IOTA/IOTA-ES occultation update for (626) Notburga / HIP 36697 event on 2009 Sep 05, 02:42 UT Visible from Summary ------- On 2009 Sep 05 UT, the 101 km diameter asteroid (626) Notburga will occult a 9.0 mag star in the constellation Lynx for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.8 mag to 13.8 mag (the magnitude of the asteroid) for at most 2.9 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: 87 * date and approx. time of event: 2009 Sep 05, 02:39 - 2009 Sep 05, 02:41 UT * magnitude of target star: 9.0 * magnitude drop [mag]: 4.8 * estimated maximum duration [s]: 2.9 * Moon: 100 % sunlit, 116° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 106 * 1 sigma uncertainty interval [path widths]: +/- 0.58 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .031", 100° ) * approx speed of asteroid's shadow [km/s]: 34.7723 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 36697 by 626 Notburga on 2009 Sep 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 - 15 0 0 15 18 22 2 39 32 0 45 -57 .. .. .. 15 59 16 .. .. .. 16 46 59 - 14 0 0 16 16 40 2 39 32 2 45 -55 15 35 52 16 57 41 14 48 49 17 45 34 - 13 0 0 17 15 1 2 39 32 3 46 -54 16 34 6 17 56 9 15 46 55 18 44 10 - 12 0 0 18 13 22 2 39 33 4 46 -53 17 32 22 18 54 36 16 45 4 19 42 44 - 11 0 0 19 11 40 2 39 33 6 46 -51 18 30 34 19 53 0 17 43 10 20 41 14 - 10 0 0 20 9 51 2 39 34 7 47 -50 19 28 41 20 51 16 18 41 12 21 39 35 - 9 0 0 21 7 53 2 39 34 8 47 -49 20 26 39 21 49 21 19 39 6 22 37 45 - 8 0 0 22 5 42 2 39 35 10 47 -47 21 24 25 22 47 12 20 36 48 23 35 40 - 7 0 0 23 3 14 2 39 36 11 48 -46 22 21 55 23 44 47 21 34 16 24 33 17 - 6 0 0 24 0 27 2 39 37 12 48 -45 23 19 7 24 42 1 22 31 26 25 30 33 - 5 0 0 24 57 18 2 39 38 14 49 -43 24 15 57 25 38 52 23 28 16 26 27 24 - 4 0 0 25 53 43 2 39 39 15 49 -42 25 12 22 26 35 17 24 24 42 27 23 48 - 3 0 0 26 49 40 2 39 40 16 50 -41 26 8 20 27 31 12 25 20 41 28 19 42 - 2 0 0 27 45 5 2 39 41 18 50 -39 27 3 48 28 26 36 26 16 11 29 15 3 - 1 0 0 28 39 57 2 39 43 19 51 -38 27 58 43 29 21 25 27 11 10 30 9 49 0 0 0 29 34 13 2 39 44 20 51 -37 28 53 2 30 15 37 28 5 33 31 3 56 1 0 0 30 27 50 2 39 46 21 52 -36 29 46 44 31 9 9 28 59 20 31 57 23 2 0 0 31 20 46 2 39 47 23 52 -35 30 39 45 32 1 59 29 52 27 32 50 7 3 0 0 32 12 58 2 39 49 24 53 -33 31 32 4 32 54 6 30 44 53 33 42 6 4 0 0 33 4 26 2 39 50 25 54 -32 32 23 39 33 45 27 31 36 35 34 33 18 5 0 0 33 55 7 2 39 52 26 54 -31 33 14 27 34 36 0 32 27 33 35 23 43 6 0 0 34 45 0 2 39 54 27 55 -30 34 4 28 35 25 44 33 17 43 36 13 17 7 0 0 35 34 2 2 39 56 28 56 -29 34 53 40 36 14 38 34 7 4 37 2 0 8 0 0 36 22 14 2 39 58 30 56 -28 35 42 1 37 2 40 34 55 36 37 49 50 9 0 0 37 9 33 2 40 0 31 57 -26 36 29 30 37 49 49 35 43 17 38 36 47 10 0 0 37 55 59 2 40 2 32 58 -25 37 16 6 38 36 4 36 30 5 39 22 49 11 0 0 38 41 30 2 40 3 33 58 -24 38 1 49 39 21 24 37 16 1 40 7 56 12 0 0 39 26 7 2 40 5 34 59 -23 38 46 37 40 5 49 38 1 3 40 52 7 13 0 0 40 9 49 2 40 8 35 60 -22 39 30 31 40 49 18 38 45 10 41 35 22 14 0 0 40 52 34 2 40 10 36 61 -21 40 13 29 41 31 51 39 28 22 42 17 40 15 0 0 41 34 24 2 40 12 37 62 -20 40 55 32 42 13 28 40 10 40 42 59 1 16 0 0 42 15 18 2 40 14 38 63 -19 41 36 38 42 54 8 40 52 1 43 39 26 17 0 0 42 55 15 2 40 16 39 63 -18 42 16 49 43 33 52 41 32 27 44 18 54 18 0 0 43 34 17 2 40 18 40 64 -17 42 56 4 44 12 40 42 11 58 44 57 25 19 0 0 44 12 22 2 40 20 41 65 -16 43 34 24 44 50 31 42 50 33 45 35 0 20 0 0 44 49 32 2 40 22 42 66 -15 44 11 48 45 27 27 43 28 13 46 11 38 21 0 0 45 25 46 2 40 24 43 67 -14 44 48 16 46 3 27 44 4 58 46 47 22 22 0 0 46 1 6 2 40 26 43 68 -14 45 23 50 46 38 32 44 40 49 47 22 10 23 0 0 46 35 32 2 40 28 44 69 -13 45 58 30 47 12 43 45 15 45 47 56 3 24 0 0 47 9 3 2 40 31 45 70 -12 46 32 16 47 46 0 45 49 48 48 29 3 25 0 0 47 41 42 2 40 33 46 71 -11 47 5 9 48 18 23 46 22 57 49 1 10 26 0 0 48 13 28 2 40 35 47 72 -10 47 37 10 48 49 55 46 55 14 49 32 24 27 0 0 48 44 22 2 40 37 48 73 -9 48 8 19 49 20 34 47 26 40 50 2 46 28 0 0 49 14 25 2 40 39 48 74 -9 48 38 36 49 50 23 47 57 14 50 32 18 29 0 0 49 43 38 2 40 41 49 75 -8 49 8 4 50 19 22 48 26 58 51 0 59 30 0 0 50 12 2 2 40 43 50 77 -7 49 36 41 50 47 31 48 55 52 51 28 51 31 0 0 50 39 37 2 40 45 51 78 -6 50 4 31 51 14 52 49 23 57 51 55 55 32 0 0 51 6 24 2 40 47 51 79 -6 50 31 32 51 41 25 49 51 14 52 22 12 33 0 0 51 32 25 2 40 49 52 80 -5 50 57 46 52 7 11 50 17 45 52 47 42 34 0 0 51 57 39 2 40 51 53 81 -4 51 23 14 52 32 12 50 43 28 53 12 26 35 0 0 52 22 8 2 40 53 53 83 -3 51 47 57 52 56 27 51 8 26 53 36 25 36 0 0 52 45 53 2 40 55 54 84 -3 52 11 55 53 19 58 51 32 40 53 59 41 37 0 0 53 8 54 2 40 57 55 85 -2 52 35 9 53 42 46 51 56 9 54 22 13 38 0 0 53 31 13 2 40 59 55 86 -1 52 57 41 54 4 52 52 18 56 54 44 4 39 0 0 53 52 50 2 41 1 56 88 -1 53 19 31 54 26 16 52 41 0 55 5 13 Uncertainty in time = +/- 2 secs [Prediction of 2008 Nov 16.0] Data for the target star ------------------------ * name: HIP 36697 * constellation : Lynx * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 32 56.5079 DE: +43 03 16.404 * position source: mpos:HIP2 pm:HIP2 plx:HIP2 * standard error: RA,DE ["]: ( .035, .026 ) * V mag [mag]: 9.0 * B mag [mag]: 10.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (626) Notburga approx. diameter [km]: 101 approx. diameter ["]: .055 distance from Earth [AU]: 2.51100 * orbital information: orbit source: Preston date of fit: 2008 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 662 number of rejected observations: 49 time covered by the observations: 1907 Feb 11 - 2008 Oct 25 1 sigma uncertainty ellipse (major, minor, PA): 0.029, 0.018, 115° remarks: * orbital elements for (626) Notburga : Mean anomaly = 35.76281160 deg Arg. of pericenter = 43.57921779 deg Long. of node = 341.70544131 deg Inclination = 25.35513594 deg Eccentricity = 0.24151001 Semimajor axis = 2.57465353 AU Perihelion dist = 1.95284893 AU Mag: H = 9.09, G = 0.15 Epoch of elements : MJD 55079.11300000 TDT (2009 Sep 05.113) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Sep 5 626 Notburga 2h 42.5m UT 9.0 7 32 56.508 43 3 16.40HIP 36697 10.2 13.8 101 2.9 2.511 6.263 -3.60 88.2759 43.056 139.08 6.80 2.7075 0.01670 0.30312 19.59959 -1.02606 -0.00405 0.00180 2000 33.5886732009 827.00000 43.579218341.705441 25.3551360.24151001 2.5746535 1.9528489 9.0 5.00.15 RATE 2.3857550 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.031 100 1.58 0.032 0 54786.5020090905__36697 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Nov 16, 16:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org