IOTA/IOTA-ES occultation update for (965) Angelica / TYC 7893-01686-1 event on 2009 Jun 05, 01:24 UT Visible from Summary ------- On 2009 Jun 05 UT, the 54 km diameter asteroid (965) Angelica will occult a 11.5 mag star in the constellation Scorpius 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 15.7 mag (the magnitude of the asteroid) for at most 3.1 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: 44 * date and approx. time of event: 2009 Jun 05, 01:18 - 2009 Jun 05, 01:30 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 3.1 * Moon: 93 % sunlit, 45° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 1.47 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .042 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .043", .033", 102° ) * approx speed of asteroid's shadow [km/s]: 17.3217 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7893-01686-1 by 965 Angelica on 2009 Jun 5 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 -113 0 0 -15 29 45 1 30 42 1 135 -6 -15 9 7 -15 50 25 .. .. .. -16 51 11 -112 0 0 -16 27 9 1 30 41 2 134 -7 -16 6 35 -16 47 44 -15 6 9 -17 48 16 -111 0 0 -17 23 50 1 30 41 4 134 -8 -17 3 20 -17 44 19 -16 3 9 -18 44 37 -110 0 0 -18 19 45 1 30 40 5 134 -10 -17 59 21 -18 40 9 -16 59 24 -19 40 12 -109 0 0 -19 14 53 1 30 39 6 134 -11 -18 54 34 -19 35 12 -17 54 53 -20 34 59 -108 0 0 -20 9 12 1 30 38 8 133 -12 -19 48 59 -20 29 25 -18 49 35 -21 28 56 -107 0 0 -21 2 40 1 30 37 9 133 -13 -20 42 33 -21 22 48 -19 43 26 -22 22 1 -106 0 0 -21 55 17 1 30 36 10 132 -14 -21 35 16 -22 15 18 -20 36 27 -23 14 14 -105 0 0 -22 47 1 1 30 34 11 132 -15 -22 27 6 -23 6 56 -21 28 35 -24 5 33 -104 0 0 -23 37 50 1 30 33 13 132 -17 -23 18 1 -23 57 39 -22 19 49 -24 55 57 -103 0 0 -24 27 44 1 30 31 14 131 -18 -24 8 2 -24 47 27 -23 10 9 -25 45 26 -102 0 0 -25 16 43 1 30 29 15 131 -19 -24 57 7 -25 36 19 -23 59 34 -26 33 58 -101 0 0 -26 4 45 1 30 27 16 130 -20 -25 45 16 -26 24 14 -24 48 2 -27 21 34 -100 0 0 -26 51 50 1 30 25 17 130 -21 -26 32 28 -27 11 12 -25 35 34 -28 8 12 - 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9 32 25 -12 15 40 55 0 0 - 9 54 35 1 19 8 27 226 -17 - 9 33 50 -10 15 21 - 8 32 52 -11 16 26 56 0 0 - 8 54 49 1 19 4 26 226 -16 - 8 34 1 - 9 15 36 - 7 32 57 -10 16 47 57 0 0 - 7 54 41 1 19 0 25 226 -15 - 7 33 52 - 8 15 30 - 6 32 43 - 9 16 47 58 0 0 - 6 54 16 1 18 57 23 226 -14 - 6 33 26 - 7 15 7 - 5 32 12 - 8 16 27 59 0 0 - 5 53 36 1 18 53 22 226 -12 - 5 32 45 - 6 14 28 - 4 31 29 - 7 15 51 60 0 0 - 4 52 45 1 18 50 20 226 -11 - 4 31 53 - 5 13 38 - 3 30 35 - 6 15 3 61 0 0 - 3 51 46 1 18 47 19 226 -10 - 3 30 54 - 4 12 39 - 2 29 36 - 5 14 5 62 0 0 - 2 50 43 1 18 44 18 225 -8 - 2 29 51 - 3 11 35 - 1 28 32 - 4 13 1 63 0 0 - 1 49 38 1 18 41 16 225 -7 - 1 28 46 - 2 10 30 - 0 27 30 - 3 11 54 64 0 0 - 0 48 35 1 18 39 15 225 -6 - 0 27 44 - 1 9 26 0 33 30 - 2 10 47 65 0 0 0 12 23 1 18 37 13 225 -5 0 33 12 - 0 8 27 1 34 23 - 1 9 44 66 0 0 1 13 12 1 18 35 12 225 -3 1 33 59 0 52 24 2 35 5 - 0 8 49 67 0 0 2 13 49 1 18 33 11 225 -2 2 34 34 1 53 3 3 35 34 0 51 56 68 0 0 3 14 10 1 18 31 9 225 -1 3 34 54 2 53 27 4 35 46 1 52 27 Uncertainty in time = +/- 6 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 7893-01686-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 46 56.7391 DE: -43 02 40.822 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .026 ) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (965) Angelica approx. diameter [km]: 54 approx. diameter ["]: .024 distance from Earth [AU]: 3.09200 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 566 number of rejected observations: 27 time covered by the observations: 1927 Dec 18 - 2008 Feb 18 1 sigma uncertainty ellipse (major, minor, PA): 0.036, 0.021, 107° remarks: * orbital elements for (965) Angelica : Mean anomaly = 175.64133830 deg Arg. of pericenter = 47.12630811 deg Long. of node = 41.56522217 deg Inclination = 21.46888931 deg Eccentricity = 0.28557708 Semimajor axis = 3.14630848 AU Perihelion dist = 2.24779488 AU Mag: H = 10.16, G = 0.15 Epoch of elements : MJD 54987.05900000 TDT (2009 Jun 05.059) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 5 965 Angelica 1h 24.6m UT 11.5 17 46 56.739-43 2 40.82TYC 7893-01686-1 11.8 15.7 54 3.1 3.092 -2.428 -8.04 -8.0198 -43.042 158.47 22.54 1.4095 0.01834 -0.06011 -9.35807 -2.83079 -0.00123 0.00191 2000 174.3946862009 529.00000 47.126308 41.565222 21.4688890.28557708 3.1463085 2.2477949 9.8 5.00.15 RATE 1.7660460 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.043 0.033 102 2.47 0.035 0 54545.5020090605_1686-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 08:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org