IOTA/IOTA-ES occultation update for (3019) Kulin / TYC 1406-01078-1 event on 2008 Feb 01, 22:40 UT Visible from S Africa Summary ------- On 2008 Feb 01 UT, the 15 km diameter asteroid (3019) Kulin will occult a 9.6 mag star in the constellation Leo for observers along a path across S Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.9 mag to 15.5 mag (the magnitude of the asteroid) for at most 1.2 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: 19 * date and approx. time of event: 2008 Feb 01, 22:33 - 2008 Feb 01, 22:46 UT * magnitude of target star: 9.6 * magnitude drop [mag]: 5.9 * estimated maximum duration [s]: 1.2 * Moon: 26 % sunlit, 114° distance * Sun: 174° distance * rough path description: S Africa The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 3.57 * 1 sigma uncertainty interval [seconds]: +/- 5.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .056 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .057", .039", 102° ) * approx speed of asteroid's shadow [km/s]: 12.2093 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1406-01078-1 by 3019 Kulin on 2008 Feb 01 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 - 54 0 0 -20 3 48 22 46 20 1 71 -7 -19 57 48 -20 9 49 .. .. .. -20 53 7 - 53 0 0 -19 45 2 22 46 19 2 70 -8 -19 39 3 -19 51 1 .. .. .. -20 34 9 - 52 0 0 -19 26 55 22 46 19 3 70 -9 -19 20 57 -19 32 53 .. .. .. -20 15 51 - 51 0 0 -19 9 27 22 46 18 4 70 -10 -19 3 31 -19 15 24 .. .. .. -19 58 12 - 50 0 0 -18 52 40 22 46 17 5 69 -11 -18 46 44 -18 58 35 .. .. .. -19 41 14 - 49 0 0 -18 36 31 22 46 16 6 69 -12 -18 30 37 -18 42 26 .. .. .. -19 24 56 - 48 0 0 -18 21 3 22 46 15 7 69 -13 -18 15 10 -18 26 56 -17 33 28 -19 9 18 - 47 0 0 -18 6 14 22 46 13 8 68 -14 -18 0 23 -18 12 7 -17 18 49 -18 54 20 - 46 0 0 -17 52 5 22 46 12 9 68 -15 -17 46 15 -17 57 57 -17 4 48 -18 40 2 - 45 0 0 -17 38 36 22 46 10 10 68 -16 -17 32 47 -17 44 26 -16 51 27 -18 26 24 - 44 0 0 -17 25 47 22 46 8 10 67 -17 -17 19 58 -17 31 36 -16 38 45 -18 13 27 - 43 0 0 -17 13 37 22 46 5 11 67 -18 -17 7 49 -17 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Data for the target star ------------------------ * name: TYC 1406-01078-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 09 25 51.9363 DE: +17 51 57.679 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .022 ) * V mag [mag]: 9.6 * B mag [mag]: 10.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3019) Kulin approx. diameter [km]: 15 approx. diameter ["]: .011 distance from Earth [AU]: 1.82400 * orbital information: orbit source: Preston date of fit: 2008 Jan 17 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1132 number of rejected observations: 18 time covered by the observations: 1940 Jan 07 - 2008 Jan 15 1 sigma uncertainty ellipse (major, minor, PA): 0.049, 0.032, 106° remarks: * orbital elements for (3019) Kulin : Mean anomaly = 65.35815461 deg Arg. of pericenter = 320.66499206 deg Long. of node = 104.30452813 deg Inclination = 3.21906422 deg Eccentricity = 0.05464737 Semimajor axis = 2.86325083 AU Perihelion dist = 2.70678170 AU Mag: H = 11.81, G = 0.15 Epoch of elements : MJD 54497.94500000 TDT (2008 Feb 01.945) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 01 3019 Kulin 22h 40.1m UT 9.6 9 25 51.936 17 51 57.68TYC 1406-01078-1 10.9 15.5 15 1.2 1.824 -2.148 12.81 29.937 17.862 203.38 -17.07 22.6676 -.26718 -.63976 -6.35856 2.65678 -0.00068 -0.00006 2000 63.74190372008 125.00000320.664992104.304528 3.2190640.054647372.863250832.7067817011.75 0.15 RATE 2.0342999 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.057 0.039 102.0 4.570 0.040 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 17, 18:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org