IOTA/IOTA-ES occultation update for (3012) Minsk / TYC 2399-00381-1 event on 2009 Aug 07, 03:24 UT Visible from Summary ------- On 2009 Aug 07 UT, the 64 km diameter asteroid (3012) Minsk will occult a 10.3 mag star in the constellation Auriga for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.8 mag to 17.1 mag (the magnitude of the asteroid) for at most 1.9 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: 61 * date and approx. time of event: 2009 Aug 07, 03:22 - 2009 Aug 07, 03:23 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 6.8 * estimated maximum duration [s]: 1.9 * Moon: 99 % sunlit, 109° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 69 * 1 sigma uncertainty interval [path widths]: +/- 1.02 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .026", 82° ) * approx speed of asteroid's shadow [km/s]: 33.2134 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2399-00381-1 by 3012 Minsk on 2009 Aug 7 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 - 24 0 0 3 3 38 3 22 8 1 53 -59 2 39 50 3 27 32 .. .. .. 4 16 33 - 23 0 0 3 50 26 3 22 8 2 53 -57 3 26 29 4 14 29 .. .. .. 5 3 50 - 22 0 0 4 38 0 3 22 9 3 53 -56 4 13 53 5 2 12 .. .. .. 5 51 53 - 21 0 0 5 26 18 3 22 9 4 53 -55 5 2 2 5 50 40 4 12 48 6 40 41 - 20 0 0 6 15 21 3 22 9 6 53 -53 5 50 55 6 39 52 5 1 22 7 30 13 - 19 0 0 7 5 5 3 22 10 7 53 -52 6 40 30 7 29 46 5 50 39 8 20 27 - 18 0 0 7 55 31 3 22 10 8 53 -51 7 30 47 8 20 22 6 40 37 9 11 21 - 17 0 0 8 46 36 3 22 11 9 53 -50 8 21 43 9 11 36 7 31 14 10 2 55 - 16 0 0 9 38 19 3 22 12 11 54 -48 9 13 16 10 3 28 8 22 29 10 55 6 - 15 0 0 10 30 37 3 22 13 12 54 -47 10 5 26 10 55 56 9 14 21 11 47 53 - 14 0 0 11 23 30 3 22 14 13 54 -46 10 58 9 11 48 57 10 6 46 12 41 13 - 13 0 0 12 16 54 3 22 15 15 54 -44 11 51 24 12 42 30 10 59 44 13 35 4 - 12 0 0 13 10 47 3 22 16 16 55 -43 12 45 9 13 36 32 11 53 12 14 29 24 - 11 0 0 14 5 7 3 22 18 17 55 -42 13 39 21 14 31 0 12 47 7 15 24 10 - 10 0 0 14 59 53 3 22 19 19 55 -40 14 33 58 15 25 54 13 41 28 16 19 20 - 9 0 0 15 55 0 3 22 21 20 55 -39 15 28 58 16 21 9 14 36 12 17 14 52 - 8 0 0 16 50 26 3 22 23 21 56 -38 16 24 17 17 16 43 15 31 16 18 10 42 - 7 0 0 17 46 9 3 22 25 23 56 -36 17 19 53 18 12 33 16 26 38 19 6 47 - 6 0 0 18 42 6 3 22 26 24 57 -35 18 15 43 19 8 37 17 22 14 20 3 5 - 5 0 0 19 38 14 3 22 28 25 57 -34 19 11 44 20 4 51 18 18 3 20 59 33 - 4 0 0 20 34 30 3 22 31 27 58 -32 20 7 54 21 1 13 19 14 0 21 56 8 - 3 0 0 21 30 50 3 22 33 28 58 -31 21 4 9 21 57 39 20 10 4 22 52 46 - 2 0 0 22 27 12 3 22 35 29 59 -30 22 0 25 22 54 6 21 6 10 23 49 24 - 1 0 0 23 23 33 3 22 37 30 59 -28 22 56 41 23 50 32 22 2 17 24 45 59 0 0 0 24 19 49 3 22 40 32 60 -27 23 52 53 24 46 52 22 58 20 25 42 28 1 0 0 25 15 57 3 22 42 33 60 -26 24 48 57 25 43 4 23 54 17 26 38 48 2 0 0 26 11 54 3 22 45 34 61 -25 25 44 51 26 39 4 24 50 4 27 34 55 3 0 0 27 7 37 3 22 48 35 62 -23 26 40 31 27 34 50 25 45 39 28 30 46 4 0 0 28 3 3 3 22 51 37 63 -22 27 35 55 28 30 18 26 40 58 29 26 19 5 0 0 28 58 8 3 22 53 38 63 -21 28 30 59 29 25 25 27 35 59 30 21 29 6 0 0 29 52 51 3 22 56 39 64 -20 29 25 41 30 20 9 28 30 39 31 16 15 7 0 0 30 47 8 3 22 59 40 65 -18 30 19 57 31 14 26 29 24 54 32 10 33 8 0 0 31 40 55 3 23 2 41 66 -17 31 13 45 32 8 14 30 18 42 33 4 21 9 0 0 32 34 12 3 23 5 43 67 -16 32 7 2 33 1 29 31 12 0 33 57 35 10 0 0 33 26 54 3 23 8 44 68 -15 32 59 46 33 54 10 32 4 46 34 50 13 11 0 0 34 19 0 3 23 11 45 69 -14 33 51 53 34 46 14 32 56 58 35 42 14 12 0 0 35 10 27 3 23 14 46 70 -12 34 43 23 35 37 39 33 48 32 36 33 33 13 0 0 36 1 14 3 23 17 47 71 -11 35 34 12 36 28 23 34 39 27 37 24 11 14 0 0 36 51 17 3 23 21 48 72 -10 36 24 19 37 18 23 35 29 41 38 14 4 15 0 0 37 40 36 3 23 24 49 74 -9 37 13 42 38 7 38 36 19 12 39 3 10 16 0 0 38 29 9 3 23 27 50 75 -8 38 2 19 38 56 6 37 7 58 39 51 29 17 0 0 39 16 54 3 23 30 51 76 -7 38 50 9 39 43 46 37 55 58 40 38 59 18 0 0 40 3 50 3 23 33 52 78 -6 39 37 10 40 30 37 38 43 9 41 25 38 19 0 0 40 49 55 3 23 36 53 79 -5 40 23 22 41 16 36 39 29 32 42 11 25 20 0 0 41 35 9 3 23 39 54 80 -4 41 8 42 42 1 44 40 15 5 42 56 20 21 0 0 42 19 31 3 23 43 54 82 -3 41 53 10 42 45 59 40 59 46 43 40 21 22 0 0 43 3 0 3 23 46 55 84 -2 42 36 46 43 29 21 41 43 36 44 23 28 23 0 0 43 45 35 3 23 49 56 85 -1 43 19 29 44 11 48 42 26 33 45 5 40 Uncertainty in time = +/- 3 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 2399-00381-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 55 19.7352 DE: +37 18 00.870 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .018, .017 ) * V mag [mag]: 10.3 * B mag [mag]: 13.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3012) Minsk approx. diameter [km]: 64 approx. diameter ["]: .026 distance from Earth [AU]: 3.42300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 470 number of rejected observations: 19 time covered by the observations: 1950 Sep 17 - 2007 Nov 21 1 sigma uncertainty ellipse (major, minor, PA): 0.037, 0.020, 80° remarks: * orbital elements for (3012) Minsk : Mean anomaly = 339.92874984 deg Arg. of pericenter = 88.43996863 deg Long. of node = 355.09501301 deg Inclination = 18.23210348 deg Eccentricity = 0.06510202 Semimajor axis = 3.22398220 AU Perihelion dist = 3.01409446 AU Mag: H = 10.97, G = 0.15 Epoch of elements : MJD 55050.14200000 TDT (2009 Aug 07.142) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 7 3012 Minsk 3h 25.1m UT 10.3 4 55 19.735 37 18 0.87TYC 2399-00381-1 13.1 17.1 64 1.9 3.423 3.808 15.96 66.7672 37.296 130.18 16.40 3.4182 -0.12733 0.36576 17.68691 6.21351 -0.00480 0.00020 2000 339.9045732009 8 7.00000 88.439969355.095013 18.2321030.06510202 3.2239822 3.014094411.1 5.00.15 RATE 1.7026100 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.026 82 2.02 0.026 0 54581.5020090807_0381-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org