IOTA/IOTA-ES occultation update for (1719) Jens / TYC 2408-00609-1 event on 2010 Mar 21, 21:02 UT Visible from Africa, Europe Summary ------- On 2010 Mar 21 UT, the 19 km diameter asteroid (1719) Jens will occult a 9.3 mag star in the constellation Auriga 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 7.0 mag to 16.3 mag (the magnitude of the asteroid) for at most 0.9 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: 28 * date and approx. time of event: 2010 Mar 21, 21:01 - 2010 Mar 21, 21:06 UT * magnitude of target star: 9.3 * magnitude drop [mag]: 7.0 * estimated maximum duration [s]: 0.9 * Moon: 33 % sunlit, 15° distance * Sun: 85° distance * rough path description: Africa, Europe The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 2.41 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .026", 97° ) * approx speed of asteroid's shadow [km/s]: 22.2036 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2408-00609-1 by 1719 Jens on 2010 Mar 21 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 - 43 0 0 55 15 23 21 1 54 66 194 0 55 9 21 55 21 26 54 40 20 55 50 37 - 42 0 0 55 1 4 21 1 57 66 196 -1 54 55 0 55 7 8 54 25 51 55 36 26 - 41 0 0 54 46 15 21 2 0 66 198 -1 54 40 10 54 52 20 54 10 53 55 21 46 - 40 0 0 54 30 56 21 2 4 66 201 -2 54 24 49 54 37 3 53 55 25 55 6 37 - 39 0 0 54 15 7 21 2 7 66 203 -2 54 8 59 54 21 16 53 39 27 54 50 57 - 38 0 0 53 58 48 21 2 10 66 205 -3 53 52 38 54 4 58 53 22 58 54 34 48 - 37 0 0 53 41 57 21 2 14 66 208 -4 53 35 45 53 48 9 53 5 58 54 18 7 - 36 0 0 53 24 35 21 2 17 66 210 -4 53 18 21 53 30 49 52 48 26 54 0 55 - 35 0 0 53 6 41 21 2 20 66 212 -5 53 0 25 53 12 56 52 30 21 53 43 11 - 34 0 0 52 48 14 21 2 24 66 215 -6 52 41 57 52 54 31 52 11 44 53 24 54 - 33 0 0 52 29 14 21 2 27 66 217 -6 52 22 55 52 35 33 51 52 34 53 6 5 - 32 0 0 52 9 41 21 2 31 66 219 -7 52 3 21 52 16 2 51 32 51 52 46 43 - 31 0 0 51 49 34 21 2 34 66 222 -8 51 43 12 51 55 57 51 12 33 52 26 47 - 30 0 0 51 28 53 21 2 38 66 224 -8 51 22 29 51 35 17 50 51 41 52 6 16 - 29 0 0 51 7 37 21 2 41 65 226 -9 51 1 11 51 14 3 50 30 14 51 45 11 - 28 0 0 50 45 45 21 2 45 65 229 -10 50 39 17 50 52 14 50 8 12 51 23 31 - 27 0 0 50 23 18 21 2 49 65 231 -10 50 16 49 50 29 49 49 45 34 51 1 15 - 26 0 0 50 0 15 21 2 53 65 233 -11 49 53 44 50 6 48 49 22 20 50 38 23 - 25 0 0 49 36 36 21 2 56 64 236 -12 49 30 2 49 43 10 48 58 29 50 14 55 - 24 0 0 49 12 19 21 3 0 64 238 -13 49 5 44 49 18 55 48 34 2 49 50 50 - 23 0 0 48 47 25 21 3 4 64 240 -13 48 40 48 48 54 3 48 8 57 49 26 7 - 22 0 0 48 21 54 21 3 8 63 242 -14 48 15 14 48 28 34 47 43 14 49 0 47 - 21 0 0 47 55 45 21 3 12 63 244 -15 47 49 3 48 2 26 47 16 53 48 34 49 - 20 0 0 47 28 57 21 3 16 62 246 -16 47 22 13 47 35 41 46 49 55 48 8 13 - 19 0 0 47 1 31 21 3 20 62 249 -16 46 54 45 47 8 16 46 22 17 47 40 58 - 18 0 0 46 33 26 21 3 24 62 251 -17 46 26 38 46 40 13 45 54 1 47 13 4 - 17 0 0 46 4 42 21 3 28 61 253 -18 45 57 53 46 11 31 45 25 7 46 44 31 - 16 0 0 45 35 19 21 3 32 60 254 -19 45 28 28 45 42 10 44 55 33 46 15 19 - 15 0 0 45 5 16 21 3 36 60 256 -20 44 58 23 45 12 9 44 25 20 45 45 27 - 14 0 0 44 34 35 21 3 40 59 258 -21 44 27 40 44 41 30 43 54 28 45 14 56 - 13 0 0 44 3 14 21 3 45 59 260 -22 43 56 17 44 10 11 43 22 56 44 43 46 - 12 0 0 43 31 13 21 3 49 58 262 -22 43 24 15 43 38 12 42 50 46 44 11 56 - 11 0 0 42 58 34 21 3 53 57 263 -23 42 51 34 43 5 34 42 17 57 43 39 26 - 10 0 0 42 25 16 21 3 57 57 265 -24 42 18 14 42 32 17 41 44 29 43 6 18 - 9 0 0 41 51 18 21 4 2 56 267 -25 41 44 15 41 58 22 41 10 22 42 32 30 - 8 0 0 41 16 42 21 4 6 55 268 -26 41 9 38 41 23 48 40 35 37 41 58 3 - 7 0 0 40 41 28 21 4 10 55 270 -27 40 34 22 40 48 35 40 0 15 41 22 58 - 6 0 0 40 5 37 21 4 15 54 271 -28 39 58 29 40 12 45 39 24 15 40 47 15 - 5 0 0 39 29 8 21 4 19 53 273 -29 39 21 59 39 36 17 38 47 38 40 10 54 - 4 0 0 38 52 2 21 4 23 52 274 -30 38 44 52 38 59 13 38 10 24 39 33 57 - 3 0 0 38 14 21 21 4 28 51 275 -31 38 7 9 38 21 33 37 32 36 38 56 22 - 2 0 0 37 36 4 21 4 32 50 277 -32 37 28 51 37 43 17 36 54 12 38 18 13 - 1 0 0 36 57 13 21 4 37 50 278 -33 36 49 59 37 4 27 36 15 15 37 39 28 0 0 0 36 17 48 21 4 41 49 279 -34 36 10 33 36 25 4 35 35 44 37 0 9 1 0 0 35 37 51 21 4 45 48 280 -35 35 30 35 35 45 8 34 55 42 36 20 18 2 0 0 34 57 23 21 4 49 47 282 -36 34 50 6 35 4 40 34 15 9 35 39 54 3 0 0 34 16 24 21 4 54 46 283 -37 34 9 7 34 23 42 33 34 6 34 59 0 4 0 0 33 34 56 21 4 58 45 284 -38 33 27 38 33 42 15 32 52 34 34 17 36 5 0 0 32 53 1 21 5 2 44 285 -39 32 45 42 33 0 20 32 10 36 33 35 44 6 0 0 32 10 39 21 5 6 43 286 -41 32 3 20 32 17 59 31 28 11 32 53 25 7 0 0 31 27 53 21 5 11 42 287 -42 31 20 34 31 35 13 30 45 23 32 10 41 8 0 0 30 44 43 21 5 15 41 287 -43 30 37 24 30 52 4 30 2 12 31 27 33 9 0 0 30 1 12 21 5 19 40 288 -44 29 53 52 30 8 33 29 18 40 30 44 3 10 0 0 29 17 21 21 5 23 39 289 -45 29 10 1 29 24 42 28 34 48 30 0 12 11 0 0 28 33 12 21 5 26 38 290 -46 28 25 52 28 40 32 27 50 39 29 16 2 12 0 0 27 48 46 21 5 30 36 291 -47 27 41 26 27 56 6 27 6 14 28 31 36 13 0 0 27 4 6 21 5 34 35 291 -48 26 56 46 27 11 26 26 21 35 27 46 54 14 0 0 26 19 13 21 5 38 34 292 -50 26 11 54 26 26 33 25 36 44 27 1 59 15 0 0 25 34 9 21 5 41 33 293 -51 25 26 51 25 41 29 24 51 43 26 16 53 16 0 0 24 48 57 21 5 45 32 293 -52 24 41 39 24 56 16 24 6 34 25 31 38 17 0 0 24 3 37 21 5 48 31 294 -53 23 56 20 24 10 56 23 21 18 24 46 15 18 0 0 23 18 13 21 5 51 30 295 -54 23 10 56 23 25 31 22 35 58 24 0 46 19 0 0 22 32 46 21 5 55 29 295 -56 22 25 30 22 40 3 21 50 36 23 15 14 20 0 0 21 47 18 21 5 58 27 296 -57 21 40 3 21 54 34 21 5 13 22 29 41 21 0 0 21 1 51 21 6 1 26 296 -58 20 54 37 21 9 6 20 19 52 21 44 9 22 0 0 20 16 28 21 6 4 25 297 -59 20 9 15 20 23 41 19 34 34 20 58 39 23 0 0 19 31 9 21 6 6 24 297 -60 19 23 57 19 38 21 18 49 22 20 13 13 24 0 0 18 45 57 21 6 9 23 298 -62 18 38 47 18 53 9 18 4 17 19 27 54 25 0 0 18 0 55 21 6 11 21 298 -63 17 53 45 18 8 5 17 19 22 18 42 44 26 0 0 17 16 3 21 6 14 20 298 -64 17 8 54 17 23 11 16 34 38 17 57 44 27 0 0 16 31 23 21 6 16 19 299 -65 16 24 17 16 38 30 15 50 7 17 12 57 28 0 0 15 46 58 21 6 18 18 299 -67 15 39 53 15 54 4 15 5 50 16 28 23 29 0 0 15 2 50 21 6 20 17 299 -68 14 55 46 15 9 54 14 21 50 15 44 5 30 0 0 14 18 59 21 6 22 15 300 -69 14 11 56 14 26 1 13 38 8 15 0 5 31 0 0 13 35 27 21 6 24 14 300 -70 13 28 27 13 42 28 12 54 46 14 16 24 32 0 0 12 52 17 21 6 25 13 300 -71 12 45 18 12 59 16 12 11 45 13 33 4 33 0 0 12 9 29 21 6 27 12 300 -73 12 2 32 12 16 27 11 29 7 12 50 6 34 0 0 11 27 5 21 6 28 11 301 -74 11 20 10 11 34 1 10 46 54 12 7 32 35 0 0 10 45 7 21 6 29 9 301 -75 10 38 13 10 52 1 10 5 6 11 25 23 36 0 0 10 3 35 21 6 30 8 301 -76 9 56 44 10 10 28 9 23 45 10 43 41 37 0 0 9 22 32 21 6 31 7 301 -77 9 15 42 9 29 23 8 42 52 10 2 27 38 0 0 8 41 58 21 6 32 6 301 -78 8 35 10 8 48 46 8 2 28 9 21 42 39 0 0 8 1 54 21 6 32 5 302 -80 7 55 8 8 8 41 7 22 35 8 41 27 40 0 0 7 22 21 21 6 33 3 302 -81 7 15 37 7 29 6 .. .. .. 8 1 44 41 0 0 6 43 21 21 6 33 2 302 -82 6 36 39 6 50 4 .. .. .. 7 22 33 42 0 0 6 4 55 21 6 33 1 302 -83 5 58 14 6 11 36 .. .. .. 6 43 55 Uncertainty in time = +/- 2 secs Prediction of 2010 Mar 18.0 Data for the target star ------------------------ * name: TYC 2408-00609-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 40 45.5538 DE: +31 52 52.726 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .014, .015 ) * V mag [mag]: 9.3 * B mag [mag]: 9.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1719) Jens approx. diameter [km]: 19 approx. diameter ["]: .011 distance from Earth [AU]: 2.38600 * orbital information: orbit source: Preston date of fit: 2010 Mar 18 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 809 number of rejected observations: 21 time covered by the observations: 1948 Sep 10 - 2010 Feb 19 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.022, 99° remarks: * orbital elements for (1719) Jens : Mean anomaly = 62.55447511 deg Arg. of pericenter = 57.75767372 deg Long. of node = 323.51465814 deg Inclination = 14.28288974 deg Eccentricity = 0.22017495 Semimajor axis = 2.65752655 AU Perihelion dist = 2.07240577 AU Mag: H = 11.57, G = 0.15 Epoch of elements : MJD 55276.87700000 TDT (2010 Mar 21.877) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Mar 21 1719 Jens 21h 2.2m UT 9.3 5 40 45.554 31 52 52.73TYC 2408-00609-1 9.4 16.3 19 0.9 2.386 3.471 -13.40 -49.6214 31.885 -133.76 0.45 21.0360 0.11499 0.37913 11.99300 -3.63693 0.00567 0.00027 2000 60.9899352010 315.00000 57.757674323.514658 14.2828900.22017495 2.6575266 2.072405811.3 5.00.15 RATE 2.2750330 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.031 0.026 97 3.41 0.026 0 055273.0020100321_0609-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2010 Mar 18, 16:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org