IOTA/IOTA-ES occultation update for (40) Harmonia / TYC 1384-00173-1 event on 2008 Nov 08, 04:54 UT Visible from W Africa, Venezuela, Colombia Summary ------- On 2008 Nov 08 UT, the 108 km diameter asteroid (40) Harmonia will occult a 9.7 mag star in the constellation Cancer for observers along a path across W Africa, Venezuela, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.7 mag to 11.1 mag (the magnitude of the asteroid) for at most 13.4 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: 99 * date and approx. time of event: 2008 Nov 08, 04:41 - 2008 Nov 08, 04:58 UT * magnitude of target star: 9.7 * magnitude drop [mag]: 1.7 * estimated maximum duration [s]: 13.4 * Moon: 71 % sunlit, 138° distance * Sun: 108° distance * rough path description: W Africa, Venezuela, Colombia The occultation path -------------------- * approximate projected width [km]: 108 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .019 +/- .016) * 1 sigma uncertainty ellipse (major, minor, PA): ( .019", .016", 92° ) * approx speed of asteroid's shadow [km/s]: 8.0519 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1384-00173-1 by 40 Harmonia on 2008 Nov 8 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 - 88 0 0 3 2 59 4 41 35 1 70 -71 2 31 40 3 34 18 2 19 47 3 46 12 - 87 0 0 3 25 29 4 41 36 2 70 -72 2 54 11 3 56 48 2 42 17 4 8 43 - 86 0 0 3 47 58 4 41 36 3 70 -73 3 16 40 4 19 18 3 4 47 4 31 12 - 85 0 0 4 10 26 4 41 37 4 70 -74 3 39 8 4 41 45 3 27 15 4 53 39 - 84 0 0 4 32 52 4 41 39 5 70 -75 4 1 34 5 4 11 3 49 41 5 16 5 - 83 0 0 4 55 15 4 41 40 6 70 -76 4 23 58 5 26 33 4 12 5 5 38 27 - 82 0 0 5 17 35 4 41 42 7 70 -76 4 46 18 5 48 53 4 34 25 6 0 47 - 81 0 0 5 39 51 4 41 44 8 70 -77 5 8 35 6 11 9 4 56 42 6 23 2 - 80 0 0 6 2 4 4 41 46 9 70 -78 5 30 48 6 33 20 5 18 55 6 45 13 - 79 0 0 6 24 11 4 41 49 10 70 -79 5 52 56 6 55 27 5 41 4 7 7 20 - 78 0 0 6 46 13 4 41 51 12 70 -79 6 14 59 7 17 28 6 3 7 7 29 21 - 77 0 0 7 8 9 4 41 55 13 71 -80 6 36 56 7 39 24 6 25 4 7 51 16 - 76 0 0 7 29 59 4 41 58 14 71 -81 6 58 47 8 1 13 6 46 56 8 13 5 - 75 0 0 7 51 43 4 42 2 15 71 -81 7 20 31 8 22 55 7 8 40 8 34 46 - 74 0 0 8 13 18 4 42 5 16 71 -81 7 42 8 8 44 29 7 30 18 8 56 21 - 73 0 0 8 34 46 4 42 10 17 71 -82 8 3 37 9 5 56 7 51 47 9 17 47 - 72 0 0 8 56 6 4 42 14 18 71 -82 8 24 58 9 27 14 8 13 9 9 39 5 - 71 0 0 9 17 17 4 42 19 19 71 -82 8 46 10 9 48 24 8 34 21 10 0 14 - 70 0 0 9 38 18 4 42 24 20 72 -82 9 7 13 10 9 24 8 55 24 10 21 13 - 69 0 0 9 59 9 4 42 29 21 72 -81 9 28 6 10 30 14 9 16 18 10 42 2 - 68 0 0 10 19 50 4 42 34 22 72 -81 9 48 48 10 50 53 9 37 1 11 2 41 - 67 0 0 10 40 21 4 42 40 23 72 -80 10 9 20 11 11 22 9 57 34 11 23 9 - 66 0 0 11 0 40 4 42 46 24 72 -80 10 29 41 11 31 39 10 17 55 11 43 26 - 65 0 0 11 20 47 4 42 52 25 73 -79 10 49 50 11 51 44 10 38 5 12 3 31 - 64 0 0 11 40 42 4 42 58 26 73 -78 11 9 47 12 11 38 10 58 2 12 23 23 - 63 0 0 12 0 24 4 43 5 28 73 -78 11 29 31 12 31 18 11 17 47 12 43 3 - 62 0 0 12 19 54 4 43 12 29 73 -77 11 49 2 12 50 46 11 37 19 13 2 30 - 61 0 0 12 39 9 4 43 19 30 73 -76 12 8 20 13 9 59 11 56 37 13 21 43 - 60 0 0 12 58 11 4 43 26 31 74 -75 12 27 24 13 28 59 12 15 42 13 40 42 - 59 0 0 13 16 59 4 43 34 32 74 -74 12 46 14 13 47 45 12 34 33 13 59 27 - 58 0 0 13 35 32 4 43 42 33 74 -73 13 4 49 14 6 16 12 53 8 14 17 57 - 57 0 0 13 53 50 4 43 50 34 74 -72 13 23 9 14 24 31 13 11 29 14 36 12 - 56 0 0 14 11 52 4 43 58 35 75 -71 13 41 13 14 42 32 13 29 35 14 54 11 - 55 0 0 14 29 39 4 44 6 36 75 -71 13 59 2 15 0 16 13 47 24 15 11 55 - 54 0 0 14 47 9 4 44 15 37 75 -70 14 16 35 15 17 44 14 4 58 15 29 22 - 53 0 0 15 4 23 4 44 24 38 76 -69 14 33 51 15 34 56 14 22 15 15 46 33 - 52 0 0 15 21 20 4 44 33 39 76 -68 14 50 50 15 51 51 14 39 15 16 3 27 - 51 0 0 15 38 0 4 44 42 40 76 -67 15 7 33 16 8 29 14 55 58 16 20 4 - 50 0 0 15 54 23 4 44 51 41 76 -66 15 23 57 16 24 49 15 12 24 16 36 23 - 49 0 0 16 10 28 4 45 1 42 77 -65 15 40 5 16 40 52 15 28 32 16 52 25 - 48 0 0 16 26 15 4 45 10 43 77 -64 15 55 54 16 56 36 15 44 22 17 8 8 - 47 0 0 16 41 43 4 45 20 44 77 -63 16 11 25 17 12 2 15 59 54 17 23 34 - 46 0 0 16 56 53 4 45 30 45 78 -62 16 26 37 17 27 10 16 15 7 17 38 40 - 45 0 0 17 11 44 4 45 40 46 78 -61 16 41 30 17 41 59 16 30 1 17 53 28 - 44 0 0 17 26 16 4 45 51 47 78 -60 16 56 5 17 56 29 16 44 36 18 7 57 - 43 0 0 17 40 29 4 46 1 48 79 -59 17 10 20 18 10 39 16 58 52 18 22 7 - 42 0 0 17 54 23 4 46 12 49 79 -58 17 24 16 18 24 30 17 12 49 18 35 57 - 41 0 0 18 7 56 4 46 23 50 79 -57 17 37 51 18 38 2 17 26 26 18 49 28 - 40 0 0 18 21 10 4 46 33 51 80 -56 17 51 7 18 51 13 17 39 43 19 2 38 - 39 0 0 18 34 4 4 46 45 52 80 -55 18 4 3 19 4 4 17 52 39 19 15 29 - 38 0 0 18 46 37 4 46 56 53 81 -54 18 16 39 19 16 36 18 5 16 19 27 59 - 37 0 0 18 58 50 4 47 7 54 81 -53 18 28 54 19 28 46 18 17 31 19 40 9 - 36 0 0 19 10 42 4 47 18 55 81 -52 18 40 48 19 40 36 18 29 27 19 51 58 - 35 0 0 19 22 13 4 47 30 56 82 -51 18 52 22 19 52 6 18 41 1 20 3 27 - 34 0 0 19 33 24 4 47 42 57 82 -50 19 3 34 20 3 14 18 52 14 20 14 34 - 33 0 0 19 44 13 4 47 53 58 83 -49 19 14 26 20 14 1 19 3 6 20 25 21 - 32 0 0 19 54 41 4 48 5 59 83 -48 19 24 56 20 24 28 19 13 37 20 35 46 - 31 0 0 20 4 48 4 48 17 60 84 -47 19 35 4 20 34 32 19 23 47 20 45 51 - 30 0 0 20 14 34 4 48 29 61 84 -46 19 44 52 20 44 16 19 33 35 20 55 33 - 29 0 0 20 23 57 4 48 42 62 84 -45 19 54 17 20 53 38 19 43 1 21 4 55 - 28 0 0 20 32 59 4 48 54 63 85 -44 20 3 21 21 2 38 19 52 5 21 13 54 - 27 0 0 20 41 40 4 49 6 64 85 -43 20 12 3 21 11 17 20 0 48 21 22 32 - 26 0 0 20 49 58 4 49 19 65 86 -42 20 20 23 21 19 33 20 9 9 21 30 48 - 25 0 0 20 57 54 4 49 31 66 86 -41 20 28 21 21 27 28 20 17 7 21 38 42 - 24 0 0 21 5 29 4 49 44 67 87 -40 20 35 57 21 35 1 20 24 44 21 46 15 - 23 0 0 21 12 41 4 49 57 68 88 -39 20 43 11 21 42 12 20 31 58 21 53 25 - 22 0 0 21 19 31 4 50 9 69 88 -38 20 50 2 21 49 0 20 38 50 22 0 13 - 21 0 0 21 25 59 4 50 22 70 89 -37 20 56 31 21 55 27 20 45 20 22 6 39 - 20 0 0 21 32 4 4 50 35 71 89 -36 21 2 38 22 1 31 20 51 27 22 12 42 - 19 0 0 21 37 47 4 50 48 72 90 -35 21 8 22 22 7 13 20 57 12 22 18 24 - 18 0 0 21 43 8 4 51 1 73 91 -35 21 13 44 22 12 32 21 2 34 22 23 43 - 17 0 0 21 48 6 4 51 14 74 91 -34 21 18 43 22 17 29 21 7 33 22 28 39 - 16 0 0 21 52 42 4 51 27 75 92 -33 21 23 20 22 22 4 21 12 10 22 33 14 - 15 0 0 21 56 54 4 51 40 76 93 -32 21 27 34 22 26 16 21 16 24 22 37 25 - 14 0 0 22 0 45 4 51 53 77 94 -31 21 31 25 22 30 5 21 20 16 22 41 14 - 13 0 0 22 4 13 4 52 7 78 95 -30 21 34 53 22 33 32 21 23 45 22 44 41 - 12 0 0 22 7 18 4 52 20 79 96 -29 21 37 59 22 36 37 21 26 51 22 47 45 - 11 0 0 22 10 0 4 52 33 80 97 -28 21 40 42 22 39 18 21 29 34 22 50 27 - 10 0 0 22 12 19 4 52 47 81 99 -27 21 43 2 22 41 37 21 31 54 22 52 45 - 9 0 0 22 14 16 4 53 0 82 101 -26 21 44 59 22 43 34 21 33 51 22 54 42 - 8 0 0 22 15 50 4 53 13 83 103 -25 21 46 33 22 45 7 21 35 26 22 56 15 - 7 0 0 22 17 1 4 53 27 84 105 -24 21 47 45 22 46 18 21 36 37 22 57 26 - 6 0 0 22 17 50 4 53 40 85 109 -23 21 48 33 22 47 7 21 37 26 22 58 14 - 5 0 0 22 18 15 4 53 54 85 114 -22 21 48 59 22 47 32 21 37 52 22 58 40 - 4 0 0 22 18 18 4 54 7 86 121 -21 21 49 2 22 47 35 21 37 54 22 58 42 - 3 0 0 22 17 58 4 54 21 87 132 -20 21 48 42 22 47 15 21 37 34 22 58 22 - 2 0 0 22 17 15 4 54 34 87 153 -19 21 47 59 22 46 32 21 36 51 22 57 40 - 1 0 0 22 16 9 4 54 48 88 184 -18 21 46 53 22 45 27 21 35 45 22 56 34 0 0 0 22 14 41 4 55 1 87 213 -17 21 45 24 22 43 58 21 34 16 22 55 6 1 0 0 22 12 50 4 55 15 87 232 -16 21 43 32 22 42 7 21 32 24 22 53 15 2 0 0 22 10 35 4 55 28 86 243 -15 21 41 17 22 39 54 21 30 9 22 51 2 3 0 0 22 7 58 4 55 42 85 250 -14 21 38 40 22 37 17 21 27 32 22 48 26 4 0 0 22 4 59 4 55 56 84 254 -13 21 35 39 22 34 18 21 24 31 22 45 27 5 0 0 22 1 36 4 56 9 84 258 -12 21 32 16 22 30 57 21 21 8 22 42 6 6 0 0 21 57 51 4 56 23 83 260 -11 21 28 30 22 27 12 21 17 21 22 38 21 7 0 0 21 53 43 4 56 36 82 262 -10 21 24 21 22 23 5 21 13 12 22 34 15 8 0 0 21 49 12 4 56 49 81 264 -9 21 19 50 22 18 35 21 8 40 22 29 45 9 0 0 21 44 19 4 57 3 80 265 -8 21 14 56 22 13 43 21 3 45 22 24 54 10 0 0 21 39 3 4 57 16 79 266 -7 21 9 39 22 8 28 20 58 28 22 19 39 11 0 0 21 33 25 4 57 30 78 268 -7 21 3 59 22 2 51 20 52 48 22 14 3 12 0 0 21 27 24 4 57 43 77 269 -6 20 57 57 21 56 52 20 46 45 22 8 3 13 0 0 21 21 1 4 57 56 76 269 -5 20 51 32 21 50 30 20 40 20 22 1 42 14 0 0 21 14 15 4 58 10 75 270 -4 20 44 45 21 43 45 20 33 32 21 54 58 15 0 0 21 7 7 4 58 23 74 271 -3 20 37 35 21 36 38 20 26 22 21 47 52 16 0 0 20 59 36 4 58 36 73 272 -2 20 30 3 21 29 10 20 18 50 21 40 24 17 0 0 20 51 43 4 58 49 72 272 -1 20 22 9 21 21 18 20 10 55 21 32 33 Uncertainty in time = +/- 3 secs [Prediction of 2008 Oct 30.0] Data for the target star ------------------------ * name: TYC 1384-00173-1 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 00 48.6835 DE: +20 27 47.017 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .013 ) * V mag [mag]: 9.7 * B mag [mag]: 9.9 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (40) Harmonia approx. diameter [km]: 108 approx. diameter ["]: .085 distance from Earth [AU]: 1.75100 * orbital information: orbit source: Preston date of fit: 2008 Oct 30 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 3756 number of rejected observations: 288 time covered by the observations: 1914 Mar 30 - 2008 Oct 27 1 sigma uncertainty ellipse (major, minor, PA): 0.011, 0.009, 96° remarks: * orbital elements for (40) Harmonia : Mean anomaly = 84.17961698 deg Arg. of pericenter = 269.71619816 deg Long. of node = 94.28636118 deg Inclination = 4.25658307 deg Eccentricity = 0.04634070 Semimajor axis = 2.26744089 AU Perihelion dist = 2.16236608 AU Mag: H = 6.98, G = 0.15 Epoch of elements : MJD 54778.20500000 TDT (2008 Nov 08.205) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 8 40 Harmonia 4h 54.8m UT 9.7 8 0 48.684 20 27 47.02TYC 1384-00173-1 9.9 11.1 108 13.4 1.751 1.622 -0.48 -1.2495 20.463 102.25 -16.67 4.9131 0.00096 0.02960 4.54373 -0.09568 -0.00522 0.00107 2000 81.81108820081031.00000269.716198 94.286361 4.2565830.04634070 2.2674409 2.1623661 7.0 5.00.15 RATE 2.8866900 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.019 0.016 92 1.19 0.016 0 54769.5020081108_0173-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 30, 14:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org