IOTA/IOTA-ES occultation update for (294) Felicia / TYC 0697-01490-1 event on 2008 Nov 03, 00:51 UT Visible from Arabia, Africa, NE Brazil Summary ------- On 2008 Nov 03 UT, the 53 km diameter asteroid (294) Felicia will occult a 9.1 mag star in the constellation Orion for observers along a path across Arabia, Africa, NE Brazil. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.0 mag to 9.5 mag (the combined magnitude of the asteroid and the other component of the double star) for at most 5.4 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: 68 * date and approx. time of event: 2008 Nov 03, 00:41 - 2008 Nov 03, 01:01 UT * magnitude of target star: 9.1 * magnitude drop [mag]: 1.0 * estimated maximum duration [s]: 5.4 * Moon: 22 % sunlit, 155° distance * Sun: 144° distance * rough path description: Arabia, Africa, NE Brazil Additional comments ------------------- 1.1" double m9.1/m9.5 The occultation path -------------------- * approximate projected width [km]: 53 * 1 sigma uncertainty interval [path widths]: +/- 0.88 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .028", 85° ) * approx speed of asteroid's shadow [km/s]: 9.7579 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0697-01490-1 by 294 Felicia on 2008 Nov 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 - 70 0 0 - 6 6 49 1 1 2 1 75 -36 - 5 51 52 - 6 21 46 - 5 25 32 - 6 48 4 - 69 0 0 - 5 50 50 1 1 2 2 75 -37 - 5 35 52 - 6 5 47 - 5 9 30 - 6 32 6 - 68 0 0 - 5 34 36 1 1 1 3 75 -38 - 5 19 37 - 5 49 34 - 4 53 13 - 6 15 55 - 67 0 0 - 5 18 7 1 1 1 4 75 -39 - 5 3 7 - 5 33 7 - 4 36 43 - 5 59 29 - 66 0 0 - 5 1 25 1 1 0 5 75 -40 - 4 46 24 - 5 16 25 - 4 19 58 - 5 42 49 - 65 0 0 - 4 44 30 1 0 59 6 75 -41 - 4 29 28 - 4 59 31 - 4 3 0 - 5 25 56 - 64 0 0 - 4 27 21 1 0 57 7 75 -42 - 4 12 18 - 4 42 23 - 3 45 49 - 5 8 49 - 63 0 0 - 4 9 59 1 0 56 8 75 -43 - 3 54 56 - 4 25 2 - 3 28 26 - 4 51 30 - 62 0 0 - 3 52 25 1 0 54 9 75 -44 - 3 37 21 - 4 7 29 - 3 10 49 - 4 33 58 - 61 0 0 - 3 34 39 1 0 52 10 75 -45 - 3 19 34 - 3 49 43 - 2 53 1 - 4 16 14 - 60 0 0 - 3 16 41 1 0 50 11 74 -46 - 3 1 36 - 3 31 46 - 2 35 1 - 3 58 18 - 59 0 0 - 2 58 32 1 0 47 12 74 -47 - 2 43 26 - 3 13 38 - 2 16 50 - 3 40 11 - 58 0 0 - 2 40 12 1 0 45 13 74 -48 - 2 25 5 - 2 55 18 - 1 58 27 - 3 21 53 - 57 0 0 - 2 21 41 1 0 42 14 74 -49 - 2 6 33 - 2 36 48 - 1 39 55 - 3 3 24 - 56 0 0 - 2 3 0 1 0 39 15 74 -50 - 1 47 51 - 2 18 8 - 1 21 11 - 2 44 45 - 55 0 0 - 1 44 9 1 0 36 16 74 -51 - 1 29 0 - 1 59 17 - 1 2 19 - 2 25 56 - 54 0 0 - 1 25 8 1 0 32 17 74 -52 - 1 9 59 - 1 40 18 - 0 43 16 - 2 6 57 - 53 0 0 - 1 5 59 1 0 28 18 74 -53 - 0 50 48 - 1 21 9 - 0 24 5 - 1 47 49 - 52 0 0 - 0 46 40 1 0 25 20 74 -54 - 0 31 29 - 1 1 51 - 0 4 45 - 1 28 33 - 51 0 0 - 0 27 14 1 0 20 21 74 -55 - 0 12 2 - 0 42 25 0 14 43 - 1 9 8 - 50 0 0 - 0 7 40 1 0 16 22 74 -56 0 7 32 - 0 22 51 0 34 19 - 0 49 35 - 49 0 0 0 12 2 1 0 12 23 74 -57 0 27 15 - 0 3 10 0 54 2 - 0 29 55 - 48 0 0 0 31 51 1 0 7 24 74 -58 0 47 4 0 16 38 1 13 52 - 0 10 7 - 47 0 0 0 51 46 1 0 2 25 74 -59 1 7 0 0 36 33 1 33 49 0 9 47 - 46 0 0 1 11 48 0 59 57 26 74 -60 1 27 2 0 56 34 1 53 52 0 29 47 - 45 0 0 1 31 55 0 59 52 27 74 -61 1 47 10 1 16 41 2 14 0 0 49 53 - 44 0 0 1 52 8 0 59 46 28 75 -62 2 7 23 1 36 53 2 34 14 1 10 4 - 43 0 0 2 12 25 0 59 41 29 75 -63 2 27 40 1 57 10 2 54 33 1 30 21 - 42 0 0 2 32 47 0 59 35 30 75 -64 2 48 3 2 17 32 3 14 56 1 50 42 - 41 0 0 2 53 13 0 59 29 31 75 -65 3 8 29 2 37 57 3 35 22 2 11 7 - 40 0 0 3 13 42 0 59 23 32 75 -66 3 28 59 2 58 26 3 55 53 2 31 35 - 39 0 0 3 34 15 0 59 17 33 75 -67 3 49 32 3 18 59 4 16 26 2 52 7 - 38 0 0 3 54 50 0 59 10 34 75 -68 4 10 7 3 39 34 4 37 2 3 12 42 - 37 0 0 4 15 28 0 59 3 35 75 -69 4 30 45 4 0 11 4 57 40 3 33 19 - 36 0 0 4 36 7 0 58 57 36 75 -70 4 51 25 4 20 51 5 18 20 3 53 58 - 35 0 0 4 56 48 0 58 50 37 76 -71 5 12 6 4 41 31 5 39 1 4 14 38 - 34 0 0 5 17 30 0 58 42 38 76 -72 5 32 47 5 2 13 5 59 43 4 35 20 - 33 0 0 5 38 12 0 58 35 39 76 -73 5 53 30 5 22 55 6 20 26 4 56 2 - 32 0 0 5 58 55 0 58 28 40 76 -74 6 14 12 5 43 37 6 41 9 5 16 44 - 31 0 0 6 19 37 0 58 20 41 76 -75 6 34 54 6 4 19 7 1 51 5 37 26 - 30 0 0 6 40 18 0 58 12 42 76 -76 6 55 36 6 25 1 7 22 32 5 58 7 - 29 0 0 7 0 58 0 58 4 43 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0 42 8 41 267 -9 26 19 56 25 51 1 26 45 25 25 25 34 74 0 0 26 2 54 0 42 1 40 267 -8 26 17 22 25 48 26 26 42 51 25 22 59 75 0 0 26 0 1 0 41 55 40 268 -7 26 14 30 25 45 33 26 40 0 25 20 6 76 0 0 25 56 51 0 41 49 39 268 -6 26 11 20 25 42 23 26 36 50 25 16 55 77 0 0 25 53 22 0 41 42 38 269 -5 26 7 51 25 38 54 26 33 22 25 13 26 78 0 0 25 49 36 0 41 36 37 269 -4 26 4 5 25 35 7 26 29 36 25 9 38 79 0 0 25 45 31 0 41 30 36 270 -3 26 0 1 25 31 2 26 25 33 25 5 33 80 0 0 25 41 8 0 41 24 35 270 -3 25 55 38 25 26 39 26 21 11 25 1 9 81 0 0 25 36 27 0 41 18 34 271 -2 25 50 58 25 21 57 26 16 31 24 56 27 82 0 0 25 31 28 0 41 13 33 271 -1 25 45 59 25 16 58 26 11 33 24 51 27 Uncertainty in time = +/- 5 secs [Prediction of 2008 Oct 30.0] Data for the target star ------------------------ * name: TYC 0697-01490-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 00 57.8918 DE: +14 30 17.322 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .024 ) * V mag [mag]: 9.1 * B mag [mag]: 9.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (294) Felicia approx. diameter [km]: 53 approx. diameter ["]: .032 distance from Earth [AU]: 2.28900 * orbital information: orbit source: Preston date of fit: 2008 Oct 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1031 number of rejected observations: 43 time covered by the observations: 1906 May 23 - 2008 Oct 29 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.014, 81° remarks: * orbital elements for (294) Felicia : Mean anomaly = 76.48522092 deg Arg. of pericenter = 184.67536698 deg Long. of node = 136.06184650 deg Inclination = 6.29315154 deg Eccentricity = 0.24192948 Semimajor axis = 3.14407683 AU Perihelion dist = 2.38343196 AU Mag: H = 10.15, G = 0.15 Epoch of elements : MJD 54773.03600000 TDT (2008 Nov 03.036) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 3 294 Felicia 0h 50.2m UT 9.1 5 0 57.892 14 30 17.32TYC 0697-01490-1 9.4 14.6 53 5.4 2.289 -1.420 -4.81 20.0276 14.506 163.34 -15.12 0.8369 -0.02579 0.11223 -5.36355 -1.25158 -0.00342 0.00035 2000 75.94847820081031.00000184.675367136.061847 6.2931520.24192948 3.1440768 2.3834320 9.6 5.00.15 RATE 1.7679270 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.028 85 1.88 0.028 0 54769.5020081103_1490-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 13:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org