IOTA/IOTA-ES occultation update for (7536) Fahrenheit / TYC 1762-01103-1 event on 2009 Dec 05, 01:24 UT Visible from Summary ------- On 2009 Dec 05 UT, the 25 km diameter asteroid (7536) Fahrenheit will occult a 9.7 mag star in the constellation Triangulum for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.8 mag to 16.5 mag (the magnitude of the asteroid) for at most 2.9 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: 12 * date and approx. time of event: 2009 Dec 05, 01:13 - 2009 Dec 05, 01:31 UT * magnitude of target star: 9.7 * magnitude drop [mag]: 6.8 * estimated maximum duration [s]: 2.9 * Moon: 90 % sunlit, 77° distance * Sun: 139° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 5.59 * 1 sigma uncertainty interval [seconds]: +/- 17.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .112 +/- .077) * 1 sigma uncertainty ellipse (major, minor, PA): ( .117", .068", 68° ) * approx speed of asteroid's shadow [km/s]: 8.5462 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1762-01103-1 by 7536 Fahrenheit on 2009 Dec 5 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 115 39 40 70 51 42 1 13 30 10 2 -8 115 22 55 71 9 41 115 55 51 70 33 6 111 37 43 73 59 18 118 15 3 65 50 34 118 39 12 75 54 47 1 13 46 15 4 -11 118 18 42 76 7 28 118 59 1 75 41 52 113 40 21 78 15 11 121 58 51 72 59 16 123 34 41 79 35 12 1 14 3 19 9 -14 123 11 14 79 46 6 123 57 13 79 24 9 117 37 17 81 38 33 127 15 49 77 10 15 132 4 35 82 30 7 1 14 19 22 17 -16 131 42 3 82 40 22 132 25 56 82 19 46 125 44 33 84 28 11 135 19 44 80 17 25 147 44 41 84 44 2 1 14 36 25 33 -17 147 39 52 84 54 2 147 48 52 84 34 0 145 35 49 86 42 14 148 2 43 82 37 45 175 40 22 85 59 25 1 14 52 27 60 -18 176 36 57 86 8 9 174 47 9 85 50 37 -166 30 46 87 37 38 167 28 43 84 7 0 -150 54 7 85 50 38 1 15 9 29 93 -20 -149 7 13 85 55 45 -152 37 14 85 45 18 -125 5 47 86 34 6 -167 59 54 84 32 41 -128 27 12 84 38 10 1 15 25 32 115 -21 -126 53 21 84 40 7 -130 0 13 84 35 59 -109 2 10 84 46 52 -145 59 32 83 57 25 -116 19 25 83 0 42 1 15 42 34 127 -21 -115 7 24 83 0 58 -117 31 33 83 0 16 -102 3 15 82 53 23 -130 50 0 82 44 15 -109 29 16 81 16 11 1 15 59 35 133 -22 -108 32 47 81 15 34 -110 26 2 81 16 40 - 98 24 44 81 1 5 -121 11 42 81 13 42 -105 18 54 79 30 44 1 16 15 37 137 -23 -104 32 49 79 29 39 -106 5 15 79 31 44 - 96 17 22 79 11 36 -114 57 35 79 36 25 -102 36 0 77 46 32 1 16 32 39 139 -24 -101 57 7 77 45 9 -103 15 6 77 47 49 - 94 58 21 77 25 11 -110 45 32 77 57 8 -100 45 8 76 4 17 1 16 48 40 140 -24 -100 11 27 76 2 45 -101 19 0 76 5 45 - 94 7 47 75 41 45 -107 49 6 76 17 58 - 99 27 25 74 24 12 1 17 5 42 141 -25 - 98 57 38 74 22 34 - 99 57 21 74 25 47 - 93 35 18 74 1 4 -105 41 45 74 39 53 - 98 32 0 72 46 18 1 17 21 43 141 -25 - 98 5 15 72 44 37 - 98 58 52 72 47 57 - 93 14 59 72 22 54 -104 7 43 73 3 16 - 97 52 14 71 10 28 1 17 38 45 141 -26 - 97 27 54 71 8 45 - 98 16 41 71 12 9 - 93 3 14 70 47 2 -102 57 10 71 28 15 - 97 23 52 69 36 35 1 17 55 46 141 -26 - 97 1 30 69 34 51 - 97 46 21 69 38 17 - 92 57 42 69 13 16 -102 3 45 69 54 53 - 97 4 3 68 4 31 1 18 11 47 140 -26 - 96 43 18 68 2 47 - 97 24 53 68 6 13 - 92 56 51 67 41 22 -101 23 11 68 23 7 - 96 50 48 66 34 6 1 18 28 49 139 -26 - 96 31 25 66 32 22 - 97 10 15 66 35 48 - 92 59 36 66 11 13 -100 52 28 66 52 51 - 96 42 42 65 5 13 1 18 44 50 139 -27 - 96 24 29 65 3 30 - 97 0 58 65 6 55 - 93 5 11 64 42 38 -100 29 30 65 24 1 - 96 38 43 63 37 45 1 19 1 51 138 -27 - 96 21 31 63 36 3 - 96 55 59 63 39 26 - 93 13 2 63 15 28 -100 12 43 63 56 31 - 96 38 6 62 11 35 1 19 17 52 136 -27 - 96 21 47 62 9 54 - 96 54 28 62 13 14 - 93 22 44 61 49 38 -100 0 57 62 30 15 - 96 40 15 60 46 36 1 19 34 53 135 -27 - 96 24 42 60 44 56 - 96 55 50 60 48 14 - 93 33 58 60 24 59 - 99 53 18 61 5 8 - 96 44 42 59 22 43 1 19 50 54 134 -27 - 96 29 51 59 21 4 - 96 59 37 59 24 20 - 93 46 29 59 1 26 - 99 49 7 59 41 6 - 96 51 8 57 59 49 1 20 7 55 132 -27 - 96 36 53 57 58 12 - 97 5 26 58 1 25 - 94 0 6 57 38 54 - 99 47 51 58 18 1 - 96 59 15 56 37 52 1 20 24 56 131 -27 - 96 45 32 56 36 16 - 97 12 59 56 39 26 - 94 14 40 56 17 16 - 99 49 4 56 55 51 - 97 8 49 55 16 44 1 20 40 57 129 -27 - 96 55 36 55 15 10 - 97 22 4 55 18 17 - 94 30 4 54 56 28 - 99 52 26 55 34 31 - 97 19 41 53 56 23 1 20 57 57 127 -27 - 97 6 55 53 54 50 - 97 32 29 53 57 55 - 94 46 12 53 36 27 - 99 57 41 54 13 56 - 97 31 41 52 36 43 1 21 13 58 125 -27 - 97 19 19 52 35 12 - 97 44 4 52 38 14 - 95 3 0 52 17 7 -100 4 34 52 54 3 - 97 44 42 51 17 42 1 21 30 59 123 -26 - 97 32 42 51 16 12 - 97 56 43 51 19 12 - 95 20 24 50 58 25 -100 12 57 51 34 48 - 97 58 38 49 59 16 1 21 46 59 121 -26 - 97 46 59 49 57 47 - 98 10 19 50 0 44 - 95 38 22 49 40 18 -100 22 38 50 16 7 - 98 13 25 48 41 21 1 22 3 60 119 -26 - 98 2 4 48 39 54 - 98 24 47 48 42 48 - 95 56 50 48 22 41 -100 33 31 48 57 58 - 98 28 58 47 23 54 1 22 20 60 117 -26 - 98 17 55 47 22 28 - 98 40 3 47 25 19 - 96 15 47 47 5 32 -100 45 29 47 40 16 - 98 45 15 46 6 52 1 22 36 61 115 -26 - 98 34 27 46 5 27 - 98 56 4 46 8 16 - 96 35 13 45 48 48 -100 58 28 46 23 0 - 99 2 13 44 50 12 1 22 53 61 112 -25 - 98 51 40 44 48 49 - 99 12 47 44 51 35 - 96 55 4 44 32 26 -101 12 23 45 6 5 - 99 19 49 43 33 51 1 23 9 62 110 -25 - 99 9 30 43 32 29 - 99 30 10 43 35 13 - 97 15 22 43 16 23 -101 27 10 43 49 29 - 99 38 3 42 17 47 1 23 26 62 107 -25 - 99 27 56 42 16 26 - 99 48 11 42 19 7 - 97 36 6 42 0 35 -101 42 47 42 33 10 - 99 56 52 41 1 56 1 23 42 62 105 -24 - 99 46 57 41 0 37 -100 6 48 41 3 15 - 97 57 14 40 45 2 -101 59 11 41 17 5 -100 16 16 39 46 17 1 23 59 62 102 -24 -100 6 32 39 44 59 -100 26 2 39 47 34 - 98 18 47 39 29 39 -102 16 20 40 1 10 -100 36 15 38 30 46 1 24 15 62 100 -23 -100 26 40 38 29 29 -100 45 50 38 32 2 - 98 40 46 38 14 25 -102 34 12 38 45 24 -100 56 47 37 15 21 1 24 32 62 97 -23 -100 47 22 37 14 6 -101 6 13 37 16 36 - 99 3 10 36 59 17 -102 52 48 37 29 44 -101 17 52 36 0 0 1 24 49 62 94 -22 -101 8 36 35 58 46 -101 27 10 36 1 14 - 99 26 0 35 44 12 -103 12 5 36 14 8 -101 39 32 34 44 40 1 25 5 62 92 -22 -101 30 24 34 43 27 -101 48 41 34 45 52 - 99 49 17 34 29 9 -103 32 4 34 58 32 -102 1 45 33 29 18 1 25 22 62 89 -21 -101 52 45 33 28 7 -102 10 47 33 30 29 -100 13 0 33 14 4 -103 52 44 33 42 55 -102 24 33 32 13 53 1 25 38 61 87 -21 -102 15 39 32 12 43 -102 33 28 32 15 2 -100 37 12 31 58 55 -104 14 5 32 27 14 -102 47 56 30 58 21 1 25 55 61 84 -20 -102 39 9 30 57 12 -102 56 44 30 59 29 -101 1 52 30 43 39 -104 36 7 31 11 26 -103 11 55 29 42 39 1 26 11 61 82 -20 -103 3 14 29 41 32 -103 20 37 29 43 46 -101 27 3 29 28 15 -104 58 52 29 55 28 -103 36 31 28 26 46 1 26 28 60 80 -19 -103 27 55 28 25 40 -103 45 8 28 27 52 -101 52 46 28 12 39 -105 22 20 28 39 18 -104 1 46 27 10 39 1 26 45 60 78 -18 -103 53 15 27 9 34 -104 10 17 27 11 43 -102 19 2 26 56 49 -105 46 31 27 22 54 -104 27 40 25 54 14 1 27 1 59 76 -18 -104 19 14 25 53 11 -104 36 7 25 55 16 -102 45 53 25 40 41 -106 11 29 26 6 11 -104 54 17 24 37 29 1 27 18 58 74 -17 -104 45 55 24 36 27 -105 2 39 24 38 30 -103 13 20 24 24 14 -106 37 13 24 49 8 -105 21 37 23 20 20 1 27 34 58 72 -16 -105 13 19 23 19 20 -105 29 56 23 21 20 -103 41 27 23 7 24 -107 3 46 23 31 40 -105 49 43 22 2 45 1 27 51 57 70 -16 -105 41 29 22 1 46 -105 57 58 22 3 43 -104 10 14 21 50 7 -107 31 11 22 13 46 -106 18 38 20 44 39 1 28 7 56 68 -15 -106 10 27 20 43 42 -106 26 51 20 45 36 -104 39 46 20 32 22 -107 59 29 20 55 20 -106 48 25 19 26 0 1 28 24 55 66 -14 -106 40 17 19 25 5 -106 56 35 19 26 55 -105 10 5 19 14 3 -108 28 44 19 36 20 -107 19 7 18 6 43 1 28 40 54 65 -13 -107 11 1 18 5 50 -107 27 15 18 7 36 -105 41 14 17 55 7 -108 59 0 18 16 40 -107 50 48 16 46 44 1 28 57 53 63 -12 -107 42 44 16 45 53 -107 58 54 16 47 35 -106 13 17 16 35 31 -109 30 20 16 56 18 -108 23 33 15 25 59 1 29 14 52 62 -11 -108 15 29 15 25 10 -108 31 37 15 26 48 -106 46 19 15 15 9 -110 2 48 15 35 8 -108 57 25 14 4 23 1 29 30 51 60 -11 -108 49 22 14 3 35 -109 5 28 14 5 9 -107 20 23 13 53 57 -110 36 30 14 13 5 -109 32 31 12 41 49 1 29 47 50 59 -10 -109 24 29 12 41 4 -109 40 34 12 42 34 -107 55 36 12 31 49 -111 11 33 12 50 3 -110 8 57 11 18 12 1 30 3 49 58 -9 -110 0 55 11 17 29 -110 17 0 11 18 55 -108 32 3 11 8 40 -111 48 1 11 25 56 -110 46 51 9 53 26 1 30 20 48 57 -8 -110 38 49 9 52 45 -110 54 55 9 54 5 -109 9 51 9 44 24 -112 26 4 10 0 37 -111 26 22 8 27 22 1 30 36 46 56 -6 -111 18 18 8 26 44 -111 34 26 8 27 59 -109 49 9 8 18 53 -113 5 51 8 33 57 -112 7 38 6 59 52 1 30 53 45 55 -5 -111 59 32 6 59 18 -112 15 44 7 0 26 -110 30 5 6 51 59 -113 47 32 7 5 48 -112 50 52 5 30 47 1 31 10 44 54 -4 -112 42 43 5 30 16 -112 59 1 5 31 17 -111 12 51 5 23 32 -114 31 21 5 35 59 -113 36 17 3 59 54 1 31 26 42 53 -3 -113 28 6 3 59 27 -113 44 30 4 0 21 -111 57 39 3 53 23 -115 17 32 4 4 18 -114 24 11 2 27 1 1 31 43 41 53 -2 -114 15 55 2 26 38 -114 32 28 2 27 23 -112 44 44 2 21 18 -116 6 24 2 30 30 -115 14 54 0 51 52 1 31 59 39 52 0 -115 6 32 0 51 33 -115 23 16 0 52 9 -113 34 25 0 47 3 -116 58 19 0 54 19 Uncertainty in time = +/- 21 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1762-01103-1 * constellation : Triangulum * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 44 04.1696 DE: +29 10 56.908 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .017 ) * V mag [mag]: 9.7 * B mag [mag]: 10.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (7536) Fahrenheit approx. diameter [km]: 25 approx. diameter ["]: .016 distance from Earth [AU]: 2.11600 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 496 number of rejected observations: 6 time covered by the observations: 1978 Mar 05 - 2007 Jun 14 1 sigma uncertainty ellipse (major, minor, PA): 0.116, 0.066, 68° remarks: * orbital elements for (7536) Fahrenheit : Mean anomaly = 92.10598533 deg Arg. of pericenter = 353.38180549 deg Long. of node = 303.87775289 deg Inclination = 12.62465824 deg Eccentricity = 0.15533711 Semimajor axis = 2.84687914 AU Perihelion dist = 2.40465316 AU Mag: H = 11.85, G = 0.15 Epoch of elements : MJD 55170.05900000 TDT (2009 Dec 05.059) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 5 7536 Fahrenheit 1h 24.3m UT 9.7 1 44 4.170 29 10 56.91TYC 1762-01103-1 10.3 16.5 25 2.9 2.116 -0.708 -17.76 -69.0332 29.188 156.56 -22.36 1.4043 -0.41193 0.21492 -2.23599 -4.27415 0.00390 0.00008 2000 90.04200620091125.00000353.381805303.877753 12.6246580.15533711 2.8468791 2.404653211.8 5.00.15 RATE 2.0518730 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.117 0.068 68 6.59 0.091 0 54581.5020091205_1103-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org