IOTA/IOTA-ES occultation update for (526) Jena / TYC 1342-01729-1 event on 2008 Mar 27, 12:21 UT Visible from NE Russia, Alaska Summary ------- On 2008 Mar 27 UT, the 42 km diameter asteroid (526) Jena will occult a 9.6 mag star in the constellation Gemini for observers along a path across NE Russia, Alaska. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 15.3 mag (the magnitude of the asteroid) for at most 2.6 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 66 * date and approx. time of event: 2008 Mar 27, 12:22 - 2008 Mar 27, 12:25 UT * midpoint of event [JD]: 2454553.0152 * magnitude of target star: 9.6 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 2.6 * Moon: 72 % sunlit, 151° distance * Sun: 92° distance * rough path description: NE Russia, Alaska The occultation path -------------------- * approximate projected width [km]: 80 * 1 sigma uncertainty interval [path widths]: +/- 0.91 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .023 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .023", .021", 91° ) * approx speed of asteroid's shadow [km/s]: 16.0738 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1342-01729-1 by 526 Jena on 2008 Mar 27 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 106 11 38 80 53 33 12 22 9 31 198 0 106 53 34 81 14 30 105 33 12 80 32 44 108 20 34 81 53 0 104 30 54 79 55 15 110 45 30 80 41 48 12 22 14 31 203 -1 111 37 5 81 2 12 109 58 3 80 21 30 113 23 28 81 39 33 108 40 50 79 44 50 115 9 22 80 27 35 12 22 20 31 208 -2 116 9 17 80 47 20 114 14 2 80 7 54 118 12 4 81 23 21 112 43 33 79 32 12 119 22 18 80 11 4 12 22 25 31 213 -3 120 29 13 80 30 5 118 20 14 79 52 2 122 45 22 81 4 37 116 38 15 79 17 27 123 23 46 79 52 23 12 22 30 31 217 -3 124 36 24 80 10 37 122 16 9 79 34 5 127 3 6 80 43 35 120 24 23 79 0 42 127 13 39 79 31 42 12 22 35 30 221 -4 128 30 46 79 49 7 126 1 31 79 14 10 131 5 28 80 20 27 124 1 39 78 42 4 130 52 3 79 9 10 12 22 41 30 225 -5 132 12 36 79 25 45 129 36 23 78 52 26 134 53 5 79 55 25 127 29 58 78 21 40 134 19 21 78 44 56 12 22 46 30 229 -6 135 42 24 79 0 40 133 1 0 78 29 1 138 26 47 79 28 39 130 49 25 77 59 37 137 36 3 78 19 7 12 22 51 30 233 -6 139 0 49 78 33 59 136 15 46 78 4 1 141 47 34 79 0 18 134 0 15 77 36 1 140 42 48 77 51 50 12 22 56 30 236 -7 142 8 38 78 5 51 139 21 12 77 37 34 144 56 31 78 30 31 137 2 49 77 10 58 143 40 17 77 23 12 12 23 2 29 240 -8 145 6 39 77 36 21 142 17 54 77 9 44 147 54 41 77 59 23 139 57 31 76 44 32 146 29 13 76 53 16 12 23 7 29 243 -9 147 55 42 77 5 35 145 6 27 76 40 36 150 43 9 77 27 1 142 44 51 76 16 49 149 10 19 76 22 7 12 23 12 29 246 -9 150 36 35 76 33 36 147 47 31 76 10 16 153 22 54 76 53 28 145 25 17 75 47 53 151 44 19 75 49 48 12 23 17 28 249 -10 153 10 7 76 0 28 150 21 44 75 38 45 155 54 53 76 18 47 147 59 22 75 17 45 154 11 52 75 16 23 12 23 23 28 252 -11 155 37 2 75 26 14 152 49 42 75 6 7 158 19 59 75 43 2 150 27 35 74 46 30 156 33 39 74 41 52 12 23 28 27 254 -12 157 58 3 74 50 56 155 12 3 74 32 23 160 39 1 75 6 13 152 50 28 74 14 8 158 50 18 74 6 17 12 23 33 27 257 -12 160 13 51 74 14 33 157 29 21 73 57 35 162 52 44 74 28 20 155 8 31 73 40 42 161 2 22 73 29 39 12 23 38 26 259 -13 162 25 2 73 37 7 159 42 9 73 21 43 165 1 50 73 49 24 157 22 13 73 6 12 163 10 28 72 51 56 12 23 44 26 262 -14 164 32 14 72 58 36 161 50 59 72 44 47 167 6 59 73 9 24 159 32 2 72 30 38 165 15 7 72 13 7 12 23 49 25 264 -15 166 36 0 72 18 59 163 56 22 72 6 45 169 8 48 72 28 16 161 38 27 71 53 59 167 16 50 71 33 11 12 23 54 25 267 -15 168 36 54 71 38 14 165 58 48 71 27 36 171 7 52 71 45 59 163 41 54 71 16 13 169 16 9 70 52 3 12 23 59 24 269 -16 170 35 26 70 56 17 167 58 47 70 47 18 173 4 46 71 2 27 165 42 50 70 37 20 171 13 32 70 9 42 12 24 5 24 271 -17 172 32 10 70 13 3 169 56 46 70 5 46 175 0 4 70 17 36 167 41 41 69 57 16 173 9 32 69 26 0 12 24 10 23 273 -18 174 27 36 69 28 28 171 53 15 69 22 56 176 54 20 69 31 18 169 38 55 69 15 56 175 4 38 68 40 51 12 24 15 22 275 -19 176 22 17 68 42 23 173 48 44 68 38 42 178 48 10 68 43 25 171 34 58 68 33 16 176 59 25 67 54 8 12 24 20 21 277 -19 178 16 49 67 54 40 175 43 45 67 52 56 -179 17 47 67 53 45 173 30 20 67 49 9 178 54 29 67 5 38 12 24 26 20 279 -20 -179 48 10 67 5 5 177 38 51 67 5 28 -177 22 47 67 2 3 175 25 30 67 3 28 -179 9 31 66 15 9 12 24 31 20 281 -21 -177 51 56 66 13 24 179 34 40 66 16 7 -175 26 0 66 8 1 177 21 3 66 16 1 -177 11 45 65 22 22 12 24 36 19 283 -22 -175 53 37 65 19 17 -178 28 2 65 24 35 -173 26 25 65 11 13 179 17 38 65 26 35 -175 11 15 64 26 53 12 24 41 17 285 -22 -173 52 8 64 22 16 -176 28 23 64 30 31 -171 22 41 64 11 4 -178 44 1 64 34 53 -173 6 47 63 28 9 12 24 47 16 287 -23 -171 46 5 63 21 44 -174 25 16 63 33 28 -169 12 59 63 6 44 -176 42 56 63 40 33 -170 56 37 62 25 24 12 24 52 15 290 -24 -169 33 29 62 16 45 -172 17 12 62 32 43 -166 54 40 61 56 57 -174 37 57 62 43 2 -168 38 17 61 17 28 12 24 57 14 292 -25 -167 11 21 61 5 54 -170 2 2 61 27 20 -164 23 23 60 39 34 -172 27 25 61 41 36 -166 7 49 60 2 24 12 25 2 12 294 -25 -164 34 45 59 46 46 -167 36 35 60 15 44 -161 30 59 59 10 34 -170 9 0 60 35 9 -163 18 1 58 36 43 12 25 8 10 297 -26 -161 33 52 58 14 33 -164 55 15 58 55 13 -157 57 39 57 20 9 -167 38 58 59 21 55 -159 52 20 56 52 17 12 25 13 8 300 -27 -157 42 35 56 16 22 -161 46 41 57 20 16 -151 58 35 54 16 29 -164 50 42 57 58 41 -154 43 55 54 16 23 12 25 18 4 304 -28 ... .. .. .. .. .. -157 37 29 55 14 32 ... .. .. .. .. .. -161 29 36 56 18 22 Uncertainty in time = +/- 3 secs [Prediction of 2008 Feb 14.0] Data for the target star ------------------------ * name: TYC 1342-01729-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 40 14.9820 DE: +22 25 22.108 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .017 ) * V mag [mag]: 9.6 * B mag [mag]: 9.8 * Apparent position with proper motion RA(deg): 100.1898070137 DE(deg): 22.4166773018 * Equation of equinoxes (radians) : 0.000040716810949 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (526) Jena approx. diameter [km]: 42 approx. diameter ["]: .023 distance from Earth [AU]: 2.46800 * orbital information: orbit source: Preston date of fit: 2008 Feb 13 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1029 number of rejected observations: 103 time covered by the observations: 1904 Mar 15 - 2008 Jan 31 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.012, 92° remarks: * orbital elements for (526) Jena : Mean anomaly = 348.24032972 deg Arg. of pericenter = 358.71767310 deg Long. of node = 137.92042165 deg Inclination = 2.17160809 deg Eccentricity = 0.13877530 Semimajor axis = 3.11823151 AU Perihelion dist = 2.68549799 AU Mag: H = 10.05, G = 0.15 Epoch of elements : MJD 54552.51500000 TDT (2008 Mar 27.515) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 27 526 Jena 12h 21.9m UT 9.6 6 40 14.982 22 25 22.11TYC 1342-01729-1 9.8 15.3 42 2.6 2.468 2.332 -0.29 89.2848 22.424 -4.15 2.86 12.3648 0.00630 0.85204 9.07212 -0.08139 0.00571 -0.00039 2000 347.7901572008 325.00000358.717673137.920422 2.1716080.13877530 3.1182315 2.685498010.2 5.00.15 RATE 1.7899530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.023 0.021 91 1.91 0.021 0 54510.5020080327_1729-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 14, 19:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org