IOTA/IOTA-ES occultation update for (776) Berbericia / 2UCAC 39648749 event on 2008 Oct 17, 23:45 UT Visible from UK Summary ------- On 2008 Oct 17 UT, the 151 km diameter asteroid (776) Berbericia will occult a 12.7 mag star in the constellation Gemini for observers along a path across UK. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 12.2 mag (the magnitude of the asteroid) for at most 15.1 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 Oct 17, 23:40 - 2008 Oct 17, 23:49 UT * magnitude of target star: 12.7 * magnitude drop [mag]: 0.5 * estimated maximum duration [s]: 15.1 * Moon: 86 % sunlit, 33° distance * Sun: 105° distance * rough path description: UK The occultation path -------------------- * approximate projected width [km]: 378 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 4.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .022", 82° ) * approx speed of asteroid's shadow [km/s]: 10.0390 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 39648749 by 776 Berbericia on 2008 Oct 17 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 - 23 58 0 33 35 35 23 40 50 2 64 -57 ... .. .. .. .. .. - 16 32 45 35 58 7 ... .. .. .. .. .. - 14 25 21 36 29 0 - 20 27 30 35 33 27 23 40 57 6 66 -58 ... .. .. .. .. .. - 15 7 43 37 1 16 ... .. .. .. .. .. - 13 13 5 37 26 21 - 18 28 53 36 51 52 23 41 4 8 68 -58 ... .. .. .. .. .. - 13 55 21 37 59 3 ... .. .. .. .. .. - 12 9 19 38 20 8 - 16 58 29 37 58 13 23 41 11 9 69 -57 - 23 38 46 35 55 48 - 12 51 48 38 53 10 ... .. .. .. .. .. - 11 11 58 39 11 17 - 15 43 34 38 58 0 23 41 18 10 70 -57 - 21 1 5 37 32 8 - 11 54 50 39 44 33 - 26 12 39 35 41 23 - 10 19 40 40 0 21 - 14 38 53 39 53 31 23 41 24 12 70 -57 - 19 17 31 38 45 11 - 11 3 3 40 33 50 - 22 29 45 37 46 34 - 9 31 32 40 47 46 - 13 41 38 40 45 58 23 41 31 13 71 -56 - 17 56 17 39 48 43 - 10 15 32 41 21 25 - 20 34 34 39 5 12 - 8 46 53 41 33 49 - 12 50 9 41 36 4 23 41 38 13 72 -56 - 16 48 18 40 46 41 - 9 31 36 42 7 36 - 19 8 23 40 11 26 - 8 5 16 42 18 42 - 12 3 19 42 24 20 23 41 45 14 73 -55 - 15 49 24 41 40 53 - 8 50 44 42 52 38 - 17 57 53 41 11 2 - 7 26 16 43 2 36 - 11 20 23 43 11 6 23 41 52 15 73 -55 - 14 57 17 42 32 20 - 8 12 33 43 36 39 - 16 57 41 42 6 21 - 6 49 37 43 45 39 - 10 40 45 43 56 37 23 41 58 16 74 -54 - 14 10 32 43 21 40 - 7 36 46 44 19 49 - 16 4 59 42 58 37 - 6 15 4 44 27 57 - 10 4 2 44 41 5 23 42 5 16 74 -54 - 13 28 11 44 9 18 - 7 3 9 45 2 14 - 15 18 7 43 48 34 - 5 42 27 45 9 37 - 9 29 54 45 24 38 23 42 12 17 75 -53 - 12 49 34 44 55 32 - 6 31 30 45 44 0 - 14 35 59 44 36 42 - 5 11 35 45 50 42 - 8 58 5 46 7 25 23 42 19 17 76 -53 - 12 14 11 45 40 36 - 6 1 39 46 25 12 - 13 57 50 45 23 21 - 4 42 21 46 31 17 - 8 28 24 46 49 30 23 42 26 18 76 -52 - 11 41 39 46 24 42 - 5 33 30 47 5 52 - 13 23 7 46 8 45 - 4 14 39 47 11 24 - 8 0 40 47 30 59 23 42 32 19 77 -52 - 11 11 42 47 7 56 - 5 6 55 47 46 6 - 12 51 27 46 53 7 - 3 48 24 47 51 8 - 7 34 47 48 11 56 23 42 39 19 77 -51 - 10 44 6 47 50 25 - 4 41 50 48 25 54 - 12 22 29 47 36 36 - 3 23 30 48 30 29 - 7 10 37 48 52 25 23 42 46 19 78 -50 - 10 18 41 48 32 16 - 4 18 11 49 5 22 - 11 56 2 48 19 17 - 2 59 56 49 9 31 - 6 48 6 49 32 28 23 42 53 20 78 -50 - 9 55 18 49 13 32 - 3 55 53 49 44 29 - 11 31 52 49 1 18 - 2 37 37 49 48 16 - 6 27 9 50 12 9 23 42 59 20 79 -49 - 9 33 51 49 54 17 - 3 34 55 50 23 19 - 11 9 52 49 42 43 - 2 16 31 50 26 44 - 6 7 43 50 51 29 23 43 6 20 79 -49 - 9 14 14 50 34 35 - 3 15 13 51 1 53 - 10 49 55 50 23 36 - 1 56 36 51 4 59 - 5 49 46 51 30 30 23 43 13 21 80 -48 - 8 56 24 51 14 29 - 2 56 47 51 40 13 - 10 31 55 51 4 0 - 1 37 51 51 43 1 - 5 33 16 52 9 15 23 43 20 21 80 -47 - 8 40 18 51 54 0 - 2 39 35 52 18 20 - 10 15 49 51 43 58 - 1 20 15 52 20 52 - 5 18 11 52 47 45 23 43 27 21 81 -47 - 8 25 52 52 33 11 - 2 23 37 52 56 15 - 10 1 33 52 23 33 - 1 3 48 52 58 33 - 5 4 32 53 26 1 23 43 33 22 81 -46 - 8 13 7 53 12 4 - 2 8 52 53 34 0 - 9 49 6 53 2 47 - 0 48 28 53 36 4 - 4 52 18 54 4 5 23 43 40 22 82 -45 - 8 2 1 53 50 40 - 1 55 19 54 11 36 - 9 38 27 53 41 41 - 0 34 17 54 13 28 - 4 41 29 54 41 58 23 43 47 22 82 -45 - 7 52 35 54 29 1 - 1 43 1 54 49 4 - 9 29 36 54 20 17 - 0 21 14 54 50 44 - 4 32 7 55 19 41 23 43 54 22 82 -44 - 7 44 50 55 7 8 - 1 31 57 55 26 25 - 9 22 32 54 58 37 - 0 9 21 55 27 55 - 4 24 12 55 57 14 23 44 1 22 83 -44 - 7 38 45 55 45 2 - 1 22 8 56 3 39 - 9 17 18 55 36 42 0 1 22 56 5 0 - 4 17 47 56 34 40 23 44 7 23 83 -43 - 7 34 24 56 22 44 - 1 13 37 56 40 48 - 9 13 55 56 14 33 0 10 53 56 42 0 - 4 12 54 57 11 57 23 44 14 23 84 -42 - 7 31 49 57 0 15 - 1 6 26 57 17 51 - 9 12 25 56 52 10 0 19 10 57 18 57 - 4 9 35 57 49 8 23 44 21 23 84 -42 - 7 31 3 57 37 35 - 1 0 36 57 54 51 - 9 12 51 57 29 35 0 26 10 57 55 50 - 4 7 54 58 26 12 23 44 28 23 84 -41 - 7 32 9 58 14 46 - 0 56 11 58 31 46 - 9 15 18 58 6 47 0 31 52 58 32 41 - 4 7 54 59 3 10 23 44 35 23 84 -41 - 7 35 12 58 51 46 - 0 53 14 59 8 39 - 9 19 50 58 43 48 0 36 12 59 9 29 - 4 9 41 59 40 2 23 44 41 23 85 -40 - 7 40 18 59 28 38 - 0 51 49 59 45 28 - 9 26 31 59 20 38 0 39 6 59 46 16 - 4 13 20 60 16 50 23 44 48 23 85 -39 - 7 47 31 60 5 20 - 0 52 1 60 22 15 - 9 35 29 59 57 16 0 40 31 60 23 1 - 4 18 56 60 53 32 23 44 55 23 85 -39 - 7 56 58 60 41 54 - 0 53 53 60 59 0 - 9 46 50 60 33 42 0 40 21 60 59 46 - 4 26 35 61 30 9 23 45 2 23 85 -38 - 8 8 47 61 18 18 - 0 57 33 61 35 43 - 10 0 42 61 9 58 0 38 32 61 36 29 - 4 36 26 62 6 41 23 45 9 23 85 -37 - 8 23 6 61 54 32 - 1 3 7 62 12 25 - 10 17 13 61 46 1 0 34 57 62 13 13 - 4 48 36 62 43 8 23 45 15 23 86 -37 - 8 40 5 62 30 37 - 1 10 42 62 49 4 - 10 36 34 62 21 51 0 29 30 62 49 56 - 5 3 16 63 19 29 23 45 22 23 86 -36 - 8 59 53 63 6 32 - 1 20 25 63 25 43 - 10 58 55 62 57 28 0 22 3 63 26 39 - 5 20 35 63 55 45 23 45 29 23 86 -36 - 9 22 44 63 42 15 - 1 32 27 64 2 19 - 11 24 29 63 32 51 0 12 28 64 3 23 - 5 40 45 64 31 55 23 45 36 23 86 -35 - 9 48 49 64 17 46 - 1 46 58 64 38 54 - 11 53 29 64 7 58 0 0 35 64 40 6 - 6 4 0 65 7 57 23 45 43 23 86 -34 - 10 18 23 64 53 4 - 2 4 8 65 15 27 - 12 26 10 64 42 48 - 0 13 48 65 16 49 - 6 30 34 65 43 51 23 45 49 23 85 -34 - 10 51 43 65 28 6 - 2 24 12 65 51 57 - 13 2 49 65 17 18 - 0 30 51 65 53 31 - 7 0 44 66 19 35 23 45 56 22 85 -33 - 11 29 7 66 2 51 - 2 47 24 66 28 23 - 13 43 46 65 51 27 - 0 50 49 66 30 12 - 7 34 48 66 55 9 23 46 3 22 85 -33 - 12 10 54 66 37 16 - 3 14 0 67 4 45 - 14 29 19 66 25 11 - 1 13 57 67 6 51 - 8 13 7 67 30 30 23 46 10 22 85 -32 - 12 57 27 67 11 19 - 3 44 20 67 41 1 - 15 19 53 66 58 27 - 1 40 33 67 43 28 - 8 56 5 68 5 35 23 46 17 22 84 -31 - 13 49 11 67 44 56 - 4 18 43 68 17 11 - 16 15 52 67 31 11 - 2 10 56 68 20 1 - 9 44 6 68 40 23 23 46 23 22 84 -31 - 14 46 32 68 18 3 - 4 57 35 68 53 11 - 17 17 43 68 3 19 - 2 45 30 68 56 28 - 10 37 40 69 14 49 23 46 30 21 83 -30 - 15 50 0 68 50 36 - 5 41 21 69 29 1 - 18 25 56 68 34 43 - 3 24 39 69 32 49 - 11 37 20 69 48 49 23 46 37 21 83 -29 - 17 0 8 69 22 27 - 6 30 33 70 4 37 - 19 41 4 69 5 18 - 4 8 52 70 9 1 - 12 43 40 70 22 19 23 46 44 21 82 -29 - 18 17 31 69 53 31 - 7 25 43 70 39 55 - 21 3 41 69 34 56 - 4 58 43 70 45 1 - 13 57 20 70 55 12 23 46 51 21 81 -28 - 19 42 48 70 23 40 - 8 27 30 71 14 53 - 22 34 24 70 3 27 - 5 54 48 71 20 45 - 15 19 3 71 27 23 23 46 57 20 80 -28 - 21 16 39 70 52 43 - 9 36 39 71 49 24 - 24 13 51 70 30 39 - 6 57 49 71 56 10 - 16 49 37 71 58 41 23 47 4 20 79 -27 - 22 59 48 71 20 29 - 10 53 56 72 23 22 - 26 2 44 70 56 21 - 8 8 35 72 31 11 - 18 29 53 72 28 57 23 47 11 19 77 -26 - 24 52 58 71 46 45 - 12 20 16 72 56 42 - 28 1 42 71 20 16 - 9 27 58 73 5 41 - 20 20 45 72 57 59 23 47 18 19 76 -26 - 26 56 54 72 11 16 - 13 56 38 73 29 12 - 30 11 25 71 42 6 - 10 57 0 73 39 33 - 22 23 8 73 25 33 23 47 24 19 74 -25 - 29 12 20 72 33 41 - 15 44 7 74 0 43 - 32 32 28 72 1 29 - 12 36 46 74 12 38 - 24 37 59 73 51 21 23 47 31 18 72 -24 - 31 39 54 72 53 39 - 17 43 53 74 31 2 - 35 5 24 72 17 59 - 14 28 32 74 44 44 - 27 6 13 74 15 4 23 47 38 18 70 -24 - 34 20 9 73 10 43 - 19 57 10 74 59 53 - 37 50 36 72 31 7 - 16 33 38 75 15 37 - 29 48 38 74 36 17 23 47 45 17 68 -23 - 37 13 27 73 24 24 - 22 25 11 75 26 56 - 40 48 18 72 40 15 - 18 53 26 75 45 1 - 32 45 52 74 54 32 23 47 52 17 65 -22 - 40 19 57 73 34 3 - 25 9 9 75 51 50 - 43 58 29 72 44 40 - 21 29 25 76 12 36 - 35 58 15 75 9 17 23 47 58 16 62 -22 - 43 39 30 73 38 58 - 28 10 6 76 14 8 - 47 20 57 72 43 26 - 24 22 55 76 37 57 - 39 25 47 75 19 53 23 48 5 15 59 -21 - 47 11 37 73 38 15 - 31 28 48 76 33 17 - 50 55 14 72 35 24 - 27 35 10 77 0 36 - 43 7 56 75 25 36 23 48 12 14 56 -20 - 50 55 29 73 30 48 - 35 5 36 76 48 43 - 54 40 52 72 18 58 - 31 7 0 77 19 58 - 47 3 34 75 25 34 23 48 19 14 52 -20 - 54 50 3 73 15 11 - 39 0 11 76 59 41 - 58 37 32 71 51 49 - 34 58 40 77 35 24 - 51 11 0 75 18 45 23 48 26 13 48 -19 - 58 54 16 72 49 22 - 43 11 26 77 5 25 - 62 46 5 71 10 0 - 39 9 40 77 46 9 - 55 27 59 75 3 53 23 48 32 12 44 -18 - 63 7 41 72 10 7 - 47 37 18 77 5 0 - 67 11 10 70 5 15 - 43 38 24 77 51 22 - 59 51 57 74 39 20 23 48 39 11 40 -17 - 67 32 9 71 11 18 - 52 14 47 76 57 25 - 72 17 24 68 8 59 - 48 22 6 77 50 8 - 64 20 26 74 2 43 23 48 46 10 36 -16 - 72 18 35 69 36 27 - 57 0 1 76 41 29 ... .. .. .. .. .. - 53 16 50 77 41 23 - 68 51 58 73 10 7 23 48 53 8 32 -16 ... .. .. .. .. .. - 61 48 42 76 15 46 ... .. .. .. .. .. - 58 17 43 77 23 59 - 73 28 15 71 53 20 23 49 0 6 27 -15 ... .. .. .. .. .. - 66 36 34 75 38 19 ... .. .. .. .. .. - 63 19 26 76 56 32 - 78 25 16 69 45 33 23 49 6 4 23 -13 ... .. .. .. .. .. - 71 20 10 74 46 9 ... .. .. .. .. .. - 68 16 52 76 17 15 Uncertainty in time = +/- 5 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: 2UCAC 39648749 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 43 35.4624 DE: +22 25 43.691 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .019 ) * V mag [mag]: 12.7 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (776) Berbericia approx. diameter [km]: 151 approx. diameter ["]: .097 distance from Earth [AU]: 2.15700 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 589 number of rejected observations: 85 time covered by the observations: 1914 Mar 29 - 2008 Sep 25 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.011, 74° remarks: * orbital elements for (776) Berbericia : Mean anomaly = 38.00435983 deg Arg. of pericenter = 306.94233295 deg Long. of node = 79.86971988 deg Inclination = 18.24796666 deg Eccentricity = 0.16129068 Semimajor axis = 2.93361217 AU Perihelion dist = 2.46044786 AU Mag: H = 7.74, G = 0.34 Epoch of elements : MJD 54756.99000000 TDT (2008 Oct 17.990) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 17 776 Berbericia 23h 45.0m UT 12.7 6 43 35.462 22 25 43.692UCAC 39648749 0.0 12.2 151 15.1 2.157 1.424 11.98 77.7949 22.426 -179.96 -9.67 23.7505 -0.47413 0.78485 4.84653 2.93559 -0.00550 0.00043 2000 36.63323520081011.00000306.942333 79.869720 18.2479670.16129068 2.9336122 2.4604479 7.7 5.00.34 RATE 1.9615520 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.022 82 1.24 0.023 0 54740.5020081017_648749 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 05:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org