IOTA/IOTA-ES occultation update for (6249) Jennifer / TYC 5963-00761-1 event on 2008 Dec 01, 08:23 UT Visible from Canada, Central America, Caribbean Summary ------- On 2008 Dec 01 UT, the 11 km diameter asteroid (6249) Jennifer will occult a 10.4 mag star in the constellation Canis Major for observers along a path across Canada, Central America, Caribbean. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.6 mag to 15.0 mag (the magnitude of the asteroid) for at most 0.8 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: 10 * date and approx. time of event: 2008 Dec 01, 08:15 - 2008 Dec 01, 08:30 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 4.6 * estimated maximum duration [s]: 0.8 * Moon: 11 % sunlit, 141° distance * Sun: 127° distance * rough path description: Canada, Central America, Caribbean The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 6.86 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .099 +/- .067) * 1 sigma uncertainty ellipse (major, minor, PA): ( .099", .067", 96° ) * approx speed of asteroid's shadow [km/s]: 13.6776 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5963-00761-1 by 6249 Jennifer on 2008 Dec 1 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 - 39 52 54 65 0 0 8 15 38 1 226 -21 - 40 3 6 - 39 42 40 - 42 20 29 - 37 19 27 - 42 14 30 64 0 0 8 15 39 3 224 -22 - 42 23 59 - 42 4 58 - 44 32 14 - 39 52 5 Latitude Latitude Latitude Latitude - 44 0 0 63 10 58 8 15 39 4 223 -23 63 15 19 63 6 36 64 15 15 62 6 51 - 45 0 0 62 41 17 8 15 40 4 222 -23 62 45 42 62 36 51 63 46 34 61 36 10 - 46 0 0 62 10 12 8 15 40 5 221 -24 62 14 42 62 5 42 63 16 33 61 4 3 - 47 0 0 61 37 40 8 15 41 6 220 -24 61 42 15 61 33 6 62 45 6 60 30 27 - 48 0 0 61 3 36 8 15 41 7 219 -24 61 8 15 60 58 57 62 12 10 59 55 16 - 49 0 0 60 27 55 8 15 42 7 218 -25 60 32 39 60 23 12 61 37 39 59 18 26 - 50 0 0 59 50 32 8 15 43 8 217 -25 59 55 20 59 45 43 61 1 28 58 39 51 - 51 0 0 59 11 21 8 15 44 9 217 -26 59 16 14 59 6 27 60 23 31 57 59 26 - 52 0 0 58 30 16 8 15 45 10 216 -26 58 35 15 58 25 17 59 43 44 57 17 5 - 53 0 0 57 47 12 8 15 46 11 215 -27 57 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8 29 19 39 58 -14 -54 31 0 -54 38 22 -53 40 24 -55 28 53 -136 0 0 -54 59 39 8 29 22 38 59 -13 -54 56 0 -55 3 18 -54 5 57 -55 53 16 -137 0 0 -55 23 36 8 29 26 38 59 -13 -55 19 59 -55 27 12 -54 30 27 -56 16 40 -138 0 0 -55 46 34 8 29 29 37 60 -12 -55 43 0 -55 50 8 -54 53 57 -56 39 6 -139 0 0 -56 8 35 8 29 33 36 61 -12 -56 5 3 -56 12 7 -55 16 30 -57 0 36 -140 0 0 -56 29 41 8 29 36 36 62 -11 -56 26 11 -56 33 11 -55 38 6 -57 21 13 -141 0 0 -56 49 55 8 29 39 35 62 -11 -56 46 26 -56 53 23 -55 58 48 -57 40 57 -142 0 0 -57 9 17 8 29 42 35 63 -10 -57 5 50 -57 12 43 -56 18 37 -57 59 52 -143 0 0 -57 27 49 8 29 44 34 64 -10 -57 24 25 -57 31 14 -56 37 36 -58 17 58 -144 0 0 -57 45 34 8 29 47 33 65 -10 -57 42 11 -57 48 57 -56 55 46 -58 35 18 -145 0 0 -58 2 32 8 29 50 33 66 -9 -57 59 11 -58 5 53 -57 13 9 -58 51 51 -146 0 0 -58 18 45 8 29 52 32 66 -9 -58 15 26 -58 22 5 -57 29 45 -59 7 42 -147 0 0 -58 34 15 8 29 55 32 67 -8 -58 30 57 -58 37 33 -57 45 37 -59 22 49 -148 0 0 -58 49 2 8 29 57 31 68 -8 -58 45 46 -58 52 19 -58 0 46 -59 37 15 -149 0 0 -59 3 8 8 30 0 30 69 -8 -58 59 53 -59 6 24 -58 15 12 -59 51 1 -150 0 0 -59 16 35 8 30 2 30 70 -7 -59 13 21 -59 19 49 -58 28 58 -60 4 8 -151 0 0 -59 29 22 8 30 4 29 71 -7 -59 26 9 -59 32 35 -58 42 4 -60 16 36 -152 0 0 -59 41 31 8 30 6 29 71 -7 -59 38 20 -59 44 43 -58 54 31 -60 28 28 -153 0 0 -59 53 4 8 30 8 28 72 -6 -59 49 54 -59 56 14 -59 6 20 -60 39 44 -154 0 0 -60 4 1 8 30 11 28 73 -6 -60 0 51 -60 7 10 -59 17 33 -60 50 25 -155 0 0 -60 14 22 8 30 13 27 74 -6 -60 11 14 -60 17 30 -59 28 9 -61 0 31 -156 0 0 -60 24 9 8 30 14 27 75 -5 -60 21 2 -60 27 16 -59 38 11 -61 10 4 -157 0 0 -60 33 23 8 30 16 26 76 -5 -60 30 16 -60 36 29 -59 47 38 -61 19 4 -158 0 0 -60 42 3 8 30 18 26 77 -5 -60 38 58 -60 45 9 -59 56 31 -61 27 32 -159 0 0 -60 50 11 8 30 20 25 77 -4 -60 47 7 -60 53 16 -60 4 51 -61 35 28 -160 0 0 -60 57 48 8 30 22 25 78 -4 -60 54 44 -61 0 52 -60 12 39 -61 42 54 -161 0 0 -61 4 54 8 30 23 24 79 -4 -61 1 50 -61 7 57 -60 19 55 -61 49 49 -162 0 0 -61 11 29 8 30 25 24 80 -3 -61 8 26 -61 14 31 -60 26 40 -61 56 14 -163 0 0 -61 17 34 8 30 27 23 81 -3 -61 14 32 -61 20 36 -60 32 53 -62 2 10 -164 0 0 -61 23 9 8 30 28 23 82 -3 -61 20 7 -61 26 10 -60 38 37 -62 7 37 -165 0 0 -61 28 15 8 30 30 22 83 -2 -61 25 14 -61 31 16 -60 43 50 -62 12 36 -166 0 0 -61 32 52 8 30 31 22 83 -2 -61 29 52 -61 35 52 -60 48 34 -62 17 6 -167 0 0 -61 37 1 8 30 33 21 84 -2 -61 34 1 -61 40 1 -60 52 49 -62 21 9 -168 0 0 -61 40 41 8 30 34 21 85 -1 -61 37 41 -61 43 41 -60 56 35 -62 24 44 -169 0 0 -61 43 53 8 30 35 20 86 -1 -61 40 54 -61 46 53 -60 59 52 -62 27 52 -170 0 0 -61 46 38 8 30 37 20 87 -1 -61 43 39 -61 49 37 -61 2 40 -62 30 32 -171 0 0 -61 48 55 8 30 38 19 88 0 -61 45 56 -61 51 54 -61 5 1 -62 32 46 -172 0 0 -61 50 44 8 30 39 19 89 0 -61 47 46 -61 53 43 -61 6 53 -62 34 33 Uncertainty in time = +/- 6 secs [Prediction of 2008 Nov 26.0] Data for the target star ------------------------ * name: TYC 5963-00761-1 * constellation : Canis Major * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 02 39.8280 DE: -15 55 23.258 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 10.4 * B mag [mag]: 11.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6249) Jennifer approx. diameter [km]: 11 approx. diameter ["]: .014 distance from Earth [AU]: 1.05000 * orbital information: orbit source: Preston date of fit: 2008 Nov 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 519 number of rejected observations: 9 time covered by the observations: 1954 Apr 09 - 2008 Oct 24 1 sigma uncertainty ellipse (major, minor, PA): 0.097, 0.064, 96° remarks: * orbital elements for (6249) Jennifer : Mean anomaly = 62.40305128 deg Arg. of pericenter = 151.42176513 deg Long. of node = 221.74590425 deg Inclination = 28.09973847 deg Eccentricity = 0.14189580 Semimajor axis = 1.91465309 AU Perihelion dist = 1.64297186 AU Mag: H = 12.75, G = 0.15 Epoch of elements : MJD 54801.35000000 TDT (2008 Dec 01.350) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Dec 1 6249 Jennifer 8h 23.4m UT 10.4 7 2 39.828-15 55 23.26TYC 5963-00761-1 11.5 15.0 11 0.8 1.050 -1.822 -59.09 -90.7420 -15.907 51.45 -21.88 8.3893 -0.08415 0.03700 -3.13389 -7.05529 -0.00297 0.00293 2000 61.90082120081130.00000151.421765221.745904 28.0997380.14189580 1.9146531 1.642971912.4 5.00.15 RATE 3.7202230 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.099 0.067 96 7.86 0.099 0 54796.5020081201_0761-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 26, 23:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org