IOTA/IOTA-ES occultation update for (143) Adria / TYC 7871-01072-1 event on 2009 Jun 07, 22:57 UT Visible from Summary ------- On 2009 Jun 07 UT, the 89 km diameter asteroid (143) Adria 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 1.5 mag to 12.7 mag (the magnitude of the asteroid) for at most 8.6 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: 96 * date and approx. time of event: 2009 Jun 07, 22:47 - 2009 Jun 07, 23:07 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 1.5 * estimated maximum duration [s]: 8.6 * Moon: 100 % sunlit, 16° distance * Sun: 162° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 90 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .049 +/- .031) * 1 sigma uncertainty ellipse (major, minor, PA): ( .049", .031", 94° ) * approx speed of asteroid's shadow [km/s]: 10.3226 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7871-01072-1 by 143 Adria on 2009 Jun 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 - 67 0 0 16 18 27 23 7 58 1 133 -3 16 51 58 15 45 1 17 19 31 15 17 39 - 66 0 0 15 24 17 23 7 58 2 133 -4 15 57 49 14 50 49 16 25 23 14 23 25 - 65 0 0 14 29 48 23 7 57 4 134 -5 15 3 21 13 56 19 15 30 56 13 28 54 - 64 0 0 13 35 3 23 7 56 5 134 -7 14 8 37 13 1 33 14 36 12 12 34 9 - 63 0 0 12 40 5 23 7 55 6 134 -8 13 13 39 12 6 35 13 41 14 11 39 11 - 62 0 0 11 44 57 23 7 53 8 134 -9 12 18 30 11 11 28 12 46 5 10 44 4 - 61 0 0 10 49 41 23 7 51 9 135 -10 11 23 13 10 16 13 11 50 47 9 48 50 - 60 0 0 9 54 20 23 7 48 10 135 -12 10 27 50 9 20 54 10 55 23 8 53 32 - 59 0 0 8 58 57 23 7 45 12 135 -13 9 32 25 8 25 33 9 59 56 7 58 14 - 58 0 0 8 3 35 23 7 42 13 135 -14 8 37 0 7 30 14 9 4 28 7 2 56 - 57 0 0 7 8 16 23 7 39 14 135 -16 7 41 38 6 34 58 8 9 3 6 7 43 - 56 0 0 6 13 2 23 7 35 16 135 -17 6 46 21 5 39 48 7 13 43 5 12 37 - 55 0 0 5 17 58 23 7 31 17 135 -18 5 51 12 4 44 48 6 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232 -20 -15 28 56 -16 28 50 -15 4 18 -16 53 19 93 0 0 -15 17 27 22 48 1 17 231 -19 -14 47 18 -15 47 33 -14 22 32 -16 12 11 94 0 0 -14 35 10 22 47 58 15 231 -18 -14 4 50 -15 5 26 -13 39 56 -15 30 13 95 0 0 -13 52 3 22 47 54 14 231 -17 -13 21 33 -14 22 30 -12 56 30 -14 47 25 96 0 0 -13 8 7 22 47 51 13 231 -16 -12 37 26 -13 38 44 -12 12 14 -14 3 48 97 0 0 -12 23 22 22 47 48 12 231 -15 -11 52 31 -12 54 9 -11 27 10 -13 19 22 98 0 0 -11 37 48 22 47 46 11 230 -13 -11 6 47 -12 8 46 -10 41 17 -12 34 7 99 0 0 -10 51 27 22 47 43 9 230 -12 -10 20 15 -11 22 35 - 9 54 37 -11 48 5 100 0 0 -10 4 18 22 47 41 8 230 -11 - 9 32 56 -10 35 37 - 9 7 9 -11 1 15 101 0 0 - 9 16 24 22 47 40 7 230 -10 - 8 44 51 - 9 47 53 - 8 18 56 -10 13 39 102 0 0 - 8 27 44 22 47 38 6 230 -9 - 7 56 1 - 8 59 23 - 7 29 57 - 9 25 17 103 0 0 - 7 38 19 22 47 37 4 230 -7 - 7 6 26 - 8 10 8 - 6 40 15 - 8 36 11 104 0 0 - 6 48 12 22 47 36 3 229 -6 - 6 16 9 - 7 20 11 - 5 49 49 - 7 46 21 105 0 0 - 5 57 23 22 47 35 2 229 -5 - 5 25 11 - 6 29 32 - 4 58 43 - 6 55 50 106 0 0 - 5 5 54 22 47 35 0 229 -4 - 4 33 32 - 5 38 12 .. .. .. - 6 4 38 Uncertainty in time = +/- 6 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 7871-01072-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 41 21.0733 DE: -40 38 27.109 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .031, .026 ) * V mag [mag]: 11.5 * B mag [mag]: 12.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (143) Adria approx. diameter [km]: 89 approx. diameter ["]: .076 distance from Earth [AU]: 1.60900 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 812 number of rejected observations: 48 time covered by the observations: 1909 Sep 15 - 2008 Feb 13 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.017, 96° remarks: * orbital elements for (143) Adria : Mean anomaly = 26.68285331 deg Arg. of pericenter = 251.46608658 deg Long. of node = 333.22206130 deg Inclination = 11.47191813 deg Eccentricity = 0.07002864 Semimajor axis = 2.76129282 AU Perihelion dist = 2.56792323 AU Mag: H = 8.98, G = 0.15 Epoch of elements : MJD 54989.95700000 TDT (2009 Jun 07.957) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 7 143 Adria 22h 57.8m UT 11.5 16 41 21.073-40 38 27.11TYC 7871-01072-1 12.4 12.7 89 8.6 1.609 -2.709 7.96 9.4238 -40.643 -164.70 22.83 22.9630 0.03516 0.13656 -5.64197 1.45424 0.00050 0.00166 2000 24.5440842009 529.00000251.466087333.222061 11.4719180.07002864 2.7612928 2.5679232 9.1 5.00.15 RATE 2.1480050 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.049 0.031 94 1.41 0.032 0 54545.5020090607_1072-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 09:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org