IOTA/IOTA-ES occultation update for (184) Dejopeja / TYC 4955-01001-1 event on 2008 Dec 04, 19:44 UT Visible from NE Russia Summary ------- On 2008 Dec 04 UT, the 67 km diameter asteroid (184) Dejopeja will occult a 9.2 mag star in the constellation Virgo for observers along a path across NE Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 14.1 mag (the magnitude of the asteroid) for at most 2.1 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: 74 * date and approx. time of event: 2008 Dec 04, 19:42 - 2008 Dec 04, 19:43 UT * magnitude of target star: 9.2 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 2.1 * Moon: 39 % sunlit, 138° distance * Sun: 61° distance * rough path description: NE Russia The occultation path -------------------- * approximate projected width [km]: 103 * 1 sigma uncertainty interval [path widths]: +/- 0.77 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .024", .021", 102° ) * approx speed of asteroid's shadow [km/s]: 31.9029 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4955-01001-1 by 184 Dejopeja on 2008 Dec 4 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 ' " Latitude Latitude Latitude Latitude 109 0 0 72 39 30 19 42 49 0 108 -33 72 10 25 .. .. .. .. .. .. .. .. .. 110 0 0 72 33 32 19 42 49 0 109 -33 72 4 21 73 3 1 .. .. .. .. .. .. 111 0 0 72 27 19 19 42 49 1 110 -33 71 58 2 72 56 55 .. .. .. 73 43 8 112 0 0 72 20 52 19 42 49 1 111 -33 71 51 29 72 50 34 .. .. .. 73 36 58 113 0 0 72 14 10 19 42 49 1 112 -33 71 44 41 72 43 59 .. .. .. 73 30 33 114 0 0 72 7 14 19 42 49 2 113 -32 71 37 38 72 37 9 .. .. .. 73 23 54 115 0 0 72 0 2 19 42 49 2 114 -32 71 30 19 72 30 4 .. .. .. 73 17 0 116 0 0 71 52 34 19 42 49 2 115 -32 71 22 45 72 22 44 .. .. .. 73 9 51 117 0 0 71 44 51 19 42 49 3 116 -32 71 14 55 72 15 8 .. .. .. 73 2 27 118 0 0 71 36 52 19 42 49 3 117 -32 71 6 48 72 7 16 70 21 9 72 54 47 119 0 0 71 28 36 19 42 49 3 118 -31 70 58 25 71 59 8 70 12 35 72 46 51 120 0 0 71 20 4 19 42 49 4 118 -31 70 49 46 71 50 44 70 3 44 72 38 39 121 0 0 71 11 15 19 42 49 4 119 -31 70 40 49 71 42 3 69 54 37 72 30 11 122 0 0 71 2 9 19 42 50 4 120 -31 70 31 35 71 33 4 69 45 11 72 21 26 123 0 0 70 52 46 19 42 50 5 121 -30 70 22 4 71 23 49 69 35 28 72 12 23 124 0 0 70 43 4 19 42 50 5 122 -30 70 12 15 71 14 16 69 25 27 72 3 4 125 0 0 70 33 5 19 42 50 5 123 -30 70 2 7 71 4 25 69 15 7 71 53 26 126 0 0 70 22 47 19 42 50 6 124 -30 69 51 41 70 54 16 69 4 29 71 43 31 127 0 0 70 12 10 19 42 50 6 125 -29 69 40 56 70 43 48 68 53 32 71 33 17 128 0 0 70 1 15 19 42 51 7 126 -29 69 29 52 70 33 1 68 42 15 71 22 44 129 0 0 69 50 0 19 42 51 7 127 -29 69 18 28 70 21 55 68 30 39 71 11 52 130 0 0 69 38 25 19 42 51 7 128 -28 69 6 45 70 10 29 68 18 43 71 0 41 131 0 0 69 26 30 19 42 52 8 129 -28 68 54 41 69 58 43 68 6 27 70 49 9 132 0 0 69 14 15 19 42 52 8 130 -28 68 42 18 69 46 37 67 53 50 70 37 18 133 0 0 69 1 39 19 42 52 9 131 -27 68 29 33 69 34 10 67 40 53 70 25 6 134 0 0 68 48 42 19 42 53 9 132 -27 68 16 27 69 21 22 67 27 34 70 12 33 135 0 0 68 35 24 19 42 53 9 133 -27 68 3 0 69 8 13 67 13 54 69 59 39 136 0 0 68 21 44 19 42 53 10 134 -26 67 49 11 68 54 42 66 59 52 69 46 23 137 0 0 68 7 42 19 42 54 10 135 -26 67 35 0 68 40 49 66 45 28 69 32 45 138 0 0 67 53 17 19 42 54 11 136 -26 67 20 27 68 26 34 66 30 42 69 18 44 139 0 0 67 38 30 19 42 55 11 136 -25 67 5 31 68 11 56 66 15 33 69 4 21 140 0 0 67 23 20 19 42 55 12 137 -25 66 50 12 67 56 55 66 0 1 68 49 35 141 0 0 67 7 46 19 42 56 12 138 -25 66 34 30 67 41 30 65 44 7 68 34 25 142 0 0 66 51 49 19 42 56 13 139 -24 66 18 24 67 25 42 65 27 48 68 18 52 143 0 0 66 35 28 19 42 57 13 140 -24 66 1 55 67 9 30 65 11 6 68 2 54 144 0 0 66 18 43 19 42 57 13 141 -23 65 45 1 66 52 54 64 54 0 67 46 32 145 0 0 66 1 34 19 42 58 14 142 -23 65 27 43 66 35 53 64 36 30 67 29 45 146 0 0 65 43 59 19 42 59 14 143 -23 65 10 1 66 18 28 64 18 36 67 12 34 147 0 0 65 26 0 19 42 59 15 144 -22 64 51 54 66 0 37 64 0 17 66 54 57 148 0 0 65 7 36 19 43 0 15 145 -22 64 33 22 65 42 21 63 41 34 66 36 54 149 0 0 64 48 47 19 43 1 16 146 -21 64 14 25 65 23 40 63 22 26 66 18 26 150 0 0 64 29 32 19 43 2 16 147 -21 63 55 3 65 4 33 63 2 53 65 59 32 151 0 0 64 9 52 19 43 2 17 148 -20 63 35 15 64 45 0 62 42 54 65 40 12 152 0 0 63 49 46 19 43 3 17 149 -20 63 15 3 64 25 2 62 22 31 65 20 25 153 0 0 63 29 15 19 43 4 18 150 -19 62 54 24 64 4 37 62 1 43 65 0 12 154 0 0 63 8 18 19 43 5 19 151 -19 62 33 20 63 43 47 61 40 30 64 39 33 155 0 0 62 46 55 19 43 6 19 152 -18 62 11 51 63 22 30 61 18 52 64 18 27 156 0 0 62 25 6 19 43 7 20 153 -18 61 49 57 63 0 48 60 56 48 63 56 54 157 0 0 62 2 51 19 43 8 20 154 -17 61 27 37 62 38 39 60 34 20 63 34 55 158 0 0 61 40 11 19 43 9 21 155 -17 61 4 51 62 16 5 60 11 27 63 12 30 159 0 0 61 17 6 19 43 11 21 156 -16 60 41 41 61 53 4 59 48 10 62 49 38 160 0 0 60 53 35 19 43 12 22 157 -15 60 18 6 61 29 39 59 24 28 62 26 20 161 0 0 60 29 40 19 43 13 22 158 -15 59 54 6 61 5 47 59 0 22 62 2 36 162 0 0 60 5 19 19 43 14 23 159 -14 59 29 42 60 41 31 58 35 52 61 38 26 163 0 0 59 40 34 19 43 16 23 160 -14 59 4 54 60 16 50 58 10 59 61 13 50 164 0 0 59 15 26 19 43 17 24 161 -13 58 39 42 59 51 44 57 45 43 60 48 50 165 0 0 58 49 53 19 43 19 25 162 -12 58 14 6 59 26 14 57 20 4 60 23 24 166 0 0 58 23 57 19 43 20 25 163 -12 57 48 8 59 0 20 56 54 3 59 57 34 167 0 0 57 57 39 19 43 22 26 164 -11 57 21 48 58 34 4 56 27 40 59 31 20 168 0 0 57 30 58 19 43 24 26 165 -10 56 55 6 58 7 24 56 0 56 59 4 43 169 0 0 57 3 56 19 43 25 27 166 -10 56 28 3 57 40 23 55 33 51 58 37 43 170 0 0 56 36 32 19 43 27 27 167 -9 56 0 39 57 13 0 55 6 27 58 10 21 171 0 0 56 8 49 19 43 29 28 168 -8 55 32 56 56 45 17 54 38 44 57 42 38 172 0 0 55 40 46 19 43 31 29 169 -8 55 4 53 56 17 13 54 10 42 57 14 33 173 0 0 55 12 24 19 43 33 29 170 -7 54 36 33 55 48 50 53 42 22 56 46 9 174 0 0 54 43 45 19 43 35 30 171 -6 54 7 54 55 20 10 53 13 46 56 17 26 175 0 0 54 14 48 19 43 37 30 173 -5 53 39 0 54 51 11 52 44 54 55 48 24 176 0 0 53 45 36 19 43 39 31 174 -5 53 9 49 54 21 56 52 15 47 55 19 6 177 0 0 53 16 8 19 43 41 31 175 -4 52 40 24 53 52 26 51 46 25 54 49 30 178 0 0 52 46 26 19 43 43 32 176 -3 52 10 45 53 22 40 51 16 51 54 19 40 179 0 0 52 16 31 19 43 45 32 177 -2 51 40 53 52 52 42 50 47 4 53 49 35 180 0 0 51 46 23 19 43 48 33 178 -1 51 10 50 52 22 30 50 17 6 53 19 17 -179 0 0 51 16 5 19 43 50 34 179 -1 50 40 36 51 52 8 49 46 58 52 48 47 Uncertainty in time = +/- 2 secs [Prediction of 2008 Nov 26.0] Data for the target star ------------------------ * name: TYC 4955-01001-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 12 45 02.0171 DE: -05 16 21.700 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .019 ) * V mag [mag]: 9.2 * B mag [mag]: 9.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (184) Dejopeja approx. diameter [km]: 67 approx. diameter ["]: .028 distance from Earth [AU]: 3.30200 * orbital information: orbit source: Preston date of fit: 2008 Oct 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1062 number of rejected observations: 112 time covered by the observations: 1903 Sep 01 - 2008 May 06 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.010, 114° remarks: * orbital elements for (184) Dejopeja : Mean anomaly = 355.68250882 deg Arg. of pericenter = 208.05876022 deg Long. of node = 332.44996389 deg Inclination = 1.14643684 deg Eccentricity = 0.07509385 Semimajor axis = 3.18180160 AU Perihelion dist = 2.94286786 AU Mag: H = 8.38, G = 0.15 Epoch of elements : MJD 54804.82300000 TDT (2008 Dec 04.823) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Dec 4 184 Dejopeja 19h 45.0m UT 9.2 12 45 2.017- 5 16 21.70TYC 4955-01001-1 9.8 14.1 67 2.1 3.302 2.938 -19.37 -178.9766 -5.267 -118.61 -22.36 19.7495 0.30722 0.69356 16.47286 -7.27280 -0.00481 0.00202 2000 354.84495720081130.00000208.058760332.449964 1.1464370.07509385 3.1818016 2.9428679 8.3 5.00.15 RATE 1.7365790 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.024 0.021 102 1.77 0.021 0 54796.5020081204_1001-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 26, 23:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org