IOTA/IOTA-ES occultation update for (1074) Beljawskya / TYC 1896-01836-1 event on 2009 Feb 08, 17:35 UT Visible from Summary ------- On 2009 Feb 08 UT, the 48 km diameter asteroid (1074) Beljawskya will occult a 10.0 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.3 mag (the magnitude of the asteroid) for at most 7.6 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: 73 * date and approx. time of event: 2009 Feb 08, 17:21 - 2009 Feb 08, 17:47 UT * magnitude of target star: 10.0 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 7.6 * Moon: 99 % sunlit, 22° distance * Sun: 146° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 58 * 1 sigma uncertainty interval [path widths]: +/- 0.78 * 1 sigma uncertainty interval [seconds]: +/- 8.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .043 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .043", .027", 95° ) * approx speed of asteroid's shadow [km/s]: 6.3148 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1896-01836-1 by 1074 Beljawskya on 2009 Feb 8 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 11 0 0 -15 51 47 17 47 18 27 52 0 -15 35 16 -16 8 21 -15 9 37 -16 34 19 12 0 0 -15 33 53 17 47 8 28 52 -1 -15 17 25 -15 50 25 -14 51 49 -16 16 19 13 0 0 -15 16 25 17 46 59 29 52 -2 -14 59 58 -15 32 54 -14 34 27 -15 58 44 14 0 0 -14 59 21 17 46 49 30 51 -3 -14 42 57 -15 15 48 -14 17 29 -15 41 34 15 0 0 -14 42 42 17 46 38 30 51 -4 -14 26 21 -14 59 7 -14 0 56 -15 24 50 16 0 0 -14 26 29 17 46 28 31 50 -5 -14 10 9 -14 42 51 -13 44 48 -15 8 31 17 0 0 -14 10 41 17 46 17 32 50 -6 -13 54 24 -14 27 1 -13 29 6 -14 52 37 18 0 0 -13 55 18 17 46 6 33 49 -7 -13 39 3 -14 11 36 -13 13 49 -14 37 9 19 0 0 -13 40 22 17 45 55 34 49 -8 -13 24 9 -13 56 38 -12 58 57 -14 22 7 20 0 0 -13 25 51 17 45 44 35 48 -9 -13 9 40 -13 42 5 -12 44 32 -14 7 31 21 0 0 -13 11 46 17 45 32 36 48 -10 -12 55 37 -13 27 58 -12 30 32 -13 53 20 22 0 0 -12 58 7 17 45 20 36 47 -11 -12 42 0 -13 14 17 -12 16 57 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21 58 -11 53 47 -10 57 17 -12 18 44 77 0 0 -11 48 26 17 31 27 53 342 -55 -11 32 32 -12 4 24 -11 7 49 -12 29 23 78 0 0 -11 59 27 17 31 12 52 341 -55 -11 43 31 -12 15 26 -11 18 46 -12 40 28 79 0 0 -12 10 53 17 30 56 52 340 -55 -11 54 56 -12 26 53 -11 30 8 -12 51 58 80 0 0 -12 22 45 17 30 41 51 339 -56 -12 6 46 -12 38 46 -11 41 56 -13 3 53 81 0 0 -12 35 1 17 30 25 51 338 -56 -12 19 1 -12 51 5 -11 54 8 -13 16 14 82 0 0 -12 47 43 17 30 10 50 337 -57 -12 31 41 -13 3 49 -12 6 46 -13 29 1 83 0 0 -13 0 51 17 29 55 50 335 -57 -12 44 47 -13 16 58 -12 19 49 -13 42 12 84 0 0 -13 14 23 17 29 39 49 334 -57 -12 58 17 -13 30 32 -12 33 17 -13 55 49 85 0 0 -13 28 20 17 29 24 49 333 -58 -13 12 12 -13 44 30 -12 47 9 -14 9 51 86 0 0 -13 42 41 17 29 10 48 332 -58 -13 26 32 -13 58 54 -13 1 26 -14 24 18 87 0 0 -13 57 28 17 28 55 47 331 -58 -13 41 16 -14 13 42 -13 16 7 -14 39 9 88 0 0 -14 12 39 17 28 40 47 330 -58 -13 56 25 -14 28 55 -13 31 13 -14 54 25 89 0 0 -14 28 14 17 28 26 46 329 -58 -14 11 59 -14 44 32 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48 9 17 23 11 23 312 -49 -23 30 47 -24 5 34 -23 3 49 -24 32 54 117 0 0 -24 13 17 17 23 3 22 311 -49 -23 55 52 -24 30 45 -23 28 50 -24 58 9 118 0 0 -24 38 39 17 22 55 21 311 -48 -24 21 12 -24 56 10 -23 54 6 -25 23 38 119 0 0 -25 4 15 17 22 48 21 310 -47 -24 46 46 -25 21 49 -24 19 36 -25 49 21 120 0 0 -25 30 5 17 22 41 20 310 -47 -25 12 33 -25 47 41 -24 45 19 -26 15 17 121 0 0 -25 56 7 17 22 34 19 309 -46 -25 38 32 -26 13 45 -25 11 15 -26 41 25 122 0 0 -26 22 21 17 22 27 18 309 -45 -26 4 44 -26 40 2 -25 37 23 -27 7 46 123 0 0 -26 48 46 17 22 21 17 308 -44 -26 31 7 -27 6 30 -26 3 43 -27 34 17 124 0 0 -27 15 22 17 22 16 16 308 -43 -26 57 41 -27 33 8 -26 30 13 -28 0 59 125 0 0 -27 42 8 17 22 10 15 307 -43 -27 24 25 -27 59 57 -26 56 53 -28 27 51 126 0 0 -28 9 4 17 22 5 14 307 -42 -27 51 18 -28 26 54 -27 23 43 -28 54 52 127 0 0 -28 36 7 17 22 0 13 306 -41 -28 18 19 -28 54 0 -27 50 41 -29 22 2 128 0 0 -29 3 19 17 21 56 12 306 -40 -28 45 29 -29 21 14 -28 17 47 -29 49 19 129 0 0 -29 30 38 17 21 52 11 305 -39 -29 12 45 -29 48 34 -28 45 1 -30 16 43 130 0 0 -29 58 2 17 21 48 10 305 -38 -29 40 8 -30 16 1 -29 12 21 -30 44 13 131 0 0 -30 25 33 17 21 45 9 304 -38 -30 7 37 -30 43 33 -29 39 46 -31 11 48 132 0 0 -30 53 8 17 21 42 8 304 -37 -30 35 10 -31 11 10 -30 7 17 -31 39 28 133 0 0 -31 20 47 17 21 39 7 303 -36 -31 2 47 -31 38 51 -30 34 51 -32 7 11 134 0 0 -31 48 29 17 21 37 6 303 -35 -31 30 27 -32 6 34 -31 2 29 -32 34 57 135 0 0 -32 16 13 17 21 35 5 302 -34 -31 58 10 -32 34 20 -31 30 10 -33 2 45 136 0 0 -32 43 59 17 21 33 4 302 -33 -32 25 55 -33 2 7 -31 57 52 -33 30 35 137 0 0 -33 11 45 17 21 32 3 301 -32 -32 53 40 -33 29 55 -32 25 35 -33 58 25 138 0 0 -33 39 31 17 21 31 2 301 -31 -33 21 25 -33 57 43 -32 53 18 -34 26 14 139 0 0 -34 7 17 17 21 30 1 300 -30 -33 49 9 -34 25 29 .. .. .. -34 54 2 140 0 0 -34 35 0 17 21 30 0 299 -30 -34 16 51 -34 53 13 .. .. .. -35 21 48 Uncertainty in time = +/- 9 secs [Prediction of 2008 Nov 6.0] Data for the target star ------------------------ * name: TYC 1896-01836-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 08 57.0990 DE: +23 38 57.044 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .016 ) * V mag [mag]: 10.0 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1074) Beljawskya approx. diameter [km]: 48 approx. diameter ["]: .035 distance from Earth [AU]: 1.91600 * orbital information: orbit source: Preston date of fit: 2008 Nov 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 945 number of rejected observations: 61 time covered by the observations: 1923 Oct 08 - 2008 Jan 19 1 sigma uncertainty ellipse (major, minor, PA): 0.040, 0.022, 96° remarks: * orbital elements for (1074) Beljawskya : Mean anomaly = 40.46924196 deg Arg. of pericenter = 23.24790027 deg Long. of node = 38.17813690 deg Inclination = 0.80279242 deg Eccentricity = 0.17446806 Semimajor axis = 3.15680335 AU Perihelion dist = 2.60604201 AU Mag: H = 10.10, G = 0.15 Epoch of elements : MJD 54870.73300000 TDT (2009 Feb 08.733) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Feb 8 1074 Beljawskya 17h 35.5m UT 10.0 7 8 57.099 23 38 57.04TYC 1896-01836-1 10.6 14.3 48 7.6 1.916 -1.185 1.34 64.4027 23.648 -80.33 -14.78 17.5919 -0.04623 -0.55111 -3.55220 0.29281 0.00328 -0.00049 2000 40.3404362009 2 8.00000 23.247900 38.178137 0.8027920.17446806 3.1568034 2.606042010.0 5.00.15 RATE 1.7572470 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.043 0.027 95 1.78 0.027 0 54776.5020090208_1836-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 06, 05:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org