IOTA/IOTA-ES occultation update for (3025) Higson / HIP 56019 event on 2008 Jan 05, 23:46 UT Visible from Africa Summary ------- On 2008 Jan 05 UT, the 52 km diameter asteroid (3025) Higson will occult a 7.5 mag star in the constellation Crater for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.9 mag to 17.4 mag (the magnitude of the asteroid) for at most 3.9 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: 22 * date and approx. time of event: 2008 Jan 05, 23:39 - 2008 Jan 05, 23:52 UT * magnitude of target star: 7.5 * magnitude drop [mag]: 9.9 * estimated maximum duration [s]: 3.9 * Moon: 6 % sunlit, 76° distance * Sun: 104° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 3.10 * 1 sigma uncertainty interval [seconds]: +/- 10.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .082 +/- .061) * 1 sigma uncertainty ellipse (major, minor, PA): ( .094", .042", 122° ) * approx speed of asteroid's shadow [km/s]: 13.4139 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 56019 by 3025 Higson on 2008 Jan 05 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. 11 37 31 42 21 3 ... .. .. .. .. .. 10 4 24 40 38 20 23 39 36 9 121 -72 11 10 50 40 20 55 8 50 24 40 58 12 16 32 41 39 2 7 ... .. .. .. .. .. 14 52 3 37 25 49 23 39 46 14 124 -73 15 36 32 37 15 28 14 5 34 37 36 49 19 39 33 36 22 16 8 2 12 39 9 27 17 55 29 34 50 16 23 39 56 17 125 -74 18 31 45 34 42 35 17 18 11 34 58 17 21 58 3 34 1 22 12 56 3 35 58 21 20 12 0 32 32 43 23 40 5 20 126 -74 20 43 43 32 26 32 19 39 37 32 39 9 23 47 53 31 52 33 16 0 34 33 25 14 22 0 35 30 26 39 23 40 15 23 127 -74 22 29 21 30 21 25 21 31 20 30 32 3 25 18 26 29 52 22 18 17 26 31 9 57 23 30 16 28 28 49 23 40 25 25 127 -73 23 56 56 28 24 16 23 3 14 28 33 29 26 34 59 27 58 48 20 6 9 29 5 54 24 46 11 26 37 17 23 40 35 27 128 -73 25 11 17 26 33 15 24 20 48 26 41 25 27 40 51 26 10 32 21 35 54 27 9 52 25 51 35 24 50 48 23 40 44 29 128 -72 26 15 26 24 47 10 25 27 29 24 54 31 28 38 17 24 26 39 22 51 51 25 19 57 26 48 37 23 8 30 23 40 54 31 128 -71 27 11 29 23 5 11 26 25 33 23 11 53 29 28 51 22 46 26 23 57 14 23 34 55 27 38 51 21 29 43 23 41 4 32 128 -70 28 0 53 21 26 40 27 16 37 21 32 50 30 13 43 21 9 23 24 54 14 21 53 56 28 23 24 19 53 58 23 41 13 34 127 -69 28 44 46 19 51 8 28 1 53 19 56 51 30 53 46 19 35 5 25 44 23 20 16 21 29 3 8 18 20 50 23 41 23 35 127 -68 29 23 55 18 18 12 28 42 13 18 23 32 31 29 40 18 3 12 26 28 50 18 41 42 29 38 44 16 50 2 23 41 33 37 127 -67 29 59 2 16 47 34 29 18 19 16 52 33 32 1 59 16 33 28 27 8 25 17 9 35 30 10 44 15 21 17 23 41 42 38 126 -66 30 30 35 15 18 57 29 50 45 15 23 40 32 31 7 15 5 38 27 43 49 15 39 42 30 39 32 13 54 21 23 41 52 39 125 -65 30 59 2 13 52 9 30 19 56 13 56 37 32 57 28 13 39 31 28 15 35 14 11 49 31 5 31 12 29 5 23 42 2 40 125 -64 31 24 41 12 26 59 30 46 14 12 31 14 33 21 17 12 14 58 28 44 6 12 45 41 31 28 56 11 5 18 23 42 12 41 124 -63 31 47 50 11 3 18 31 9 57 11 7 22 33 42 50 10 51 49 29 9 45 11 21 10 31 50 4 9 42 52 23 42 21 43 123 -62 32 8 43 9 40 57 31 31 19 9 44 50 34 2 19 9 29 56 29 32 49 9 58 4 32 9 5 8 21 40 23 42 31 44 123 -61 32 27 31 8 19 49 31 50 33 8 23 34 34 19 55 8 9 13 29 53 31 8 36 17 32 26 10 7 1 35 23 42 41 45 122 -60 32 44 25 6 59 47 32 7 50 7 3 24 34 35 45 6 49 35 30 12 4 7 15 40 32 41 28 5 42 31 23 42 50 45 121 -59 32 59 34 5 40 47 32 23 18 5 44 17 34 49 58 5 30 54 30 28 39 5 56 9 32 55 6 4 24 23 23 43 0 46 120 -58 33 13 3 4 22 42 32 37 4 4 26 6 35 2 41 4 13 8 30 43 23 4 37 36 33 7 11 3 7 7 23 43 10 47 119 -57 33 25 1 3 5 29 32 49 16 3 8 47 35 13 58 2 56 10 30 56 23 3 19 58 33 17 47 1 50 37 23 43 19 48 118 -56 33 35 31 1 49 2 32 59 58 1 52 15 35 23 54 1 39 58 31 7 48 2 3 9 33 27 0 0 34 51 23 43 29 49 116 -55 33 44 39 0 33 18 33 9 16 0 36 27 35 32 34 0 24 27 31 17 40 0 47 6 33 34 53 - 0 40 15 23 43 39 49 115 -54 33 52 28 - 0 41 46 33 17 14 - 0 38 42 35 40 1 - 0 50 26 31 26 6 - 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57 11 32 26 38 -23 18 45 23 46 43 54 87 -37 32 45 23 -23 20 13 32 7 49 -23 17 15 34 40 20 -23 28 34 30 9 39 -23 7 11 32 11 6 -24 28 57 23 46 53 53 85 -36 32 30 3 -24 30 27 31 52 5 -24 27 26 34 26 10 -24 38 56 29 52 43 -24 17 12 31 54 7 -25 39 13 23 47 3 53 84 -35 32 13 16 -25 40 44 31 34 54 -25 37 40 34 10 39 -25 49 24 29 34 13 -25 27 14 31 35 35 -26 49 34 23 47 12 53 83 -34 31 54 58 -26 51 7 31 16 9 -26 47 59 33 53 43 -26 59 58 29 14 2 -26 37 21 31 15 26 -28 0 2 23 47 22 52 81 -33 31 35 4 -28 1 37 30 55 45 -27 58 24 33 35 17 -28 10 40 28 52 6 -27 47 31 30 53 34 -29 10 37 23 47 32 52 80 -32 31 13 27 -29 12 15 30 33 37 -29 8 57 33 15 16 -29 21 31 28 28 18 -28 57 48 30 29 51 -30 21 21 23 47 41 51 79 -32 30 50 1 -30 23 2 30 9 37 -30 19 39 32 53 33 -30 32 34 28 2 31 -30 8 12 30 4 10 -31 32 16 23 47 51 51 78 -31 30 24 39 -31 33 59 29 43 38 -31 30 31 32 30 1 -31 43 48 27 34 36 -31 18 44 29 36 24 -32 43 23 23 48 1 50 77 -30 29 57 11 -32 45 9 29 15 31 -32 41 34 32 4 34 -32 55 17 27 4 23 -32 29 25 29 6 20 -33 54 42 23 48 11 49 76 -29 29 27 29 -33 56 32 28 45 7 -33 52 50 31 37 1 -34 7 1 26 31 43 -33 40 16 28 33 50 -35 6 15 23 48 20 49 75 -28 28 55 22 -35 8 9 28 12 13 -35 4 19 31 7 12 -35 19 1 25 56 23 -34 51 18 27 58 40 -36 18 4 23 48 30 48 74 -27 28 20 36 -36 20 2 27 36 38 -36 16 2 30 34 57 -36 31 19 25 18 10 -36 2 32 27 20 35 -37 30 7 23 48 40 47 73 -26 27 42 59 -37 32 11 26 58 7 -37 28 1 30 0 1 -37 43 57 24 36 47 -37 13 57 26 39 20 -38 42 28 23 48 49 46 72 -25 27 2 13 -38 44 37 26 16 23 -38 40 16 29 22 11 -38 56 54 23 51 57 -38 25 35 25 54 36 -39 55 5 23 48 59 45 72 -24 26 18 0 -39 57 20 25 31 6 -39 52 47 28 41 8 -40 10 13 23 3 19 -39 37 24 25 6 0 -41 8 0 23 49 9 44 71 -23 25 29 58 -41 10 21 24 41 56 -41 5 35 27 56 32 -41 23 53 22 10 29 -40 49 26 24 13 8 -42 21 12 23 49 18 43 71 -23 24 37 43 -42 23 41 23 48 26 -42 18 39 27 8 2 -42 37 56 21 13 0 -42 1 38 23 15 30 -43 34 40 23 49 28 42 71 -22 23 40 46 -43 37 18 22 50 8 -43 31 59 26 15 9 -43 52 22 20 10 20 -43 14 0 22 12 32 -44 48 24 23 49 38 41 71 -21 22 38 32 -44 51 11 21 46 25 -44 45 33 25 17 24 -45 7 11 19 1 50 -44 26 28 21 3 34 -46 2 21 23 49 48 40 71 -20 21 30 23 -46 5 19 20 36 38 -45 59 19 24 14 9 -46 22 21 17 46 48 -45 39 1 19 47 49 -47 16 28 23 49 57 39 71 -19 20 15 32 -47 19 39 19 19 59 -47 13 14 23 4 40 -47 37 52 16 24 20 -46 51 31 18 24 20 -48 30 42 23 50 7 38 71 -18 18 53 2 -48 34 7 17 55 30 -48 27 13 21 48 7 -48 53 40 14 53 25 -48 3 54 16 52 0 -49 44 56 23 50 17 36 72 -17 17 21 48 -49 48 36 16 22 3 -49 41 10 20 23 28 -50 9 42 13 12 47 -49 16 0 15 9 27 -50 59 0 23 50 26 35 72 -16 15 40 28 -51 3 0 14 38 15 -50 54 56 18 49 29 -51 25 53 11 20 56 -50 27 37 13 15 1 -52 12 44 23 50 36 33 73 -15 13 47 26 -52 17 5 12 42 26 -52 8 17 17 4 39 -52 42 3 9 16 2 -51 38 26 11 6 42 -53 25 49 23 50 46 32 74 -14 11 40 40 -53 30 36 10 32 32 -53 20 56 15 7 8 -53 58 0 6 55 47 -52 48 5 8 41 57 -54 37 52 23 50 55 30 76 -13 9 17 41 -54 43 9 8 5 58 -54 32 27 12 54 40 -55 13 28 4 17 19 -53 56 0 5 57 35 -55 48 18 23 51 5 28 78 -12 6 35 23 -55 54 13 5 19 32 -55 42 15 10 24 24 -56 28 0 1 16 57 -55 1 24 2 49 34 -56 56 18 23 51 15 26 80 -11 3 29 46 -57 2 59 2 9 4 -56 49 28 7 32 43 -57 41 3 - 2 10 6 -56 3 7 - 0 47 26 -58 0 40 23 51 25 24 82 -9 - 0 4 22 -58 8 18 - 1 30 52 -57 52 50 4 15 1 -58 51 42 - 6 10 25 -56 59 24 - 5 0 32 -58 59 33 23 51 34 22 86 -8 - 4 13 56 -59 8 26 - 5 47 38 -58 50 24 0 25 16 -59 58 40 - 10 53 24 -57 47 27 - 9 59 52 -59 50 1 23 51 44 20 90 -7 - 9 8 41 -60 0 37 - 10 51 46 -59 39 5 - 4 4 37 -60 59 58 - 16 34 7 -58 22 23 - 16 1 7 -60 26 58 23 51 54 17 95 -6 - 15 3 24 -60 40 7 - 17 0 1 -60 13 20 - 9 25 57 -61 52 21 - 23 41 55 -58 34 1 - 23 33 34 -60 40 4 23 52 3 13 101 -4 - 22 24 37 -60 57 35 - 24 45 0 -60 21 35 - 15 55 51 -62 30 16 - 33 49 6 -57 49 55 - 34 2 26 -59 58 19 23 52 13 8 110 -2 - 32 22 9 -60 27 30 - 35 54 27 -59 24 59 - 24 5 26 -62 42 21 ... .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. - 35 23 28 -61 55 4 ... .. .. .. .. .. Data for the target star ------------------------ * name: HIP 56019 * constellation : Crater * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 11 28 52.2237 DE: -16 35 41.512 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .014, .010 ) * V mag [mag]: 7.5 * B mag [mag]: 9.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3025) Higson approx. diameter [km]: 52 approx. diameter ["]: .025 distance from Earth [AU]: 2.90100 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 411 number of rejected observations: 8 time covered by the observations: 1927 Jan 28 - 2007 Dec 16 1 sigma uncertainty ellipse (major, minor, PA): 0.093, 0.041, 123° remarks: * orbital elements for (3025) Higson : Mean anomaly = 103.72849220 deg Arg. of pericenter = 117.35764812 deg Long. of node = 293.61183459 deg Inclination = 21.01421449 deg Eccentricity = 0.08737888 Semimajor axis = 3.19782444 AU Perihelion dist = 2.91840212 AU Mag: H = 10.28, G = 0.15 Epoch of elements : MJD 54470.99000000 TDT (2008 Jan 05.990) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 05 3025 Higson 23h 45.9m UT 7.5 11 28 52.224-16 35 41.51HIP 56019 9.1 17.4 52 3.9 2.901 0.185 -22.80 70.792 -16.589 184.87 -22.59 23.7652 -.58073 -.06889 0.88168 -7.51967 -0.00514 0.00290 2000 103.5578612008 1 5.00000117.357648293.611835 21.0142140.087378883.197824442.9184021211.65 0.15 RATE 1.7235430 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.094 0.042 122.3 4.100 0.076 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org