IOTA/IOTA-ES occultation update for (4735) Gary / HIP 30958 event on 2008 Dec 05, 14:27 UT Visible from Philippines, SE Asia Summary ------- On 2008 Dec 05 UT, the 10 km diameter asteroid (4735) Gary will occult a 9.0 mag star in the constellation Gemini for observers along a path across Philippines, SE Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.4 mag to 15.4 mag (the magnitude of the asteroid) for at most 1.3 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: 9 * date and approx. time of event: 2008 Dec 05, 14:15 - 2008 Dec 05, 14:40 UT * magnitude of target star: 9.0 * magnitude drop [mag]: 6.4 * estimated maximum duration [s]: 1.3 * Moon: 47 % sunlit, 116° distance * Sun: 157° distance * rough path description: Philippines, SE Asia Additional comments ------------------- pm diff The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 7.28 * 1 sigma uncertainty interval [seconds]: +/- 12.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .122 +/- .077) * 1 sigma uncertainty ellipse (major, minor, PA): ( .123", .076", 86° ) * approx speed of asteroid's shadow [km/s]: 7.3378 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 30958 by 4735 Gary on 2008 Dec 5 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 74 0 0 - 2 0 10 14 40 20 0 67 -23 - 1 56 50 - 2 3 29 .. .. .. - 2 52 5 75 0 0 - 1 35 21 14 40 20 1 67 -24 - 1 32 2 - 1 38 39 .. .. .. - 2 27 3 76 0 0 - 1 11 11 14 40 19 3 67 -26 - 1 7 54 - 1 14 29 .. .. .. - 2 2 41 77 0 0 - 0 47 41 14 40 18 4 67 -27 - 0 44 24 - 0 50 58 .. .. .. - 1 38 58 78 0 0 - 0 24 50 14 40 17 5 67 -28 - 0 21 34 - 0 28 7 .. .. .. - 1 15 55 79 0 0 - 0 2 39 14 40 15 6 67 -29 0 0 36 - 0 5 54 0 47 49 - 0 53 32 80 0 0 0 18 53 14 40 13 7 67 -30 0 22 8 0 15 39 1 9 10 - 0 31 48 81 0 0 0 39 46 14 40 11 8 67 -31 0 43 0 0 36 32 1 29 53 - 0 10 44 82 0 0 1 0 0 14 40 8 9 67 -32 1 3 13 0 56 47 1 49 56 0 9 40 83 0 0 1 19 35 14 40 5 10 67 -33 1 22 48 1 16 22 2 9 20 0 29 26 84 0 0 1 38 31 14 40 2 11 67 -34 1 41 43 1 35 19 2 28 6 0 48 32 85 0 0 1 56 48 14 39 59 12 67 -35 1 59 59 1 53 37 2 46 14 1 6 59 86 0 0 2 14 26 14 39 55 13 67 -36 2 17 37 2 11 16 3 3 43 1 24 47 87 0 0 2 31 26 14 39 51 14 67 -37 2 34 36 2 28 16 3 20 34 1 41 56 88 0 0 2 47 48 14 39 47 15 67 -38 2 50 57 2 44 38 3 36 46 1 58 26 89 0 0 3 3 31 14 39 42 16 67 -39 3 6 40 3 0 22 3 52 21 2 14 18 90 0 0 3 18 36 14 39 37 17 67 -40 3 21 44 3 15 27 4 7 18 2 29 31 91 0 0 3 33 3 14 39 32 18 67 -41 3 36 11 3 29 55 4 21 37 2 44 6 92 0 0 3 46 52 14 39 27 19 67 -42 3 49 59 3 43 44 4 35 19 2 58 3 93 0 0 4 0 3 14 39 21 20 67 -43 4 3 10 3 56 56 4 48 23 3 11 22 94 0 0 4 12 37 14 39 15 21 67 -44 4 15 44 4 9 31 5 0 50 3 24 3 95 0 0 4 24 34 14 39 9 22 67 -45 4 27 40 4 21 28 5 12 40 3 36 6 96 0 0 4 35 53 14 39 3 23 67 -46 4 38 59 4 32 47 5 23 54 3 47 32 97 0 0 4 46 36 14 38 56 24 67 -47 4 49 41 4 43 30 5 34 30 3 58 20 98 0 0 4 56 41 14 38 49 25 67 -48 4 59 46 4 53 36 5 44 30 4 8 31 99 0 0 5 6 10 14 38 42 26 67 -48 5 9 14 5 3 5 5 53 53 4 18 5 100 0 0 5 15 1 14 38 35 27 67 -49 5 18 6 5 11 57 6 2 40 4 27 2 101 0 0 5 23 17 14 38 27 28 67 -50 5 26 21 5 20 13 6 10 51 4 35 23 102 0 0 5 30 56 14 38 20 29 67 -51 5 34 0 5 27 52 6 18 26 4 43 6 103 0 0 5 37 59 14 38 12 29 67 -52 5 41 3 5 34 56 6 25 25 4 50 13 104 0 0 5 44 26 14 38 3 30 67 -53 5 47 29 5 41 23 6 31 48 4 56 44 105 0 0 5 50 17 14 37 55 31 67 -54 5 53 20 5 47 14 6 37 35 5 2 39 106 0 0 5 55 32 14 37 46 32 67 -55 5 58 35 5 52 29 6 42 47 5 7 57 107 0 0 6 0 12 14 37 38 33 67 -56 6 3 14 5 57 9 6 47 24 5 12 39 108 0 0 6 4 15 14 37 29 34 67 -56 6 7 18 6 1 13 6 51 25 5 16 46 109 0 0 6 7 44 14 37 19 35 66 -57 6 10 46 6 4 42 6 54 52 5 20 17 110 0 0 6 10 37 14 37 10 36 66 -58 6 13 39 6 7 35 6 57 43 5 23 12 111 0 0 6 12 55 14 37 0 37 66 -59 6 15 57 6 9 53 6 59 59 5 25 31 112 0 0 6 14 38 14 36 51 38 66 -60 6 17 40 6 11 36 7 1 40 5 27 16 113 0 0 6 15 45 14 36 41 39 66 -60 6 18 47 6 12 43 7 2 47 5 28 24 114 0 0 6 16 18 14 36 30 39 66 -61 6 19 20 6 13 16 7 3 19 5 28 58 115 0 0 6 16 16 14 36 20 40 65 -62 6 19 18 6 13 14 7 3 16 5 28 56 116 0 0 6 15 39 14 36 10 41 65 -63 6 18 41 6 12 37 7 2 39 5 28 20 117 0 0 6 14 28 14 35 59 42 65 -63 6 17 29 6 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162 0 0 - 4 25 9 14 25 41 62 9 -56 - 4 21 49 - 4 28 28 - 3 33 41 - 5 17 2 163 0 0 - 4 52 0 14 25 26 62 7 -55 - 4 48 40 - 4 55 20 - 4 0 22 - 5 44 5 164 0 0 - 5 19 22 14 25 10 62 5 -55 - 5 16 2 - 5 22 43 - 4 27 33 - 6 11 38 165 0 0 - 5 47 15 14 24 55 61 3 -54 - 5 43 54 - 5 50 37 - 4 55 14 - 6 39 43 166 0 0 - 6 15 38 14 24 39 61 1 -53 - 6 12 16 - 6 19 0 - 5 23 26 - 7 8 17 167 0 0 - 6 44 31 14 24 24 61 360 -52 - 6 41 8 - 6 47 54 - 5 52 7 - 7 37 21 168 0 0 - 7 13 53 14 24 8 60 358 -51 - 7 10 29 - 7 17 16 - 6 21 17 - 8 6 55 169 0 0 - 7 43 44 14 23 53 59 356 -50 - 7 40 19 - 7 47 8 - 6 50 57 - 8 36 58 170 0 0 - 8 14 3 14 23 37 59 355 -49 - 8 10 38 - 8 17 28 - 7 21 5 - 9 7 30 171 0 0 - 8 44 51 14 23 22 58 353 -48 - 8 41 25 - 8 48 17 - 7 51 41 - 9 38 30 172 0 0 - 9 16 6 14 23 7 58 352 -47 - 9 12 40 - 9 19 33 - 8 22 44 -10 9 57 173 0 0 - 9 47 49 14 22 52 57 350 -46 - 9 44 21 - 9 51 16 - 8 54 14 -10 41 52 174 0 0 -10 19 58 14 22 37 56 349 -45 -10 16 29 -10 23 26 - 9 26 11 -11 14 14 175 0 0 -10 52 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52 14 16 52 31 325 -16 -26 44 5 -26 51 39 -25 49 23 -27 47 0 -158 0 0 -27 26 35 14 16 43 30 324 -15 -27 22 48 -27 30 23 -26 28 0 -28 25 50 -157 0 0 -28 5 16 14 16 34 29 323 -14 -28 1 29 -28 9 4 -27 6 35 -29 4 37 -156 0 0 -28 43 53 14 16 25 28 323 -13 -28 40 5 -28 47 41 -27 45 7 -29 43 19 -155 0 0 -29 22 25 14 16 16 27 322 -12 -29 18 37 -29 26 13 -28 23 34 -30 21 56 -154 0 0 -30 0 50 14 16 8 26 322 -10 -29 57 2 -30 4 39 -29 1 55 -31 0 25 -153 0 0 -30 39 7 14 16 1 25 321 -9 -30 35 19 -30 42 56 -29 40 9 -31 38 46 -152 0 0 -31 17 15 14 15 53 24 320 -8 -31 13 26 -31 21 4 -30 18 13 -32 16 57 -151 0 0 -31 55 12 14 15 46 23 320 -7 -31 51 23 -31 59 1 -30 56 8 -32 54 56 -150 0 0 -32 32 58 14 15 39 22 319 -6 -32 29 9 -32 36 47 -31 33 52 -33 32 44 -149 0 0 -33 10 30 14 15 33 21 318 -5 -33 6 41 -33 14 19 -32 11 23 -34 10 17 -148 0 0 -33 47 48 14 15 27 20 318 -4 -33 43 59 -33 51 37 -32 48 41 -34 47 36 -147 0 0 -34 24 50 14 15 21 19 317 -3 -34 21 1 -34 28 40 -33 25 43 -35 24 38 -146 0 0 -35 1 36 14 15 15 18 317 -2 -34 57 47 -35 5 25 -34 2 30 -36 1 23 -145 0 0 -35 38 4 14 15 10 17 316 -1 -35 34 15 -35 41 53 -34 38 59 -36 37 49 -144 0 0 -36 14 13 14 15 5 16 315 0 -36 10 24 -36 18 2 -35 15 9 -37 13 56 Uncertainty in time = +/- 14 secs [Prediction of 2008 Nov 26.0] Data for the target star ------------------------ * name: HIP 30958 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 29 53.8232 DE: +22 46 44.366 * position source: Pos: HIP2, pm: HIP2, pi:HIP2 * standard error: RA,DE ["]: ( .029, .019 ) * V mag [mag]: 9.0 * B mag [mag]: 9.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4735) Gary approx. diameter [km]: 10 approx. diameter ["]: .012 distance from Earth [AU]: 1.17900 * orbital information: orbit source: Preston date of fit: 2008 Oct 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 603 number of rejected observations: 11 time covered by the observations: 1950 May 10 - 2008 Oct 21 1 sigma uncertainty ellipse (major, minor, PA): 0.119, 0.074, 86° remarks: * orbital elements for (4735) Gary : Mean anomaly = 4.78593567 deg Arg. of pericenter = 351.75029791 deg Long. of node = 88.46790735 deg Inclination = 7.24321403 deg Eccentricity = 0.11889751 Semimajor axis = 2.40552197 AU Perihelion dist = 2.11951139 AU Mag: H = 12.71, G = 0.15 Epoch of elements : MJD 54805.60200000 TDT (2008 Dec 05.602) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Dec 5 4735 Gary 14h 27.4m UT 9.0 6 29 53.823 22 46 44.37HIP 30958 9.2 15.4 10 1.3 1.179 -2.038 12.68 165.8722 22.775 -39.13 -22.46 14.4561 -0.18298 -0.40772 -3.77663 1.70014 -0.00216 0.00015 2000 3.30603320081130.00000351.750298 88.467907 7.2432140.11889751 2.4055220 2.119511412.7 5.00.15 RATE 2.6417400 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.123 0.076 86 8.28 0.085 0 54796.5020081205__30958 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 26, 23:43 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org