IOTA/IOTA-ES occultation update for (294) Felicia / TYC 6352-01019-1 event on 2007 Oct 01, 19:04 UT Visible from Africa, India Summary ------- On 2007 Oct 01 UT, the 53 km diameter asteroid (294) Felicia will occult a 11.0 mag star in the constellation Capricornus for observers along a path across Africa, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.8 mag to 13.7 mag (the magnitude of the asteroid) for at most 10.4 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 78 * date and approx. time of event: 2007 Oct 01, 18:45 - 2007 Oct 01, 19:23 UT * magnitude of target star: 11.0 * magnitude drop [mag]: 2.8 * estimated maximum duration [s]: 10.4 * Moon: 68 % sunlit, 127° distance * Sun: 122° distance * rough path description: Africa, India The occultation path -------------------- * approximate projected width [km]: 59 * 1 sigma uncertainty interval [path widths]: +/- 0.70 * 1 sigma uncertainty interval [seconds]: +/- 7.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .030", 88° ) * approx speed of asteroid's shadow [km/s]: 5.0816 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6352-01019-1 by 294 Felicia on 2007 Oct 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 - 58 0 0 25 31 18 18 45 50 0 112 37 25 14 24 25 48 15 .. .. .. 26 12 3 - 57 0 0 25 9 6 18 45 50 1 113 36 24 52 12 25 26 3 .. .. .. 25 49 50 - 56 0 0 24 46 50 18 45 51 2 113 36 24 29 56 25 3 47 .. .. .. 25 27 34 - 55 0 0 24 24 31 18 45 52 3 114 35 24 7 36 24 41 27 23 44 0 25 5 15 - 54 0 0 24 2 9 18 45 53 4 114 34 23 45 14 24 19 5 23 21 39 24 42 52 - 53 0 0 23 39 44 18 45 55 5 114 34 23 22 50 23 56 41 22 59 15 24 20 28 - 52 0 0 23 17 18 18 45 58 6 115 33 23 0 24 23 34 14 22 36 49 23 58 1 - 51 0 0 22 54 51 18 46 1 7 115 32 22 37 57 23 11 47 22 14 22 23 35 33 - 50 0 0 22 32 23 18 46 4 8 116 31 22 15 30 22 49 19 21 51 55 23 13 4 - 49 0 0 22 9 55 18 46 8 9 116 31 21 53 2 22 26 50 21 29 28 22 50 36 - 48 0 0 21 47 28 18 46 12 10 116 30 21 30 35 22 4 23 21 7 2 22 28 7 - 47 0 0 21 25 2 18 46 16 11 117 29 21 8 9 21 41 56 20 44 36 22 5 40 - 46 0 0 21 2 37 18 46 21 12 117 28 20 45 45 21 19 31 20 22 13 21 43 15 - 45 0 0 20 40 15 18 46 27 13 118 27 20 23 24 20 57 8 19 59 52 21 20 51 - 44 0 0 20 17 55 18 46 33 14 118 26 20 1 5 20 34 48 19 37 34 20 58 30 - 43 0 0 19 55 40 18 46 39 15 118 26 19 38 50 20 12 32 19 15 19 20 36 13 - 42 0 0 19 33 28 18 46 46 16 119 25 19 16 38 19 50 20 18 53 9 20 14 0 - 41 0 0 19 11 21 18 46 54 17 119 24 18 54 32 19 28 12 18 31 4 19 51 51 - 40 0 0 18 49 19 18 47 1 18 119 23 18 32 31 19 6 10 18 9 4 19 29 48 - 39 0 0 18 27 23 18 47 10 20 120 22 18 10 36 18 44 13 17 47 10 19 7 51 - 38 0 0 18 5 34 18 47 18 21 120 21 17 48 48 18 22 23 17 25 23 18 46 0 - 37 0 0 17 43 53 18 47 27 22 121 20 17 27 7 18 0 41 17 3 43 18 24 16 - 36 0 0 17 22 19 18 47 37 23 121 19 17 5 34 17 39 6 16 42 11 18 2 40 - 35 0 0 17 0 53 18 47 47 24 121 19 16 44 9 17 17 39 16 20 47 17 41 12 - 34 0 0 16 39 37 18 47 58 25 122 18 16 22 54 16 56 22 15 59 33 17 19 54 - 33 0 0 16 18 30 18 48 9 26 122 17 16 1 48 16 35 14 15 38 29 16 58 45 - 32 0 0 15 57 34 18 48 20 27 123 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27 19 38 2 18 41 2 20 1 38 88 0 0 19 42 59 19 23 32 6 246 -63 19 26 12 19 59 48 19 2 46 20 23 25 89 0 0 20 4 48 19 23 34 5 247 -62 19 48 1 20 21 38 19 24 34 20 45 16 90 0 0 20 26 42 19 23 36 4 247 -61 20 9 54 20 43 32 19 46 26 21 7 11 91 0 0 20 48 38 19 23 37 3 247 -60 20 31 50 21 5 29 20 8 21 21 29 9 92 0 0 21 10 37 19 23 38 2 248 -59 20 53 48 21 27 29 .. .. .. 21 51 9 93 0 0 21 32 39 19 23 39 1 248 -58 21 15 49 21 49 31 .. .. .. 22 13 11 94 0 0 .. .. .. .. .. .. .. .. .. 21 37 51 .. .. .. .. .. .. .. .. .. Data for the target star ------------------------ * name: TYC 6352-01019-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 52 38.7369 DE: -19 54 18.756 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .026, .024 ) * V mag [mag]: 11.0 * B mag [mag]: 11.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (294) Felicia approx. diameter [km]: 53 approx. diameter ["]: .043 distance from Earth [AU]: 1.70400 * orbital information: orbit source: Preston date of fit: 2007 Sep 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 879 number of rejected observations: 42 time covered by the observations: 1906 May 23 - 2007 Sep 18 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.018, 84° remarks: * orbital elements for (294) Felicia : Mean anomaly = 6.12409914 deg Arg. of pericenter = 184.59676335 deg Long. of node = 136.06644099 deg Inclination = 6.29317398 deg Eccentricity = 0.24189675 Semimajor axis = 3.14322945 AU Perihelion dist = 2.38289244 AU Mag: H = 10.14, G = 0.15 Epoch of elements : MJD 54374.79500000 TDT (2007 Oct 01.795) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Oct 01 294 Felicia 19h 4.7m UT 11.0 20 52 38.737-19 54 18.76TYC 6352-01019-1 11.9 13.7 53 10.4 1.704 1.050 -0.51 16.845 -19.904 -108.76 -3.26 19.0789 .01444 .42561 2.86642 -0.10111 0.00449 0.00139 2000 5.276035132007 927.00000184.596763136.066441 6.2931740.241896753.143229452.38289244 9.65 0.15 RATE 1.7686421 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.033 0.030 87.6 1.700 0.030 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Sep 25, 22:32 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org