IOTA/IOTA-ES occultation update for (28) Bellona / TYC 6249-01041-1 event on 2008 Jan 12, 12:46 UT Visible from Mexico Summary ------- On 2008 Jan 12 UT, the 121 km diameter asteroid (28) Bellona will occult a 10.2 mag star in the constellation Sagittarius for observers along a path across Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 13.0 mag (the magnitude of the asteroid) for at most 2.8 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: 93 * date and approx. time of event: 2008 Jan 12, 12:44 - 2008 Jan 12, 12:49 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 2.9 * estimated maximum duration [s]: 2.8 * Moon: 16 % sunlit, 73° distance * Sun: 26° distance * rough path description: Mexico The occultation path -------------------- * approximate projected width [km]: 140 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .025", .021", 91° ) * approx speed of asteroid's shadow [km/s]: 43.2285 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6249-01041-1 by 28 Bellona on 2008 Jan 12 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 ' " Latitude Latitude Latitude Latitude -116 0 0 30 7 13 12 44 50 0 110 -25 29 27 9 30 47 34 .. .. .. .. .. .. -115 0 0 29 48 50 12 44 50 1 110 -24 29 8 47 30 29 11 .. .. .. 31 8 12 -114 0 0 29 30 27 12 44 50 2 111 -23 28 50 24 30 10 48 .. .. .. 30 49 48 -113 0 0 29 12 4 12 44 51 3 111 -22 28 32 1 29 52 23 .. .. .. 30 31 23 -112 0 0 28 53 40 12 44 51 4 112 -21 28 13 38 29 33 59 .. .. .. 30 12 58 -111 0 0 28 35 17 12 44 51 5 112 -20 27 55 16 29 15 35 27 17 6 29 54 33 -110 0 0 28 16 54 12 44 51 6 112 -19 27 36 54 28 57 11 26 58 46 29 36 8 -109 0 0 27 58 33 12 44 52 7 113 -18 27 18 34 28 38 49 26 40 26 29 17 45 -108 0 0 27 40 13 12 44 52 8 113 -17 27 0 15 28 20 28 26 22 8 28 59 23 -107 0 0 27 21 55 12 44 52 9 114 -16 26 41 58 28 2 9 26 3 53 28 41 3 -106 0 0 27 3 40 12 44 53 10 114 -15 26 23 44 27 43 53 25 45 40 28 22 46 -105 0 0 26 45 28 12 44 53 11 115 -14 26 5 34 27 25 39 25 27 31 28 4 31 -104 0 0 26 27 19 12 44 54 12 115 -13 25 47 26 27 7 29 25 9 24 27 46 19 -103 0 0 26 9 14 12 44 54 12 116 -13 25 29 23 26 49 23 24 51 22 27 28 12 -102 0 0 25 51 14 12 44 55 13 116 -12 25 11 24 26 31 21 24 33 24 27 10 8 -101 0 0 25 33 18 12 44 56 14 117 -11 24 53 29 26 13 23 24 15 32 26 52 9 -100 0 0 25 15 27 12 44 56 15 117 -10 24 35 40 25 55 31 23 57 44 26 34 15 - 99 0 0 24 57 42 12 44 57 16 118 -9 24 17 56 25 37 44 23 40 2 26 16 26 - 98 0 0 24 40 2 12 44 58 17 118 -8 24 0 19 25 20 3 23 22 26 25 58 43 - 97 0 0 24 22 29 12 44 59 18 119 -7 23 42 48 25 2 28 23 4 57 25 41 7 - 96 0 0 24 5 3 12 45 0 19 119 -6 23 25 24 24 45 0 22 47 34 25 23 37 - 95 0 0 23 47 45 12 45 1 20 120 -5 23 8 7 24 27 39 22 30 19 25 6 14 - 94 0 0 23 30 34 12 45 2 21 120 -4 22 50 58 24 10 26 22 13 12 24 48 59 - 93 0 0 23 13 31 12 45 3 22 120 -3 22 33 57 23 53 21 21 56 13 24 31 52 - 92 0 0 22 56 36 12 45 4 23 121 -2 22 17 5 23 36 25 21 39 23 24 14 54 - 91 0 0 22 39 51 12 45 5 24 121 -1 22 0 21 23 19 37 21 22 41 23 58 4 - 90 0 0 22 23 15 12 45 6 25 122 0 21 43 47 23 2 59 21 6 9 23 41 24 - 89 0 0 22 6 48 12 45 7 26 122 1 21 27 23 22 46 30 20 49 47 23 24 53 - 88 0 0 21 50 32 12 45 9 27 123 2 21 11 9 22 30 12 20 33 35 23 8 32 - 87 0 0 21 34 26 12 45 10 27 124 3 20 55 5 22 14 4 20 17 33 22 52 22 - 86 0 0 21 18 31 12 45 11 28 124 4 20 39 12 21 58 6 20 1 43 22 36 23 - 85 0 0 21 2 48 12 45 13 29 125 5 20 23 31 21 42 20 19 46 3 22 20 34 - 84 0 0 20 47 16 12 45 14 30 125 6 20 8 1 21 26 46 19 30 36 22 4 58 - 83 0 0 20 31 55 12 45 16 31 126 7 19 52 43 21 11 24 19 15 20 21 49 33 - 82 0 0 20 16 48 12 45 17 32 126 8 19 37 38 20 56 14 19 0 17 21 34 21 - 81 0 0 20 1 53 12 45 19 33 127 9 19 22 45 20 41 16 18 45 26 21 19 21 - 80 0 0 19 47 11 12 45 20 34 127 9 19 8 6 20 26 32 18 30 49 21 4 34 - 79 0 0 19 32 42 12 45 22 35 128 10 18 53 39 20 12 1 18 16 25 20 50 1 - 78 0 0 19 18 27 12 45 24 36 129 11 18 39 27 19 57 43 18 2 14 20 35 41 - 77 0 0 19 4 26 12 45 25 37 129 12 18 25 28 19 43 40 17 48 18 20 21 36 - 76 0 0 18 50 40 12 45 27 37 130 13 18 11 44 19 29 51 17 34 36 20 7 44 - 75 0 0 18 37 8 12 45 29 38 131 14 17 58 14 19 16 17 17 21 8 19 54 8 - 74 0 0 18 23 51 12 45 31 39 131 15 17 45 0 19 2 58 17 7 56 19 40 46 - 73 0 0 18 10 49 12 45 33 40 132 16 17 32 0 18 49 54 16 54 59 19 27 40 - 72 0 0 17 58 3 12 45 35 41 133 17 17 19 16 18 37 5 16 42 17 19 14 49 - 71 0 0 17 45 32 12 45 37 42 133 18 17 6 48 18 24 32 16 29 51 19 2 14 - 70 0 0 17 33 18 12 45 39 43 134 19 16 54 36 18 12 16 16 17 41 18 49 55 - 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39 0 0 13 45 25 12 46 51 60 176 44 13 7 29 14 23 36 12 31 18 15 0 30 - 38 0 0 13 43 23 12 46 53 60 178 45 13 5 27 14 21 33 12 29 16 14 58 26 - 37 0 0 13 41 41 12 46 56 60 180 46 13 3 46 14 19 51 12 27 35 14 56 44 - 36 0 0 13 40 21 12 46 58 60 182 46 13 2 26 14 18 30 12 26 15 14 55 22 - 35 0 0 13 39 21 12 47 1 60 184 47 13 1 26 14 17 30 12 25 16 14 54 22 - 34 0 0 13 38 42 12 47 3 60 186 47 13 0 47 14 16 51 12 24 37 14 53 43 - 33 0 0 13 38 24 12 47 6 59 187 48 13 0 29 14 16 33 12 24 19 14 53 25 - 32 0 0 13 38 27 12 47 8 59 189 49 13 0 32 14 16 36 12 24 22 14 53 28 - 31 0 0 13 38 51 12 47 11 59 191 49 13 0 56 14 17 0 12 24 46 14 53 52 - 30 0 0 13 39 35 12 47 13 59 193 50 13 1 41 14 17 45 12 25 30 14 54 37 - 29 0 0 13 40 41 12 47 16 59 195 50 13 2 46 14 18 51 12 26 36 14 55 43 - 28 0 0 13 42 8 12 47 18 58 197 50 13 4 13 14 20 18 12 28 2 14 57 10 - 27 0 0 13 43 55 12 47 21 58 198 51 13 6 0 14 22 6 12 29 48 14 58 59 - 26 0 0 13 46 4 12 47 23 58 200 51 13 8 7 14 24 14 12 31 56 15 1 8 - 25 0 0 13 48 33 12 47 26 57 202 52 13 10 36 14 26 44 12 34 24 15 3 38 - 24 0 0 13 51 22 12 47 28 57 203 52 13 13 25 14 29 34 12 37 12 15 6 29 - 23 0 0 13 54 33 12 47 31 56 205 52 13 16 35 14 32 46 12 40 21 15 9 41 - 22 0 0 13 58 4 12 47 33 56 206 52 13 20 5 14 36 18 12 43 51 15 13 14 - 21 0 0 14 1 56 12 47 36 55 208 53 13 23 56 14 40 10 12 47 41 15 17 7 - 20 0 0 14 6 8 12 47 38 55 209 53 13 28 8 14 44 23 12 51 52 15 21 21 - 19 0 0 14 10 41 12 47 40 54 211 53 13 32 39 14 48 57 12 56 22 15 25 56 - 18 0 0 14 15 34 12 47 43 54 212 53 13 37 31 14 53 51 13 1 13 15 30 51 - 17 0 0 14 20 47 12 47 45 53 213 53 13 42 43 14 59 5 13 6 24 15 36 6 - 16 0 0 14 26 20 12 47 48 53 215 53 13 48 15 15 4 40 13 11 55 15 41 42 - 15 0 0 14 32 13 12 47 50 52 216 54 13 54 7 15 10 34 13 17 46 15 47 38 - 14 0 0 14 38 27 12 47 52 51 217 54 14 0 19 15 16 49 13 23 57 15 53 54 - 13 0 0 14 45 0 12 47 54 51 218 54 14 6 51 15 23 24 13 30 28 16 0 30 - 12 0 0 14 51 53 12 47 57 50 219 53 14 13 43 15 30 18 13 37 18 16 7 25 - 11 0 0 14 59 5 12 47 59 49 220 53 14 20 54 15 37 32 13 44 27 16 14 41 - 10 0 0 15 6 37 12 48 1 48 221 53 14 28 24 15 45 5 13 51 56 16 22 16 - 9 0 0 15 14 28 12 48 3 48 222 53 14 36 13 15 52 58 13 59 44 16 30 10 - 8 0 0 15 22 38 12 48 5 47 223 53 14 44 22 16 1 10 14 7 51 16 38 24 - 7 0 0 15 31 7 12 48 8 46 224 53 14 52 49 16 9 41 14 16 17 16 46 56 - 6 0 0 15 39 55 12 48 10 45 225 53 15 1 35 16 18 31 14 25 1 16 55 48 - 5 0 0 15 49 2 12 48 12 45 226 52 15 10 40 16 27 39 14 34 4 17 4 58 - 4 0 0 15 58 27 12 48 14 44 227 52 15 20 3 16 37 6 14 43 26 17 14 27 - 3 0 0 16 8 10 12 48 16 43 227 52 15 29 45 16 46 51 14 53 5 17 24 14 - 2 0 0 16 18 12 12 48 18 42 228 51 15 39 44 16 56 54 15 3 3 17 34 19 - 1 0 0 16 28 31 12 48 20 41 229 51 15 50 1 17 7 16 15 13 18 17 44 43 0 0 0 16 39 8 12 48 22 40 230 50 16 0 36 17 17 55 15 23 51 17 55 24 1 0 0 16 50 2 12 48 24 40 230 50 16 11 28 17 28 51 15 34 41 18 6 22 2 0 0 17 1 13 12 48 25 39 231 50 16 22 37 17 40 4 15 45 48 18 17 38 3 0 0 17 12 42 12 48 27 38 232 49 16 34 4 17 51 35 15 57 12 18 29 10 4 0 0 17 24 27 12 48 29 37 232 49 16 45 47 18 3 22 16 8 53 18 41 0 5 0 0 17 36 28 12 48 31 36 233 48 16 57 46 18 15 26 16 20 51 18 53 6 6 0 0 17 48 46 12 48 32 35 234 48 17 10 2 18 27 46 16 33 4 19 5 28 7 0 0 18 1 20 12 48 34 34 234 47 17 22 33 18 40 22 16 45 34 19 18 6 8 0 0 18 14 9 12 48 36 33 235 46 17 35 20 18 53 14 16 58 19 19 31 0 9 0 0 18 27 14 12 48 37 33 235 46 17 48 23 19 6 21 17 11 19 19 44 10 10 0 0 18 40 34 12 48 39 32 236 45 18 1 40 19 19 44 17 24 34 19 57 34 11 0 0 18 54 9 12 48 40 31 236 45 18 15 13 19 33 21 17 38 5 20 11 14 12 0 0 19 7 58 12 48 42 30 237 44 18 29 0 19 47 12 17 51 49 20 25 8 13 0 0 19 22 2 12 48 43 29 237 43 18 43 1 20 1 18 18 5 48 20 39 16 14 0 0 19 36 19 12 48 45 28 238 43 18 57 16 20 15 38 18 20 1 20 53 38 15 0 0 19 50 50 12 48 46 27 238 42 19 11 45 20 30 11 18 34 28 21 8 14 16 0 0 20 5 34 12 48 47 26 239 41 19 26 27 20 44 58 18 49 7 21 23 3 17 0 0 20 20 31 12 48 49 25 239 40 19 41 21 20 59 57 19 4 0 21 38 4 18 0 0 20 35 41 12 48 50 24 240 40 19 56 29 21 15 9 19 19 5 21 53 19 19 0 0 20 51 3 12 48 51 23 240 39 20 11 48 21 30 33 19 34 23 22 8 45 20 0 0 21 6 36 12 48 52 22 241 38 20 27 20 21 46 9 19 49 52 22 24 23 21 0 0 21 22 22 12 48 53 21 241 37 20 43 3 22 1 57 20 5 33 22 40 13 22 0 0 21 38 18 12 48 54 20 242 37 20 58 57 22 17 55 20 21 25 22 56 14 23 0 0 21 54 25 12 48 55 19 242 36 21 15 2 22 34 5 20 37 28 23 12 25 24 0 0 22 10 42 12 48 56 18 242 35 21 31 17 22 50 24 20 53 41 23 28 47 25 0 0 22 27 10 12 48 57 18 243 34 21 47 42 23 6 54 21 10 4 23 45 19 26 0 0 22 43 47 12 48 58 17 243 33 22 4 17 23 23 33 21 26 37 24 2 0 27 0 0 23 0 33 12 48 59 16 244 33 22 21 1 23 40 22 21 43 19 24 18 51 28 0 0 23 17 28 12 48 59 15 244 32 22 37 54 23 57 19 22 0 10 24 35 50 29 0 0 23 34 32 12 49 0 14 245 31 22 54 56 24 14 24 22 17 10 24 52 57 30 0 0 23 51 43 12 49 1 13 245 30 23 12 5 24 31 38 22 34 18 25 10 13 31 0 0 24 9 2 12 49 1 12 246 29 23 29 22 24 48 58 22 51 33 25 27 35 32 0 0 24 26 28 12 49 2 11 246 28 23 46 46 25 6 26 23 8 55 25 45 5 33 0 0 24 44 1 12 49 2 10 246 27 24 4 17 25 24 1 23 26 25 26 2 42 34 0 0 25 1 40 12 49 3 9 247 27 24 21 55 25 41 42 23 44 0 26 20 24 35 0 0 25 19 25 12 49 3 8 247 26 24 39 38 25 59 29 24 1 42 26 38 13 36 0 0 25 37 15 12 49 4 7 248 25 24 57 27 26 17 21 24 19 30 26 56 6 37 0 0 25 55 11 12 49 4 6 248 24 25 15 21 26 35 18 24 37 22 27 14 5 38 0 0 26 13 11 12 49 4 5 249 23 25 33 20 26 53 19 24 55 19 27 32 8 39 0 0 26 31 15 12 49 5 4 249 22 25 51 22 27 11 25 .. .. .. 27 50 15 40 0 0 26 49 23 12 49 5 3 249 21 26 9 29 27 29 34 .. .. .. 28 8 26 41 0 0 27 7 34 12 49 5 2 250 21 26 27 39 27 47 47 .. .. .. 28 26 40 42 0 0 27 25 49 12 49 5 1 250 20 26 45 52 28 6 2 .. .. .. 28 44 56 43 0 0 27 44 5 12 49 5 0 251 19 27 4 7 28 24 20 .. .. .. 29 3 15 Data for the target star ------------------------ * name: TYC 6249-01041-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 44 26.0959 DE: -16 40 38.293 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .020 ) * V mag [mag]: 10.2 * B mag [mag]: 12.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (28) Bellona approx. diameter [km]: 121 approx. diameter ["]: .043 distance from Earth [AU]: 3.86000 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1368 number of rejected observations: 158 time covered by the observations: 1900 Feb 08 - 2007 Jun 19 1 sigma uncertainty ellipse (major, minor, PA): 0.008, 0.006, 96° remarks: * orbital elements for (28) Bellona : Mean anomaly = 116.47382256 deg Arg. of pericenter = 343.00824703 deg Long. of node = 144.45117673 deg Inclination = 9.40180244 deg Eccentricity = 0.14818818 Semimajor axis = 2.78071027 AU Perihelion dist = 2.36864188 AU Mag: H = 7.06, G = 0.15 Epoch of elements : MJD 54477.53300000 TDT (2008 Jan 12.533) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 12 28 Bellona 12h 47.0m UT 10.2 17 44 26.096-16 40 38.29TYC 6249-01041-1 12.2 13.0 121 2.8 3.860 3.868 -1.20 -37.028 -16.677 -9.71 -21.69 12.7827 .01133 .50399 24.39367 -0.52798 -0.00259 0.00071 2000 114.8726492008 1 5.00000343.008247144.451177 9.4018020.148188182.780710272.368641887.095 0.15 RATE 2.1255460 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.025 0.021 90.6 1.480 0.021 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org