IOTA/IOTA-ES occultation update for (1560) Strattonia / TYC 0582-00965-1 event on 2012 Sep 07, 09:29 UT Visible from S USA, Mexico, Hawaii Summary ------- On 2012 Sep 07 UT, the 26 km diameter asteroid (1560) Strattonia will occult a 10.1 mag star in the constellation Pisces for observers along a path across S USA, Mexico, Hawaii. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 14.0 mag (the magnitude of the asteroid) for at most 3.3 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: 52 * date and approx. time of event: 2012 Sep 07, 09:16 - 2012 Sep 07, 09:41 UT * geocentric midpoint of event [JD]: 2456177.89512083 * magnitude of target star: 10.1 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 3.3 * Moon: 61 % sunlit, 73° distance * Sun: 169° distance * rough path description: S USA, Mexico, Hawaii The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 1.22 * 1 sigma uncertainty interval [seconds]: +/- 6.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .055 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .058", .035", 67° ) * approx speed of asteroid's shadow [km/s]: 7.8263 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0582-00965-1 by 1560 Strattonia on 2012 Sep 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 125 0 0 5 56 3 9 41 58 1 85 0 6 3 27 5 48 40 6 21 31 5 30 39 126 0 0 6 1 47 9 41 58 2 85 -1 6 9 11 5 54 24 6 27 15 5 36 23 127 0 0 6 7 44 9 41 57 3 85 -2 6 15 8 6 0 20 6 33 12 5 42 19 128 0 0 6 13 52 9 41 56 4 85 -3 6 21 16 6 6 28 6 39 21 5 48 27 129 0 0 6 20 13 9 41 55 5 85 -4 6 27 37 6 12 49 6 45 42 5 54 47 130 0 0 6 26 45 9 41 54 6 85 -5 6 34 9 6 19 21 6 52 15 6 1 18 131 0 0 6 33 28 9 41 52 7 86 -6 6 40 53 6 26 4 6 58 59 6 8 1 132 0 0 6 40 23 9 41 50 8 86 -7 6 47 48 6 32 59 7 5 54 6 14 56 133 0 0 6 47 30 9 41 48 9 86 -8 6 54 54 6 40 5 7 13 1 6 22 2 134 0 0 6 54 47 9 41 46 10 86 -9 7 2 12 6 47 22 7 20 19 6 29 19 135 0 0 7 2 15 9 41 43 11 86 -10 7 9 40 6 54 51 7 27 48 6 36 46 136 0 0 7 9 54 9 41 40 12 86 -11 7 17 20 7 2 29 7 35 27 6 44 25 137 0 0 7 17 44 9 41 37 13 86 -12 7 25 9 7 10 19 7 43 17 6 52 14 138 0 0 7 25 44 9 41 34 14 86 -13 7 33 10 7 18 19 7 51 18 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46 39 - 78 0 0 29 12 50 9 17 36 27 260 -21 29 20 12 29 5 29 29 38 12 28 47 32 - 77 0 0 29 13 32 9 17 30 27 261 -20 29 20 54 29 6 10 29 38 53 28 48 14 - 76 0 0 29 14 2 9 17 25 26 261 -19 29 21 24 29 6 41 29 39 24 28 48 44 - 75 0 0 29 14 21 9 17 19 25 262 -19 29 21 43 29 6 59 29 39 42 28 49 3 - 74 0 0 29 14 28 9 17 14 24 262 -18 29 21 50 29 7 6 29 39 49 28 49 10 - 73 0 0 29 14 23 9 17 9 23 263 -17 29 21 45 29 7 2 29 39 44 28 49 6 - 72 0 0 29 14 7 9 17 4 22 263 -16 29 21 29 29 6 45 29 39 28 28 48 49 - 71 0 0 29 13 39 9 16 59 22 264 -15 29 21 1 29 6 17 29 39 0 28 48 21 - 70 0 0 29 12 59 9 16 55 21 264 -15 29 20 21 29 5 38 29 38 20 28 47 42 - 69 0 0 29 12 8 9 16 50 20 265 -14 29 19 30 29 4 46 29 37 29 28 46 50 - 68 0 0 29 11 5 9 16 46 19 265 -13 29 18 27 29 3 43 29 36 26 28 45 47 - 67 0 0 29 9 50 9 16 42 18 266 -12 29 17 12 29 2 28 29 35 11 28 44 32 - 66 0 0 29 8 23 9 16 38 17 266 -11 29 15 45 29 1 2 29 33 44 28 43 5 - 65 0 0 29 6 45 9 16 34 16 267 -10 29 14 7 28 59 23 29 32 6 28 41 27 - 64 0 0 29 4 54 9 16 31 16 267 -10 29 12 16 28 57 33 29 30 16 28 39 36 - 63 0 0 29 2 52 9 16 27 15 268 -9 29 10 14 28 55 31 29 28 14 28 37 34 - 62 0 0 29 0 39 9 16 24 14 268 -8 29 8 0 28 53 17 29 26 0 28 35 20 - 61 0 0 28 58 13 9 16 21 13 269 -7 29 5 35 28 50 51 29 23 35 28 32 54 - 60 0 0 28 55 35 9 16 18 12 269 -6 29 2 57 28 48 13 29 20 57 28 30 17 - 59 0 0 28 52 46 9 16 16 11 270 -5 29 0 8 28 45 24 29 18 8 28 27 27 - 58 0 0 28 49 45 9 16 13 10 270 -5 28 57 7 28 42 23 29 15 7 28 24 26 - 57 0 0 28 46 32 9 16 11 10 271 -4 28 53 54 28 39 10 29 11 54 28 21 12 - 56 0 0 28 43 7 9 16 9 9 271 -3 28 50 29 28 35 45 29 8 30 28 17 47 - 55 0 0 28 39 30 9 16 7 8 272 -2 28 46 53 28 32 8 29 4 53 28 14 10 - 54 0 0 28 35 42 9 16 5 7 272 -1 28 43 4 28 28 19 29 1 5 28 10 21 - 53 0 0 28 31 41 9 16 4 6 273 0 28 39 4 28 24 19 28 57 5 28 6 21 Uncertainty in time = +/- 6 secs Prediction of 2012 Aug 26.0 Data for the target star ------------------------ * name: TYC 0582-00965-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 07 14.0217 DE: +05 04 52.491 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .022 ) * V mag [mag]: 10.1 * B mag [mag]: 11.4 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1560) Strattonia approx. diameter [km]: 26 approx. diameter ["]: .030 distance from Earth [AU]: 1.19100 * orbital information: orbit source: Preston date of fit: 2012 Aug 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 980 number of rejected observations: 18 time covered by the observations: 1942 Dec 03 - 2012 Aug 10 1 sigma uncertainty ellipse (major, minor, PA): 0.054, 0.028, 63° remarks: * orbital elements for (1560) Strattonia : Mean anomaly = 336.27683133 deg Arg. of pericenter = 95.12924332 deg Long. of node = 289.15703860 deg Inclination = 6.28438470 deg Eccentricity = 0.21268151 Semimajor axis = 2.68418358 AU Perihelion dist = 2.11330736 AU Mag: H = 11.54, G = 0.15 Epoch of elements : MJD 56177.39500000 TDT (2012 Sep 07.395) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Sep 7 1560 Strattonia 9h 29.0m UT 10.1 23 7 14.022 5 4 52.49TYC 0582-00965-1 11.4 14.0 26 3.3 1.191 -2.142 -6.26 -142.3002 5.084 37.23 5.84 9.4829 -0.05579 0.28507 -4.33550 -0.84665 -0.00009 -0.00103 2000 334.6194442012 831.00000 95.129243289.157039 6.2843850.21268151 2.6841836 2.113307411.5 5.00.15 RATE 2.2412270 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.058 0.035 67 2.22 0.037 0 0-3 1 056165.0020120907_0965-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Aug 25, 22:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org