IOTA/IOTA-ES occultation update for (2893) Peiroos / UCAC2 33404077 event on 2008 Jan 07, 14:04 UT Visible from N Canada, Alaska Summary ------- On 2008 Jan 07 UT, the 87 km diameter asteroid (2893) Peiroos will occult a 11.1 mag star in the constellation Virgo for observers along a path across N Canada, Alaska. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.9 mag to 17.0 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: 23 * date and approx. time of event: 2008 Jan 07, 14:01 - 2008 Jan 07, 14:05 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 5.9 * estimated maximum duration [s]: 4.8 * Moon: 1 % sunlit, 75° distance * Sun: 84° distance * rough path description: N Canada, Alaska The occultation path -------------------- * approximate projected width [km]: 277 * 1 sigma uncertainty interval [path widths]: +/- 2.88 * 1 sigma uncertainty interval [seconds]: +/- 18.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .090 +/- .065) * 1 sigma uncertainty ellipse (major, minor, PA): ( .094", .059", 112° ) * approx speed of asteroid's shadow [km/s]: 18.1251 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 33404077 by 2893 Peiroos on 2008 Jan 07 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 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. -173 14 16 65 37 34 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. -171 25 21 65 47 4 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. 158 49 30 69 20 22 ... .. .. .. .. .. -169 39 52 65 56 12 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. 164 1 14 69 47 50 ... .. .. .. .. .. -167 57 22 66 5 0 154 39 18 70 15 49 14 1 48 2 84 -42 ... .. .. .. .. .. 167 59 21 70 9 9 ... .. .. .. .. .. -166 17 29 66 13 30 161 20 33 70 50 50 14 1 51 5 90 -41 ... .. .. .. .. .. 171 22 9 70 27 26 ... .. .. .. .. .. -164 39 53 66 21 44 165 51 24 71 15 4 14 1 54 6 94 -40 ... .. .. .. .. .. 174 23 19 70 43 47 ... .. .. .. .. .. -163 4 19 66 29 43 169 34 4 71 35 12 14 1 57 7 98 -40 156 40 8 71 49 16 177 9 37 70 58 47 ... .. .. .. .. .. -161 30 34 66 37 27 172 49 42 71 52 57 14 2 0 8 101 -39 162 24 57 72 19 56 179 45 0 71 12 44 ... .. .. .. .. .. -159 58 25 66 44 58 175 47 40 72 9 4 14 2 3 9 104 -38 166 43 0 72 43 18 -177 48 0 71 25 51 ... .. .. .. .. .. -158 27 43 66 52 17 178 33 1 72 24 0 14 2 6 10 107 -38 170 21 47 73 3 15 -175 27 38 71 38 16 ... .. .. .. .. .. -156 58 20 66 59 25 -178 51 4 72 37 59 14 2 9 11 109 -37 173 37 10 73 21 4 -173 12 40 71 50 7 ... .. .. .. .. .. -155 30 6 67 6 21 -176 22 31 72 51 11 14 2 12 11 112 -36 176 36 46 73 37 25 -171 2 9 72 1 26 ... .. .. .. .. .. -154 2 55 67 13 6 -173 59 51 73 3 44 14 2 15 12 114 -36 179 24 59 73 52 37 -168 55 19 72 12 18 ... .. .. .. .. .. -152 36 42 67 19 42 -171 41 57 73 15 44 14 2 18 12 116 -35 -177 55 25 74 6 55 -166 51 37 72 22 46 ... .. .. .. .. .. -151 11 20 67 26 8 -169 27 59 73 27 14 14 2 21 13 119 -35 -175 22 33 74 20 27 -164 50 34 72 32 51 ... .. .. .. .. .. -149 46 45 67 32 24 -167 17 16 73 38 17 14 2 24 13 121 -34 -172 55 1 74 33 22 -162 51 46 72 42 36 ... .. .. .. .. .. -148 22 51 67 38 31 -165 9 18 73 48 57 14 2 27 14 123 -33 -170 31 48 74 45 43 -160 54 54 72 52 3 ... .. .. .. .. .. -146 59 36 67 44 30 -163 3 38 73 59 14 14 2 30 14 125 -33 -168 12 6 74 57 35 -158 59 42 73 1 11 ... .. .. .. .. .. -145 36 54 67 50 20 -160 59 53 74 9 11 14 2 33 14 127 -32 -165 55 17 75 9 0 -157 5 54 73 10 3 ... .. .. .. .. .. -144 14 43 67 56 2 -158 57 45 74 18 49 14 2 36 15 129 -32 -163 40 50 75 20 1 -155 13 18 73 18 40 ... .. .. .. .. .. -142 52 59 68 1 36 -156 56 59 74 28 9 14 2 39 15 131 -31 -161 28 19 75 30 39 -153 21 44 73 27 1 ... .. .. .. .. .. -141 31 38 68 7 2 -154 57 19 74 37 13 14 2 41 15 133 -31 -159 17 22 75 40 57 -151 31 1 73 35 8 ... .. .. .. .. .. -140 10 39 68 12 20 -152 58 34 74 45 59 14 2 44 16 135 -30 -157 7 41 75 50 54 -149 41 1 73 43 1 ... .. .. .. .. .. -138 49 59 68 17 30 -151 0 34 74 54 31 14 2 47 16 138 -30 -154 59 0 76 0 33 -147 51 36 73 50 41 ... .. .. .. .. .. -137 29 35 68 22 33 -149 3 8 75 2 47 14 2 50 16 140 -29 -152 51 4 76 9 54 -146 2 38 73 58 8 ... .. .. .. .. .. -136 9 24 68 27 29 -147 6 7 75 10 49 14 2 53 16 142 -29 -150 43 41 76 18 58 -144 14 2 74 5 22 ... .. .. .. .. .. -134 49 25 68 32 17 -145 9 24 75 18 36 14 2 56 16 144 -28 -148 36 39 76 27 45 -142 25 41 74 12 23 ... .. .. .. .. .. -133 29 35 68 36 59 -143 12 51 75 26 9 14 2 59 17 146 -28 -146 29 49 76 36 16 -140 37 30 74 19 12 ... .. .. .. .. .. -132 9 52 68 41 32 -141 16 22 75 33 29 14 3 2 17 148 -27 -144 23 1 76 44 30 -138 49 24 74 25 49 ... .. .. .. .. .. -130 50 15 68 45 59 -139 19 51 75 40 35 14 3 5 17 150 -27 -142 16 6 76 52 29 -137 1 17 74 32 14 ... .. .. .. .. .. -129 30 41 68 50 19 -137 23 11 75 47 27 14 3 8 17 152 -26 -140 8 57 77 0 13 -135 13 6 74 38 28 ... .. .. .. .. .. -128 11 9 68 54 32 -135 26 17 75 54 6 14 3 11 17 154 -26 -138 1 26 77 7 41 -133 24 46 74 44 29 ... .. .. .. .. .. -126 51 37 68 58 38 -133 29 4 76 0 31 14 3 14 17 156 -25 -135 53 26 77 14 53 -131 36 13 74 50 19 ... .. .. .. .. .. -125 32 4 69 2 36 -131 31 28 76 6 44 14 3 17 17 158 -25 -133 44 52 77 21 50 -129 47 24 74 55 56 ... .. .. .. .. .. -124 12 27 69 6 28 -129 33 23 76 12 42 14 3 20 18 160 -24 -131 35 35 77 28 32 -127 58 14 75 1 22 125 27 46 84 30 52 -122 52 45 69 10 13 -127 34 45 76 18 27 14 3 23 18 162 -24 -129 25 32 77 34 57 -126 8 39 75 6 36 128 10 49 85 14 28 -121 32 57 69 13 51 -125 35 30 76 23 59 14 3 26 18 164 -23 -127 14 37 77 41 7 -124 18 38 75 11 38 128 58 55 85 50 15 -120 13 0 69 17 22 -123 35 34 76 29 17 14 3 29 18 166 -23 -125 2 43 77 47 1 -122 28 5 75 16 28 128 11 59 86 21 51 -118 52 54 69 20 45 -121 34 52 76 34 20 14 3 32 18 168 -22 -122 49 46 77 52 39 -120 36 59 75 21 6 125 36 30 86 50 4 -117 32 37 69 24 2 -119 33 21 76 39 10 14 3 35 18 171 -22 -120 35 41 77 58 0 -118 45 15 75 25 31 120 41 6 87 14 32 -116 12 8 69 27 12 -117 30 57 76 43 45 14 3 38 18 173 -21 -118 20 22 78 3 4 -116 52 50 75 29 44 112 44 43 87 33 45 -114 51 24 69 30 14 -115 27 36 76 48 5 14 3 40 18 175 -21 -116 3 46 78 7 50 -114 59 42 75 33 44 101 26 17 87 44 55 -113 30 25 69 33 9 -113 23 15 76 52 11 14 3 43 18 177 -20 -113 45 47 78 12 19 -113 5 47 75 37 31 87 49 26 87 44 11 -112 9 9 69 35 57 -111 17 49 76 56 1 14 3 46 18 179 -20 -111 26 21 78 16 30 -111 11 3 75 41 5 74 44 19 87 27 41 -110 47 34 69 38 38 -109 11 14 76 59 35 14 3 49 18 182 -19 -109 5 23 78 20 22 -109 15 25 75 44 26 64 59 59 86 49 27 -109 25 39 69 41 11 -107 3 28 77 2 54 14 3 52 17 184 -19 -106 42 49 78 23 54 -107 18 50 75 47 32 ... .. .. .. .. .. -108 3 23 69 43 36 -104 54 25 77 5 55 14 3 55 17 186 -19 -104 18 33 78 27 7 -105 21 16 75 50 25 ... .. .. .. .. .. -106 40 43 69 45 54 -102 44 2 77 8 40 14 3 58 17 188 -18 -101 52 30 78 29 59 -103 22 39 75 53 3 ... .. .. .. .. .. -105 17 39 69 48 5 -100 32 15 77 11 8 14 4 1 17 191 -18 - 99 24 37 78 32 30 -101 22 55 75 55 27 ... .. .. .. .. .. -103 54 8 69 50 7 - 98 18 58 77 13 18 14 4 4 17 193 -17 - 96 54 47 78 34 39 - 99 22 1 75 57 35 ... .. .. .. .. .. -102 30 9 69 52 2 - 96 4 9 77 15 9 14 4 7 17 195 -17 - 94 22 55 78 36 24 - 97 19 53 75 59 28 ... .. .. .. .. .. -101 5 40 69 53 48 - 93 47 41 77 16 40 14 4 10 17 198 -16 - 91 48 54 78 37 47 - 95 16 25 76 1 5 ... .. .. .. .. .. - 99 40 39 69 55 27 - 91 29 28 77 17 52 14 4 13 16 200 -16 - 89 12 39 78 38 44 - 93 11 36 76 2 25 ... .. .. .. .. .. - 98 15 4 69 56 56 - 89 9 27 77 18 43 14 4 16 16 203 -16 - 86 34 1 78 39 15 - 91 5 18 76 3 28 ... .. .. .. .. .. - 96 48 54 69 58 18 - 86 47 29 77 19 13 14 4 19 16 205 -15 - 83 52 54 78 39 20 - 88 57 28 76 4 13 ... .. .. .. .. .. - 95 22 5 69 59 30 - 84 23 27 77 19 21 14 4 22 16 208 -15 - 81 9 6 78 38 55 - 86 47 59 76 4 40 ... .. .. .. .. .. - 93 54 37 70 0 34 - 81 57 14 77 19 5 14 4 25 16 210 -14 - 78 22 28 78 38 1 - 84 36 45 76 4 48 ... .. .. .. .. .. - 92 26 26 70 1 29 - 79 28 41 77 18 24 14 4 28 15 213 -14 - 75 32 46 78 36 36 - 82 23 39 76 4 36 ... .. .. .. .. .. - 90 57 31 70 2 14 - 76 57 37 77 17 18 14 4 31 15 215 -13 - 72 39 47 78 34 37 - 80 8 34 76 4 3 ... .. .. .. .. .. - 89 27 47 70 2 50 - 74 23 49 77 15 44 14 4 34 15 218 -13 - 69 43 12 78 32 2 - 77 51 21 76 3 8 ... .. .. .. .. .. - 87 57 14 70 3 15 - 71 47 5 77 13 42 14 4 36 14 221 -13 - 66 42 39 78 28 50 - 75 31 49 76 1 51 ... .. .. .. .. .. - 86 25 47 70 3 31 - 69 7 7 77 11 9 14 4 39 14 223 -12 - 63 37 42 78 24 56 - 73 9 48 76 0 9 ... .. .. .. .. .. - 84 53 23 70 3 36 - 66 23 36 77 8 4 14 4 42 14 226 -12 - 60 27 48 78 20 17 - 70 45 4 75 58 2 ... .. .. .. .. .. - 83 19 59 70 3 31 - 63 36 7 77 4 23 14 4 45 13 229 -11 - 57 12 14 78 14 50 - 68 17 20 75 55 28 ... .. .. .. .. .. - 81 45 31 70 3 14 - 60 44 11 77 0 4 14 4 48 13 232 -11 - 53 50 5 78 8 28 - 65 46 20 75 52 24 ... .. .. .. .. .. - 80 9 55 70 2 46 - 57 47 13 76 55 3 14 4 51 12 235 -11 - 50 20 10 78 1 4 - 63 11 41 75 48 50 ... .. .. .. .. .. - 78 33 6 70 2 6 - 54 44 25 76 49 16 14 4 54 12 238 -10 - 46 40 49 77 52 29 - 60 32 55 75 44 41 ... .. .. .. .. .. - 76 54 59 70 1 14 - 51 34 47 76 42 37 14 4 57 11 241 -10 - 42 49 41 77 42 30 - 57 49 31 75 39 56 ... .. .. .. .. .. - 75 15 29 70 0 8 - 48 17 0 76 34 59 14 5 0 10 244 -10 - 38 43 15 77 30 49 - 55 0 47 75 34 30 ... .. .. .. .. .. - 73 34 29 69 58 49 - 44 49 15 76 26 11 14 5 3 10 248 -9 - 34 15 55 77 16 55 - 52 5 51 75 28 18 ... .. .. .. .. .. - 71 51 52 69 57 16 - 41 8 54 76 16 0 14 5 6 9 251 -9 - 29 17 38 76 59 55 - 49 3 34 75 21 14 ... .. .. .. .. .. - 70 7 31 69 55 28 - 37 11 59 76 4 5 14 5 9 8 255 -8 - 23 26 49 76 38 0 - 45 52 23 75 13 9 ... .. .. .. .. .. - 68 21 17 69 53 24 - 32 51 57 75 49 52 14 5 12 7 260 -8 - 15 34 10 76 5 20 - 42 30 10 75 3 53 ... .. .. .. .. .. - 66 32 59 69 51 4 - 27 56 30 75 32 17 14 5 15 6 264 -8 ... .. .. .. .. .. - 38 53 45 74 53 9 ... .. .. .. .. .. - 64 42 26 69 48 26 - 21 56 43 75 8 55 14 5 18 5 270 -8 ... .. .. .. .. .. - 34 58 6 74 40 31 ... .. .. .. .. .. - 62 49 26 69 45 29 - 12 45 40 74 29 17 14 5 21 2 279 -7 ... .. .. .. .. .. - 30 34 29 74 25 14 ... .. .. .. .. .. - 60 53 41 69 42 12 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. - 25 24 44 74 5 47 ... .. .. .. .. .. - 58 54 54 69 38 32 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. - 18 35 11 73 37 44 ... .. .. .. .. .. - 56 52 43 69 34 29 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. - 54 46 42 69 30 0 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. - 52 36 18 69 25 1 Data for the target star ------------------------ * name: UCAC2 33404077 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 46 43.6748 DE: +04 31 14.537 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .022 ) * V mag [mag]: 11.1 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2893) Peiroos approx. diameter [km]: 87 approx. diameter ["]: .023 distance from Earth [AU]: 5.14600 * orbital information: orbit source: Preston date of fit: 2007 Nov 02 source of used astrometry: MPC (via Astdys) number of used observations: 505 number of rejected observations: 19 time covered by the observations: 1933 Jan 26 - 2007 Apr 20 1 sigma uncertainty ellipse (major, minor, PA): 0.092, 0.055, 113° remarks: * orbital elements for (2893) Peiroos : Mean anomaly = 280.33620289 deg Arg. of pericenter = 171.64587578 deg Long. of node = 108.76942335 deg Inclination = 14.64755676 deg Eccentricity = 0.07699486 Semimajor axis = 5.17253838 AU Perihelion dist = 4.77427950 AU Mag: H = 8.98, G = 0.15 Epoch of elements : MJD 54472.58600000 TDT (2008 Jan 07.586) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 07 2893 Peiroos 14h 3.6m UT 11.1 13 46 43.675 4 31 14.54UCAC2 33404077 0.0 17.0 87 4.8 5.146 1.168 0.67 -110.733 4.521 -29.37 -22.40 14.0596 -.03593 .94873 10.22292 0.38930 -0.00568 0.00244 2000 280.1195432008 1 5.00000171.645876108.769423 14.6475570.076994865.172538384.774279509.235 0.15 RATE .8378160 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.094 0.059 111.9 3.880 0.067 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org