IOTA/IOTA-ES occultation update for (1096) Reunerta / TYC 5819-00239-1 event on 2008 May 18, 14:24 UT Visible from New Zealand Summary ------- On 2008 May 18 UT, the 46 km diameter asteroid (1096) Reunerta will occult a 10.8 mag star in the constellation Aquarius for observers along a path across New Zealand. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 14.7 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: 67 * date and approx. time of event: 2008 May 18, 14:21 - 2008 May 18, 14:24 UT * midpoint of event [JD]: 2454605.10053333 * magnitude of target star: 10.8 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 1.7 * Moon: 98 % sunlit, 117° distance * Sun: 79° distance * rough path description: New Zealand The occultation path -------------------- * approximate projected width [km]: 51 * 1 sigma uncertainty interval [path widths]: +/- 0.89 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .039", .028", 76° ) * approx speed of asteroid's shadow [km/s]: 26.7647 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5819-00239-1 by 1096 Reunerta on 2008 May 18 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 151 0 0 -37 18 48 14 21 12 0 108 -71 -37 33 28 -37 4 10 -37 59 40 -36 38 11 152 0 0 -37 34 53 14 21 12 1 108 -71 -37 49 33 -37 20 16 -38 15 42 -36 54 19 153 0 0 -37 50 44 14 21 12 2 107 -70 -38 5 23 -37 36 8 -38 31 31 -37 10 13 154 0 0 -38 6 21 14 21 12 3 107 -70 -38 20 58 -37 51 46 -38 47 4 -37 25 53 155 0 0 -38 21 43 14 21 12 4 106 -69 -38 36 19 -38 7 9 -39 2 23 -37 41 17 156 0 0 -38 36 50 14 21 13 5 105 -68 -38 51 25 -38 22 17 -39 17 27 -37 56 28 157 0 0 -38 51 42 14 21 13 5 105 -68 -39 6 16 -38 37 10 -39 32 16 -38 11 23 158 0 0 -39 6 19 14 21 13 6 104 -67 -39 20 52 -38 51 48 -39 46 50 -38 26 3 159 0 0 -39 20 41 14 21 14 7 103 -66 -39 35 12 -39 6 11 -40 1 8 -38 40 28 160 0 0 -39 34 47 14 21 14 8 103 -66 -39 49 17 -39 20 19 -40 15 11 -38 54 37 161 0 0 -39 48 38 14 21 15 9 102 -65 -40 3 7 -39 34 11 -40 28 59 -39 8 31 162 0 0 -40 2 13 14 21 16 9 101 -64 -40 16 41 -39 47 47 -40 42 31 -39 22 10 163 0 0 -40 15 33 14 21 16 10 101 -64 -40 29 59 -40 1 8 -40 55 47 -39 35 32 164 0 0 -40 28 36 14 21 17 11 100 -63 -40 43 2 -40 14 12 -41 8 47 -39 48 39 165 0 0 -40 41 24 14 21 18 12 100 -62 -40 55 49 -40 27 1 -41 21 32 -40 1 30 166 0 0 -40 53 56 14 21 18 13 99 -62 -41 8 19 -40 39 34 -41 34 0 -40 14 5 167 0 0 -41 6 11 14 21 19 13 98 -61 -41 20 34 -40 51 51 -41 46 13 -40 26 24 168 0 0 -41 18 11 14 21 20 14 97 -60 -41 32 32 -41 3 52 -41 58 9 -40 38 26 169 0 0 -41 29 54 14 21 21 15 97 -59 -41 44 14 -41 15 36 -42 9 49 -40 50 13 170 0 0 -41 41 21 14 21 22 16 96 -59 -41 55 40 -41 27 4 -42 21 13 -41 1 43 171 0 0 -41 52 32 14 21 23 17 95 -58 -42 6 49 -41 38 16 -42 32 21 -41 12 57 172 0 0 -42 3 26 14 21 24 17 95 -57 -42 17 43 -41 49 11 -42 43 12 -41 23 54 173 0 0 -42 14 4 14 21 25 18 94 -57 -42 28 19 -41 59 50 -42 53 46 -41 34 35 174 0 0 -42 24 25 14 21 26 19 93 -56 -42 38 40 -42 10 13 -43 4 5 -41 45 0 175 0 0 -42 34 30 14 21 27 20 93 -55 -42 48 44 -42 20 19 -43 14 7 -41 55 7 176 0 0 -42 44 19 14 21 29 20 92 -54 -42 58 31 -42 30 8 -43 23 52 -42 4 59 177 0 0 -42 53 50 14 21 30 21 91 -54 -43 8 2 -42 39 41 -43 33 21 -42 14 33 178 0 0 -43 3 6 14 21 31 22 90 -53 -43 17 16 -42 48 57 -43 42 33 -42 23 52 179 0 0 -43 12 4 14 21 32 22 90 -52 -43 26 13 -42 57 57 -43 51 29 -42 32 53 180 0 0 -43 20 46 14 21 34 23 89 -52 -43 34 54 -43 6 40 -44 0 8 -42 41 38 -179 0 0 -43 29 12 14 21 35 24 88 -51 -43 43 19 -43 15 6 -44 8 31 -42 50 6 -178 0 0 -43 37 21 14 21 37 25 87 -50 -43 51 27 -43 23 16 -44 16 37 -42 58 17 -177 0 0 -43 45 13 14 21 38 25 87 -49 -43 59 18 -43 31 9 -44 24 27 -43 6 12 -176 0 0 -43 52 48 14 21 39 26 86 -49 -44 6 52 -43 38 46 -44 31 59 -43 13 50 -175 0 0 -44 0 7 14 21 41 27 85 -48 -44 14 10 -43 46 5 -44 39 16 -43 21 11 -174 0 0 -44 7 9 14 21 43 28 84 -47 -44 21 12 -43 53 8 -44 46 15 -43 28 16 -173 0 0 -44 13 55 14 21 44 28 83 -47 -44 27 56 -43 59 54 -44 52 59 -43 35 3 -172 0 0 -44 20 23 14 21 46 29 83 -46 -44 34 24 -44 6 24 -44 59 25 -43 41 34 -171 0 0 -44 26 35 14 21 47 30 82 -45 -44 40 36 -44 12 37 -45 5 35 -43 47 49 -170 0 0 -44 32 31 14 21 49 30 81 -44 -44 46 30 -44 18 33 -45 11 29 -43 53 46 -169 0 0 -44 38 10 14 21 51 31 80 -44 -44 52 8 -44 24 13 -45 17 5 -43 59 27 -168 0 0 -44 43 32 14 21 53 32 79 -43 -44 57 30 -44 29 36 -45 22 26 -44 4 51 -167 0 0 -44 48 37 14 21 54 32 78 -42 -45 2 35 -44 34 42 -45 27 29 -44 9 58 -166 0 0 -44 53 26 14 21 56 33 78 -42 -45 7 23 -44 39 31 -45 32 16 -44 14 49 -165 0 0 -44 57 59 14 21 58 34 77 -41 -45 11 55 -44 44 4 -45 36 47 -44 19 23 -164 0 0 -45 2 14 14 22 0 34 76 -40 -45 16 10 -44 48 20 -45 41 1 -44 23 40 -163 0 0 -45 6 13 14 22 2 35 75 -39 -45 20 8 -44 52 20 -45 44 59 -44 27 41 -162 0 0 -45 9 56 14 22 4 36 74 -39 -45 23 50 -44 56 3 -45 48 40 -44 31 24 -161 0 0 -45 13 21 14 22 6 36 73 -38 -45 27 15 -44 59 29 -45 52 4 -44 34 51 -160 0 0 -45 16 31 14 22 8 37 72 -37 -45 30 24 -45 2 39 -45 55 12 -44 38 2 -159 0 0 -45 19 23 14 22 10 38 71 -37 -45 33 16 -45 5 32 -45 58 3 -44 40 55 -158 0 0 -45 21 59 14 22 12 38 70 -36 -45 35 52 -45 8 8 -46 0 38 -44 43 32 -157 0 0 -45 24 18 14 22 14 39 70 -35 -45 38 11 -45 10 28 -46 2 57 -44 45 53 -156 0 0 -45 26 21 14 22 16 40 69 -34 -45 40 13 -45 12 31 -46 4 59 -44 47 56 -155 0 0 -45 28 7 14 22 18 40 68 -34 -45 41 59 -45 14 17 -46 6 44 -44 49 43 -154 0 0 -45 29 37 14 22 20 41 67 -33 -45 43 29 -45 15 47 -46 8 13 -44 51 13 -153 0 0 -45 30 50 14 22 22 42 66 -32 -45 44 41 -45 17 0 -46 9 26 -44 52 27 -152 0 0 -45 31 46 14 22 24 42 65 -32 -45 45 38 -45 17 56 -46 10 22 -44 53 23 -151 0 0 -45 32 26 14 22 27 43 64 -31 -45 46 17 -45 18 36 -46 11 1 -44 54 3 -150 0 0 -45 32 49 14 22 29 44 63 -30 -45 46 40 -45 19 0 -46 11 24 -44 54 27 -149 0 0 -45 32 56 14 22 31 44 62 -29 -45 46 47 -45 19 6 -46 11 30 -44 54 33 -148 0 0 -45 32 46 14 22 33 45 61 -29 -45 46 37 -45 18 56 -46 11 20 -44 54 23 -147 0 0 -45 32 19 14 22 36 45 59 -28 -45 46 10 -45 18 29 -46 10 54 -44 53 57 -146 0 0 -45 31 36 14 22 38 46 58 -27 -45 45 27 -45 17 46 -46 10 11 -44 53 13 -145 0 0 -45 30 36 14 22 41 47 57 -27 -45 44 27 -45 16 46 -46 9 11 -44 52 13 -144 0 0 -45 29 19 14 22 43 47 56 -26 -45 43 11 -45 15 29 -46 7 55 -44 50 56 -143 0 0 -45 27 46 14 22 45 48 55 -25 -45 41 38 -45 13 56 -46 6 22 -44 49 22 -142 0 0 -45 25 56 14 22 48 48 54 -25 -45 39 48 -45 12 6 -46 4 33 -44 47 32 -141 0 0 -45 23 50 14 22 50 49 53 -24 -45 37 42 -45 9 59 -46 2 27 -44 45 24 -140 0 0 -45 21 26 14 22 53 50 52 -23 -45 35 19 -45 7 36 -46 0 5 -44 43 0 -139 0 0 -45 18 47 14 22 55 50 50 -22 -45 32 39 -45 4 55 -45 57 26 -44 40 20 -138 0 0 -45 15 50 14 22 58 51 49 -22 -45 29 43 -45 1 58 -45 54 31 -44 37 22 -137 0 0 -45 12 37 14 23 0 51 48 -21 -45 26 30 -44 58 45 -45 51 18 -44 34 8 -136 0 0 -45 9 7 14 23 3 52 47 -20 -45 23 1 -44 55 14 -45 47 49 -44 30 36 -135 0 0 -45 5 20 14 23 6 52 45 -20 -45 19 14 -44 51 27 -45 44 4 -44 26 48 -134 0 0 -45 1 16 14 23 8 53 44 -19 -45 15 11 -44 47 23 -45 40 2 -44 22 43 -133 0 0 -44 56 56 14 23 11 54 43 -18 -45 10 51 -44 43 2 -45 35 43 -44 18 21 -132 0 0 -44 52 18 14 23 14 54 41 -17 -45 6 15 -44 38 24 -45 31 7 -44 13 42 -131 0 0 -44 47 24 14 23 16 55 40 -17 -45 1 21 -44 33 29 -45 26 15 -44 8 47 -130 0 0 -44 42 14 14 23 19 55 38 -16 -44 56 11 -44 28 18 -45 21 6 -44 3 34 -129 0 0 -44 36 46 14 23 22 56 37 -15 -44 50 44 -44 22 49 -45 15 40 -43 58 4 -128 0 0 -44 31 1 14 23 25 56 35 -14 -44 45 0 -44 17 4 -45 9 57 -43 52 18 -127 0 0 -44 25 0 14 23 28 57 34 -14 -44 38 59 -44 11 2 -45 3 58 -43 46 14 -126 0 0 -44 18 41 14 23 30 57 32 -13 -44 32 42 -44 4 43 -44 57 42 -43 39 54 -125 0 0 -44 12 6 14 23 33 58 31 -12 -44 26 7 -43 58 6 -44 51 9 -43 33 16 -124 0 0 -44 5 14 14 23 36 58 29 -12 -44 19 16 -43 51 13 -44 44 19 -43 26 22 -123 0 0 -43 58 4 14 23 39 58 27 -11 -44 12 7 -43 44 3 -44 37 12 -43 19 10 -122 0 0 -43 50 38 14 23 42 59 26 -10 -44 4 42 -43 36 36 -44 29 48 -43 11 41 -121 0 0 -43 42 55 14 23 45 59 24 -9 -43 57 0 -43 28 52 -44 22 7 -43 3 56 -120 0 0 -43 34 55 14 23 48 60 22 -9 -43 49 1 -43 20 51 -44 14 10 -42 55 53 -119 0 0 -43 26 38 14 23 51 60 20 -8 -43 40 44 -43 12 33 -44 5 56 -42 47 33 -118 0 0 -43 18 4 14 23 54 61 19 -7 -43 32 11 -43 3 58 -43 57 24 -42 38 57 -117 0 0 -43 9 13 14 23 57 61 17 -6 -43 23 21 -42 55 6 -43 48 36 -42 30 3 -116 0 0 -43 0 5 14 24 0 61 15 -6 -43 14 14 -42 45 57 -43 39 31 -42 20 52 -115 0 0 -42 50 40 14 24 3 62 13 -5 -43 4 50 -42 36 31 -43 30 9 -42 11 24 -114 0 0 -42 40 58 14 24 6 62 11 -4 -42 55 9 -42 26 48 -43 20 30 -42 1 39 -113 0 0 -42 30 59 14 24 9 62 9 -3 -42 45 12 -42 16 48 -43 10 34 -41 51 37 -112 0 0 -42 20 43 14 24 13 62 7 -3 -42 34 57 -42 6 31 -43 0 21 -41 41 18 -111 0 0 -42 10 10 14 24 16 63 5 -2 -42 24 25 -41 55 57 -42 49 51 -41 30 42 -110 0 0 -41 59 20 14 24 19 63 3 -1 -42 13 37 -41 45 6 -42 39 5 -41 19 50 -109 0 0 -41 48 14 14 24 22 63 0 0 -42 2 31 -41 33 58 -42 28 1 -41 8 40 Uncertainty in time = +/- 2 secs [Prediction of 2008 Apr 13.0] Data for the target star ------------------------ * name: TYC 5819-00239-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 55 12.4209 DE: -14 56 09.630 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .020 ) * V mag [mag]: 10.8 * B mag [mag]: 11.4 * Apparent position with proper motion RA(deg): 343.9139800961 DE(deg): -14.8906053094 * Equation of equinoxes (radians) : 0.000039497368841 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1096) Reunerta approx. diameter [km]: 46 approx. diameter ["]: .031 distance from Earth [AU]: 2.06800 * orbital information: orbit source: Preston date of fit: 2008 Apr 08 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 792 number of rejected observations: 71 time covered by the observations: 1928 Jul 21 - 2007 Aug 15 1 sigma uncertainty ellipse (major, minor, PA): 0.033, 0.019, 71° remarks: * orbital elements for (1096) Reunerta : Mean anomaly = 348.71455411 deg Arg. of pericenter = 246.93567555 deg Long. of node = 81.50714556 deg Inclination = 9.48778254 deg Eccentricity = 0.19237192 Semimajor axis = 2.60145945 AU Perihelion dist = 2.10101170 AU Mag: H = 10.68, G = 0.15 Epoch of elements : MJD 54604.60000000 TDT (2008 May 18.600) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 18 1096 Reunerta 14h 24.8m UT 10.8 22 55 12.421-14 56 9.63TYC 5819-00239-1 11.4 14.7 46 1.7 2.068 4.327 13.88 -109.0336 -14.940 -37.08 19.72 14.4128 0.09585 -0.42726 14.74958 3.26556 -0.00467 -0.00209 2000 347.6340252008 514.00000246.935676 81.507146 9.4877830.19237192 2.6014595 2.101011710.3 5.00.15 RATE 2.3489760 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.039 0.028 76 1.89 0.028 0 54569.5020080518_0239-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 13, 03:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org