IOTA/IOTA-ES occultation update for (5833) Peterson / TYC 7789-01217-1 event on 2009 May 08, 13:43 UT Visible from Summary ------- On 2009 May 08 UT, the 32 km diameter asteroid (5833) Peterson will occult a 10.0 mag star in the constellation Centaurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.1 mag to 16.1 mag (the magnitude of the asteroid) for at most 2.3 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: 17 * date and approx. time of event: 2009 May 08, 13:36 - 2009 May 08, 13:51 UT * magnitude of target star: 10.0 * magnitude drop [mag]: 6.1 * estimated maximum duration [s]: 2.3 * Moon: 99 % sunlit, 21° distance * Sun: 152° distance * rough path description: Additional comments ------------------- close double star The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 4.06 * 1 sigma uncertainty interval [seconds]: +/- 13.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .113 +/- .079) * 1 sigma uncertainty ellipse (major, minor, PA): ( .119", .069", 113° ) * approx speed of asteroid's shadow [km/s]: 13.7811 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7789-01217-1 by 5833 Peterson on 2009 May 8 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 72 4 36 31 0 0 13 51 21 1 138 0 72 18 25 71 50 46 74 10 9 ... .. .. 73 6 50 30 0 0 13 51 21 2 139 -1 73 20 28 72 53 12 75 10 41 ... .. .. 74 7 56 29 0 0 13 51 20 3 139 -2 74 21 23 73 54 29 76 10 12 ... .. .. 75 8 0 28 0 0 13 51 19 5 140 -4 75 21 16 74 54 42 77 8 46 73 6 29 76 7 5 27 0 0 13 51 18 6 140 -5 76 20 12 75 53 57 78 6 29 74 7 3 77 5 18 26 0 0 13 51 17 7 140 -6 77 18 17 76 52 19 79 3 26 75 6 37 78 2 44 25 0 0 13 51 16 9 141 -7 78 15 35 77 49 53 79 59 41 76 5 18 78 59 26 24 0 0 13 51 14 10 141 -8 79 12 9 78 46 42 80 55 18 77 3 10 79 55 29 23 0 0 13 51 12 11 142 -10 80 8 5 79 42 52 81 50 20 78 0 17 80 50 56 22 0 0 13 51 10 12 142 -11 81 3 26 80 38 26 82 44 52 78 56 44 81 45 52 21 0 0 13 51 7 14 142 -12 81 58 16 81 33 27 83 38 57 79 52 34 82 40 19 20 0 0 13 51 5 15 143 -13 82 52 38 82 28 0 84 32 38 80 47 52 83 34 22 19 0 0 13 51 2 16 143 -14 83 46 36 83 22 7 85 25 58 81 42 40 84 28 3 18 0 0 13 50 59 18 143 -15 84 40 13 84 15 53 86 19 1 82 37 3 85 21 25 17 0 0 13 50 55 19 144 -17 85 33 31 85 9 19 87 11 49 83 31 3 86 14 32 16 0 0 13 50 52 20 144 -18 86 26 35 86 2 29 88 4 26 84 24 43 87 7 26 15 0 0 13 50 48 22 144 -19 87 19 26 86 55 27 88 56 53 85 18 7 88 0 10 14 0 0 13 50 44 23 144 -20 88 12 7 87 48 14 89 49 15 86 11 17 88 52 48 13 0 0 13 50 40 24 145 -21 89 4 42 88 40 53 90 41 33 87 4 17 89 45 20 12 0 0 13 50 35 25 145 -22 89 57 13 89 33 28 91 33 50 87 57 8 90 37 51 11 0 0 13 50 31 27 145 -24 90 49 43 90 26 0 92 26 8 88 49 54 91 30 23 10 0 0 13 50 26 28 145 -25 91 42 13 91 18 33 93 18 31 89 42 38 92 22 58 9 0 0 13 50 21 29 145 -26 92 34 48 92 11 9 94 11 1 90 35 21 93 15 40 8 0 0 13 50 15 31 146 -27 93 27 29 93 3 51 95 3 41 91 28 7 94 8 29 7 0 0 13 50 10 32 146 -28 94 20 18 93 56 41 95 56 32 92 20 58 95 1 30 6 0 0 13 50 4 33 146 -30 95 13 20 94 49 41 96 49 38 93 13 57 95 54 45 5 0 0 13 49 58 35 146 -31 96 6 35 95 42 55 97 43 1 94 7 6 96 48 16 4 0 0 13 49 52 36 146 -32 97 0 8 96 36 25 98 36 44 95 0 29 97 42 6 3 0 0 13 49 45 37 147 -33 97 53 59 97 30 14 99 30 51 95 54 6 98 36 18 2 0 0 13 49 39 38 147 -34 98 48 14 98 24 24 100 25 22 96 48 2 99 30 55 1 0 0 13 49 32 40 147 -35 99 42 53 99 18 59 101 20 22 97 42 19 100 26 0 0 0 0 13 49 25 41 147 -37 100 38 0 100 14 0 102 15 54 98 37 0 101 21 35 - 1 0 0 13 49 17 42 147 -38 101 33 38 101 9 32 103 12 0 99 32 8 Latitude Latitude Latitude Latitude 102 0 0 - 1 41 7 13 49 12 43 147 -39 - 1 28 13 - 1 54 1 0 17 7 - 3 38 12 103 0 0 - 2 44 45 13 49 4 45 148 -40 - 2 31 55 - 2 57 34 - 0 47 13 - 4 41 8 104 0 0 - 3 47 36 13 48 56 46 148 -41 - 3 34 51 - 4 0 20 - 1 50 48 - 5 43 18 105 0 0 - 4 49 39 13 48 47 48 148 -42 - 4 36 59 - 5 2 18 - 2 53 35 - 6 44 37 106 0 0 - 5 50 51 13 48 39 49 148 -44 - 5 38 15 - 6 3 25 - 3 55 33 - 7 45 5 107 0 0 - 6 51 10 13 48 30 50 149 -45 - 6 38 39 - 7 3 39 - 4 56 38 - 8 44 39 108 0 0 - 7 50 34 13 48 21 52 149 -46 - 7 38 9 - 8 2 58 - 5 56 49 - 9 43 17 109 0 0 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52 56 -32 16 38 -35 9 49 149 0 0 -34 3 32 13 42 40 77 242 -73 -33 54 5 -34 12 58 -32 37 9 -35 29 29 150 0 0 -34 22 51 13 42 33 76 244 -73 -34 13 27 -34 32 15 -32 56 52 -35 48 25 151 0 0 -34 41 25 13 42 26 75 246 -72 -34 32 4 -34 50 47 -33 15 50 -36 6 36 152 0 0 -34 59 16 13 42 19 75 247 -72 -34 49 56 -35 8 35 -33 34 3 -36 24 4 153 0 0 -35 16 22 13 42 13 74 249 -72 -35 7 5 -35 25 39 -33 51 31 -36 40 49 154 0 0 -35 32 45 13 42 6 74 250 -72 -35 23 30 -35 42 0 -34 8 15 -36 56 52 155 0 0 -35 48 26 13 41 59 73 251 -71 -35 39 13 -35 57 38 -34 24 15 -37 12 12 156 0 0 -36 3 24 13 41 53 72 252 -71 -35 54 14 -36 12 34 -34 39 33 -37 26 52 157 0 0 -36 17 41 13 41 47 72 253 -71 -36 8 32 -36 26 49 -34 54 8 -37 40 51 158 0 0 -36 31 17 13 41 40 71 254 -70 -36 22 10 -36 40 23 -35 8 1 -37 54 9 159 0 0 -36 44 12 13 41 34 70 255 -70 -36 35 7 -36 53 16 -35 21 13 -38 6 48 160 0 0 -36 56 27 13 41 28 69 255 -70 -36 47 24 -37 5 29 -35 33 44 -38 18 47 161 0 0 -37 8 2 13 41 22 69 256 -69 -36 59 0 -37 17 3 -35 45 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5 -172 0 0 -38 25 42 13 38 55 49 251 -54 -38 16 51 -38 34 32 -37 4 52 -39 46 10 -171 0 0 -38 20 4 13 38 50 48 251 -53 -38 11 12 -38 28 55 -36 59 6 -39 40 40 -170 0 0 -38 13 48 13 38 46 48 250 -52 -38 4 55 -38 22 40 -36 52 42 -39 34 32 -169 0 0 -38 6 55 13 38 41 47 250 -52 -37 58 1 -38 15 48 -36 45 39 -39 27 49 -168 0 0 -37 59 24 13 38 36 46 250 -51 -37 50 29 -38 8 18 -36 37 58 -39 20 28 -167 0 0 -37 51 14 13 38 32 45 249 -50 -37 42 19 -38 0 10 -36 29 37 -39 12 29 -166 0 0 -37 42 27 13 38 27 45 249 -50 -37 33 30 -37 51 24 -36 20 37 -39 3 53 -165 0 0 -37 33 0 13 38 23 44 248 -49 -37 24 2 -37 41 58 -36 10 58 -38 54 39 -164 0 0 -37 22 54 13 38 18 43 248 -48 -37 13 54 -37 31 54 -36 0 38 -38 44 47 -163 0 0 -37 12 9 13 38 14 42 247 -48 -37 3 7 -37 21 10 -35 49 38 -38 34 16 -162 0 0 -37 0 43 13 38 9 41 247 -47 -36 51 40 -37 9 46 -35 37 57 -38 23 5 -161 0 0 -36 48 37 13 38 5 41 246 -46 -36 39 32 -36 57 42 -35 25 35 -38 11 15 -160 0 0 -36 35 50 13 38 0 40 246 -46 -36 26 43 -36 44 56 -35 12 30 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.. .. .. .. .. Uncertainty in time = +/- 17 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 7789-01217-1 * constellation : Centaurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 44 02.0691 DE: -39 12 52.587 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .024 ) * V mag [mag]: 10.0 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5833) Peterson approx. diameter [km]: 32 approx. diameter ["]: .017 distance from Earth [AU]: 2.65100 * orbital information: orbit source: Preston date of fit: 2008 Apr 24 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 646 number of rejected observations: 4 time covered by the observations: 1972 Oct 05 - 2008 Mar 13 1 sigma uncertainty ellipse (major, minor, PA): 0.117, 0.065, 114° remarks: * orbital elements for (5833) Peterson : Mean anomaly = 145.34024524 deg Arg. of pericenter = 127.28849273 deg Long. of node = 306.94914262 deg Inclination = 19.32458029 deg Eccentricity = 0.02859599 Semimajor axis = 3.49228481 AU Perihelion dist = 3.39241947 AU Mag: H = 10.95, G = 0.15 Epoch of elements : MJD 54959.57200000 TDT (2009 May 08.572) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 May 8 5833 Peterson 13h 43.8m UT 10.0 13 44 2.069-39 12 52.59TYC 7789-01217-1 10.4 16.1 32 2.3 2.651 -1.885 13.63 133.5468 -39.218 -26.82 17.22 13.7294 0.09385 0.15117 -6.60553 4.10740 0.00184 0.00196 2000 143.8946642009 429.00000127.288493306.949143 19.3245800.02859599 3.4922848 3.392419510.7 5.00.15 RATE 1.5102180 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.119 0.069 113 5.06 0.068 0 54581.5020090508_1217-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 06:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org