IOTA/IOTA-ES occultation update for (1062) Ljuba / TYC 1892-00175-1 event on 2009 Oct 03, 08:02 UT Visible from Summary ------- On 2009 Oct 03 UT, the 55 km diameter asteroid (1062) Ljuba 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 4.9 mag to 15.2 mag (the magnitude of the asteroid) for at most 3.6 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: 69 * date and approx. time of event: 2009 Oct 03, 07:57 - 2009 Oct 03, 08:03 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 3.6 * Moon: 99 % sunlit, 97° distance * Sun: 93° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 87 * 1 sigma uncertainty interval [path widths]: +/- 0.85 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .024", 94° ) * approx speed of asteroid's shadow [km/s]: 15.4363 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1892-00175-1 by 1062 Ljuba on 2009 Oct 3 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 -148 59 29 39 0 0 7 57 45 0 52 -47 -148 11 22 -149 48 6 ... .. .. ... .. .. -147 26 1 40 0 0 7 57 46 2 53 -47 -146 38 11 -148 14 20 ... .. .. -149 37 38 Latitude Latitude Latitude Latitude -147 0 0 40 16 54 7 57 46 2 53 -47 39 45 51 40 48 25 .. .. .. 41 43 8 -146 0 0 40 56 14 7 57 47 3 54 -47 40 24 54 41 28 3 .. .. .. 42 23 16 -145 0 0 41 36 0 7 57 48 4 54 -47 41 4 23 42 8 6 .. .. .. 43 3 52 -144 0 0 42 16 11 7 57 49 5 55 -47 41 44 17 42 48 35 40 51 8 43 44 53 -143 0 0 42 56 46 7 57 50 6 56 -47 42 24 34 43 29 28 41 30 58 44 26 18 -142 0 0 43 37 42 7 57 51 7 56 -47 43 5 13 44 10 42 42 11 9 45 8 5 -141 0 0 44 18 58 7 57 53 8 57 -47 43 46 12 44 52 16 42 51 39 45 50 13 -140 0 0 45 0 32 7 57 55 9 58 -46 44 27 28 45 34 8 43 32 28 46 32 38 -139 0 0 45 42 22 7 57 57 10 59 -46 45 9 1 46 16 17 44 13 33 47 15 20 -138 0 0 46 24 26 7 57 59 11 59 -46 45 50 48 46 58 39 44 54 52 47 58 16 -137 0 0 47 6 42 7 58 1 12 60 -45 46 32 47 47 41 14 45 36 23 48 41 24 -136 0 0 47 49 8 7 58 4 13 61 -45 47 14 55 48 23 58 46 18 4 49 24 41 -135 0 0 48 31 42 7 58 6 14 62 -44 47 57 12 49 6 49 46 59 54 50 8 6 -134 0 0 49 14 20 7 58 9 15 63 -44 48 39 34 49 49 46 47 41 49 50 51 35 -133 0 0 49 57 2 7 58 12 16 63 -43 49 21 59 50 32 45 48 23 48 51 35 6 -132 0 0 50 39 44 7 58 15 17 64 -43 50 4 25 51 15 44 49 5 48 52 18 37 -131 0 0 51 22 25 7 58 19 18 65 -42 50 46 49 51 58 42 49 47 47 53 2 6 -130 0 0 52 5 0 7 58 22 19 66 -42 51 29 9 52 41 34 50 29 43 53 45 28 -129 0 0 52 47 29 7 58 26 20 67 -41 52 11 23 53 24 18 51 11 33 54 28 42 -128 0 0 53 29 49 7 58 29 20 68 -40 52 53 28 54 6 53 51 53 15 55 11 45 -127 0 0 54 11 56 7 58 33 21 69 -40 53 35 22 54 49 15 52 34 47 55 54 34 -126 0 0 54 53 49 7 58 37 22 70 -39 54 17 2 55 31 22 53 16 6 56 37 7 -125 0 0 55 35 25 7 58 41 23 71 -39 54 58 25 56 13 11 53 57 10 57 19 20 -124 0 0 56 16 41 7 58 45 23 72 -38 55 39 30 56 54 40 54 37 56 58 1 11 -123 0 0 56 57 35 7 58 49 24 73 -37 56 20 13 57 35 45 55 18 23 58 42 38 -122 0 0 57 38 5 7 58 53 25 74 -36 57 0 33 58 16 26 55 58 28 59 23 38 -121 0 0 58 18 9 7 58 57 26 75 -36 57 40 28 58 56 38 56 38 8 60 4 8 -120 0 0 58 57 43 7 59 2 26 76 -35 58 19 54 59 36 21 57 17 22 60 44 7 -119 0 0 59 36 46 7 59 6 27 78 -34 58 58 51 60 15 32 57 56 8 61 23 31 -118 0 0 60 15 17 7 59 10 28 79 -34 59 37 16 60 54 8 58 34 24 62 2 19 -117 0 0 60 53 12 7 59 14 28 80 -33 60 15 6 61 32 9 59 12 7 62 40 28 -116 0 0 61 30 31 7 59 19 29 81 -32 60 52 22 62 9 31 59 49 17 63 17 57 -115 0 0 62 7 11 7 59 23 29 82 -32 61 29 0 62 46 14 60 25 52 63 54 44 -114 0 0 62 43 11 7 59 28 30 83 -31 62 4 59 63 22 15 61 1 49 64 30 48 -113 0 0 63 18 30 7 59 32 30 85 -30 62 40 18 63 57 34 61 37 8 65 6 6 -112 0 0 63 53 7 7 59 36 31 86 -30 63 14 56 64 32 9 62 11 48 65 40 39 -111 0 0 64 27 0 7 59 40 31 87 -29 63 48 51 65 5 59 62 45 47 66 14 24 -110 0 0 65 0 8 7 59 45 32 88 -28 64 22 3 65 39 4 63 19 5 66 47 22 -109 0 0 65 32 31 7 59 49 32 90 -28 64 54 31 66 11 22 63 51 40 67 19 30 -108 0 0 66 4 8 7 59 53 33 91 -27 65 26 14 66 42 53 64 23 32 67 50 49 -107 0 0 66 34 59 7 59 57 33 92 -27 65 57 12 67 13 36 64 54 41 68 21 19 -106 0 0 67 5 4 8 0 1 33 93 -26 66 27 24 67 43 32 65 25 5 68 50 59 -105 0 0 67 34 21 8 0 5 34 95 -25 66 56 50 68 12 40 65 54 46 69 19 49 -104 0 0 68 2 52 8 0 9 34 96 -25 67 25 31 68 41 0 66 23 42 69 47 49 -103 0 0 68 30 36 8 0 13 34 97 -24 67 53 26 69 8 32 66 51 54 70 15 0 -102 0 0 68 57 33 8 0 17 35 99 -24 68 20 35 69 35 17 67 19 21 70 41 22 -101 0 0 69 23 44 8 0 20 35 100 -23 68 46 58 70 1 15 67 46 4 71 6 56 -100 0 0 69 49 9 8 0 24 35 101 -23 69 12 37 70 26 27 68 12 4 71 31 41 - 99 0 0 70 13 49 8 0 28 36 102 -22 69 37 31 70 50 52 68 37 19 71 55 39 - 98 0 0 70 37 45 8 0 31 36 104 -22 70 1 41 71 14 32 69 1 52 72 18 51 - 97 0 0 71 0 56 8 0 35 36 105 -21 70 25 7 71 37 28 69 25 42 72 41 17 - 96 0 0 71 23 25 8 0 38 36 106 -21 70 47 51 71 59 40 69 48 50 73 2 59 - 95 0 0 71 45 10 8 0 41 36 108 -20 71 9 52 72 21 8 70 11 17 73 23 57 - 94 0 0 72 6 15 8 0 45 37 109 -20 71 31 13 72 41 55 70 33 4 73 44 12 - 93 0 0 72 26 38 8 0 48 37 110 -19 71 51 53 73 2 1 70 54 10 74 3 46 - 92 0 0 72 46 22 8 0 51 37 111 -19 72 11 54 73 21 27 71 14 37 74 22 39 - 91 0 0 73 5 27 8 0 54 37 113 -18 72 31 16 73 40 14 71 34 27 74 40 53 - 90 0 0 73 23 54 8 0 57 37 114 -18 72 50 0 73 58 23 71 53 38 74 58 29 - 89 0 0 73 41 44 8 1 0 37 115 -17 73 8 7 74 15 55 72 12 13 75 15 28 - 88 0 0 73 58 58 8 1 2 38 117 -17 73 25 39 74 32 51 72 30 13 75 31 50 - 87 0 0 74 15 38 8 1 5 38 118 -17 73 42 36 74 49 12 72 47 38 75 47 38 - 86 0 0 74 31 43 8 1 8 38 119 -16 73 58 59 75 4 59 73 4 28 76 2 52 - 85 0 0 74 47 16 8 1 11 38 120 -16 74 14 49 75 20 14 73 20 46 76 17 33 - 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9 0 0 80 23 45 8 3 5 38 208 0 79 59 55 80 47 48 79 19 51 81 29 11 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1892-00175-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 33 51.2161 DE: +29 18 14.374 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .020 ) * V mag [mag]: 10.3 * B mag [mag]: 11.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1062) Ljuba approx. diameter [km]: 55 approx. diameter ["]: .029 distance from Earth [AU]: 2.58000 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 721 number of rejected observations: 94 time covered by the observations: 1927 Feb 09 - 2007 Jun 15 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.014, 96° remarks: * orbital elements for (1062) Ljuba : Mean anomaly = 354.87199990 deg Arg. of pericenter = 100.81625302 deg Long. of node = 341.50039764 deg Inclination = 5.60293706 deg Eccentricity = 0.06555386 Semimajor axis = 3.00625740 AU Perihelion dist = 2.80918561 AU Mag: H = 9.66, G = 0.15 Epoch of elements : MJD 55107.33500000 TDT (2009 Oct 03.335) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 3 1062 Ljuba 8h 2.1m UT 10.3 6 33 51.216 29 18 14.37TYC 1892-00175-1 11.2 15.2 55 3.6 2.580 2.261 2.69 -34.2270 29.304 56.74 -4.06 8.0352 -0.06968 0.77005 8.67701 0.78763 -0.00570 0.00030 2000 353.4850372009 926.00000100.816253341.500398 5.6029370.06555386 3.0062574 2.8091856 9.9 5.00.15 RATE 1.8908840 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.024 94 1.85 0.025 0 54581.5020091003_0175-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org