IOTA/IOTA-ES occultation update for (1727) Mette / HIP 43795 event on 2008 Jan 04, 15:37 UT Visible from Australia Summary ------- On 2008 Jan 04 UT, the 10 km diameter asteroid (1727) Mette will occult a 7.8 mag star in the constellation Hydra for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.4 mag to 14.2 mag (the magnitude of the asteroid) for at most 1.2 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: . The event at a glimpse ---------------------- * Rank: 25 * date and approx. time of event: 2008 Jan 04, 15:28 - 2008 Jan 04, 15:47 UT * magnitude of target star: 7.8 * magnitude drop [mag]: 6.4 * estimated maximum duration [s]: 1.2 * Moon: 14 % sunlit, 103° distance * Sun: 145° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 2.70 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .048 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .049", .032", 78° ) * approx speed of asteroid's shadow [km/s]: 8.5812 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 43795 by 1727 Mette on 2008 Jan 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 ' " Longitude Longitude Longitude Longitude 79 43 54 -72 0 0 15 28 0 1 78 10 80 33 39 78 49 54 84 16 33 ... .. .. 89 12 47 -71 0 0 15 28 2 4 69 8 89 38 37 88 46 24 91 50 0 86 12 44 94 54 16 -70 0 0 15 28 5 6 64 6 95 13 44 94 34 34 96 55 14 92 43 45 99 7 35 -69 0 0 15 28 9 8 60 4 99 23 46 98 51 16 100 48 59 97 20 44 102 29 26 -68 0 0 15 28 13 10 57 3 102 43 31 102 15 16 103 58 6 100 57 9 105 16 24 -67 0 0 15 28 18 11 54 1 105 28 59 105 3 45 106 35 56 103 54 16 107 37 46 -66 0 0 15 28 22 13 52 0 107 49 14 107 26 16 108 50 21 106 23 14 109 39 24 -65 0 0 15 28 27 14 51 -1 109 49 58 109 28 47 110 46 25 108 30 49 111 25 15 -64 0 0 15 28 33 15 49 -2 111 35 5 111 15 22 112 27 44 110 21 30 112 58 10 -63 0 0 15 28 38 16 48 -3 113 7 24 112 48 54 113 56 51 111 58 26 114 20 16 -62 0 0 15 28 44 17 46 -5 114 28 59 114 11 32 115 15 42 113 23 57 115 33 12 -61 0 0 15 28 50 19 46 -6 115 41 29 115 24 55 116 25 50 114 39 49 116 38 15 -60 0 0 15 28 56 20 45 -7 116 46 8 116 30 21 117 28 25 115 47 25 117 36 26 -59 0 0 15 29 3 21 44 -8 117 43 58 117 28 53 118 24 25 116 47 51 118 28 35 -58 0 0 15 29 9 22 43 -9 118 35 49 118 21 21 119 14 38 117 42 1 119 15 25 -57 0 0 15 29 16 23 43 -10 119 22 22 119 8 27 119 59 43 118 30 38 119 57 30 -56 0 0 15 29 23 24 42 -11 120 4 12 119 50 47 120 40 14 119 14 21 120 35 20 -55 0 0 15 29 31 25 42 -12 120 41 49 120 28 51 121 16 38 119 53 38 121 9 19 -54 0 0 15 29 38 26 42 -13 121 15 36 121 3 2 121 49 19 120 28 58 121 39 50 -53 0 0 15 29 46 27 41 -14 121 45 55 121 33 44 122 18 38 121 0 41 122 7 10 -52 0 0 15 29 54 28 41 -15 122 13 5 122 1 15 122 44 53 121 29 9 122 31 36 -51 0 0 15 30 2 29 41 -16 122 37 22 122 25 51 123 8 19 121 54 37 122 53 23 -50 0 0 15 30 10 30 41 -17 122 58 59 122 47 46 123 29 9 122 17 20 123 12 42 -49 0 0 15 30 19 30 41 -18 123 18 10 123 7 13 123 47 36 122 37 32 123 29 44 -48 0 0 15 30 28 31 41 -19 123 35 5 123 24 23 124 3 50 122 55 23 123 44 39 -47 0 0 15 30 37 32 41 -20 123 49 53 123 39 25 124 18 1 123 11 4 123 57 36 -46 0 0 15 30 46 33 41 -21 124 2 43 123 52 29 124 30 16 123 24 43 124 8 43 -45 0 0 15 30 55 34 42 -22 124 13 44 124 3 41 124 40 44 123 36 29 124 18 5 -44 0 0 15 31 4 35 42 -23 124 23 1 124 13 10 124 49 30 123 46 29 124 25 50 -43 0 0 15 31 14 36 42 -24 124 30 40 124 21 0 124 56 41 123 54 48 124 32 3 -42 0 0 15 31 24 36 43 -25 124 36 48 124 27 18 125 2 23 124 1 34 124 36 49 -41 0 0 15 31 34 37 43 -26 124 41 30 124 32 9 125 6 39 124 6 50 124 40 12 -40 0 0 15 31 44 38 43 -27 124 44 48 124 35 36 125 9 34 124 10 41 124 42 17 -39 0 0 15 31 55 39 44 -28 124 46 49 124 37 45 125 11 12 124 13 12 124 43 6 -38 0 0 15 32 5 40 44 -29 124 47 34 124 38 38 125 11 37 124 14 26 124 42 44 -37 0 0 15 32 16 40 45 -30 124 47 8 124 38 20 125 10 52 124 14 27 124 41 13 -36 0 0 15 32 27 41 45 -31 124 45 34 124 36 52 125 8 59 124 13 18 124 38 36 -35 0 0 15 32 38 42 46 -32 124 42 54 124 34 18 125 6 2 124 11 1 124 34 55 -34 0 0 15 32 49 42 47 -33 124 39 10 124 30 40 125 2 2 124 7 40 124 30 13 -33 0 0 15 33 0 43 47 -34 124 34 25 124 26 1 124 57 2 124 3 15 124 24 31 -32 0 0 15 33 11 44 48 -35 124 28 40 124 20 21 124 51 4 123 57 50 124 17 51 -31 0 0 15 33 23 44 49 -36 124 21 58 124 13 44 124 44 9 123 51 26 124 10 15 -30 0 0 15 33 35 45 50 -37 124 14 20 124 6 10 124 36 18 123 44 4 124 1 44 -29 0 0 15 33 47 45 51 -38 124 5 47 123 57 41 124 27 34 123 35 47 123 52 20 -28 0 0 15 33 58 46 52 -39 123 56 20 123 48 19 124 17 57 123 26 35 123 42 3 -27 0 0 15 34 11 47 52 -40 123 46 1 123 38 3 124 7 28 123 16 29 123 30 54 -26 0 0 15 34 23 47 53 -41 123 34 51 123 26 56 123 56 9 123 5 31 123 18 54 -25 0 0 15 34 35 48 54 -42 123 22 50 123 14 58 123 44 0 122 53 41 123 6 4 -24 0 0 15 34 48 48 56 -43 123 9 59 123 2 10 123 31 1 122 41 0 122 52 25 -23 0 0 15 35 0 48 57 -44 122 56 18 122 48 32 123 17 14 122 27 29 122 37 57 -22 0 0 15 35 13 49 58 -45 122 41 49 122 34 4 123 2 38 122 13 8 122 22 39 -21 0 0 15 35 26 49 59 -46 122 26 30 122 18 48 122 47 15 121 57 57 122 6 33 -20 0 0 15 35 38 50 60 -47 122 10 23 122 2 43 122 31 3 121 41 56 121 49 38 -19 0 0 15 35 51 50 61 -48 121 53 28 121 45 49 122 14 4 121 25 6 121 31 55 -18 0 0 15 36 4 50 63 -49 121 35 44 121 28 6 121 56 16 121 7 27 121 13 23 -17 0 0 15 36 17 50 64 -50 121 17 11 121 9 35 121 37 41 120 48 58 120 54 2 -16 0 0 15 36 31 51 65 -51 120 57 50 120 50 14 121 18 18 120 29 39 120 33 52 -15 0 0 15 36 44 51 66 -52 120 37 39 120 30 4 120 58 5 120 9 31 120 12 52 -14 0 0 15 36 57 51 68 -53 120 16 39 120 9 4 120 37 5 119 48 32 119 51 1 -13 0 0 15 37 11 51 69 -54 119 54 49 119 47 14 120 15 14 119 26 41 119 28 20 -12 0 0 15 37 24 51 70 -55 119 32 8 119 24 32 119 52 33 119 3 59 119 4 47 -11 0 0 15 37 38 51 72 -55 119 8 35 119 0 59 119 29 1 118 40 25 118 40 21 -10 0 0 15 37 52 51 73 -56 118 44 9 118 36 33 119 4 38 118 15 56 118 15 1 - 9 0 0 15 38 5 51 75 -57 118 18 50 118 11 13 118 39 21 117 50 34 117 48 47 - 8 0 0 15 38 19 51 76 -58 117 52 36 117 44 57 118 13 10 117 24 15 117 21 36 - 7 0 0 15 38 33 51 77 -59 117 25 26 117 17 46 117 46 4 116 56 59 116 53 27 - 6 0 0 15 38 47 50 79 -60 116 57 18 116 49 36 117 18 1 116 28 44 116 24 19 - 5 0 0 15 39 1 50 80 -61 116 28 11 116 20 27 116 48 59 115 59 29 115 54 9 - 4 0 0 15 39 14 50 81 -61 115 58 2 115 50 16 116 18 57 115 29 12 115 22 56 - 3 0 0 15 39 28 50 82 -62 115 26 51 115 19 2 115 47 53 114 57 50 114 50 38 - 2 0 0 15 39 42 49 84 -63 114 54 34 114 46 42 115 15 44 114 25 22 114 17 12 - 1 0 0 15 39 56 49 85 -64 114 21 9 114 13 14 114 42 29 113 51 45 113 42 35 0 0 0 15 40 10 48 86 -64 113 46 34 113 38 35 114 8 4 113 16 55 113 6 44 1 0 0 15 40 25 48 87 -65 113 10 46 113 2 42 113 32 26 112 40 51 Latitude Latitude Latitude Latitude 112 0 0 2 46 21 15 40 49 47 89 -66 2 52 41 2 40 1 3 26 34 2 5 27 111 0 0 4 16 32 15 41 11 46 91 -67 4 22 37 4 10 25 4 55 17 3 37 10 110 0 0 5 42 0 15 41 31 45 92 -67 5 47 53 5 36 5 6 19 26 5 3 59 109 0 0 7 3 6 15 41 50 44 93 -67 7 8 48 6 57 23 7 39 23 6 26 20 108 0 0 8 20 11 15 42 8 43 94 -68 8 25 43 8 14 38 8 55 23 7 44 31 107 0 0 9 33 30 15 42 25 42 95 -68 9 38 52 9 28 6 10 7 43 8 58 51 106 0 0 10 43 17 15 42 41 41 96 -68 10 48 31 10 38 3 11 16 38 10 9 34 105 0 0 11 49 46 15 42 57 40 97 -68 11 54 53 11 44 39 12 22 17 11 16 54 104 0 0 12 53 8 15 43 12 39 97 -67 12 58 8 12 48 9 13 24 54 12 21 3 103 0 0 13 53 34 15 43 26 38 98 -67 13 58 26 13 48 41 14 24 38 13 22 12 102 0 0 14 51 12 15 43 39 37 98 -67 14 55 59 14 46 26 15 21 37 14 20 30 101 0 0 15 46 12 15 43 52 36 98 -66 15 50 52 15 41 31 16 16 0 15 16 7 100 0 0 16 38 40 15 44 4 35 99 -65 16 43 15 16 34 4 17 7 55 16 9 10 99 0 0 17 28 44 15 44 16 34 99 -65 17 33 15 17 24 14 17 57 27 16 59 47 98 0 0 18 16 31 15 44 27 33 99 -64 18 20 57 18 12 5 18 44 45 17 48 4 97 0 0 19 2 6 15 44 37 32 99 -64 19 6 28 18 57 45 19 29 52 18 34 7 96 0 0 19 45 36 15 44 47 31 99 -63 19 49 53 19 41 18 20 12 56 19 18 3 95 0 0 20 27 4 15 44 57 30 99 -62 20 31 17 20 22 50 20 54 0 19 59 56 94 0 0 21 6 36 15 45 6 29 99 -61 21 10 46 21 2 26 21 33 9 20 39 51 93 0 0 21 44 16 15 45 15 28 99 -60 21 48 23 21 40 10 22 10 28 21 17 53 92 0 0 22 20 9 15 45 23 27 99 -60 22 24 12 22 16 5 22 46 1 21 54 7 91 0 0 22 54 18 15 45 31 26 99 -59 22 58 18 22 50 17 23 19 50 22 28 34 90 0 0 23 26 46 15 45 38 25 98 -58 23 30 43 23 22 48 23 52 1 23 1 21 89 0 0 23 57 37 15 45 45 24 98 -57 24 1 32 23 53 42 24 22 35 23 32 29 88 0 0 24 26 54 15 45 52 23 98 -56 24 30 46 24 23 1 24 51 37 24 2 1 87 0 0 24 54 39 15 45 58 22 98 -55 24 58 29 24 50 49 25 19 8 24 30 2 86 0 0 25 20 57 15 46 5 21 97 -55 25 24 44 25 17 8 25 45 11 24 56 33 85 0 0 25 45 47 15 46 10 20 97 -54 25 49 33 25 42 1 26 9 49 25 21 37 84 0 0 26 9 14 15 46 16 19 97 -53 26 12 58 26 5 30 26 33 4 25 45 16 83 0 0 26 31 20 15 46 21 18 96 -52 26 35 2 26 27 37 26 54 58 26 7 33 82 0 0 26 52 5 15 46 26 18 96 -51 26 55 46 26 48 24 27 15 33 26 28 29 81 0 0 27 11 32 15 46 30 17 96 -50 27 15 11 27 7 53 27 34 51 26 48 6 80 0 0 27 29 43 15 46 35 16 95 -50 27 33 21 27 26 6 27 52 53 27 6 26 79 0 0 27 46 40 15 46 39 15 95 -49 27 50 16 27 43 3 28 9 41 27 23 30 78 0 0 28 2 22 15 46 42 14 94 -48 28 5 58 27 58 47 28 25 16 27 39 21 77 0 0 28 16 53 15 46 46 13 94 -47 28 20 27 28 13 19 28 39 40 27 53 59 76 0 0 28 30 13 15 46 49 12 94 -46 28 33 46 28 26 39 28 52 53 28 7 25 75 0 0 28 42 23 15 46 52 11 93 -45 28 45 55 28 38 50 29 4 58 28 19 40 74 0 0 28 53 23 15 46 55 10 93 -44 28 56 55 28 49 52 29 15 53 28 30 46 73 0 0 29 3 16 15 46 57 10 92 -44 29 6 47 28 59 45 29 25 42 28 40 43 72 0 0 29 12 1 15 47 0 9 92 -43 29 15 32 29 8 31 29 34 23 28 49 33 71 0 0 29 19 40 15 47 2 8 91 -42 29 23 10 29 16 10 29 41 59 28 57 14 70 0 0 29 26 12 15 47 4 7 91 -41 29 29 41 29 22 43 29 48 28 29 3 49 69 0 0 29 31 39 15 47 5 6 90 -40 29 35 8 29 28 10 29 53 53 29 9 18 68 0 0 29 36 0 15 47 7 5 90 -39 29 39 28 29 32 31 29 58 12 29 13 40 67 0 0 29 39 15 15 47 8 4 89 -38 29 42 44 29 35 47 30 1 27 29 16 57 66 0 0 29 41 26 15 47 9 3 89 -38 29 44 54 29 37 57 .. .. .. 29 19 8 65 0 0 29 42 31 15 47 10 3 88 -37 29 45 59 29 39 2 .. .. .. 29 20 13 64 0 0 29 42 31 15 47 10 2 88 -36 29 46 0 29 39 2 .. .. .. 29 20 12 63 0 0 29 41 26 15 47 11 1 88 -35 29 44 54 29 37 57 .. .. .. 29 19 5 Data for the target star ------------------------ * name: HIP 43795 * constellation : Hydra * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 55 10.6072 DE: +02 37 43.304 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .022, .014 ) * V mag [mag]: 7.8 * B mag [mag]: 8.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1727) Mette approx. diameter [km]: 10 approx. diameter ["]: .018 distance from Earth [AU]: 0.78200 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 612 number of rejected observations: 16 time covered by the observations: 1955 Feb 23 - 2007 Dec 13 1 sigma uncertainty ellipse (major, minor, PA): 0.044, 0.029, 75° remarks: * orbital elements for (1727) Mette : Mean anomaly = 24.60462529 deg Arg. of pericenter = 312.93733222 deg Long. of node = 133.07632469 deg Inclination = 22.89492035 deg Eccentricity = 0.10216997 Semimajor axis = 1.85416110 AU Perihelion dist = 1.66472152 AU Mag: H = 12.61, G = 0.15 Epoch of elements : MJD 54469.65100000 TDT (2008 Jan 04.651) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 04 1727 Mette 15h 37.6m UT 7.8 8 55 10.607 2 37 43.30HIP 43795 8.7 14.2 10 1.2 0.782 -1.331 50.77 -204.223 2.614 -53.19 -22.74 15.6260 -.58584 -.23040 -1.76903 4.50887 -0.00227 0.00176 2000 20.837108220071226.00000312.937332133.076325 22.8949200.102169971.854161101.6647215212.65 0.15 RATE 3.9037579 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.049 0.032 77.9 3.700 0.048 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org