IOTA/IOTA-ES occultation update for (29) Amphitrite / TYC 1806-00451-1 event on 2007 Nov 04, 23:00 UT Visible from India, Arabia, N Africa Summary ------- On 2007 Nov 04 UT, the 212 km diameter asteroid (29) Amphitrite will occult a 11.8 mag star in the constellation Taurus for observers along a path across India, Arabia, N Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.1 mag to 9.0 mag (the magnitude of the asteroid) for at most 22.6 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: 100 * date and approx. time of event: 2007 Nov 04, 22:49 - 2007 Nov 04, 23:11 UT * magnitude of target star: 11.8 * magnitude drop [mag]: 0.1 * estimated maximum duration [s]: 22.6 * Moon: 21 % sunlit, 110° distance * Sun: 162° distance * rough path description: India, Arabia, N Africa Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 212 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .024", .020", 82° ) * approx speed of asteroid's shadow [km/s]: 9.3676 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1806-00451-1 by 29 Amphitrite on 2007 Nov 04 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 - 67 0 0 - 2 10 24 23 11 46 0 62 -14 - 1 5 18 .. .. .. - 0 52 17 .. .. .. - 66 0 0 - 1 38 29 23 11 45 1 62 -15 - 0 33 23 - 2 43 38 - 0 20 23 - 2 56 40 - 65 0 0 - 1 6 35 23 11 45 2 62 -16 - 0 1 31 - 2 11 43 0 11 30 - 2 24 45 - 64 0 0 - 0 34 43 23 11 44 4 62 -17 0 30 20 - 1 39 50 0 43 20 - 1 52 52 - 63 0 0 - 0 2 55 23 11 43 5 62 -18 1 2 7 - 1 8 0 1 15 7 - 1 21 2 - 62 0 0 0 28 50 23 11 42 6 62 -19 1 33 50 - 0 36 13 1 46 50 - 0 49 15 - 61 0 0 1 0 30 23 11 41 7 62 -21 2 5 28 - 0 4 31 2 18 27 - 0 17 32 - 60 0 0 1 32 5 23 11 39 8 62 -22 2 37 0 0 27 6 2 49 59 0 14 6 - 59 0 0 2 3 33 23 11 37 9 62 -23 3 8 26 0 58 37 3 21 24 0 45 38 - 58 0 0 2 34 54 23 11 35 10 62 -24 3 39 43 1 30 1 3 52 41 1 17 2 - 57 0 0 3 6 7 23 11 32 11 62 -25 4 10 53 2 1 18 4 23 50 1 48 19 - 56 0 0 3 37 11 23 11 29 13 62 -26 4 41 53 2 32 25 4 54 49 2 19 28 - 55 0 0 4 8 5 23 11 26 14 62 -27 5 12 44 3 3 24 5 25 39 2 50 27 - 54 0 0 4 38 49 23 11 23 15 62 -28 5 43 23 3 34 12 5 56 18 3 21 16 - 53 0 0 5 9 22 23 11 20 16 62 -29 6 13 51 4 4 49 6 26 45 3 51 54 - 52 0 0 5 39 43 23 11 16 17 63 -30 6 44 7 4 35 15 6 57 0 4 22 20 - 51 0 0 6 9 51 23 11 12 18 63 -31 7 14 11 5 5 28 7 27 2 4 52 35 - 50 0 0 6 39 46 23 11 8 19 63 -32 7 44 0 5 35 28 7 56 51 5 22 36 - 49 0 0 7 9 26 23 11 3 20 63 -34 8 13 36 6 5 14 8 26 25 5 52 23 - 48 0 0 7 38 53 23 10 59 21 63 -35 8 42 56 6 34 46 8 55 45 6 21 56 - 47 0 0 8 8 4 23 10 54 22 63 -36 9 12 1 7 4 3 9 24 49 6 51 14 - 46 0 0 8 36 59 23 10 49 24 63 -37 9 40 50 7 33 4 9 53 36 7 20 16 - 45 0 0 9 5 37 23 10 44 25 63 -38 10 9 23 8 1 48 10 22 8 7 49 2 - 44 0 0 9 33 59 23 10 38 26 64 -39 10 37 38 8 30 16 10 50 22 8 17 31 - 43 0 0 10 2 3 23 10 33 27 64 -40 11 5 36 8 58 27 11 18 18 8 45 43 - 42 0 0 10 29 49 23 10 27 28 64 -41 11 33 15 9 26 20 11 45 56 9 13 37 - 41 0 0 10 57 16 23 10 21 29 64 -42 12 0 36 9 53 54 12 13 15 9 41 13 - 40 0 0 11 24 25 23 10 15 30 64 -43 12 27 37 10 21 9 12 40 16 10 8 30 - 39 0 0 11 51 14 23 10 8 31 64 -44 12 54 19 10 48 6 13 6 56 10 35 27 - 38 0 0 12 17 43 23 10 2 32 65 -45 13 20 41 11 14 42 13 33 17 11 2 5 - 37 0 0 12 43 52 23 9 55 33 65 -46 13 46 43 11 40 58 13 59 17 11 28 23 - 36 0 0 13 9 40 23 9 48 34 65 -47 14 12 24 12 6 53 14 24 57 11 54 20 - 35 0 0 13 35 7 23 9 41 35 65 -48 14 37 44 12 32 28 14 50 15 12 19 56 - 34 0 0 14 0 13 23 9 34 36 65 -49 15 2 42 12 57 41 15 15 12 12 45 11 - 33 0 0 14 24 57 23 9 27 37 66 -50 15 27 19 13 22 33 15 39 47 13 10 4 - 32 0 0 14 49 19 23 9 20 38 66 -51 15 51 34 13 47 3 16 4 0 13 34 35 - 31 0 0 15 13 19 23 9 12 39 66 -52 16 15 26 14 11 10 16 27 51 13 58 44 - 30 0 0 15 36 57 23 9 4 40 66 -53 16 38 56 14 34 55 16 51 19 14 22 30 - 29 0 0 16 0 11 23 8 56 41 67 -54 17 2 3 14 58 17 17 14 25 14 45 54 - 28 0 0 16 23 3 23 8 48 42 67 -55 17 24 47 15 21 17 17 37 7 15 8 55 - 27 0 0 16 45 31 23 8 40 43 67 -56 17 47 7 15 43 53 17 59 26 15 31 32 - 26 0 0 17 7 36 23 8 32 44 67 -57 18 9 5 16 6 5 18 21 22 15 53 46 - 25 0 0 17 29 17 23 8 24 45 68 -58 18 30 38 16 27 54 18 42 54 16 15 37 - 24 0 0 17 50 35 23 8 16 46 68 -58 18 51 48 16 49 19 19 4 3 16 37 4 - 23 0 0 18 11 28 23 8 7 47 68 -59 19 12 34 17 10 20 19 24 47 16 58 6 - 22 0 0 18 31 58 23 7 59 48 69 -60 19 32 56 17 30 57 19 45 8 17 18 45 - 21 0 0 18 52 3 23 7 50 49 69 -61 19 52 54 17 51 10 20 5 4 17 38 59 - 20 0 0 19 11 44 23 7 41 50 69 -62 20 12 28 18 10 59 20 24 37 17 58 49 - 19 0 0 19 31 1 23 7 32 51 69 -63 20 31 37 18 30 23 20 43 44 18 18 14 - 18 0 0 19 49 53 23 7 23 52 70 -64 20 50 22 18 49 22 21 2 28 18 37 15 - 17 0 0 20 8 21 23 7 14 53 70 -65 21 8 43 19 7 57 21 20 47 18 55 52 - 16 0 0 20 26 24 23 7 5 54 70 -66 21 26 38 19 26 7 21 38 41 19 14 3 - 15 0 0 20 44 2 23 6 56 55 71 -66 21 44 10 19 43 52 21 56 11 19 31 50 - 14 0 0 21 1 15 23 6 47 56 71 -67 22 1 16 20 1 13 22 13 16 19 49 12 - 13 0 0 21 18 4 23 6 38 57 71 -68 22 17 58 20 18 8 22 29 57 20 6 9 - 12 0 0 21 34 28 23 6 28 58 71 -69 22 34 15 20 34 39 22 46 13 20 22 40 - 11 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47 0 0 25 36 42 22 56 39 70 282 -56 26 34 42 24 38 39 26 46 18 24 27 3 48 0 0 25 28 37 22 56 29 70 282 -55 26 26 41 24 30 31 26 38 18 24 18 53 49 0 0 25 20 8 22 56 19 69 282 -54 26 18 16 24 21 58 26 29 54 24 10 19 50 0 0 25 11 14 22 56 10 68 283 -53 26 9 26 24 12 59 26 21 5 24 1 20 51 0 0 25 1 55 22 56 0 67 283 -52 26 0 12 24 3 36 26 11 51 23 51 56 52 0 0 24 52 11 22 55 50 66 283 -51 25 50 33 23 53 48 26 2 13 23 42 7 53 0 0 24 42 3 22 55 41 65 284 -51 25 40 29 23 43 35 25 52 10 23 31 53 54 0 0 24 31 30 22 55 31 64 284 -50 25 30 1 23 32 57 25 41 43 23 21 14 55 0 0 24 20 32 22 55 22 63 284 -49 25 19 8 23 21 54 25 30 51 23 10 10 56 0 0 24 9 9 22 55 12 63 285 -48 25 7 50 23 10 26 25 19 34 22 58 41 57 0 0 23 57 21 22 55 3 62 285 -47 24 56 7 22 58 33 25 7 53 22 46 47 58 0 0 23 45 8 22 54 53 61 285 -46 24 44 0 22 46 15 24 55 46 22 34 28 59 0 0 23 32 30 22 54 44 60 286 -45 24 31 28 22 33 31 24 43 15 22 21 43 60 0 0 23 19 28 22 54 35 59 286 -44 24 18 31 22 20 23 24 30 19 22 8 33 61 0 0 23 6 0 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8 13 17 6 4 47 8 26 7 5 51 56 105 0 0 6 39 14 22 49 24 14 297 0 7 43 32 5 34 52 7 56 24 5 21 59 106 0 0 6 9 10 22 49 21 13 297 1 7 13 34 5 4 43 7 26 26 4 51 49 107 0 0 5 38 53 22 49 18 12 297 2 6 43 22 4 34 21 6 56 15 4 21 26 108 0 0 5 8 23 22 49 16 11 297 3 6 12 57 4 3 46 6 25 51 3 50 50 109 0 0 4 37 41 22 49 13 9 297 4 5 42 19 3 32 59 5 55 14 3 20 2 110 0 0 4 6 47 22 49 11 8 298 5 5 11 30 3 2 1 5 24 26 2 49 4 111 0 0 3 35 43 22 49 10 7 298 6 4 40 30 2 30 53 4 53 27 2 17 55 112 0 0 3 4 30 22 49 8 6 298 7 4 9 20 1 59 36 4 22 17 1 46 36 113 0 0 2 33 7 22 49 7 5 298 8 3 38 0 1 28 9 3 50 59 1 15 9 114 0 0 2 1 36 22 49 6 4 298 9 3 6 33 0 56 35 3 19 32 0 43 35 115 0 0 1 29 57 22 49 5 3 298 11 2 34 57 0 24 54 2 47 57 0 11 53 116 0 0 0 58 13 22 49 4 2 298 12 2 3 15 - 0 6 53 2 16 15 - 0 19 55 117 0 0 0 26 22 22 49 4 0 298 13 1 31 27 .. .. .. 1 44 27 .. .. .. Data for the target star ------------------------ * name: TYC 1806-00451-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 32 59.3720 DE: +27 49 08.127 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .017 ) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29) Amphitrite approx. diameter [km]: 212 approx. diameter ["]: .208 distance from Earth [AU]: 1.40700 * orbital information: orbit source: Preston date of fit: 2007 Oct 23 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1380 number of rejected observations: 179 time covered by the observations: 1900 Jul 28 - 2007 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.012, 74° remarks: * orbital elements for (29) Amphitrite : Mean anomaly = 352.67133823 deg Arg. of pericenter = 63.32216499 deg Long. of node = 356.49632367 deg Inclination = 6.09569458 deg Eccentricity = 0.07280057 Semimajor axis = 2.55473222 AU Perihelion dist = 2.36874626 AU Mag: H = 5.84, G = 0.20 Epoch of elements : MJD 54408.95900000 TDT (2007 Nov 04.959) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 04 29 Amphitrite 23h 0.4m UT 11.8 3 32 59.372 27 49 8.13TYC 1806-00451-1 12.2 9.0 212 22.6 1.407 -2.492 -0.81 24.338 27.819 190.80 -15.48 23.0069 .00053 -.02012 -5.28576 -0.12896 -0.00132 -0.00115 2000 350.50889020071027.00000 63.322165356.496324 6.0956950.072800572.554732222.368746265.855 0.20 RATE 2.4137150 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.024 0.020 81.9 1.100 0.021 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 23, 22:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org