IOTA/IOTA-ES occultation update for (0) 2003 HE57 / UCAC2 26896129 event on 2009 Apr 10, 12:17 UT Visible from Summary ------- On 2009 Apr 10 UT, the 118 km diameter asteroid (0) 2003 HE57 will occult a 12.1 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 11.1 mag to 23.2 mag (the magnitude of the asteroid) for at most 4.8 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 0 * date and approx. time of event: 2009 Apr 10, 12:15 - 2009 Apr 10, 12:18 UT * magnitude of target star: 12.1 * magnitude drop [mag]: 11.1 * estimated maximum duration [s]: 4.8 * Moon: 99 % sunlit, 4° distance * Sun: 172° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 266 * 1 sigma uncertainty interval [path widths]: +/- 304.23 * 1 sigma uncertainty interval [seconds]: +/- 4719.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 3.780 +/- 2.128) * 1 sigma uncertainty ellipse (major, minor, PA): ( 4.209", 1.051", 117° ) * approx speed of asteroid's shadow [km/s]: 24.5446 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 26896129 by 0 2003 HE57 on 2009 Apr 10 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 - 40 38 46 -81 15 11 12 15 11 7 222 -1 ... .. .. .. .. .. - 59 42 57 -83 1 56 ... .. .. .. .. .. ... .. .. .. .. .. - 47 45 58 -83 1 57 12 15 14 9 230 -3 - 29 33 27 -80 14 54 - 69 26 2 -84 10 16 ... .. .. .. .. .. ... .. .. .. .. .. - 56 1 16 -84 26 50 12 15 17 11 238 -5 - 35 2 47 -82 31 46 - 81 5 24 -85 2 59 ... .. .. .. .. .. ... .. .. .. .. .. - 66 33 47 -85 35 43 12 15 20 12 249 -6 - 40 44 1 -84 15 42 - 95 0 29 -85 39 57 ... .. .. .. .. .. ... .. .. .. .. .. - 80 50 24 -86 29 3 12 15 23 13 263 -7 - 47 48 40 -85 41 59 -110 45 28 -86 0 1 ... .. .. .. .. .. ... .. .. .. .. .. -100 2 7 -87 3 35 12 15 26 14 282 -8 - 58 10 33 -86 55 1 -126 53 38 -86 3 2 ... .. .. .. .. .. ... .. .. .. .. .. -122 44 59 -87 14 51 12 15 29 15 305 -9 - 76 7 17 -87 53 32 -141 39 0 -85 51 10 ... .. .. .. .. .. ... .. .. .. .. .. -144 3 28 -87 3 6 12 15 32 16 326 -10 -108 59 37 -88 26 52 -154 1 5 -85 28 11 ... .. .. .. .. .. ... .. .. .. .. .. -160 27 11 -86 35 4 12 15 36 17 343 -11 -148 13 4 -88 19 13 -163 56 21 -84 57 52 ... .. .. .. .. .. ... .. .. .. .. .. -172 8 1 -85 58 8 12 15 39 18 355 -12 -172 32 56 -87 42 11 -171 49 23 -84 23 6 ... .. .. .. .. .. ... .. .. .. .. .. 179 29 3 -85 16 58 12 15 42 18 3 -13 174 32 47 -86 55 18 -178 9 0 -83 45 46 ... .. .. .. .. .. ... .. .. .. .. .. 173 14 27 -84 33 59 12 15 45 19 10 -14 166 51 45 -86 6 3 176 40 51 -83 7 0 ... .. .. .. .. .. ... .. .. .. .. .. 168 23 36 -83 50 23 12 15 48 20 15 -14 161 41 27 -85 16 45 172 22 19 -82 27 33 ... .. .. .. .. .. ... .. .. .. .. .. 164 29 12 -83 6 49 12 15 51 20 19 -15 157 52 41 -84 28 10 168 42 34 -81 47 51 ... .. .. .. .. .. ... .. .. .. .. .. 161 14 11 -82 23 34 12 15 54 21 22 -15 154 52 32 -83 40 32 165 32 24 -81 8 10 ... .. .. .. .. .. ... .. .. .. .. .. 158 27 36 -81 40 48 12 15 57 21 25 -16 152 23 43 -82 53 55 162 45 13 -80 28 40 ... .. .. .. .. .. ... .. .. .. .. .. 156 2 10 -80 58 36 12 16 0 22 28 -17 150 16 18 -82 8 19 160 16 9 -79 49 26 ... .. .. .. .. .. ... .. .. .. .. .. 153 52 53 -80 17 0 12 16 3 22 30 -17 148 24 10 -81 23 39 158 1 37 -79 10 33 ... .. .. .. .. .. ... .. .. .. .. .. 151 56 13 -79 36 0 12 16 6 23 33 -18 146 43 23 -80 39 54 155 58 53 -78 32 3 ... .. .. .. .. .. ... .. .. .. .. .. 150 9 34 -78 55 34 12 16 9 23 35 -18 145 11 17 -79 56 58 154 5 50 -77 53 55 ... .. .. .. .. .. ... .. .. .. .. .. 148 31 1 -78 15 43 12 16 12 23 36 -18 143 45 59 -79 14 50 152 20 53 -77 16 11 ... .. .. .. .. .. ... .. .. .. .. .. 146 59 8 -77 36 23 12 16 15 24 38 -19 142 26 8 -78 33 24 150 42 42 -76 38 50 ... .. .. .. .. .. ... .. .. .. .. .. 145 32 46 -76 57 34 12 16 18 24 40 -19 141 10 42 -77 52 39 149 10 17 -76 1 51 ... .. .. .. .. .. ... .. .. .. .. .. 144 11 3 -76 19 15 12 16 21 24 42 -20 139 58 54 -77 12 31 147 42 47 -75 25 15 ... .. .. .. .. .. ... .. .. .. .. .. 142 53 16 -75 41 22 12 16 24 24 43 -20 138 50 9 -76 32 57 146 19 31 -74 48 59 ... .. .. .. .. .. ... .. .. .. .. .. 141 38 51 -75 3 56 12 16 27 25 45 -20 137 43 58 -75 53 56 144 59 55 -74 13 4 ... .. .. .. .. .. ... .. .. .. .. .. 140 27 18 -74 26 53 12 16 30 25 46 -21 136 39 58 -75 15 24 143 43 31 -73 37 28 ... .. .. .. .. .. ... .. .. .. .. .. 139 18 15 -73 50 14 12 16 33 25 47 -21 135 37 48 -74 37 20 142 29 54 -73 2 10 ... .. .. .. .. .. ... .. .. .. .. .. 138 11 22 -73 13 56 12 16 36 25 49 -21 134 37 15 -73 59 42 141 18 44 -72 27 9 ... .. .. .. .. .. ... .. .. .. .. .. 137 6 22 -72 37 57 12 16 39 25 50 -21 133 38 3 -73 22 28 140 9 43 -71 52 25 ... .. .. .. .. .. ... .. .. .. .. .. 136 3 0 -72 2 18 12 16 42 26 51 -22 132 40 3 -72 45 35 139 2 36 -71 17 56 ... .. .. .. .. .. ... .. .. .. .. .. 135 1 5 -71 26 56 12 16 45 26 53 -22 131 43 3 -72 9 4 137 57 11 -70 43 41 ... .. .. .. .. .. ... .. .. .. .. .. 134 0 26 -70 51 50 12 16 48 26 54 -22 130 46 56 -71 32 51 136 53 14 -70 9 40 ... .. .. .. .. .. ... .. .. .. .. .. 133 0 53 -70 16 59 12 16 51 26 55 -22 129 51 33 -70 56 56 135 50 37 -69 35 52 ... .. .. .. .. .. ... .. .. .. .. .. 132 2 17 -69 42 21 12 16 54 26 56 -22 128 56 49 -70 21 17 134 49 10 -69 2 15 ... .. .. .. .. .. ... .. .. .. .. .. 131 4 31 -69 7 57 12 16 57 26 58 -22 128 2 37 -69 45 53 133 48 44 -68 28 49 ... .. .. .. .. .. ... .. .. .. .. .. 130 7 28 -68 33 45 12 17 0 26 59 -23 127 8 51 -69 10 43 132 49 12 -67 55 33 ... .. .. .. .. .. ... .. .. .. .. .. 129 11 1 -67 59 43 12 17 3 26 60 -23 126 15 27 -68 35 45 131 50 27 -67 22 27 ... .. .. .. .. .. ... .. .. .. .. .. 128 15 6 -67 25 51 12 17 6 26 61 -23 125 22 19 -68 0 58 130 52 24 -66 49 28 ... .. .. .. .. .. ... .. .. .. .. .. 127 19 37 -66 52 8 12 17 9 26 62 -23 124 29 24 -67 26 21 129 54 56 -66 16 37 ... .. .. .. .. .. ... .. .. .. .. .. 126 24 28 -66 18 33 12 17 12 26 64 -23 123 36 36 -66 51 53 128 57 58 -65 43 53 ... .. .. .. .. .. ... .. .. .. .. .. 125 29 36 -65 45 4 12 17 15 26 65 -23 122 43 52 -66 17 32 128 1 24 -65 11 15 ... .. .. .. .. .. ... .. .. .. .. .. 124 34 55 -65 11 42 12 17 18 26 66 -23 121 51 8 -65 43 19 127 5 11 -64 38 41 ... .. .. .. .. .. ... .. .. .. .. .. 123 40 21 -64 38 24 12 17 21 25 67 -23 120 58 20 -65 9 10 126 9 14 -64 6 12 ... .. .. .. .. .. ... .. .. .. .. .. 122 45 49 -64 5 10 12 17 24 25 68 -23 120 5 24 -64 35 6 125 13 27 -63 33 47 ... .. .. .. .. .. ... .. .. .. .. .. 121 51 17 -63 31 59 12 17 27 25 69 -23 119 12 16 -64 1 6 124 17 48 -63 1 24 ... .. .. .. .. .. ... .. .. .. .. .. 120 56 39 -62 58 50 12 17 30 25 70 -23 118 18 53 -63 27 7 123 22 11 -62 29 2 ... .. .. .. .. .. ... .. .. .. .. .. 120 1 52 -62 25 42 12 17 33 25 71 -22 117 25 9 -62 53 10 122 26 32 -61 56 41 ... .. .. .. .. .. ... .. .. .. .. .. 119 6 51 -61 52 34 12 17 36 25 72 -22 116 31 1 -62 19 12 121 30 48 -61 24 20 ... .. .. .. .. .. ... .. .. .. .. .. 118 11 32 -61 19 25 12 17 39 24 74 -22 115 36 25 -61 45 12 120 34 54 -60 51 58 ... .. .. .. .. .. ... .. .. .. .. .. 117 15 50 -60 46 13 12 17 42 24 75 -22 114 41 15 -61 11 9 119 38 46 -60 19 34 ... .. .. .. .. .. ... .. .. .. .. .. 116 19 41 -60 12 57 12 17 45 24 76 -22 113 45 27 -60 37 2 118 42 19 -59 47 6 ... .. .. .. .. .. ... .. .. .. .. .. 115 23 0 -59 39 37 12 17 48 23 77 -22 112 48 56 -60 2 49 117 45 29 -59 14 34 ... .. .. .. .. .. ... .. .. .. .. .. 114 25 41 -59 6 10 12 17 51 23 78 -21 111 51 34 -59 28 28 116 48 11 -58 41 57 ... .. .. .. .. .. ... .. .. .. .. .. 113 27 39 -58 32 35 12 17 54 23 79 -21 110 53 17 -58 53 57 115 50 20 -58 9 13 ... .. .. .. .. .. ... .. .. .. .. .. 112 28 48 -57 58 50 12 17 57 22 80 -21 109 53 56 -58 19 15 114 51 50 -57 36 20 ... .. .. .. .. .. ... .. .. .. .. .. 111 29 0 -57 24 53 12 18 0 22 81 -20 108 53 24 -57 44 18 113 52 36 -57 3 18 ... .. .. .. .. .. ... .. .. .. .. .. 110 28 8 -56 50 44 12 18 3 21 82 -20 107 51 30 -57 9 6 112 52 30 -56 30 4 ... .. .. .. .. .. ... .. .. .. .. .. 109 26 3 -56 16 18 12 18 6 21 83 -20 106 48 5 -56 33 33 111 51 25 -55 56 36 ... .. .. .. .. .. ... .. .. .. .. .. 108 22 35 -55 41 34 12 18 9 20 84 -19 105 42 56 -55 57 38 110 49 14 -55 22 53 ... .. .. .. .. .. ... .. .. .. .. .. 107 17 34 -55 6 28 12 18 12 20 86 -19 104 35 48 -55 21 17 109 45 47 -54 48 52 ... .. .. .. .. .. ... .. .. .. .. .. 106 10 45 -54 30 57 12 18 15 19 87 -18 103 26 24 -54 44 23 108 40 54 -54 14 30 ... .. .. .. .. .. ... .. .. .. .. .. 105 1 53 -53 54 57 12 18 18 19 88 -18 102 14 21 -54 6 53 107 34 22 -53 39 45 ... .. .. .. .. .. ... .. .. .. .. .. 103 50 39 -53 18 22 12 18 21 18 89 -17 100 59 13 -53 28 38 106 25 57 -53 4 32 ... .. .. .. .. .. ... .. .. .. .. .. 102 36 40 -52 41 8 12 18 24 17 90 -17 99 40 26 -52 49 30 105 15 22 -52 28 47 ... .. .. .. .. .. ... .. .. .. .. .. 101 19 26 -52 3 5 12 18 27 16 91 -16 98 17 14 -52 9 17 104 2 17 -51 52 24 ... .. .. .. .. .. ... .. .. .. .. .. 99 58 19 -51 24 5 12 18 30 16 93 -15 96 48 36 -51 27 44 102 46 15 -51 15 18 ... .. .. .. .. .. ... .. .. .. .. .. 98 32 31 -50 43 54 12 18 33 15 94 -14 95 13 6 -50 44 27 101 26 45 -50 37 19 ... .. .. .. .. .. ... .. .. .. .. .. 97 0 53 -50 2 16 12 18 36 14 95 -13 93 28 32 -49 58 54 100 3 3 -49 58 16 ... .. .. .. .. .. ... .. .. .. .. .. 95 21 46 -49 18 44 12 18 39 12 97 -12 91 31 22 -49 10 10 98 34 15 -49 17 56 ... .. .. .. .. .. ... .. .. .. .. .. 93 32 39 -48 32 41 12 18 42 11 98 -11 89 14 53 -48 16 32 96 59 0 -48 35 58 ... .. .. .. .. .. ... .. .. .. .. .. 91 29 12 -47 43 0 12 18 45 10 100 -10 86 23 26 -47 14 4 95 15 23 -47 51 53 ... .. .. .. .. .. ... .. .. .. .. .. 89 2 57 -46 47 32 12 18 48 8 102 -8 81 47 11 -45 45 9 93 20 15 -47 4 52 ... .. .. .. .. .. ... .. .. .. .. .. 85 51 21 -45 40 37 12 18 51 6 104 -6 ... .. .. .. .. .. 91 8 5 -46 13 32 ... .. .. .. .. .. ... .. .. .. .. .. Uncertainty in time = +/- 4886 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: UCAC2 26896129 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 41 33.7533 DE: -13 36 17.883 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .026 ) * V mag [mag]: 12.1 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (0) 2003 HE57 approx. diameter [km]: 118 approx. diameter ["]: .004 distance from Earth [AU]: 39.28400 * orbital information: orbit source: Preston date of fit: 2008 Mar 19 source of used astrometry: MPC (via Astdys) number of used observations: 15 number of rejected observations: 0 time covered by the observations: 2003 Apr 26 - 2007 Jul 12 1 sigma uncertainty ellipse (major, minor, PA): 4.209, 1.051, 117° remarks: * orbital elements for (0) 2003 HE57 : Mean anomaly = 25.28814514 deg Arg. of pericenter = 167.56190080 deg Long. of node = 10.02553435 deg Inclination = 8.87398981 deg Eccentricity = 0.10145001 Semimajor axis = 44.23761604 AU Perihelion dist = 39.74970967 AU Mag: H = 7.24, G = 0.00 Epoch of elements : MJD 54931.51200000 TDT (2009 Apr 10.512) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 10 0 2003 HE57 12h 17.0m UT 12.1 13 41 33.753-13 36 17.88UCAC2 26896129 0.0 23.2 118 4.8 39.284 -0.201 1.00 -177.7222 -13.605 -3.93 8.11 12.2833 -0.28997 -0.84813-13.10790 4.48408 -0.00066 0.00057 2000 25.2830802009 4 9.00000167.561901 10.025534 8.8739900.1014500144.237616039.7497095 7.2 5.00.00 RATE 0.0334980 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 4.209 1.051 117305.23 1.260 0 54545.5020090410_896129 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 06:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org