IOTA/IOTA-ES occultation update for (2617) Jiangxi / TYC 2456-00375-1 event on 2010 Jan 03, 23:06 UT Visible from Arabia, Europe Summary ------- On 2010 Jan 03 UT, the 53 km diameter asteroid (2617) Jiangxi will occult a 11.2 mag star in the constellation Gemini for observers along a path across Arabia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.7 mag to 13.9 mag (the magnitude of the asteroid) for at most 4.7 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: 51 * date and approx. time of event: 2010 Jan 03, 22:56 - 2010 Jan 03, 23:15 UT * magnitude of target star: 11.2 * magnitude drop [mag]: 2.7 * estimated maximum duration [s]: 4.7 * Moon: 85 % sunlit, 43° distance * Sun: 168° distance * rough path description: Arabia, Europe The occultation path -------------------- * approximate projected width [km]: 53 * 1 sigma uncertainty interval [path widths]: +/- 1.25 * 1 sigma uncertainty interval [seconds]: +/- 7.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .086 +/- .049) * 1 sigma uncertainty ellipse (major, minor, PA): ( .086", .049", 89° ) * approx speed of asteroid's shadow [km/s]: 11.2764 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2456-00375-1 by 2617 Jiangxi on 2010 Jan 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 ' " Latitude Latitude Latitude Latitude - 88 0 0 24 33 36 23 15 19 0 53 -1 24 51 35 24 15 37 25 36 33 .. .. .. - 87 0 0 25 14 37 23 15 19 1 53 -2 25 32 30 24 56 44 26 17 13 24 12 0 - 86 0 0 25 54 45 23 15 19 3 54 -3 26 12 33 25 36 58 26 57 0 24 52 30 - 85 0 0 26 34 2 23 15 18 4 54 -4 26 51 43 26 16 21 27 35 55 25 32 8 - 84 0 0 27 12 26 23 15 17 5 55 -5 27 30 1 26 54 52 28 13 58 26 10 54 - 83 0 0 27 49 59 23 15 16 6 55 -6 28 7 28 27 32 30 28 51 10 26 48 48 - 82 0 0 28 26 40 23 15 15 7 56 -7 28 44 3 28 9 17 29 27 30 27 25 50 - 81 0 0 29 2 30 23 15 14 8 56 -8 29 19 47 28 45 13 30 2 58 28 2 1 - 80 0 0 29 37 28 23 15 12 9 57 -9 29 54 39 29 20 18 30 37 36 28 37 20 - 79 0 0 30 11 36 23 15 11 10 57 -10 30 28 41 29 54 31 31 11 23 29 11 49 - 78 0 0 30 44 54 23 15 9 11 58 -11 31 1 53 30 27 55 31 44 21 29 45 27 - 77 0 0 31 17 22 23 15 7 12 58 -12 31 34 15 31 0 29 32 16 28 30 18 15 - 76 0 0 31 49 0 23 15 5 13 59 -13 32 5 48 31 32 13 32 47 47 30 50 13 - 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2009 Nov 24 1 sigma uncertainty ellipse (major, minor, PA): 0.084, 0.045, 89° remarks: * orbital elements for (2617) Jiangxi : Mean anomaly = 28.10226285 deg Arg. of pericenter = 348.73895527 deg Long. of node = 73.62004284 deg Inclination = 12.90187221 deg Eccentricity = 0.23024559 Semimajor axis = 3.16226920 AU Perihelion dist = 2.43417066 AU Mag: H = 10.35, G = 0.15 Epoch of elements : MJD 55199.96300000 TDT (2010 Jan 03.963) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Jan 3 2617 Jiangxi 23h 5.9m UT 11.2 7 24 41.196 33 26 49.22TYC 2456-00375-1 11.9 13.9 53 4.7 1.602 -2.448 16.77 21.2344 33.442 -165.30 -22.76 23.0984 0.00637 0.01165 -5.58201 3.05793 -0.00066 -0.00106 2000 26.35605520091225.00000348.738955 73.620043 12.9018720.23024559 3.1622692 2.434170710.4 5.00.15 RATE 1.7526930 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.086 0.049 89 2.25 0.057 0 055192.0020100103_0375-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Dec 27, 12:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org