 -83 50 48 -89 11 43 .. .. .. -108 0 0 -84 31 16 21 3 7 3 64 21 -85 8 47 -83 53 53 -89 12 8 .. .. .. -109 0 0 -84 33 55 21 3 6 3 65 21 -85 11 8 -83 56 50 -89 12 32 .. .. .. -110 0 0 -84 36 25 21 3 6 3 66 21 -85 13 22 -83 59 37 -89 12 55 .. .. .. -111 0 0 -84 38 48 21 3 6 3 67 21 -85 15 29 -84 2 15 -89 13 17 .. .. .. -112 0 0 -84 41 3 21 3 6 3 68 21 -85 17 30 -84 4 45 -89 13 37 .. .. .. -113 0 0 -84 43 11 21 3 6 3 69 21 -85 19 23 -84 7 7 -89 13 56 .. .. .. -114 0 0 -84 45 12 21 3 6 3 70 21 -85 21 11 -84 9 20 -89 14 14 .. .. .. -115 0 0 -84 47 5 21 3 6 3 71 21 -85 22 52 -84 11 26 -89 14 31 .. .. .. -116 0 0 -84 48 52 21 3 6 3 72 21 -85 24 27 -84 13 25 -89 14 48 .. .. .. -117 0 0 -84 50 32 21 3 6 3 73 21 -85 25 56 -84 15 16 -89 15 3 .. .. .. -118 0 0 -84 52 6 21 3 6 2 74 21 -85 27 19 -84 17 0 -89 15 17 .. .. .. -119 0 0 -84 53 34 21 3 6 2 75 21 -85 28 37 -84 18 37 -89 15 30 .. .. .. -120 0 0 -84 54 55 21 3 6 2 76 21 -85 29 50 -84 20 7 -89 15 42 .. .. .. -121 0 0 -84 56 10 21 3 6 2 77 21 -85 30 56 -84 21 31 -89 15 53 .. .. .. -122 0 0 -84 57 19 21 3 6 2 78 21 -85 31 58 -84 22 48 -89 16 4 .. .. .. -123 0 0 -84 58 23 21 3 6 2 79 21 -85 32 55 -84 23 58 -89 16 13 .. .. .. -124 0 0 -84 59 21 21 3 6 2 80 21 -85 33 46 -84 25 2 -89 16 22 .. .. .. -125 0 0 -85 0 13 21 3 5 2 81 21 -85 34 32 -84 26 0 -89 16 30 .. .. .. -126 0 0 -85 0 59 21 3 5 2 82 21 -85 35 14 -84 26 52 -89 16 37 .. .. .. -127 0 0 -85 1 40 21 3 5 2 82 21 -85 35 50 -84 27 37 -89 16 43 .. .. .. -128 0 0 -85 2 16 21 3 5 2 83 21 -85 36 22 -84 28 17 -89 16 49 .. .. .. -129 0 0 -85 2 46 21 3 5 1 84 21 -85 36 49 -84 28 50 -89 16 53 .. .. .. -130 0 0 -85 3 11 21 3 5 1 85 21 -85 37 11 -84 29 18 -89 16 57 .. .. .. -131 0 0 -85 3 31 21 3 5 1 86 21 -85 37 29 -84 29 40 -89 17 0 .. .. .. -132 0 0 -85 3 45 21 3 5 1 87 21 -85 37 41 -84 29 55 -89 17 2 .. .. .. -133 0 0 -85 3 54 21 3 5 1 88 21 -85 37 49 -84 30 5 -89 17 4 .. .. .. -134 0 0 -85 3 58 21 3 5 1 89 21 -85 37 53 -84 30 10 -89 17 4 .. .. .. -135 0 0 -85 3 57 21 3 5 1 90 21 -85 37 52 -84 30 8 -89 17 4 .. .. .. -136 0 0 -85 3 50 21 3 5 1 91 21 -85 37 46 -84 30 1 -89 17 3 .. .. .. -137 0 0 -85 3 38 21 3 5 1 92 21 -85 37 35 -84 29 47 -89 17 1 .. .. .. -138 0 0 -85 3 21 21 3 5 1 93 21 -85 37 20 -84 29 28 -89 16 59 .. .. .. -139 0 0 -85 2 59 21 3 5 1 94 21 -85 37 0 -84 29 3 -89 16 56 .. .. .. -140 0 0 -85 2 31 21 3 5 1 95 21 -85 36 36 -84 28 32 -89 16 52 .. .. .. -141 0 0 -85 1 58 21 3 5 0 96 21 -85 36 6 -84 27 55 -89 16 47 .. .. .. -142 0 0 -85 1 19 21 3 5 0 97 21 -85 35 32 -84 27 13 -89 16 41 .. .. .. -143 0 0 -85 0 35 21 3 5 0 98 21 -85 34 53 -84 26 24 -89 16 34 .. .. .. -144 0 0 -84 59 45 21 3 5 0 99 21 -85 34 9 -84 25 29 -89 16 27 .. .. .. -145 0 0 -84 58 50 21 3 5 0 100 21 -85 33 20 .. .. .. -89 16 19 .. .. .. -146 0 0 .. .. .. .. .. .. .. .. .. -85 32 26 .. .. .. -89 16 10 .. .. .. -147 0 0 .. .. .. .. .. .. .. .. .. -85 31 27 .. .. .. -89 16 0 .. .. .. -148 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 15 49 .. .. .. -149 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 15 38 .. .. .. -150 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 15 25 .. .. .. -151 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 15 12 .. .. .. -152 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 14 57 .. .. .. -153 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 14 42 .. .. .. -154 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 14 25 .. .. .. -155 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 14 8 .. .. .. -156 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 13 49 .. .. .. -157 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 13 29 .. .. .. -158 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 13 9 .. .. .. -159 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 12 47 .. .. .. -160 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 12 23 .. .. .. -161 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 11 59 .. .. .. -162 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 11 33 .. .. .. -163 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 11 6 .. .. .. -164 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 10 38 .. .. .. -165 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 10 7 .. .. .. -166 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 9 36 .. .. .. -167 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 9 3 .. .. .. -168 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 8 28 .. .. .. -169 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 7 51 .. .. .. -170 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 7 13 .. .. .. -171 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 6 32 .. .. .. -172 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 5 50 .. .. .. -173 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 5 6 .. .. .. -174 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 4 19 .. .. .. -175 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 3 30 .. .. .. -176 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 2 38 .. .. .. -177 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 1 43 .. .. .. -178 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -89 0 46 .. .. .. -179 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 59 46 .. .. .. -180 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 58 43 .. .. .. 179 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 57 36 .. .. .. 178 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 56 25 .. .. .. 177 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 55 11 .. .. .. 176 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 53 53 .. .. .. 175 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 52 30 .. .. .. 174 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 51 2 .. .. .. 173 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 49 29 .. .. .. 172 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -88 47 51 .. .. .. Data for the target star ------------------------ * name: UCAC2 31266276 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 57 47.5491 DE: -01 00 14.571 * position source: Pos: UCAC2, pm: UCAC2, pi: * standard error: RA,DE ["]: ( .048, .048 ) * V mag [mag]: 12.6 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (0) 2005 RO43 approx. diameter [km]: 120 approx. diameter ["]: .006 distance from Earth [AU]: 27.31200 * orbital information: orbit source: Preston date of fit: 2007 Nov 02 source of used astrometry: MPC (via Astdys) number of used observations: 86 number of rejected observations: 0 time covered by the observations: 2004 Oct 10 - 2006 Nov 21 1 sigma uncertainty ellipse (major, minor, PA): 0.618, 0.440, 116° remarks: * orbital elements for (0) 2005 RO43 : Mean anomaly = 305.28608074 deg Arg. of pericenter = 326.79249926 deg Long. of node = 198.19583890 deg Inclination = 35.48934630 deg Eccentricity = 0.51901478 Semimajor axis = 28.76858858 AU Perihelion dist = 13.83726604 AU Mag: H = 7.21, G = 0.00 Epoch of elements : MJD 54499.88500000 TDT (2008 Feb 03.885) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 03 0 2005 RO43 21h 15.5m UT 12.6 2 57 47.549- 1 0 14.57UCAC2 31266276 0.0 21.9 120 14.7 27.312 0.038 1.37 -47.845 -1.004 224.59 -16.50 21.2576 .28065 -.11892 1.78112 4.23912 0.00596 0.00178 2000 305.2229412008 125.00000326.792499198.195839 35.4893460.5190147828.768588513.83726607.215 0.00 RATE .0638740 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.620 0.442 115.904.190 0.625 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 30, 22:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org