IOTA/IOTA-ES occultation update for (327) Columbia / TYC 5240-00367-1 event on 2009 Dec 01, 16:38 UT Visible from Summary ------- On 2009 Dec 01 UT, the 26 km diameter asteroid (327) Columbia will occult a 10.3 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.3 mag (the magnitude of the asteroid) for at most 1.5 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: 39 * date and approx. time of event: 2009 Dec 01, 16:39 - 2009 Dec 01, 16:41 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 1.5 * Moon: 99 % sunlit, 81° distance * Sun: 91° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 49 * 1 sigma uncertainty interval [path widths]: +/- 1.69 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .023", 73° ) * approx speed of asteroid's shadow [km/s]: 17.4268 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5240-00367-1 by 327 Columbia on 2009 Dec 1 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 46 37 20 82 0 0 16 41 51 0 206 -26 48 23 37 44 51 53 ... .. .. 38 59 57 43 20 13 81 0 0 16 41 50 2 203 -26 44 53 25 41 47 29 ... .. .. 36 36 35 Latitude Latitude Latitude Latitude 42 0 0 80 32 18 16 41 50 2 202 -26 80 1 18 81 4 25 78 23 27 .. .. .. 41 0 0 80 10 14 16 41 50 2 201 -26 79 38 50 80 42 47 77 59 54 82 43 35 40 0 0 79 46 57 16 41 50 3 200 -26 79 15 12 80 19 55 77 35 16 82 22 31 39 0 0 79 22 26 16 41 49 3 199 -25 78 50 21 79 55 45 77 9 32 82 0 1 38 0 0 78 56 38 16 41 49 4 198 -25 78 24 16 79 30 16 76 42 39 81 36 0 37 0 0 78 29 30 16 41 49 4 197 -25 77 56 54 79 3 25 76 14 36 81 10 25 36 0 0 78 1 3 16 41 48 5 196 -25 77 28 14 78 35 11 75 45 24 80 43 13 35 0 0 77 31 13 16 41 48 5 195 -25 76 58 15 78 5 32 75 15 0 80 14 20 34 0 0 77 0 2 16 41 47 6 194 -25 76 26 58 77 34 27 74 43 26 79 43 46 33 0 0 76 27 27 16 41 46 6 193 -25 75 54 21 77 1 56 74 10 41 79 11 29 32 0 0 75 53 31 16 41 45 7 192 -25 75 20 25 76 28 0 73 36 46 78 37 30 31 0 0 75 18 14 16 41 44 8 191 -25 74 45 11 75 52 39 73 1 42 78 1 49 30 0 0 74 41 38 16 41 43 8 190 -24 74 8 42 75 15 54 72 25 29 77 24 29 29 0 0 74 3 44 16 41 42 9 189 -24 73 30 57 74 37 49 71 48 11 76 45 33 28 0 0 73 24 35 16 41 41 10 188 -24 72 52 1 73 58 26 71 9 48 76 5 3 27 0 0 72 44 14 16 41 39 10 187 -24 72 11 55 73 17 48 70 30 23 75 23 5 26 0 0 72 2 44 16 41 37 11 186 -24 71 30 43 72 35 58 69 49 59 74 39 44 25 0 0 71 20 9 16 41 35 12 185 -23 70 48 28 71 53 1 69 8 39 73 55 5 24 0 0 70 36 34 16 41 33 13 184 -23 70 5 15 71 9 2 68 26 26 73 9 14 23 0 0 69 52 3 16 41 31 13 183 -23 69 21 7 70 24 4 67 43 23 72 22 18 22 0 0 69 6 39 16 41 29 14 182 -22 68 36 9 69 38 12 66 59 35 71 34 22 21 0 0 68 20 28 16 41 26 15 181 -22 67 50 25 68 51 32 66 15 4 70 45 34 20 0 0 67 33 35 16 41 23 16 180 -21 67 3 59 68 4 9 65 29 55 69 55 59 19 0 0 66 46 4 16 41 21 16 178 -21 66 16 56 67 16 6 64 44 11 69 5 44 18 0 0 65 58 0 16 41 17 17 177 -20 65 29 21 66 27 31 63 57 57 68 14 54 17 0 0 65 9 28 16 41 14 18 176 -20 64 41 17 65 38 27 63 11 16 67 23 36 16 0 0 64 20 31 16 41 11 19 175 -19 63 52 50 64 48 59 62 24 13 66 31 55 15 0 0 63 31 16 16 41 7 20 174 -19 63 4 4 63 59 12 61 36 51 65 39 56 14 0 0 62 41 46 16 41 3 20 173 -18 62 15 3 63 9 10 60 49 14 64 47 45 13 0 0 61 52 5 16 40 59 21 172 -17 61 25 51 62 18 58 60 1 27 63 55 26 12 0 0 61 2 18 16 40 55 22 171 -17 60 36 33 61 28 40 59 13 31 63 3 4 11 0 0 60 12 28 16 40 50 23 170 -16 59 47 11 60 38 20 58 25 32 62 10 43 10 0 0 59 22 40 16 40 46 23 168 -15 58 57 50 59 48 2 57 37 33 61 18 27 9 0 0 58 32 56 16 40 41 24 167 -14 58 8 34 58 57 50 56 49 37 60 26 20 8 0 0 57 43 21 16 40 36 25 166 -14 57 19 25 58 7 47 56 1 47 59 34 26 7 0 0 56 53 58 16 40 31 25 165 -13 56 30 27 57 17 55 55 14 7 58 42 48 6 0 0 56 4 49 16 40 26 26 164 -12 55 41 44 56 28 20 54 26 39 57 51 28 5 0 0 55 15 57 16 40 20 27 162 -11 54 53 17 55 39 3 53 39 26 57 0 31 4 0 0 54 27 27 16 40 15 27 161 -10 54 5 10 54 50 7 52 52 31 56 9 59 3 0 0 53 39 19 16 40 9 28 160 -9 53 17 25 54 1 35 52 5 57 55 19 54 2 0 0 52 51 37 16 40 4 28 159 -9 52 30 6 53 13 29 51 19 46 54 30 18 1 0 0 52 4 23 16 39 58 29 157 -8 51 43 13 52 25 52 50 34 0 53 41 15 0 0 0 51 17 39 16 39 52 29 156 -7 50 56 50 51 38 46 49 48 41 52 52 46 - 1 0 0 50 31 27 16 39 46 30 155 -6 50 10 59 50 52 13 49 3 52 52 4 53 - 2 0 0 49 45 49 16 39 40 30 153 -5 49 25 40 50 6 15 48 19 35 51 17 38 - 3 0 0 49 0 47 16 39 34 30 152 -4 48 40 57 49 20 53 47 35 51 50 31 2 - 4 0 0 48 16 23 16 39 28 31 151 -3 47 56 51 48 36 9 46 52 42 49 45 7 - 5 0 0 47 32 37 16 39 22 31 149 -2 47 13 24 47 52 6 46 10 9 48 59 56 - 6 0 0 46 49 33 16 39 15 31 148 -1 46 30 36 47 8 44 45 28 15 48 15 28 - 7 0 0 46 7 10 16 39 9 32 147 0 45 48 30 46 26 4 44 47 0 47 31 45 Uncertainty in time = +/- 3 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 5240-00367-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 45 26.1915 DE: -06 52 11.120 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .020 ) * V mag [mag]: 10.3 * B mag [mag]: 10.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (327) Columbia approx. diameter [km]: 26 approx. diameter ["]: .014 distance from Earth [AU]: 2.47500 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 793 number of rejected observations: 119 time covered by the observations: 1903 Oct 19 - 2008 Feb 10 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.012, 60° remarks: * orbital elements for (327) Columbia : Mean anomaly = 52.87682370 deg Arg. of pericenter = 308.00705747 deg Long. of node = 354.83089080 deg Inclination = 7.15107472 deg Eccentricity = 0.06427392 Semimajor axis = 2.77617832 AU Perihelion dist = 2.59774247 AU Mag: H = 9.85, G = 0.15 Epoch of elements : MJD 55166.69300000 TDT (2009 Dec 01.693) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 1 327 Columbia 16h 38.6m UT 10.3 22 45 26.191- 6 52 11.12TYC 5240-00367-1 10.8 15.3 26 1.5 2.475 2.064 16.62 21.0352 -6.874 -72.36 -21.89 16.6436 -0.40341 0.74321 8.65211 4.67876 0.00542 0.00220 2000 51.45071120091125.00000308.007057354.830891 7.1510750.06427392 2.7761783 2.597742510.1 5.00.15 RATE 2.1307530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.023 73 2.69 0.024 0 54581.5020091201_0367-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org