IOTA/IOTA-ES occultation update for (735) Marghanna / 2UCAC 42738273 event on 2007 Sep 02, 21:02 UT Visible from Russia Summary ------- On 2007 Sep 02 UT, the 74 km diameter asteroid (735) Marghanna will occult a 11.1 mag star in the constellation Auriga for observers along a path across Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.5 mag to 14.6 mag (the magnitude of the asteroid) for at most 2.5 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: UCAC. The event at a glimpse ---------------------- * Rank: 72 * date and approx. time of event: 2007 Sep 02, 21:01 - 2007 Sep 02, 21:04 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 3.5 * estimated maximum duration [s]: 2.5 * Moon: 64 % sunlit, 44° distance * Sun: 62° distance * rough path description: Russia The occultation path -------------------- * approximate projected width [km]: 188 * 1 sigma uncertainty interval [path widths]: +/- 0.81 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .031) * 1 sigma uncertainty ellipse (major, minor, PA): ( .037", .031", 89° ) * approx speed of asteroid's shadow [km/s]: 30.1662 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 42738273 by 735 Marghanna on 2007 Sep 02 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 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. 42 44 31 48 44 28 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. 38 48 36 47 18 54 ... .. .. .. .. .. 44 18 33 50 20 25 36 32 13 46 42 9 21 1 32 2 44 -35 ... .. .. .. .. .. 41 7 27 49 31 42 ... .. .. .. .. .. 45 32 15 51 41 24 39 30 16 49 27 31 21 1 34 5 46 -33 ... .. .. .. .. .. 42 37 43 51 7 47 ... .. .. .. .. .. 46 33 43 52 53 31 41 7 28 51 10 51 21 1 36 7 48 -31 37 37 50 49 11 44 43 47 31 52 28 39 ... .. .. .. .. .. 47 26 40 53 59 36 42 19 28 52 35 13 21 1 38 9 49 -30 39 28 0 51 7 20 44 45 0 53 40 34 ... .. .. .. .. .. 48 13 10 55 1 14 43 17 22 53 49 15 21 1 41 10 49 -28 40 44 3 52 36 49 45 33 54 54 46 25 34 48 22 49 8 2 48 54 31 55 59 26 44 5 46 54 56 30 21 1 43 11 50 -27 41 43 13 53 53 44 46 16 16 55 47 48 36 57 49 51 23 16 49 31 34 56 54 51 44 47 3 55 58 52 21 1 45 12 51 -26 42 31 34 55 2 50 46 53 22 56 45 44 38 16 35 52 58 42 50 4 54 57 47 59 45 22 41 56 57 30 21 1 47 13 52 -25 43 12 3 56 6 29 47 26 1 57 40 52 39 14 49 54 18 30 50 34 58 58 39 10 45 53 34 57 53 10 21 1 49 14 52 -24 43 46 22 57 6 2 47 54 49 58 33 42 40 0 41 55 29 15 51 2 4 59 28 42 46 20 20 58 46 23 21 1 51 14 53 -24 44 15 33 58 2 22 48 20 10 59 24 35 40 37 47 56 33 52 51 26 26 60 16 47 46 43 27 59 37 33 21 1 53 15 53 -23 44 40 19 58 56 4 48 42 23 60 13 47 41 8 8 57 33 59 51 48 15 61 3 36 47 3 11 60 26 57 21 1 56 16 54 -22 45 1 9 59 47 35 49 1 39 61 1 32 41 32 54 58 30 36 52 7 38 61 49 17 47 19 48 61 14 49 21 1 58 16 54 -21 45 18 23 60 37 13 49 18 8 61 47 59 41 52 50 59 24 23 52 24 41 62 33 57 47 33 26 62 1 19 21 2 0 17 54 -20 45 32 16 61 25 13 49 31 57 62 33 17 42 8 29 60 15 49 52 39 27 63 17 41 47 44 12 62 46 37 21 2 2 17 55 -19 45 42 57 62 11 47 49 43 10 63 17 32 42 20 12 61 5 15 52 51 58 64 0 36 47 52 9 63 30 49 21 2 4 18 55 -19 45 50 33 62 57 5 49 51 48 64 0 51 42 28 13 61 52 56 53 2 15 64 42 45 47 57 19 64 14 1 21 2 6 18 55 -18 45 55 7 63 41 12 49 57 52 64 43 17 42 32 41 62 39 4 53 10 16 65 24 11 47 59 42 64 56 19 21 2 9 19 56 -17 45 56 41 64 24 17 50 1 21 65 24 56 42 33 42 63 23 50 53 16 0 66 4 58 47 59 16 65 37 46 21 2 11 19 56 -17 45 55 15 65 6 23 50 2 12 66 5 50 42 31 20 64 7 21 53 19 24 66 45 8 47 55 58 66 18 25 21 2 13 20 56 -16 45 50 45 65 47 34 50 0 21 66 46 2 42 25 35 64 49 43 53 20 23 67 24 43 47 49 43 66 58 19 21 2 15 20 56 -15 45 43 8 66 27 55 49 55 44 67 25 34 42 16 25 65 31 1 53 18 51 68 3 46 47 40 26 67 37 30 21 2 17 20 56 -15 45 32 19 67 7 27 49 48 14 68 4 28 42 3 46 66 11 19 53 14 43 68 42 17 47 27 58 68 16 0 21 2 19 20 56 -14 45 18 10 67 46 12 49 37 43 68 42 46 41 47 34 66 50 39 53 7 49 69 20 19 47 12 10 68 53 51 21 2 22 21 56 -13 45 0 34 68 24 13 49 24 1 69 20 29 41 27 42 67 29 4 52 58 2 69 57 51 46 52 54 69 31 3 21 2 24 21 56 -13 44 39 21 69 1 30 49 6 58 69 57 37 41 4 2 68 6 37 52 45 9 70 34 56 46 29 55 70 7 36 21 2 26 21 56 -12 44 14 19 69 38 4 48 46 21 70 34 11 40 36 24 68 43 17 52 28 59 71 11 32 46 3 2 70 43 32 21 2 28 21 56 -12 43 45 17 70 13 56 48 21 57 71 10 12 40 4 37 69 19 5 52 9 16 71 47 41 45 31 58 71 18 49 21 2 30 22 55 -11 43 11 58 70 49 4 47 53 30 71 45 39 39 28 29 69 54 2 51 45 46 72 23 22 44 56 26 71 53 27 21 2 32 22 55 -10 42 34 8 71 23 29 47 20 41 72 20 31 38 47 46 70 28 7 51 18 9 72 58 35 44 16 9 72 27 26 21 2 34 22 55 -10 41 51 29 71 57 9 46 43 11 72 54 47 38 2 14 71 1 19 50 46 4 73 33 19 43 30 44 73 0 43 21 2 37 22 54 -9 41 3 41 72 30 3 46 0 38 73 28 28 37 11 37 71 33 37 50 9 9 74 7 34 42 39 49 73 33 18 21 2 39 22 54 -9 40 10 25 73 2 9 45 12 37 74 1 29 36 15 36 72 4 58 49 26 55 74 41 18 41 42 59 74 5 7 21 2 41 22 53 -8 39 11 16 73 33 25 44 18 40 74 33 51 35 13 56 72 35 21 48 38 55 75 14 28 40 39 47 74 36 8 21 2 43 22 52 -8 38 5 53 74 3 48 43 18 18 75 5 29 34 6 16 73 4 42 47 44 33 75 47 4 39 29 44 75 6 17 21 2 45 23 51 -7 36 53 48 74 33 14 42 10 59 75 36 21 32 52 18 73 32 58 46 43 12 76 19 2 38 12 20 75 35 31 21 2 47 23 50 -7 35 34 37 75 1 39 40 56 6 76 6 23 31 31 43 74 0 4 45 34 12 76 50 19 36 47 1 76 3 44 21 2 50 23 49 -6 34 7 53 75 28 59 39 33 3 76 35 30 30 4 14 74 25 57 44 16 45 77 20 50 35 13 17 76 30 52 21 2 52 23 48 -6 32 33 10 75 55 7 38 1 10 77 3 37 28 29 34 74 50 30 42 50 2 77 50 31 33 30 33 76 56 48 21 2 54 23 47 -5 30 50 4 76 19 58 36 19 47 77 30 38 26 47 29 75 13 38 41 13 7 78 19 16 31 38 20 77 21 25 21 2 56 23 45 -5 28 58 11 76 43 25 34 28 12 77 56 26 24 57 48 75 35 14 39 25 4 78 46 58 29 36 10 77 44 35 21 2 58 23 43 -4 26 57 14 77 5 21 32 25 46 78 20 52 23 0 24 75 55 11 37 24 52 79 13 29 27 23 39 78 6 10 21 3 0 23 41 -4 24 47 0 77 25 36 30 11 56 78 43 49 20 55 20 76 13 22 35 11 30 79 38 40 25 0 34 78 26 0 21 3 3 23 39 -3 22 27 26 77 44 3 27 46 11 79 5 4 18 42 41 76 29 40 32 44 3 80 2 20 22 26 51 78 43 55 21 3 5 22 37 -3 19 58 37 78 0 31 25 8 15 79 24 29 16 22 44 76 43 55 30 1 40 80 24 17 19 42 39 78 59 44 21 3 7 22 35 -2 17 20 53 78 14 52 22 18 5 79 41 51 13 55 56 76 55 59 27 3 45 80 44 18 16 48 26 79 13 17 21 3 9 22 32 -2 14 34 47 78 26 55 19 15 57 79 56 57 11 22 55 77 5 45 23 50 3 81 2 9 13 44 59 79 24 21 21 3 11 22 29 -1 11 41 9 78 36 31 16 2 32 80 9 36 8 44 29 77 13 4 20 20 50 81 17 33 10 33 28 79 32 48 21 3 13 22 26 -1 8 41 6 78 43 30 12 38 58 80 19 35 6 1 38 77 17 50 16 36 57 81 30 16 7 15 22 79 38 27 21 3 15 22 23 -1 5 36 0 78 47 45 9 6 51 80 26 43 3 15 32 77 19 55 12 40 2 81 40 2 3 52 31 79 41 10 21 3 18 22 20 0 2 27 27 78 49 9 5 28 15 80 30 49 0 27 28 77 19 14 8 32 29 81 46 37 0 27 1 79 40 50 21 3 20 21 17 0 - 0 42 45 78 47 35 1 45 38 80 31 46 - 2 21 11 77 15 43 4 17 29 81 49 49 - 2 58 53 79 37 23 21 3 22 21 14 1 - 3 52 45 78 43 1 - 1 58 17 80 29 27 - 5 9 0 77 9 17 - 0 1 13 81 49 30 - 6 22 54 79 30 46 21 3 24 21 11 1 - 7 0 39 78 35 23 - 5 40 40 80 23 51 - 7 54 35 76 59 55 - 4 19 35 81 45 35 - 9 42 50 79 20 59 21 3 26 21 8 1 - 10 4 41 78 24 42 - 9 18 48 80 14 56 - 10 36 38 76 47 35 - 8 33 30 81 38 3 - 12 56 43 79 8 4 21 3 28 20 5 2 - 13 3 14 78 10 57 - 12 50 10 80 2 46 - 13 13 56 76 32 18 - 12 39 18 81 26 57 - 16 2 48 78 52 4 21 3 31 20 2 2 - 15 54 53 77 54 12 - 16 12 41 79 47 23 - 15 45 27 76 14 2 - 16 33 51 81 12 25 - 18 59 46 78 33 3 21 3 33 20 359 2 - 18 38 30 77 34 30 - 19 24 39 79 28 55 - 18 10 19 75 52 49 - 20 14 46 80 54 35 - 21 46 35 78 11 5 21 3 35 19 357 3 - 21 13 14 77 11 52 - 22 24 56 79 7 28 - 20 27 48 75 28 38 - 23 40 29 80 33 36 - 24 22 35 77 46 18 21 3 37 19 354 3 - 23 38 28 76 46 23 - 25 12 45 78 43 9 - 22 37 25 75 1 31 - 26 50 9 80 9 41 - 26 47 27 77 18 44 21 3 39 19 352 3 - 25 53 52 76 18 6 - 27 47 49 78 16 5 - 24 38 47 74 31 26 - 29 43 32 79 43 0 - 29 1 3 76 48 28 21 3 41 18 350 4 - 27 59 14 75 47 2 - 30 10 6 77 46 22 - 26 31 41 73 58 19 - 32 20 54 79 13 43 - 31 3 29 76 15 34 21 3 43 18 349 4 - 29 54 36 75 13 12 - 32 19 50 77 14 6 - 28 16 1 73 22 8 - 34 42 50 78 41 58 - 32 55 1 75 40 3 21 3 46 17 347 4 - 31 40 5 74 36 35 - 34 17 25 76 39 20 - 29 51 45 72 42 45 - 36 50 8 78 7 53 - 34 35 58 75 1 55 21 3 48 17 345 5 - 33 15 53 73 57 8 - 36 3 23 76 2 7 - 31 18 53 71 59 59 - 38 43 41 77 31 33 - 36 6 45 74 21 6 21 3 50 16 344 5 - 34 42 14 73 14 44 - 37 38 17 75 22 27 - 32 37 27 71 13 33 - 40 24 28 76 53 1 - 37 27 46 73 37 32 21 3 52 16 343 5 - 35 59 25 72 29 14 - 39 2 43 74 40 17 - 33 47 29 70 23 5 - 41 53 23 76 12 18 - 38 39 25 72 51 5 21 3 54 15 342 5 - 37 7 40 71 40 24 - 40 17 14 73 55 32 - 34 48 55 69 27 59 - 43 11 19 75 29 24 - 39 42 2 72 1 30 21 3 56 14 341 5 - 38 7 8 70 47 51 - 41 22 21 73 8 5 - 35 41 33 68 27 26 - 44 19 4 74 44 16 - 40 35 55 71 8 28 21 3 59 14 341 6 - 38 57 56 69 51 4 - 42 18 30 72 17 43 - 36 24 57 67 20 4 - 45 17 20 73 56 46 - 41 21 12 70 11 32 21 4 1 13 340 6 - 39 39 58 68 49 20 - 43 6 1 71 24 8 - 36 58 10 66 3 38 - 46 6 44 73 6 47 - 41 57 54 69 10 3 21 4 3 12 340 6 - 40 12 55 67 41 27 - 43 45 10 70 26 54 - 37 19 12 64 33 50 - 46 47 44 72 14 4 - 42 25 48 68 2 59 21 4 5 11 339 6 - 40 35 58 66 25 32 - 44 15 58 69 25 26 - 37 22 57 62 40 23 - 47 20 43 71 18 18 - 42 44 14 66 48 46 21 4 7 10 339 6 - 40 47 27 64 58 14 - 44 38 17 68 18 50 - 36 44 51 59 34 31 - 47 45 52 70 19 3 - 42 51 52 65 24 43 21 4 9 8 339 6 - 40 43 21 63 12 16 - 44 51 33 67 5 44 ... .. .. .. .. .. - 48 3 14 69 15 43 - 42 45 38 63 45 30 21 4 12 7 339 5 - 40 10 16 60 44 7 - 44 54 39 65 43 52 ... .. .. .. .. .. - 48 12 35 68 7 22 - 42 17 5 61 37 7 21 4 14 5 340 5 ... .. .. .. .. .. - 44 45 3 64 9 1 ... .. .. .. .. .. - 48 13 17 66 52 39 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. - 44 16 32 62 11 20 ... .. .. .. .. .. - 48 4 3 65 29 19 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. - 43 2 20 59 9 24 ... .. .. .. .. .. - 47 42 11 63 53 12 Data for the target star ------------------------ * name: 2UCAC 42738273 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 36 30.6807 DE: +31 23 03.485 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .033, .029 ) * V mag [mag]: 11.1 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (735) Marghanna approx. diameter [km]: 74 approx. diameter ["]: .038 distance from Earth [AU]: 2.65200 * orbital information: orbit source: Preston date of fit: 2007 Aug 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 659 number of rejected observations: 53 time covered by the observations: 1912 Dec 09 - 2006 Nov 23 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.011, 84° remarks: * orbital elements for (735) Marghanna : Mean anomaly = 48.33966470 deg Arg. of pericenter = 310.14668047 deg Long. of node = 43.02937818 deg Inclination = 16.87883488 deg Eccentricity = 0.32165263 Semimajor axis = 2.72985267 AU Perihelion dist = 1.85178838 AU Mag: H = 9.61, G = 0.15 Epoch of elements : MJD 54345.87700000 TDT (2007 Sep 02.877) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Sep 02 735 Marghanna 21h 2.9m UT 11.1 6 36 30.681 31 23 3.492UCAC 42738273 0.0 14.6 74 2.5 2.652 4.326 10.92 -198.227 31.382 -135.80 7.81 21.0483 -.17760 .90201 16.70518 3.29294 -0.00476 0.00067 2000 47.05541092007 828.00000310.146680 43.029378 16.8788350.321652632.729852671.851788389.555 0.15 RATE 2.1852204 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.037 0.031 88.9 1.810 0.031 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Aug 28, 23:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org