IOTA/IOTA-ES occultation update for (4135) Svetlanov / HIP 117137 event on 2008 Aug 01, 04:40 UT Visible from Africa, Brazil, Peru Summary ------- On 2008 Aug 01 UT, the 13 km diameter asteroid (4135) Svetlanov will occult a 6.9 mag star in the constellation Pisces for observers along a path across Africa, Brazil, Peru. In the case of an occultation, the combined light of the asteroid and the star will drop by 8.8 mag to 15.7 mag (the magnitude of the asteroid) for at most 6.1 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: 11 * date and approx. time of event: 2008 Aug 01, 03:50 - 2008 Aug 01, 05:14 UT * magnitude of target star: 6.9 * magnitude drop [mag]: 8.8 * estimated maximum duration [s]: 6.1 * Moon: 0 % sunlit, 126° distance * Sun: 129° distance * rough path description: Africa, Brazil, Peru The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 5.84 * 1 sigma uncertainty interval [seconds]: +/- 70.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .135 +/- .075) * 1 sigma uncertainty ellipse (major, minor, PA): ( .139", .068", 75° ) * approx speed of asteroid's shadow [km/s]: 2.0575 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 117137 by 4135 Svetlanov on 2008 Aug 1 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 - 99 0 0 -18 36 19 3 50 54 0 82 -49 -18 39 53 -18 32 45 .. .. .. -17 51 1 - 98 0 0 -18 28 23 3 50 54 1 82 -50 -18 31 58 -18 24 49 -19 13 41 -17 43 2 - 97 0 0 -18 20 3 3 50 55 2 82 -51 -18 23 37 -18 16 28 -19 5 23 -17 34 38 - 96 0 0 -18 11 16 3 50 58 3 81 -52 -18 14 51 -18 7 41 -18 56 40 -17 25 48 - 95 0 0 -18 2 4 3 51 1 4 81 -53 -18 5 39 -17 58 29 -18 47 32 -17 16 33 - 94 0 0 -17 52 26 3 51 5 5 81 -54 -17 56 1 -17 48 50 -18 37 57 -17 6 50 - 93 0 0 -17 42 21 3 51 10 6 80 -55 -17 45 57 -17 38 45 -18 27 56 -16 56 41 - 92 0 0 -17 31 49 3 51 16 7 80 -56 -17 35 25 -17 28 13 -18 17 29 -16 46 6 - 91 0 0 -17 20 51 3 51 23 8 80 -57 -17 24 27 -17 17 14 -18 6 35 -16 35 3 - 90 0 0 -17 9 25 3 51 31 9 80 -58 -17 13 2 -17 5 48 -17 55 13 -16 23 33 - 89 0 0 -16 57 32 3 51 40 10 79 -59 -17 1 9 -16 53 55 -17 43 25 -16 11 35 - 88 0 0 -16 45 11 3 51 50 11 79 -60 -16 48 49 -16 41 33 -17 31 9 -15 59 9 - 87 0 0 -16 32 22 3 52 1 12 79 -61 -16 36 0 -16 28 44 -17 18 25 -15 46 15 - 86 0 0 -16 19 5 3 52 13 13 78 -62 -16 22 43 -16 15 27 -17 5 13 -15 32 52 - 85 0 0 -16 5 19 3 52 26 14 78 -63 -16 8 58 -16 1 40 -16 51 33 -15 19 1 - 84 0 0 -15 51 5 3 52 40 15 78 -64 -15 54 44 -15 47 25 -16 37 24 -15 4 41 - 83 0 0 -15 36 21 3 52 55 16 77 -65 -15 40 1 -15 32 41 -16 22 46 -14 49 52 - 82 0 0 -15 21 8 3 53 12 17 77 -66 -15 24 49 -15 17 28 -16 7 39 -14 34 33 - 81 0 0 -15 5 26 3 53 29 18 77 -67 -15 9 7 -15 1 45 -15 52 3 -14 18 44 - 80 0 0 -14 49 14 3 53 48 19 77 -68 -14 52 55 -14 45 32 -15 35 57 -14 2 25 - 79 0 0 -14 32 31 3 54 8 20 76 -68 -14 36 13 -14 28 50 -15 19 21 -13 45 36 - 78 0 0 -14 15 19 3 54 29 22 76 -69 -14 19 1 -14 11 37 -15 2 15 -13 28 17 - 77 0 0 -13 57 36 3 54 51 23 76 -70 -14 1 19 -13 53 53 -14 44 39 -13 10 27 - 76 0 0 -13 39 22 3 55 15 24 76 -71 -13 43 6 -13 35 39 -14 26 33 -12 52 6 - 75 0 0 -13 20 38 3 55 39 25 75 -72 -13 24 22 -13 16 54 -14 7 55 -12 33 14 - 74 0 0 -13 1 22 3 56 5 26 75 -73 -13 5 7 -12 57 37 -13 48 47 -12 13 51 - 73 0 0 -12 41 35 3 56 33 27 75 -74 -12 45 20 -12 37 50 -13 29 8 -11 53 57 - 72 0 0 -12 21 17 3 57 1 28 75 -75 -12 25 3 -12 17 31 -13 8 57 -11 33 31 - 71 0 0 -12 0 27 3 57 31 29 75 -76 -12 4 14 -11 56 41 -12 48 16 -11 12 33 - 70 0 0 -11 39 6 3 58 3 31 74 -77 -11 42 53 -11 35 19 -12 27 2 -10 51 3 - 69 0 0 -11 17 13 3 58 35 32 74 -77 -11 21 1 -11 13 25 -12 5 18 -10 29 2 - 68 0 0 -10 54 48 3 59 9 33 74 -78 -10 58 37 -10 51 0 -11 43 1 -10 6 29 - 67 0 0 -10 31 52 3 59 45 34 74 -79 -10 35 41 -10 28 3 -11 20 13 - 9 43 25 - 66 0 0 -10 8 24 4 0 22 35 74 -79 -10 12 14 -10 4 34 -10 56 54 - 9 19 48 - 65 0 0 - 9 44 25 4 1 0 37 73 -80 - 9 48 15 - 9 40 34 -10 33 3 - 8 55 40 - 64 0 0 - 9 19 53 4 1 40 38 73 -80 - 9 23 45 - 9 16 2 -10 8 40 - 8 31 0 - 63 0 0 - 8 54 51 4 2 21 39 73 -80 - 8 58 43 - 8 50 59 - 9 43 47 - 8 5 49 - 62 0 0 - 8 29 17 4 3 3 40 73 -80 - 8 33 10 - 8 25 25 - 9 18 22 - 7 40 6 - 61 0 0 - 8 3 13 4 3 47 41 73 -80 - 8 7 6 - 7 59 20 - 8 52 26 - 7 13 53 - 60 0 0 - 7 36 38 4 4 33 43 73 -80 - 7 40 32 - 7 32 44 - 8 26 0 - 6 47 9 - 59 0 0 - 7 9 32 4 5 20 44 73 -79 - 7 13 27 - 7 5 38 - 7 59 3 - 6 19 55 - 58 0 0 - 6 41 57 4 6 8 45 73 -79 - 6 45 52 - 6 38 2 - 7 31 36 - 5 52 11 - 57 0 0 - 6 13 53 4 6 58 47 73 -78 - 6 17 48 - 6 9 57 - 7 3 40 - 5 23 58 - 56 0 0 - 5 45 19 4 7 50 48 73 -77 - 5 49 16 - 5 41 23 - 6 35 15 - 4 55 16 - 55 0 0 - 5 16 18 4 8 42 49 73 -76 - 5 20 15 - 5 12 20 - 6 6 22 - 4 26 6 - 54 0 0 - 4 46 49 4 9 37 50 73 -75 - 4 50 46 - 4 42 51 - 5 37 1 - 3 56 29 - 53 0 0 - 4 16 53 4 10 32 52 73 -74 - 4 20 51 - 4 12 54 - 5 7 14 - 3 26 25 - 52 0 0 - 3 46 31 4 11 29 53 73 -73 - 3 50 30 - 3 42 32 - 4 37 0 - 2 55 56 - 51 0 0 - 3 15 45 4 12 28 54 73 -72 - 3 19 45 - 3 11 45 - 4 6 21 - 2 25 2 - 50 0 0 - 2 44 35 4 13 28 56 73 -71 - 2 48 35 - 2 40 34 - 3 35 18 - 1 53 45 - 49 0 0 - 2 13 2 4 14 29 57 73 -70 - 2 17 2 - 2 9 1 - 3 3 52 - 1 22 5 - 48 0 0 - 1 41 7 4 15 31 58 73 -69 - 1 45 8 - 1 37 6 - 2 32 4 - 0 50 4 - 47 0 0 - 1 8 52 4 16 35 60 73 -67 - 1 12 54 - 1 4 50 - 1 59 55 - 0 17 43 - 46 0 0 - 0 36 18 4 17 40 61 74 -66 - 0 40 21 - 0 32 16 - 1 27 27 0 14 57 - 45 0 0 - 0 3 27 4 18 46 63 74 -65 - 0 7 30 0 0 36 - 0 54 41 0 47 53 - 44 0 0 0 29 40 4 19 54 64 74 -63 0 25 37 0 33 43 - 0 21 39 1 21 5 - 43 0 0 1 3 2 4 21 2 65 75 -62 0 58 58 1 7 5 0 11 38 1 54 31 - 42 0 0 1 36 36 4 22 12 67 75 -61 1 32 32 1 40 39 0 45 9 2 28 8 - 41 0 0 2 10 21 4 23 22 68 76 -60 2 6 17 2 14 25 1 18 50 3 1 56 - 40 0 0 2 44 15 4 24 33 70 76 -58 2 40 11 2 48 19 1 52 42 3 35 53 - 39 0 0 3 18 16 4 25 45 71 77 -57 3 14 12 3 22 20 2 26 41 4 9 56 - 38 0 0 3 52 23 4 26 58 72 78 -55 3 48 18 3 56 27 3 0 46 4 44 4 - 37 0 0 4 26 33 4 28 12 74 79 -54 4 22 28 4 30 37 3 34 56 5 18 14 - 36 0 0 5 0 44 4 29 26 75 81 -53 4 56 40 5 4 49 4 9 7 5 52 26 - 35 0 0 5 34 55 4 30 41 76 82 -51 5 30 51 5 38 59 4 43 18 6 26 36 - 34 0 0 6 9 3 4 31 56 78 84 -50 6 4 59 6 13 8 5 17 28 7 0 42 - 33 0 0 6 43 7 4 33 12 79 86 -49 6 39 3 6 47 11 5 51 33 7 34 44 - 32 0 0 7 17 4 4 34 27 81 89 -47 7 13 0 7 21 8 6 25 33 8 8 38 - 31 0 0 7 50 52 4 35 44 82 93 -46 7 46 48 7 54 56 6 59 24 8 42 23 - 30 0 0 8 24 29 4 37 0 83 99 -44 8 20 26 8 28 33 7 33 6 9 15 56 - 29 0 0 8 57 55 4 38 16 84 106 -43 8 53 52 9 1 58 8 6 35 9 49 17 - 28 0 0 9 31 5 4 39 32 85 117 -42 9 27 3 9 35 8 8 39 51 10 22 22 - 27 0 0 10 4 0 4 40 48 86 133 -40 9 59 58 10 8 2 9 12 51 10 55 11 - 26 0 0 10 36 36 4 42 4 86 154 -39 10 32 35 10 40 38 9 45 33 11 27 41 - 25 0 0 11 8 53 4 43 20 86 175 -38 11 4 52 11 12 54 10 17 57 11 59 51 - 24 0 0 11 40 48 4 44 35 85 193 -36 11 36 48 11 44 49 10 49 59 12 31 39 - 23 0 0 12 12 21 4 45 50 85 205 -35 12 8 21 12 16 21 11 21 39 13 3 4 - 22 0 0 12 43 29 4 47 5 83 214 -33 12 39 30 12 47 28 11 52 55 13 34 4 - 21 0 0 13 14 11 4 48 19 82 220 -32 13 10 13 13 18 10 12 23 46 14 4 38 - 20 0 0 13 44 27 4 49 32 81 224 -31 13 40 29 13 48 25 12 54 10 14 34 44 - 19 0 0 14 14 14 4 50 45 80 228 -29 14 10 17 14 18 11 13 24 7 15 4 22 - 18 0 0 14 43 32 4 51 57 79 231 -28 14 39 36 14 47 28 13 53 34 15 33 31 - 17 0 0 15 12 20 4 53 8 77 233 -27 15 8 24 15 16 15 14 22 31 16 2 9 - 16 0 0 15 40 36 4 54 18 76 235 -25 15 36 41 15 44 31 14 50 57 16 30 16 - 15 0 0 16 8 20 4 55 28 75 236 -24 16 4 26 16 12 14 15 18 51 16 57 50 - 14 0 0 16 35 32 4 56 36 73 238 -23 16 31 38 16 39 25 15 46 12 17 24 52 - 13 0 0 17 2 10 4 57 44 72 239 -22 16 58 17 17 6 2 16 13 0 17 51 19 - 12 0 0 17 28 14 4 58 51 71 240 -20 17 24 22 17 32 6 16 39 14 18 17 13 - 11 0 0 17 53 43 4 59 57 70 241 -19 17 49 52 17 57 34 17 4 54 18 42 33 - 10 0 0 18 18 37 5 1 1 68 242 -18 18 14 47 18 22 28 17 29 58 19 7 17 - 9 0 0 18 42 56 5 2 5 67 243 -16 18 39 7 18 46 46 17 54 27 19 31 26 - 8 0 0 19 6 40 5 3 8 66 244 -15 19 2 51 19 10 28 18 18 20 19 54 59 - 7 0 0 19 29 47 5 4 9 65 244 -14 19 25 59 19 33 35 18 41 37 20 17 57 - 6 0 0 19 52 18 5 5 10 63 245 -13 19 48 31 19 56 6 19 4 19 20 40 18 - 5 0 0 20 14 14 5 6 9 62 246 -12 20 10 27 20 18 0 19 26 23 21 2 4 - 4 0 0 20 35 33 5 7 7 61 247 -10 20 31 47 20 39 18 19 47 52 21 23 13 - 3 0 0 20 56 15 5 8 5 60 247 -9 20 52 30 21 0 0 20 8 44 21 43 47 - 2 0 0 21 16 22 5 9 1 59 248 -8 21 12 38 21 20 6 20 28 59 22 3 44 - 1 0 0 21 35 52 5 9 55 57 249 -7 21 32 9 21 39 35 20 48 38 22 23 6 0 0 0 21 54 46 5 10 49 56 249 -6 21 51 3 21 58 29 21 7 41 22 41 51 1 0 0 22 13 5 5 11 42 55 250 -4 22 9 22 22 16 47 21 26 8 23 0 1 2 0 0 22 30 47 5 12 33 54 251 -3 22 27 6 22 34 29 21 43 59 23 17 36 3 0 0 22 47 54 5 13 24 53 251 -2 22 44 13 22 51 35 22 1 14 23 34 35 4 0 0 23 4 26 5 14 13 52 252 -1 23 0 45 23 8 6 22 17 53 23 50 59 Uncertainty in time = +/- 71 secs [Prediction of 2008 Jul 22.0] Data for the target star ------------------------ * name: HIP 117137 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 44 48.9589 DE: +07 11 30.406 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .016, .007 ) * V mag [mag]: 6.9 * B mag [mag]: 8.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4135) Svetlanov approx. diameter [km]: 13 approx. diameter ["]: .012 distance from Earth [AU]: 1.44700 * orbital information: orbit source: Preston date of fit: 2008 Jul 22 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 591 number of rejected observations: 16 time covered by the observations: 1929 Oct 02 - 2008 Jun 11 1 sigma uncertainty ellipse (major, minor, PA): 0.138, 0.068, 75° remarks: * orbital elements for (4135) Svetlanov : Mean anomaly = 336.99386135 deg Arg. of pericenter = 175.27169709 deg Long. of node = 200.10246545 deg Inclination = 7.92184495 deg Eccentricity = 0.22981513 Semimajor axis = 2.79025068 AU Perihelion dist = 2.14900885 AU Mag: H = 12.18, G = 0.15 Epoch of elements : MJD 54679.19500000 TDT (2008 Aug 01.195) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Aug 1 4135 Svetlanov 4h 42.3m UT 6.9 23 44 48.959 7 11 30.41HIP 117137 8.0 15.7 13 6.1 1.447 0.438 2.67 -24.5458 7.191 111.00 17.92 4.7054 -0.02351 0.05944 1.07446 0.44061 -0.00356 -0.00209 2000 335.0494372008 723.00000175.271697200.102465 7.9218450.22981513 2.7902507 2.149008912.1 5.00.15 RATE 2.1146540 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.139 0.068 75 6.84 0.072 0 54669.5020080801_117137 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jul 22, 18:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org