IOTA/IOTA-ES occultation update for (439) Ohio / TYC 5143-00878-1 event on 2008 Feb 04, 00:33 UT Visible from Russia Summary ------- On 2008 Feb 04 UT, the 76 km diameter asteroid (439) Ohio will occult a 10.2 mag star in the constellation Aquila for observers along a path across Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.9 mag to 16.1 mag (the magnitude of the asteroid) for at most 1.7 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: 63 * date and approx. time of event: 2008 Feb 04, 00:32 - 2008 Feb 04, 00:34 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 5.9 * estimated maximum duration [s]: 1.7 * Moon: 10 % sunlit, 23° distance * Sun: 27° distance * rough path description: Russia Additional comments ------------------- 0.6" double star The occultation path -------------------- * approximate projected width [km]: 165 * 1 sigma uncertainty interval [path widths]: +/- 0.96 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .024", 86° ) * approx speed of asteroid's shadow [km/s]: 43.8780 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5143-00878-1 by 439 Ohio on 2008 Feb 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 ... .. .. 75 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. -156 29 43 ... .. .. 74 0 0 .. .. .. .. .. .. ... .. .. -151 38 25 ... .. .. -162 21 5 -152 34 19 73 0 0 0 34 20 2 238 -2 -146 55 29 -157 54 29 ... .. .. -167 34 43 -158 38 16 72 0 0 0 34 20 4 232 0 -153 37 48 -163 27 13 ... .. .. -172 20 30 Latitude Latitude Latitude Latitude -160 0 0 71 45 28 0 34 19 5 231 0 70 54 34 72 38 8 .. .. .. 74 25 0 -161 0 0 71 34 34 0 34 19 5 230 1 70 43 32 72 27 21 .. .. .. 74 14 31 -162 0 0 71 23 26 0 34 19 5 229 1 70 32 18 72 16 22 .. .. .. 74 3 49 -163 0 0 71 12 7 0 34 19 6 228 1 70 20 52 72 5 9 .. .. .. 73 52 53 -164 0 0 71 0 34 0 34 19 6 227 1 70 9 13 71 53 44 .. .. .. 73 41 44 -165 0 0 70 48 49 0 34 18 7 226 2 69 57 21 71 42 6 68 23 0 73 30 22 -166 0 0 70 36 51 0 34 18 7 225 2 69 45 17 71 30 15 68 10 46 73 18 46 -167 0 0 70 24 41 0 34 18 7 224 2 69 33 1 71 18 11 67 58 20 73 6 56 -168 0 0 70 12 18 0 34 18 8 223 3 69 20 33 71 5 54 67 45 43 72 54 54 -169 0 0 69 59 43 0 34 17 8 222 3 69 7 53 70 53 25 67 32 54 72 42 37 -170 0 0 69 46 56 0 34 17 8 222 3 68 55 1 70 40 43 67 19 53 72 30 8 -171 0 0 69 33 56 0 34 17 9 221 4 68 41 56 70 27 48 67 6 42 72 17 25 -172 0 0 69 20 44 0 34 16 9 220 4 68 28 40 70 14 41 66 53 18 72 4 28 -173 0 0 69 7 20 0 34 16 10 219 4 68 15 13 70 1 22 66 39 44 71 51 19 -174 0 0 68 53 45 0 34 15 10 218 4 68 1 33 69 47 50 66 25 59 71 37 56 -175 0 0 68 39 57 0 34 15 10 217 5 67 47 43 69 34 6 66 12 3 71 24 21 -176 0 0 68 25 59 0 34 15 11 216 5 67 33 41 69 20 11 65 57 56 71 10 32 -177 0 0 68 11 48 0 34 14 11 215 5 67 19 28 69 6 3 65 43 39 70 56 31 -178 0 0 67 57 27 0 34 14 12 214 6 67 5 5 68 51 44 65 29 12 70 42 18 -179 0 0 67 42 55 0 34 13 12 213 6 66 50 31 68 37 14 65 14 35 70 27 52 -180 0 0 67 28 12 0 34 13 12 212 6 66 35 46 68 22 33 64 59 48 70 13 14 179 0 0 67 13 19 0 34 12 13 211 6 66 20 52 68 7 41 64 44 52 69 58 25 178 0 0 66 58 15 0 34 11 13 210 7 66 5 48 67 52 38 64 29 46 69 43 24 177 0 0 66 43 2 0 34 11 14 209 7 65 50 34 67 37 25 64 14 32 69 28 11 176 0 0 66 27 39 0 34 10 14 208 7 65 35 11 67 22 2 63 59 9 69 12 48 175 0 0 66 12 7 0 34 10 15 207 7 65 19 40 67 6 29 63 43 39 68 57 14 174 0 0 65 56 26 0 34 9 15 206 8 65 3 59 66 50 47 63 28 0 68 41 30 173 0 0 65 40 36 0 34 8 15 205 8 64 48 11 66 34 56 63 12 13 68 25 36 172 0 0 65 24 38 0 34 7 16 204 8 64 32 15 66 18 57 62 56 20 68 9 32 171 0 0 65 8 33 0 34 7 16 203 8 64 16 11 66 2 49 62 40 19 67 53 20 170 0 0 64 52 20 0 34 6 17 202 9 64 0 1 65 46 34 62 24 13 67 36 58 169 0 0 64 36 0 0 34 5 17 201 9 63 43 44 65 30 11 62 8 0 67 20 28 168 0 0 64 19 34 0 34 4 17 200 9 63 27 20 65 13 41 61 51 42 67 3 51 167 0 0 64 3 1 0 34 3 18 199 9 63 10 51 64 57 5 61 35 18 66 47 6 166 0 0 63 46 23 0 34 2 18 198 10 62 54 17 64 40 23 61 18 50 66 30 14 165 0 0 63 29 40 0 34 1 19 197 10 62 37 38 64 23 35 61 2 17 66 13 16 164 0 0 63 12 52 0 34 1 19 196 10 62 20 54 64 6 42 60 45 41 65 56 12 163 0 0 62 56 0 0 34 0 19 195 10 62 4 7 63 49 45 60 29 1 65 39 3 162 0 0 62 39 4 0 33 59 20 194 10 61 47 16 63 32 44 60 12 19 65 21 49 161 0 0 62 22 5 0 33 58 20 193 11 61 30 22 63 15 39 59 55 34 65 4 30 160 0 0 62 5 4 0 33 56 21 192 11 61 13 26 62 58 31 59 38 47 64 47 8 159 0 0 61 48 0 0 33 55 21 191 11 60 56 28 62 41 21 59 21 59 64 29 43 158 0 0 61 30 54 0 33 54 21 190 11 60 39 29 62 24 8 59 5 10 64 12 16 157 0 0 61 13 48 0 33 53 22 189 11 60 22 29 62 6 55 58 48 20 63 54 46 156 0 0 60 56 41 0 33 52 22 188 11 60 5 28 61 49 41 58 31 31 63 37 15 155 0 0 60 39 34 0 33 51 22 187 11 59 48 28 61 32 26 58 14 42 63 19 44 154 0 0 60 22 28 0 33 50 23 186 11 59 31 29 61 15 12 57 57 54 63 2 12 153 0 0 60 5 23 0 33 48 23 184 12 59 14 31 60 57 59 57 41 8 62 44 41 152 0 0 59 48 20 0 33 47 23 183 12 58 57 35 60 40 48 57 24 25 62 27 11 151 0 0 59 31 18 0 33 46 24 182 12 58 40 41 60 23 38 57 7 44 62 9 43 150 0 0 59 14 20 0 33 44 24 181 12 58 23 51 60 6 32 56 51 6 61 52 17 149 0 0 58 57 25 0 33 43 24 180 12 58 7 4 59 49 28 56 34 32 61 34 54 148 0 0 58 40 35 0 33 42 25 179 12 57 50 21 59 32 29 56 18 3 61 17 34 147 0 0 58 23 48 0 33 40 25 178 12 57 33 43 59 15 33 56 1 38 61 0 19 146 0 0 58 7 7 0 33 39 25 177 12 57 17 10 58 58 43 55 45 19 60 43 8 145 0 0 57 50 32 0 33 37 25 176 12 57 0 43 58 41 59 55 29 5 60 26 3 144 0 0 57 34 2 0 33 36 26 175 12 56 44 22 58 25 20 55 12 58 60 9 4 143 0 0 57 17 40 0 33 35 26 173 12 56 28 8 58 8 48 54 56 58 59 52 12 142 0 0 57 1 25 0 33 33 26 172 12 56 12 1 57 52 24 54 41 6 59 35 26 141 0 0 56 45 17 0 33 32 26 171 12 55 56 2 57 36 7 54 25 21 59 18 49 140 0 0 56 29 19 0 33 30 26 170 11 55 40 12 57 19 59 54 9 45 59 2 20 139 0 0 56 13 29 0 33 29 26 169 11 55 24 30 57 4 0 53 54 18 58 45 59 138 0 0 55 57 48 0 33 27 27 168 11 55 8 58 56 48 10 53 39 1 58 29 49 137 0 0 55 42 17 0 33 25 27 167 11 54 53 36 56 32 30 53 23 53 58 13 48 136 0 0 55 26 57 0 33 24 27 165 11 54 38 25 56 17 1 53 8 56 57 57 58 135 0 0 55 11 48 0 33 22 27 164 11 54 23 24 56 1 42 52 54 10 57 42 19 134 0 0 54 56 51 0 33 21 27 163 11 54 8 35 55 46 36 52 39 35 57 26 51 133 0 0 54 42 5 0 33 19 27 162 10 53 53 57 55 31 41 52 25 12 57 11 36 132 0 0 54 27 32 0 33 18 27 161 10 53 39 32 55 16 58 52 11 1 56 56 34 131 0 0 54 13 11 0 33 16 27 160 10 53 25 20 55 2 29 51 57 3 56 41 44 130 0 0 53 59 5 0 33 14 27 159 10 53 11 22 54 48 13 51 43 18 56 27 8 129 0 0 53 45 11 0 33 13 27 157 10 52 57 36 54 34 11 51 29 46 56 12 47 128 0 0 53 31 32 0 33 11 27 156 9 52 44 5 54 20 23 51 16 29 55 58 40 127 0 0 53 18 8 0 33 9 27 155 9 52 30 49 54 6 50 51 3 26 55 44 48 126 0 0 53 4 59 0 33 8 27 154 9 52 17 47 53 53 33 50 50 38 55 31 12 125 0 0 52 52 5 0 33 6 27 153 8 52 5 1 53 40 31 50 38 5 55 17 51 124 0 0 52 39 27 0 33 5 27 152 8 51 52 31 53 27 44 50 25 47 55 4 47 123 0 0 52 27 5 0 33 3 27 151 8 51 40 16 53 15 15 50 13 45 54 51 59 122 0 0 52 15 0 0 33 1 27 150 7 51 28 18 53 3 2 50 2 0 54 39 29 121 0 0 52 3 12 0 33 0 26 148 7 51 16 37 52 51 6 49 50 31 54 27 16 120 0 0 51 51 41 0 32 58 26 147 7 51 5 13 52 39 27 49 39 19 54 15 21 119 0 0 51 40 28 0 32 57 26 146 6 50 54 7 52 28 7 49 28 24 54 3 44 118 0 0 51 29 33 0 32 55 26 145 6 50 43 18 52 17 4 49 17 47 53 52 26 117 0 0 51 18 56 0 32 53 26 144 6 50 32 48 52 6 20 49 7 27 53 41 27 116 0 0 51 8 37 0 32 52 25 143 5 50 22 36 51 55 55 48 57 26 53 30 47 115 0 0 50 58 38 0 32 50 25 142 5 50 12 42 51 45 49 48 47 43 53 20 26 114 0 0 50 48 57 0 32 49 25 141 4 50 3 8 51 36 2 48 38 19 53 10 25 113 0 0 50 39 36 0 32 47 25 140 4 49 53 53 51 26 35 48 29 13 53 0 44 112 0 0 50 30 35 0 32 46 24 139 3 49 44 57 51 17 28 48 20 27 52 51 24 111 0 0 50 21 54 0 32 44 24 138 3 49 36 21 51 8 41 48 12 1 52 42 24 110 0 0 50 13 33 0 32 43 24 137 2 49 28 5 51 0 14 48 3 53 52 33 45 109 0 0 50 5 32 0 32 41 23 136 2 49 20 9 50 52 8 47 56 6 52 25 27 108 0 0 49 57 52 0 32 40 23 135 1 49 12 34 50 44 22 47 48 39 52 17 31 107 0 0 49 50 32 0 32 38 23 134 1 49 5 19 50 36 58 47 41 32 52 9 56 106 0 0 49 43 34 0 32 37 22 133 0 48 58 25 50 29 55 47 34 45 52 2 42 105 0 0 49 36 56 0 32 36 22 132 0 48 51 52 50 23 13 47 28 19 51 55 51 104 0 0 49 30 41 0 32 34 21 131 -1 48 45 40 50 16 53 47 22 14 51 49 21 103 0 0 49 24 46 0 32 33 21 130 -1 48 39 49 50 10 54 47 16 30 51 43 14 102 0 0 49 19 13 0 32 32 21 129 -2 48 34 20 50 5 18 47 11 6 51 37 29 101 0 0 49 14 2 0 32 30 20 128 -3 48 29 12 50 0 3 47 6 4 51 32 7 100 0 0 49 9 13 0 32 29 20 127 -3 48 24 26 49 55 11 47 1 24 51 27 7 99 0 0 49 4 46 0 32 28 19 126 -4 48 20 1 49 50 41 46 57 4 51 22 31 98 0 0 49 0 41 0 32 27 19 125 -4 48 15 59 49 46 33 46 53 6 51 18 17 97 0 0 48 56 58 0 32 25 18 124 -5 48 12 19 49 42 48 46 49 30 51 14 26 96 0 0 48 53 38 0 32 24 18 123 -5 48 9 0 49 39 25 46 46 16 51 10 58 95 0 0 48 50 40 0 32 23 17 123 -6 48 6 4 49 36 25 46 43 23 51 7 53 94 0 0 48 48 4 0 32 22 17 122 -7 48 3 30 49 33 47 46 40 52 51 5 12 93 0 0 48 45 51 0 32 21 16 121 -7 48 1 19 49 31 32 46 38 43 51 2 53 92 0 0 48 44 0 0 32 20 15 120 -8 47 59 29 49 29 40 46 36 56 51 0 59 91 0 0 48 42 32 0 32 19 15 119 -9 47 58 2 49 28 11 46 35 30 50 59 27 90 0 0 48 41 27 0 32 18 14 118 -9 47 56 58 49 27 5 46 34 27 50 58 19 89 0 0 48 40 44 0 32 17 14 117 -10 47 56 16 49 26 22 46 33 46 50 57 34 88 0 0 48 40 24 0 32 17 13 117 -11 47 55 56 49 26 1 46 33 27 50 57 13 87 0 0 48 40 27 0 32 16 12 116 -11 47 55 58 49 26 4 46 33 30 50 57 15 86 0 0 48 40 52 0 32 15 12 115 -12 47 56 23 49 26 29 46 33 54 50 57 41 85 0 0 48 41 39 0 32 14 11 114 -12 47 57 11 49 27 17 46 34 41 50 58 30 84 0 0 48 42 50 0 32 14 11 113 -13 47 58 21 49 28 28 46 35 50 50 59 42 83 0 0 48 44 23 0 32 13 10 113 -14 47 59 53 49 30 2 46 37 21 51 1 18 82 0 0 48 46 18 0 32 12 9 112 -14 48 1 47 49 31 58 46 39 13 51 3 17 81 0 0 48 48 36 0 32 12 9 111 -15 48 4 3 49 34 17 46 41 27 51 5 39 80 0 0 48 51 16 0 32 11 8 110 -16 48 6 42 49 36 59 46 44 4 51 8 24 79 0 0 48 54 18 0 32 11 8 109 -16 48 9 43 49 40 3 .. .. .. 51 11 32 78 0 0 48 57 43 0 32 10 7 109 -17 48 13 5 49 43 30 .. .. .. 51 15 4 77 0 0 49 1 29 0 32 10 6 108 -18 48 16 50 49 47 19 .. .. .. 51 18 58 76 0 0 49 5 38 0 32 9 6 107 -18 48 20 56 49 51 30 .. .. .. 51 23 14 75 0 0 49 10 9 0 32 9 5 106 -19 48 25 24 49 56 3 .. .. .. 51 27 54 74 0 0 49 15 1 0 32 9 4 106 -20 48 30 13 50 0 59 .. .. .. 51 32 56 73 0 0 49 20 15 0 32 8 4 105 -20 48 35 24 50 6 16 .. .. .. 51 38 20 72 0 0 49 25 50 0 32 8 3 104 -21 48 40 56 50 11 55 .. .. .. 51 44 7 71 0 0 49 31 47 0 32 8 2 103 -22 48 46 50 50 17 55 .. .. .. 51 50 16 70 0 0 49 38 5 0 32 8 2 103 -22 48 53 4 50 24 17 .. .. .. 51 56 46 69 0 0 49 44 43 0 32 8 1 102 -23 .. .. .. 50 31 0 .. .. .. 52 3 38 68 0 0 49 51 43 0 32 8 0 101 -24 .. .. .. 50 38 4 .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 5143-00878-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 23 05.8052 DE: -06 53 13.224 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 10.2 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (439) Ohio approx. diameter [km]: 76 approx. diameter ["]: .025 distance from Earth [AU]: 4.15400 * orbital information: orbit source: Preston date of fit: 2007 Nov 01 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 682 number of rejected observations: 53 time covered by the observations: 1909 Oct 10 - 2007 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.012, 81° remarks: * orbital elements for (439) Ohio : Mean anomaly = 207.64681139 deg Arg. of pericenter = 238.39934317 deg Long. of node = 201.70486534 deg Inclination = 19.13846744 deg Eccentricity = 0.06126959 Semimajor axis = 3.13656880 AU Perihelion dist = 2.94439252 AU Mag: H = 9.79, G = 0.15 Epoch of elements : MJD 54500.02300000 TDT (2008 Feb 04.023) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 04 439 Ohio 0h 33.2m UT 10.2 19 23 5.805- 6 53 13.22TYC 5143-00878-1 10.6 16.1 76 1.7 4.154 3.437 11.35 148.900 -6.890 175.15 -16.46 0.5540 -.19145 .86621 24.17884 5.36064 -0.00254 0.00109 2000 205.8684512008 125.00000238.399343201.704865 19.1384670.061269593.136568802.944392529.835 0.15 RATE 1.7742790 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.027 0.024 86.5 1.960 0.024 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 30, 22:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org