IOTA/IOTA-ES occultation update for (1390) Abastumani / TYC 4974-00488-1 event on 2009 Jan 05, 17:58 UT Visible from Summary ------- On 2009 Jan 05 UT, the 102 km diameter asteroid (1390) Abastumani will occult a 9.4 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 6.4 mag to 15.8 mag (the magnitude of the asteroid) for at most 4.6 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: 88 * date and approx. time of event: 2009 Jan 05, 17:54 - 2009 Jan 05, 17:57 UT * magnitude of target star: 9.4 * magnitude drop [mag]: 6.4 * estimated maximum duration [s]: 4.6 * Moon: 64 % sunlit, 169° distance * Sun: 75° distance * rough path description: Additional comments ------------------- 4.3" double star The occultation path -------------------- * approximate projected width [km]: 115 * 1 sigma uncertainty interval [path widths]: +/- 0.55 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .021", 108° ) * approx speed of asteroid's shadow [km/s]: 21.9474 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4974-00488-1 by 1390 Abastumani on 2009 Jan 5 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 116 0 0 55 8 10 17 54 37 0 102 -53 54 36 28 55 40 1 54 1 46 56 15 14 117 0 0 55 0 41 17 54 37 1 103 -53 54 28 55 55 32 36 53 54 10 56 7 53 118 0 0 54 52 51 17 54 37 2 104 -53 54 21 2 55 24 50 53 46 12 56 0 12 119 0 0 54 44 40 17 54 37 2 105 -52 54 12 47 55 16 43 53 37 54 55 52 9 120 0 0 54 36 9 17 54 38 3 105 -52 54 4 11 55 8 15 53 29 13 55 43 46 121 0 0 54 27 16 17 54 38 3 106 -52 53 55 14 54 59 27 53 20 12 55 35 2 122 0 0 54 18 1 17 54 38 4 107 -51 53 45 55 54 50 16 53 10 48 55 25 57 123 0 0 54 8 25 17 54 38 5 108 -51 53 36 15 54 40 45 53 1 3 55 16 30 124 0 0 53 58 27 17 54 39 5 109 -51 53 26 12 54 30 52 52 50 55 55 6 42 125 0 0 53 48 7 17 54 39 6 109 -50 53 15 48 54 20 36 52 40 25 54 56 32 126 0 0 53 37 25 17 54 39 6 110 -50 53 5 0 54 9 59 52 29 33 54 46 1 127 0 0 53 26 20 17 54 40 7 111 -50 52 53 51 53 58 59 52 18 18 54 35 7 128 0 0 53 14 53 17 54 40 8 112 -49 52 42 18 53 47 37 52 6 40 54 23 50 129 0 0 53 3 2 17 54 41 8 113 -49 52 30 23 53 35 52 51 54 39 54 12 11 130 0 0 52 50 49 17 54 41 9 113 -48 52 18 4 53 23 44 51 42 15 54 0 9 131 0 0 52 38 13 17 54 42 10 114 -48 52 5 22 53 11 13 51 29 27 53 47 45 132 0 0 52 25 13 17 54 42 10 115 -48 51 52 17 52 58 19 51 16 15 53 34 56 133 0 0 52 11 49 17 54 43 11 116 -47 51 38 48 52 45 1 51 2 40 53 21 45 134 0 0 51 58 1 17 54 44 12 117 -47 51 24 54 52 31 19 50 48 40 53 8 10 135 0 0 51 43 50 17 54 45 12 118 -46 51 10 37 52 17 13 50 34 17 52 54 10 136 0 0 51 29 14 17 54 45 13 118 -46 50 55 55 52 2 43 50 19 28 52 39 47 137 0 0 51 14 13 17 54 46 13 119 -45 50 40 48 51 47 49 50 4 15 52 24 59 138 0 0 50 58 48 17 54 47 14 120 -45 50 25 17 51 32 30 49 48 38 52 9 47 139 0 0 50 42 58 17 54 48 15 121 -44 50 9 21 51 16 46 49 32 35 51 54 10 140 0 0 50 26 43 17 54 49 16 122 -44 49 52 59 51 0 37 49 16 7 51 38 8 141 0 0 50 10 2 17 54 50 16 122 -43 49 36 13 50 44 3 48 59 13 51 21 41 142 0 0 49 52 56 17 54 51 17 123 -43 49 19 0 50 27 3 48 41 54 51 4 49 143 0 0 49 35 24 17 54 53 18 124 -42 49 1 22 50 9 38 48 24 9 50 47 30 144 0 0 49 17 26 17 54 54 18 125 -42 48 43 18 49 51 46 48 5 58 50 29 46 145 0 0 48 59 3 17 54 55 19 126 -41 48 24 48 49 33 29 47 47 21 50 11 37 146 0 0 48 40 13 17 54 57 20 126 -41 48 5 52 49 14 46 47 28 18 49 53 1 147 0 0 48 20 57 17 54 58 21 127 -40 47 46 29 48 55 36 47 8 49 49 33 58 148 0 0 48 1 14 17 55 0 21 128 -39 47 26 41 48 36 1 46 48 53 49 14 30 149 0 0 47 41 5 17 55 1 22 129 -39 47 6 25 48 15 58 46 28 30 48 54 34 150 0 0 47 20 30 17 55 3 23 130 -38 46 45 43 47 55 29 46 7 41 48 34 13 151 0 0 46 59 27 17 55 5 23 130 -38 46 24 34 47 34 33 45 46 26 48 13 24 152 0 0 46 37 58 17 55 6 24 131 -37 46 2 59 47 13 10 45 24 43 47 52 8 153 0 0 46 16 2 17 55 8 25 132 -36 45 40 57 46 51 21 45 2 34 47 30 26 154 0 0 45 53 40 17 55 10 26 133 -36 45 18 28 46 29 4 44 39 59 47 8 17 155 0 0 45 30 50 17 55 12 27 134 -35 44 55 32 46 6 21 44 16 56 46 45 40 156 0 0 45 7 33 17 55 14 27 134 -34 44 32 9 45 43 11 43 53 27 46 22 37 157 0 0 44 43 50 17 55 17 28 135 -34 44 8 20 45 19 33 43 29 31 45 59 7 158 0 0 44 19 40 17 55 19 29 136 -33 43 44 4 44 55 29 43 5 9 45 35 10 159 0 0 43 55 3 17 55 21 30 137 -32 43 19 21 44 30 59 42 40 20 45 10 46 160 0 0 43 30 0 17 55 24 30 138 -31 42 54 12 44 6 1 42 15 5 44 45 55 161 0 0 43 4 31 17 55 26 31 139 -31 42 28 37 43 40 38 41 49 24 44 20 37 162 0 0 42 38 35 17 55 29 32 140 -30 42 2 36 43 14 47 41 23 17 43 54 53 163 0 0 42 12 13 17 55 31 33 140 -29 41 36 9 42 48 31 40 56 44 43 28 43 164 0 0 41 45 26 17 55 34 34 141 -28 41 9 17 42 21 49 40 29 46 43 2 7 165 0 0 41 18 13 17 55 37 35 142 -27 40 41 59 41 54 41 40 2 22 42 35 5 166 0 0 40 50 35 17 55 40 35 143 -27 40 14 16 41 27 8 39 34 34 42 7 38 167 0 0 40 22 33 17 55 43 36 144 -26 39 46 9 40 59 10 39 6 22 41 39 45 168 0 0 39 54 6 17 55 46 37 145 -25 39 17 37 40 30 48 38 37 46 41 11 27 169 0 0 39 25 15 17 55 49 38 146 -24 38 48 42 40 2 1 38 8 46 40 42 46 170 0 0 38 56 0 17 55 52 39 147 -23 38 19 23 39 32 51 37 39 23 40 13 40 171 0 0 38 26 23 17 55 56 40 148 -22 37 49 42 39 3 17 37 9 38 39 44 11 172 0 0 37 56 23 17 55 59 40 149 -21 37 19 39 38 33 21 36 39 30 39 14 19 173 0 0 37 26 1 17 56 3 41 150 -21 36 49 14 38 3 3 36 9 2 38 44 4 174 0 0 36 55 18 17 56 6 42 151 -20 36 18 28 37 32 23 35 38 12 38 13 28 175 0 0 36 24 15 17 56 10 43 152 -19 35 47 21 37 1 22 35 7 3 37 42 30 176 0 0 35 52 51 17 56 14 44 153 -18 35 15 55 36 30 2 34 35 34 37 11 13 177 0 0 35 21 9 17 56 18 45 154 -17 34 44 11 35 58 22 34 3 47 36 39 35 178 0 0 34 49 8 17 56 22 46 155 -16 34 12 8 35 26 23 33 31 42 36 7 39 179 0 0 34 16 50 17 56 26 46 156 -15 33 39 48 34 54 7 32 59 20 35 35 25 180 0 0 33 44 15 17 56 30 47 157 -14 33 7 12 34 21 33 32 26 42 35 2 53 -179 0 0 33 11 24 17 56 35 48 158 -13 32 34 20 33 48 44 31 53 49 34 30 5 -178 0 0 32 38 19 17 56 39 49 160 -12 32 1 14 33 15 39 31 20 42 33 57 1 -177 0 0 32 5 0 17 56 43 50 161 -11 31 27 54 32 42 21 30 47 22 33 23 43 -176 0 0 31 31 28 17 56 48 50 162 -10 30 54 21 32 8 49 30 13 49 32 50 12 -175 0 0 30 57 44 17 56 52 51 164 -9 30 20 38 31 35 5 29 40 5 32 16 28 -174 0 0 30 23 49 17 56 57 52 165 -8 29 46 43 31 1 10 29 6 11 31 42 33 -173 0 0 29 49 45 17 57 2 53 166 -7 29 12 39 30 27 5 28 32 8 31 8 27 -172 0 0 29 15 32 17 57 7 54 168 -6 28 38 28 29 52 52 27 57 57 30 34 13 -171 0 0 28 41 12 17 57 12 54 170 -5 28 4 8 29 18 30 27 23 39 29 59 50 -170 0 0 28 6 45 17 57 17 55 171 -4 27 29 43 28 44 2 26 49 16 29 25 20 -169 0 0 27 32 14 17 57 22 56 173 -3 26 55 14 28 9 29 26 14 48 28 50 45 -168 0 0 26 57 38 17 57 27 56 174 -2 26 20 40 27 34 51 25 40 16 28 16 5 -167 0 0 26 23 0 17 57 32 57 176 -1 25 46 4 27 0 11 25 5 43 27 41 22 Uncertainty in time = +/- 4 secs [Prediction of 2008 Nov 4.0] Data for the target star ------------------------ * name: TYC 4974-00488-1 * constellation : Virgo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 13 59 04.7375 DE: -06 36 42.102 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .018 ) * V mag [mag]: 9.4 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1390) Abastumani approx. diameter [km]: 102 approx. diameter ["]: .039 distance from Earth [AU]: 3.64200 * orbital information: orbit source: Preston date of fit: 2008 Apr 24 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 752 number of rejected observations: 52 time covered by the observations: 1929 Oct 26 - 2008 Mar 13 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.012, 131° remarks: * orbital elements for (1390) Abastumani : Mean anomaly = 191.22142010 deg Arg. of pericenter = 333.48479263 deg Long. of node = 29.26669691 deg Inclination = 19.98453498 deg Eccentricity = 0.02715389 Semimajor axis = 3.43395266 AU Perihelion dist = 3.34070750 AU Mag: H = 9.03, G = 0.15 Epoch of elements : MJD 54836.74900000 TDT (2009 Jan 05.749) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jan 5 1390 Abastumani 17h 58.9m UT 9.4 13 59 4.738- 6 36 42.10TYC 4974-00488-1 10.5 15.8 102 4.6 3.642 1.775 -13.96 -165.4151 -6.608 -88.32 -22.53 17.9816 0.21697 0.41121 10.95641 -5.78041 -0.00549 0.00217 2000 190.17609320081230.00000333.484793 29.266697 19.9845350.02715389 3.4339527 3.3407075 9.4 5.00.15 RATE 1.5488620 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.031 0.021 108 1.55 0.021 0 54774.5020090105_0488-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 04, 05:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org