IOTA/IOTA-ES occultation update for (820) Adriana / TYC 1354-00438-1 event on 2009 Jan 01, 15:56 UT Visible from Summary ------- On 2009 Jan 01 UT, the 59 km diameter asteroid (820) Adriana will occult a 12.2 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 3.5 mag to 15.6 mag (the magnitude of the asteroid) for at most 4.1 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: 70 * date and approx. time of event: 2009 Jan 01, 15:49 - 2009 Jan 01, 16:03 UT * magnitude of target star: 12.2 * magnitude drop [mag]: 3.5 * estimated maximum duration [s]: 4.1 * Moon: 23 % sunlit, 130° distance * Sun: 173° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 65 * 1 sigma uncertainty interval [path widths]: +/- 0.83 * 1 sigma uncertainty interval [seconds]: +/- 4.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .044 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .044", .028", 92° ) * approx speed of asteroid's shadow [km/s]: 14.2403 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1354-00438-1 by 820 Adriana on 2009 Jan 1 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 22 0 0 35 55 10 16 3 15 0 65 -7 36 14 34 35 35 50 36 46 52 .. .. .. 23 0 0 36 18 7 16 3 15 1 65 -8 36 37 29 35 58 49 37 9 45 35 26 53 24 0 0 36 40 46 16 3 14 2 66 -9 37 0 6 36 21 29 37 32 19 35 49 36 25 0 0 37 3 6 16 3 14 3 67 -10 37 22 24 36 43 51 37 54 34 36 12 1 26 0 0 37 25 7 16 3 14 4 67 -11 37 44 23 37 5 54 38 16 29 36 34 7 27 0 0 37 46 49 16 3 13 5 68 -11 38 6 3 37 27 38 38 38 6 36 55 54 28 0 0 38 8 11 16 3 12 6 68 -12 38 27 23 37 49 2 38 59 23 37 17 21 29 0 0 38 29 14 16 3 12 6 69 -13 38 48 24 38 10 7 39 20 20 37 38 29 30 0 0 38 49 56 16 3 11 7 70 -14 39 9 4 38 30 51 39 40 57 37 59 18 31 0 0 39 10 19 16 3 10 8 70 -15 39 29 25 38 51 16 40 1 15 38 19 46 32 0 0 39 30 22 16 3 9 9 71 -16 39 49 26 39 11 21 40 21 12 38 39 54 33 0 0 39 50 4 16 3 7 10 72 -16 40 9 6 39 31 6 40 40 48 38 59 42 34 0 0 40 9 26 16 3 6 11 72 -17 40 28 26 39 50 30 41 0 5 39 19 10 35 0 0 40 28 28 16 3 5 11 73 -18 40 47 25 40 9 34 41 19 0 39 38 17 36 0 0 40 47 9 16 3 3 12 74 -19 41 6 4 40 28 17 41 37 36 39 57 4 37 0 0 41 5 29 16 3 2 13 74 -20 41 24 22 40 46 40 41 55 50 40 15 30 38 0 0 41 23 29 16 3 0 14 75 -21 41 42 20 41 4 41 42 13 44 40 33 36 39 0 0 41 41 8 16 2 58 15 76 -21 41 59 57 41 22 23 42 31 17 40 51 21 40 0 0 41 58 26 16 2 57 15 76 -22 42 17 13 41 39 43 42 48 29 41 8 45 41 0 0 42 15 24 16 2 55 16 77 -23 42 34 8 41 56 42 43 5 20 41 25 48 42 0 0 42 32 0 16 2 53 17 78 -24 42 50 42 42 13 21 43 21 51 41 42 30 43 0 0 42 48 16 16 2 51 18 78 -24 43 6 55 42 29 39 43 38 1 41 58 52 44 0 0 43 4 11 16 2 49 19 79 -25 43 22 48 42 45 36 43 53 50 42 14 52 45 0 0 43 19 45 16 2 47 19 80 -26 43 38 20 43 1 12 44 9 18 42 30 32 46 0 0 43 34 58 16 2 44 20 81 -27 43 53 31 43 16 28 44 24 25 42 45 51 47 0 0 43 49 50 16 2 42 21 81 -27 44 8 21 43 31 22 44 39 12 43 0 49 48 0 0 44 4 22 16 2 40 22 82 -28 44 22 51 43 45 56 44 53 38 43 15 27 49 0 0 44 18 33 16 2 37 22 83 -29 44 37 0 44 0 9 45 7 43 43 29 43 50 0 0 44 32 24 16 2 35 23 83 -30 44 50 48 44 14 2 45 21 28 43 43 39 51 0 0 44 45 53 16 2 32 24 84 -30 45 4 16 44 27 34 45 34 52 43 57 15 52 0 0 44 59 3 16 2 30 24 85 -31 45 17 23 44 40 45 45 47 56 44 10 29 53 0 0 45 11 51 16 2 27 25 86 -32 45 30 10 44 53 36 46 0 39 44 23 23 54 0 0 45 24 20 16 2 24 26 87 -32 45 42 36 45 6 6 46 13 2 44 35 57 55 0 0 45 36 28 16 2 22 27 87 -33 45 54 42 45 18 16 46 25 5 44 48 10 56 0 0 45 48 15 16 2 19 27 88 -34 46 6 28 45 30 6 46 36 47 45 0 3 57 0 0 45 59 43 16 2 16 28 89 -34 46 17 53 45 41 35 46 48 9 45 11 36 58 0 0 46 10 50 16 2 13 29 90 -35 46 28 59 45 52 45 46 59 12 45 22 48 59 0 0 46 21 38 16 2 10 29 91 -36 46 39 44 46 3 34 47 9 54 45 33 40 60 0 0 46 32 5 16 2 7 30 91 -37 46 50 10 46 14 3 47 20 17 45 44 12 61 0 0 46 42 13 16 2 4 31 92 -37 47 0 16 46 24 12 47 30 20 45 54 25 62 0 0 46 52 0 16 2 1 31 93 -38 47 10 2 46 34 2 47 40 3 46 4 17 63 0 0 47 1 28 16 1 58 32 94 -38 47 19 28 46 43 31 47 49 26 46 13 49 64 0 0 47 10 37 16 1 55 33 95 -39 47 28 35 46 52 41 47 58 30 46 23 2 65 0 0 47 19 26 16 1 51 33 96 -40 47 37 22 47 1 32 48 7 15 46 31 55 66 0 0 47 27 55 16 1 48 34 96 -40 47 45 50 47 10 3 48 15 40 46 40 28 67 0 0 47 36 5 16 1 45 35 97 -41 47 53 58 47 18 14 48 23 46 46 48 42 68 0 0 47 43 55 16 1 41 35 98 -42 48 1 47 47 26 6 48 31 33 46 56 36 69 0 0 47 51 27 16 1 38 36 99 -42 48 9 17 47 33 39 48 39 0 47 4 11 70 0 0 47 58 39 16 1 35 37 100 -43 48 16 28 47 40 52 48 46 9 47 11 27 71 0 0 48 5 32 16 1 31 37 101 -44 48 23 20 47 47 47 48 52 59 47 18 24 72 0 0 48 12 6 16 1 28 38 102 -44 48 29 53 47 54 22 48 59 30 47 25 1 73 0 0 48 18 21 16 1 24 38 103 -45 48 36 7 48 0 38 49 5 42 47 31 19 74 0 0 48 24 18 16 1 20 39 104 -45 48 42 2 48 6 36 49 11 35 47 37 19 75 0 0 48 29 55 16 1 17 40 105 -46 48 47 39 48 12 15 49 17 10 47 42 59 76 0 0 48 35 14 16 1 13 40 106 -46 48 52 57 48 17 34 49 22 26 47 48 20 77 0 0 48 40 14 16 1 10 41 106 -47 48 57 56 48 22 36 49 27 23 47 53 23 78 0 0 48 44 56 16 1 6 41 107 -48 49 2 37 48 27 18 49 32 3 47 58 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23 56 24 -168 0 0 24 21 2 15 51 3 33 279 -28 24 40 38 24 1 30 25 13 18 23 29 10 -167 0 0 23 53 45 15 50 59 32 280 -27 24 13 20 23 34 13 24 45 59 23 1 54 -166 0 0 23 26 25 15 50 54 31 281 -26 23 46 0 23 6 54 24 18 38 22 34 37 -165 0 0 22 59 5 15 50 50 30 281 -25 23 18 39 22 39 34 23 51 15 22 7 18 -164 0 0 22 31 44 15 50 45 29 282 -24 22 51 17 22 12 14 23 23 52 21 40 0 -163 0 0 22 4 24 15 50 41 28 282 -23 22 23 56 21 44 55 22 56 30 21 12 42 -162 0 0 21 37 5 15 50 37 27 283 -22 21 56 36 21 17 37 22 29 8 20 45 25 -161 0 0 21 9 47 15 50 33 26 283 -21 21 29 18 20 50 20 22 1 48 20 18 10 -160 0 0 20 42 32 15 50 29 25 284 -20 21 2 2 20 23 7 21 34 30 19 50 58 -159 0 0 20 15 21 15 50 26 24 284 -19 20 34 49 19 55 56 21 7 15 19 23 50 -158 0 0 19 48 13 15 50 22 23 284 -18 20 7 40 19 28 50 20 40 5 18 56 45 -157 0 0 19 21 11 15 50 19 22 285 -17 19 40 36 19 1 48 20 12 58 18 29 46 -156 0 0 18 54 13 15 50 15 21 285 -16 19 13 37 18 34 52 19 45 57 18 2 52 -155 0 0 18 27 22 15 50 12 20 286 -14 18 46 45 18 8 3 19 19 2 17 36 5 -154 0 0 18 0 38 15 50 9 19 286 -13 18 19 59 17 41 20 18 52 14 17 9 24 -153 0 0 17 34 1 15 50 6 18 286 -12 17 53 21 17 14 45 18 25 33 16 42 52 -152 0 0 17 7 33 15 50 3 17 287 -11 17 26 51 16 48 18 17 59 1 16 16 27 -151 0 0 16 41 13 15 50 1 16 287 -10 17 0 30 16 22 0 17 32 37 15 50 12 -150 0 0 16 15 4 15 49 58 15 287 -9 16 34 19 15 55 52 17 6 23 15 24 7 -149 0 0 15 49 5 15 49 56 14 288 -8 16 8 18 15 29 55 16 40 19 14 58 12 -148 0 0 15 23 16 15 49 54 13 288 -7 15 42 28 15 4 8 16 14 26 14 32 29 -147 0 0 14 57 40 15 49 52 12 288 -6 15 16 50 14 38 34 15 48 45 14 6 57 -146 0 0 14 32 16 15 49 50 11 288 -5 14 51 24 14 13 11 15 23 16 13 41 38 -145 0 0 14 7 5 15 49 49 10 289 -4 14 26 11 13 48 2 14 58 0 13 16 32 -144 0 0 13 42 8 15 49 47 9 289 -3 14 1 12 13 23 7 14 32 57 12 51 40 -143 0 0 13 17 25 15 49 46 8 289 -2 13 36 27 12 58 26 14 8 9 12 27 2 -142 0 0 12 52 57 15 49 45 7 289 -1 13 11 57 12 34 0 13 43 36 12 2 40 Uncertainty in time = +/- 5 secs [Prediction of 2008 Nov 4.0] Data for the target star ------------------------ * name: TYC 1354-00438-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 16 45.3666 DE: +20 23 47.719 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .018, .017 ) * V mag [mag]: 12.2 * B mag [mag]: 12.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (820) Adriana approx. diameter [km]: 59 approx. diameter ["]: .035 distance from Earth [AU]: 2.30400 * orbital information: orbit source: Preston date of fit: 2008 Nov 03 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 974 number of rejected observations: 44 time covered by the observations: 1916 Mar 30 - 2008 Feb 02 1 sigma uncertainty ellipse (major, minor, PA): 0.040, 0.023, 92° remarks: * orbital elements for (820) Adriana : Mean anomaly = 159.81413978 deg Arg. of pericenter = 185.58504167 deg Long. of node = 118.57112583 deg Inclination = 5.93778235 deg Eccentricity = 0.05138367 Semimajor axis = 3.13052838 AU Perihelion dist = 2.96967033 AU Mag: H = 10.32, G = 0.15 Epoch of elements : MJD 54832.66400000 TDT (2009 Jan 01.664) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jan 1 820 Adriana 15h 56.5m UT 12.2 7 16 45.367 20 23 47.72TYC 1354-00438-1 12.1 15.6 59 4.1 2.304 -2.120 7.25 128.6361 20.395 -58.18 -22.95 15.9412 0.09875 0.40592 -7.80995 1.89948 -0.00065 0.00028 2000 159.34010320081230.00000185.585042118.571126 5.9377820.05138367 3.1305284 2.969670311.0 5.00.15 RATE 1.7794170 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.044 0.028 92 1.83 0.029 0 54774.5020090101_0438-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 04, 05:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org