IOTA/IOTA-ES occultation update for (278) Paulina / HIP 22743 event on 2009 Nov 09, 08:00 UT Visible from Summary ------- On 2009 Nov 09 UT, the 35 km diameter asteroid (278) Paulina will occult a 6.7 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.3 mag to 14.0 mag (the magnitude of the asteroid) for at most 3.3 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: . The event at a glimpse ---------------------- * Rank: 66 * date and approx. time of event: 2009 Nov 09, 07:52 - 2009 Nov 09, 08:09 UT * magnitude of target star: 6.7 * magnitude drop [mag]: 7.3 * estimated maximum duration [s]: 3.3 * Moon: 53 % sunlit, 58° distance * Sun: 152° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 0.91 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .020) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .020", 81° ) * approx speed of asteroid's shadow [km/s]: 10.7632 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 22743 by 278 Paulina on 2009 Nov 9 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 180 0 0 -14 57 23 8 9 29 1 66 -28 -14 46 2 -15 8 45 -14 25 25 -15 29 29 -179 0 0 -14 31 23 8 9 28 2 65 -29 -14 20 4 -14 42 44 -13 59 29 -15 3 26 -178 0 0 -14 5 37 8 9 28 3 65 -30 -13 54 18 -14 16 57 -13 33 46 -14 37 36 -177 0 0 -13 40 4 8 9 27 4 65 -31 -13 28 46 -13 51 22 -13 8 16 -14 12 0 -176 0 0 -13 14 44 8 9 26 5 65 -33 -13 3 28 -13 26 2 -12 43 0 -13 46 37 -175 0 0 -12 49 40 8 9 25 6 64 -34 -12 38 25 -13 0 56 -12 17 59 -13 21 29 -174 0 0 -12 24 50 8 9 24 7 64 -35 -12 13 36 -12 36 5 -11 53 12 -12 56 35 -173 0 0 -12 0 16 8 9 22 8 64 -36 -11 49 3 -12 11 29 -11 28 42 -12 31 58 -172 0 0 -11 35 58 8 9 20 9 64 -37 -11 24 46 -11 47 10 -11 4 28 -12 7 36 -171 0 0 -11 11 56 8 9 18 10 64 -38 -11 0 47 -11 23 7 -10 40 30 -11 43 31 -170 0 0 -10 48 12 8 9 16 11 63 -39 -10 37 4 -10 59 22 -10 16 49 -11 19 43 -169 0 0 -10 24 46 8 9 14 12 63 -40 -10 13 39 -10 35 54 - 9 53 27 -10 56 13 -168 0 0 -10 1 38 8 9 11 13 63 -41 - 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44 0 0 -13 50 14 7 52 39 29 307 -7 -13 38 59 -14 1 30 -13 18 33 -14 22 3 - 43 0 0 -14 15 21 7 52 33 28 307 -6 -14 4 5 -14 26 38 -13 43 37 -14 47 13 - 42 0 0 -14 40 40 7 52 28 27 306 -5 -14 29 23 -14 51 58 -14 8 53 -15 12 35 - 41 0 0 -15 6 10 7 52 23 26 306 -4 -14 54 52 -15 17 30 -14 34 20 -15 38 9 - 40 0 0 -15 31 52 7 52 18 25 306 -3 -15 20 33 -15 43 13 -14 59 59 -16 3 54 - 39 0 0 -15 57 45 7 52 13 24 305 -2 -15 46 24 -16 9 6 -15 25 49 -16 29 49 - 38 0 0 -16 23 47 7 52 8 23 305 -1 -16 12 25 -16 35 9 -15 51 48 -16 55 54 Uncertainty in time = +/- 4 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 22743 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 53 34.1044 DE: +23 18 56.438 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .019, .015 ) * V mag [mag]: 6.7 * B mag [mag]: 7.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (278) Paulina approx. diameter [km]: 35 approx. diameter ["]: .023 distance from Earth [AU]: 2.08400 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 765 number of rejected observations: 102 time covered by the observations: 1906 Apr 25 - 2007 Jul 12 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.014, 76° remarks: * orbital elements for (278) Paulina : Mean anomaly = 234.66138876 deg Arg. of pericenter = 140.45415483 deg Long. of node = 62.09696249 deg Inclination = 7.82159649 deg Eccentricity = 0.13322410 Semimajor axis = 2.75456155 AU Perihelion dist = 2.38758755 AU Mag: H = 9.31, G = 0.15 Epoch of elements : MJD 55144.33400000 TDT (2009 Nov 09.334) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 9 278 Paulina 8h 0.4m UT 6.7 4 53 34.104 23 18 56.44HIP 22743 7.6 14.0 35 3.3 2.084 -1.851 2.77 -95.3321 23.314 55.87 -16.93 8.0062 -0.04174 -0.38477 -6.03944 0.65691 -0.00277 -0.00038 2000 233.727029200911 5.00000140.454155 62.096962 7.8215960.13322410 2.7545616 2.3875876 9.4 5.00.15 RATE 2.1558840 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.020 81 1.91 0.021 0 54786.5020091109__22743 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 18:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org