IOTA/IOTA-ES occultation update for (105) Artemis / TYC 0030-00485-1 event on 2008 Mar 05, 19:10 UT Visible from N Africa Summary ------- On 2008 Mar 05 UT, the 116 km diameter asteroid (105) Artemis will occult a 11.1 mag star in the constellation Cetus for observers along a path across N Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 14.3 mag (the magnitude of the asteroid) for at most 3.1 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: 95 * date and approx. time of event: 2008 Mar 05, 19:12 - 2008 Mar 05, 19:12 UT * midpoint of event [JD]: 2454531.29864583 * magnitude of target star: 11.1 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 3.1 * Moon: 5 % sunlit, 67° distance * Sun: 43° distance * rough path description: N Africa The occultation path -------------------- * approximate projected width [km]: 123 * 1 sigma uncertainty interval [path widths]: +/- 0.43 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .021 +/- .020) * 1 sigma uncertainty ellipse (major, minor, PA): ( .021", .020", 89° ) * approx speed of asteroid's shadow [km/s]: 37.2841 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0030-00485-1 by 105 Artemis on 2008 Mar 5 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 - 18 0 0 32 51 31 19 12 7 38 243 -1 32 17 38 33 25 31 31 48 35 33 54 51 - 17 0 0 33 2 6 19 12 8 37 244 -2 32 28 15 33 36 4 31 59 14 34 5 23 - 16 0 0 33 12 26 19 12 10 36 244 -2 32 38 37 33 46 23 32 9 37 34 15 40 - 15 0 0 33 22 31 19 12 11 35 245 -3 32 48 44 33 56 26 32 19 45 34 25 41 - 14 0 0 33 32 21 19 12 13 34 246 -4 32 58 35 34 6 13 32 29 38 34 35 27 - 13 0 0 33 41 55 19 12 14 33 246 -5 33 8 11 34 15 46 32 39 16 34 44 58 - 12 0 0 33 51 13 19 12 16 33 247 -6 33 17 31 34 25 2 32 48 38 34 54 13 - 11 0 0 34 0 17 19 12 17 32 248 -7 33 26 36 34 34 4 32 57 44 35 3 13 - 10 0 0 34 9 4 19 12 19 31 248 -7 33 35 25 34 42 50 33 6 35 35 11 57 - 9 0 0 34 17 36 19 12 20 30 249 -8 33 43 59 34 51 20 33 15 10 35 20 26 - 8 0 0 34 25 52 19 12 21 29 250 -9 33 52 17 34 59 35 33 23 29 35 28 39 - 7 0 0 34 33 53 19 12 23 28 250 -10 34 0 19 35 7 33 33 31 33 35 36 37 - 6 0 0 34 41 38 19 12 24 28 251 -11 34 8 6 35 15 17 33 39 20 35 44 19 - 5 0 0 34 49 7 19 12 25 27 252 -12 34 15 36 35 22 44 33 46 52 35 51 45 - 4 0 0 34 56 20 19 12 26 26 252 -12 34 22 51 35 29 56 33 54 8 35 58 55 - 3 0 0 35 3 18 19 12 27 25 253 -13 34 29 50 35 36 52 34 1 8 36 5 50 - 2 0 0 35 9 59 19 12 29 24 254 -14 34 36 33 35 43 32 34 7 52 36 12 29 - 1 0 0 35 16 25 19 12 30 23 254 -15 34 43 0 35 49 56 34 14 21 36 18 52 0 0 0 35 22 35 19 12 31 23 255 -16 34 49 11 35 56 5 34 20 33 36 24 59 1 0 0 35 28 28 19 12 32 22 255 -17 34 55 6 36 1 57 34 26 29 36 30 51 2 0 0 35 34 6 19 12 33 21 256 -17 35 0 45 36 7 34 34 32 9 36 36 26 3 0 0 35 39 28 19 12 33 20 257 -18 35 6 8 36 12 55 34 37 33 36 41 46 4 0 0 35 44 34 19 12 34 19 257 -19 35 11 15 36 18 0 34 42 41 36 46 50 5 0 0 35 49 24 19 12 35 19 258 -20 35 16 6 36 22 48 34 47 33 36 51 38 6 0 0 35 53 58 19 12 36 18 258 -21 35 20 41 36 27 21 34 52 8 36 56 10 7 0 0 35 58 16 19 12 37 17 259 -21 35 24 59 36 31 38 34 56 28 37 0 26 8 0 0 36 2 17 19 12 37 16 260 -22 35 29 2 36 35 39 35 0 31 37 4 26 9 0 0 36 6 3 19 12 38 15 260 -23 35 32 49 36 39 24 35 4 19 37 8 11 10 0 0 36 9 33 19 12 39 15 261 -24 35 36 19 36 42 53 35 7 50 37 11 39 11 0 0 36 12 47 19 12 39 14 262 -24 35 39 34 36 46 6 35 11 5 37 14 51 12 0 0 36 15 44 19 12 40 13 262 -25 35 42 32 36 49 3 35 14 4 37 17 48 13 0 0 36 18 26 19 12 41 12 263 -26 35 45 14 36 51 44 35 16 46 37 20 28 14 0 0 36 20 52 19 12 41 11 263 -27 35 47 40 36 54 9 35 19 13 37 22 53 15 0 0 36 23 1 19 12 42 11 264 -28 35 49 50 36 56 19 35 21 23 37 25 2 16 0 0 36 24 55 19 12 42 10 265 -28 35 51 44 36 58 12 35 23 18 37 26 54 17 0 0 36 26 32 19 12 42 9 265 -29 35 53 22 36 59 49 35 24 56 37 28 31 18 0 0 36 27 54 19 12 43 8 266 -30 35 54 44 37 1 10 35 26 18 37 29 52 19 0 0 36 28 59 19 12 43 7 266 -31 35 55 50 37 2 15 35 27 24 37 30 57 20 0 0 36 29 49 19 12 43 6 267 -31 35 56 39 37 3 4 35 28 13 37 31 46 21 0 0 36 30 22 19 12 44 6 268 -32 35 57 13 37 3 38 35 28 47 37 32 20 22 0 0 36 30 39 19 12 44 5 268 -33 35 57 30 37 3 55 35 29 4 37 32 37 23 0 0 36 30 41 19 12 44 4 269 -34 35 57 31 37 3 56 35 29 6 37 32 38 24 0 0 36 30 26 19 12 44 3 269 -34 35 57 17 37 3 42 35 28 51 37 32 24 25 0 0 36 29 55 19 12 44 2 270 -35 35 56 46 37 3 11 35 28 20 37 31 53 26 0 0 36 29 9 19 12 45 2 271 -36 35 55 59 37 2 25 35 27 33 37 31 7 27 0 0 36 28 6 19 12 45 1 271 -37 35 54 56 37 1 23 35 26 30 37 30 5 28 0 0 36 26 47 19 12 45 0 272 -37 35 53 37 37 0 4 .. .. .. 37 28 47 Uncertainty in time = +/- 1 secs [Prediction of 2008 Feb 2.0] Data for the target star ------------------------ * name: TYC 0030-00485-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 56 01.4655 DE: +01 20 32.694 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 11.1 * B mag [mag]: 11.6 * Apparent position with proper motion RA(deg): 29.1102391290 DE(deg): 1.3821861738 * Equation of equinoxes (radians) : 0.000045209405626 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (105) Artemis approx. diameter [km]: 116 approx. diameter ["]: .047 distance from Earth [AU]: 3.39400 * orbital information: orbit source: Preston date of fit: 2008 Jan 31 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 863 number of rejected observations: 91 time covered by the observations: 1915 Jun 20 - 2007 Dec 16 1 sigma uncertainty ellipse (major, minor, PA): 0.009, 0.007, 86° remarks: * orbital elements for (105) Artemis : Mean anomaly = 150.45020591 deg Arg. of pericenter = 56.52410327 deg Long. of node = 188.35091780 deg Inclination = 21.45879119 deg Eccentricity = 0.17614470 Semimajor axis = 2.37378907 AU Perihelion dist = 1.95565870 AU Mag: H = 8.62, G = 0.10 Epoch of elements : MJD 54530.79900000 TDT (2008 Mar 05.799) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 5 105 Artemis 19h 10.0m UT 11.1 1 56 1.465 1 20 32.69TYC 0030-00485-1 11.6 14.3 116 3.1 3.394 3.472 16.17 -62.4067 1.338 -104.67 -5.68 19.1675 -0.09712 0.31065 20.09691 6.24275 0.00394 0.00069 2000 150.2348842008 3 5.00000 56.524103188.350918 21.4587910.17614470 2.3737891 1.9556587 8.6 5.00.10 RATE 2.6948890 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.021 0.020 89 1.43 0.020 0 54498.5020080305_0485-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 03, 23:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org