IOTA/IOTA-ES occultation update for (5931) Zhvanetskij / TYC 4752-01122-1 event on 2008 Dec 02, 19:23 UT Visible from Russia, SW Asia, Africa Summary ------- On 2008 Dec 02 UT, the 17 km diameter asteroid (5931) Zhvanetskij will occult a 10.3 mag star in the constellation Orion for observers along a path across Russia, SW Asia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.3 mag (the magnitude of the asteroid) for at most 1.5 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: 10 * date and approx. time of event: 2008 Dec 02, 19:17 - 2008 Dec 02, 19:28 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 1.5 * Moon: 21 % sunlit, 129° distance * Sun: 155° distance * rough path description: Russia, SW Asia, Africa The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 6.93 * 1 sigma uncertainty interval [seconds]: +/- 13.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .134 +/- .080) * 1 sigma uncertainty ellipse (major, minor, PA): ( .134", .079", 94° ) * approx speed of asteroid's shadow [km/s]: 10.9543 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4752-01122-1 by 5931 Zhvanetskij on 2008 Dec 2 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 152 27 3 80 0 0 19 17 11 3 254 -23 149 25 30 156 7 6 124 23 1 ... .. .. 136 22 6 79 0 0 19 17 15 6 238 -26 134 47 39 138 0 42 117 2 2 ... .. .. Latitude Latitude Latitude Latitude 135 0 0 78 52 39 19 17 15 6 236 -26 79 1 8 78 44 11 81 2 7 .. .. .. 134 0 0 78 47 1 19 17 16 6 235 -26 78 55 33 78 38 31 80 57 18 .. .. .. 133 0 0 78 41 10 19 17 16 7 234 -26 78 49 45 78 32 36 80 52 17 .. .. .. 132 0 0 78 35 5 19 17 17 7 233 -27 78 43 43 78 26 28 80 47 4 .. .. .. 131 0 0 78 28 46 19 17 17 7 232 -27 78 37 28 78 20 6 80 41 38 .. .. .. 130 0 0 78 22 13 19 17 18 7 231 -27 78 30 58 78 13 29 80 36 0 .. .. .. 129 0 0 78 15 24 19 17 18 7 231 -27 78 24 13 78 6 38 80 30 8 76 8 14 128 0 0 78 8 21 19 17 19 8 230 -28 78 17 13 77 59 31 80 24 3 76 0 22 127 0 0 78 1 2 19 17 19 8 229 -28 78 9 58 77 52 8 80 17 43 75 52 13 126 0 0 77 53 27 19 17 20 8 228 -28 78 2 27 77 44 29 80 11 9 75 43 48 125 0 0 77 45 35 19 17 20 8 227 -28 77 54 39 77 36 34 80 4 20 75 35 4 124 0 0 77 37 27 19 17 21 9 226 -29 77 46 34 77 28 22 79 57 15 75 26 2 123 0 0 77 29 1 19 17 22 9 225 -29 77 38 12 77 19 52 79 49 54 75 16 42 122 0 0 77 20 17 19 17 22 9 224 -29 77 29 32 77 11 4 79 42 17 75 7 3 121 0 0 77 11 14 19 17 23 9 223 -29 77 20 34 77 1 57 79 34 22 74 57 5 120 0 0 77 1 53 19 17 24 10 222 -30 77 11 17 76 52 31 79 26 10 74 46 47 119 0 0 76 52 12 19 17 25 10 221 -30 77 1 40 76 42 46 79 17 40 74 36 8 118 0 0 76 42 10 19 17 25 10 220 -30 76 51 43 76 32 40 79 8 50 74 25 8 117 0 0 76 31 48 19 17 26 10 219 -30 76 41 25 76 22 14 78 59 41 74 13 47 116 0 0 76 21 5 19 17 27 11 218 -31 76 30 47 76 11 26 78 50 12 74 2 4 115 0 0 76 10 0 19 17 28 11 217 -31 76 19 46 76 0 17 78 40 22 73 49 58 114 0 0 75 58 32 19 17 29 11 216 -31 76 8 23 75 48 45 78 30 10 73 37 29 113 0 0 75 46 42 19 17 30 12 215 -32 75 56 37 75 36 49 78 19 36 73 24 37 112 0 0 75 34 27 19 17 31 12 214 -32 75 44 27 75 24 30 78 8 39 73 11 21 111 0 0 75 21 48 19 17 33 12 213 -32 75 31 53 75 11 46 77 57 19 72 57 40 110 0 0 75 8 44 19 17 34 13 212 -33 75 18 53 74 58 38 77 45 33 72 43 33 109 0 0 74 55 14 19 17 35 13 211 -33 75 5 28 74 45 3 77 33 23 72 29 1 108 0 0 74 41 18 19 17 36 13 210 -33 74 51 36 74 31 2 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28 13 54 .. .. .. - 7 0 0 26 12 14 19 28 44 6 93 -25 26 19 55 26 4 34 28 8 53 .. .. .. - 8 0 0 26 8 1 19 28 45 5 93 -24 26 15 42 26 0 22 28 4 36 .. .. .. - 9 0 0 26 4 31 19 28 46 4 92 -23 26 12 12 25 56 52 28 1 2 .. .. .. - 10 0 0 26 1 44 19 28 47 3 92 -22 26 9 24 25 54 5 27 58 13 .. .. .. - 11 0 0 25 59 39 19 28 48 2 91 -21 26 7 19 25 52 0 27 56 7 .. .. .. - 12 0 0 25 58 16 19 28 48 1 91 -20 26 5 57 25 50 37 27 54 45 .. .. .. - 13 0 0 25 57 37 19 28 49 1 90 -20 26 5 17 25 49 58 27 54 7 .. .. .. Uncertainty in time = +/- 15 secs [Prediction of 2008 Nov 26.0] Data for the target star ------------------------ * name: TYC 4752-01122-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 21 26.2413 DE: -00 10 22.798 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 10.3 * B mag [mag]: 11.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5931) Zhvanetskij approx. diameter [km]: 17 approx. diameter ["]: .014 distance from Earth [AU]: 1.68700 * orbital information: orbit source: Preston date of fit: 2008 Oct 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 549 number of rejected observations: 4 time covered by the observations: 1976 Apr 01 - 2008 Oct 24 1 sigma uncertainty ellipse (major, minor, PA): 0.133, 0.077, 94° remarks: * orbital elements for (5931) Zhvanetskij : Mean anomaly = 342.99111969 deg Arg. of pericenter = 266.59438655 deg Long. of node = 195.91670203 deg Inclination = 16.88242257 deg Eccentricity = 0.19172765 Semimajor axis = 3.18515662 AU Perihelion dist = 2.57447403 AU Mag: H = 11.78, G = 0.15 Epoch of elements : MJD 54802.80800000 TDT (2008 Dec 02.808) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Dec 2 5931 Zhvanetskij 19h 23.0m UT 10.3 5 21 26.241- 0 10 22.80TYC 4752-01122-1 11.1 15.3 17 1.5 1.687 -1.913 -14.69 77.6116 -0.168 -113.32 -22.09 19.3828 -0.36361 0.70973 -5.50268 -2.81944 -0.00102 0.00223 2000 342.50425920081130.00000266.594387195.916702 16.8824230.19172765 3.1851566 2.574474011.5 5.00.15 RATE 1.7338350 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.134 0.079 94 7.93 0.096 0 54796.5020081202_1122-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 26, 23:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org