IOTA/IOTA-ES occultation update for (5264) Telephus / HIP 8048 event on 2009 Dec 03, 18:56 UT Visible from Summary ------- On 2009 Dec 03 UT, the 73 km diameter asteroid (5264) Telephus will occult a 10.4 mag star in the constellation Sculptor for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.7 mag to 17.1 mag (the magnitude of the asteroid) for at most 5.5 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 9 * date and approx. time of event: 2009 Dec 03, 18:51 - 2009 Dec 03, 19:06 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 6.7 * estimated maximum duration [s]: 5.5 * Moon: 97 % sunlit, 84° distance * Sun: 113° distance * rough path description: Additional comments ------------------- close double star The occultation path -------------------- * approximate projected width [km]: 73 * 1 sigma uncertainty interval [path widths]: +/- 7.13 * 1 sigma uncertainty interval [seconds]: +/- 23.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .160 +/- .079) * 1 sigma uncertainty ellipse (major, minor, PA): ( .164", .071", 77° ) * approx speed of asteroid's shadow [km/s]: 13.3149 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 8048 by 5264 Telephus on 2009 Dec 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 ' " Longitude Longitude Longitude Longitude - 33 54 38 39 0 0 19 6 23 2 131 -3 - 33 15 56 - 34 33 41 - 24 36 34 ... .. .. - 32 27 37 38 0 0 19 6 23 3 131 -4 - 31 50 12 - 33 5 20 - 23 25 48 ... .. .. - 31 4 44 37 0 0 19 6 22 5 132 -4 - 30 28 30 - 31 41 16 - 22 17 41 ... .. .. - 29 45 35 36 0 0 19 6 21 6 133 -5 - 29 10 23 - 30 21 2 - 21 12 1 - 39 21 50 - 28 29 47 35 0 0 19 6 19 7 134 -5 - 27 55 33 - 29 4 16 - 20 8 34 - 37 47 18 - 27 17 3 34 0 0 19 6 18 9 135 -6 - 26 43 40 - 27 50 37 - 19 7 10 - 36 17 45 - 26 7 4 33 0 0 19 6 16 10 135 -6 - 25 34 30 - 26 39 50 - 18 7 39 - 34 52 36 - 24 59 39 32 0 0 19 6 14 12 136 -7 - 24 27 48 - 25 31 40 - 17 9 53 - 33 31 24 - 23 54 32 31 0 0 19 6 11 13 136 -7 - 23 23 22 - 24 25 52 - 16 13 44 - 32 13 44 - 22 51 34 30 0 0 19 6 9 14 137 -8 - 22 21 1 - 23 22 16 - 15 19 4 - 30 59 17 - 21 50 34 29 0 0 19 6 6 16 137 -8 - 21 20 36 - 22 20 41 - 14 25 46 - 29 47 45 - 20 51 23 28 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49 -69 54 38 Uncertainty in time = +/- 42 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 8048 * constellation : Sculptor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 43 20.3176 DE: -29 24 49.354 * position source: mpos:UCAC2 pm:UCAC2 plx:HIP2 * standard error: RA,DE ["]: ( .032, .023 ) * V mag [mag]: 10.4 * B mag [mag]: 10.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5264) Telephus approx. diameter [km]: 73 approx. diameter ["]: .021 distance from Earth [AU]: 4.73800 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: MPC (via Astdys) number of used observations: 447 number of rejected observations: 21 time covered by the observations: 1965 Jan 01 - 2007 Sep 17 1 sigma uncertainty ellipse (major, minor, PA): 0.161, 0.067, 76° remarks: * orbital elements for (5264) Telephus : Mean anomaly = 276.45297176 deg Arg. of pericenter = 358.43017050 deg Long. of node = 121.90500843 deg Inclination = 33.57153666 deg Eccentricity = 0.11172936 Semimajor axis = 5.20525242 AU Perihelion dist = 4.62367288 AU Mag: H = 9.39, G = 0.15 Epoch of elements : MJD 55168.79000000 TDT (2009 Dec 03.790) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 3 5264 Telephus 18h 58.5m UT 10.4 1 43 20.318-29 24 49.35HIP 8048 10.7 17.1 73 5.5 4.738 -0.637 11.20 28.4834 -29.417 -107.12 -22.20 18.9743 -0.08494 -0.06330 -4.48615 6.02947 0.00395 0.00401 2000 275.72346420091125.00000358.430170121.905008 33.5715370.11172936 5.2052524 4.6236729 9.5 5.00.15 RATE 0.8299300 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.164 0.071 77 8.13 0.151 0 54786.5020091203_P_8048 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 18:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org