IOTA/IOTA-ES occultation update for (3044) Saltykov / TYC 1724-00525-1 event on 2012 Oct 03, 00:18 UT Visible from Russia, Europe, Brazil, Peru Summary ------- On 2012 Oct 03 UT, the 27 km diameter asteroid (3044) Saltykov will occult a 11.3 mag star in the constellation Pegasus for observers along a path across Russia, Europe, Brazil, Peru. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.1 mag to 15.4 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: 26 * date and approx. time of event: 2012 Oct 03, 00:09 - 2012 Oct 03, 00:28 UT * geocentric midpoint of event [JD]: 2456203.5131875 * magnitude of target star: 11.3 * magnitude drop [mag]: 4.1 * estimated maximum duration [s]: 2.5 * Moon: 92 % sunlit, 41° distance * Sun: 161° distance * rough path description: Russia, Europe, Brazil, Peru The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 2.59 * 1 sigma uncertainty interval [seconds]: +/- 7.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .080 +/- .058) * 1 sigma uncertainty ellipse (major, minor, PA): ( .082", .056", 75° ) * approx speed of asteroid's shadow [km/s]: 10.7974 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1724-00525-1 by 3044 Saltykov on 2012 Oct 3 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 ' " Longitude Longitude Longitude Longitude - 97 50 6 -24 0 0 0 28 22 5 67 0 - 98 10 22 - 97 30 1 - 99 58 32 - 95 48 42 Latitude Latitude Latitude Latitude - 97 0 0 -23 38 59 0 28 21 5 67 -1 -23 30 36 -23 47 21 -22 47 4 -24 30 38 - 96 0 0 -23 13 0 0 28 20 6 66 -2 -23 4 34 -23 21 25 -22 20 48 -24 4 56 - 95 0 0 -22 46 7 0 28 19 7 66 -3 -22 37 38 -22 54 35 -21 53 37 -23 38 21 - 94 0 0 -22 18 20 0 28 17 8 66 -4 -22 9 48 -22 26 51 -21 25 32 -23 10 52 - 93 0 0 -21 49 38 0 28 16 9 65 -5 -21 41 4 -21 58 12 -20 56 32 -22 42 29 - 92 0 0 -21 20 1 0 28 14 11 65 -6 -21 11 24 -21 28 39 -20 26 36 -22 13 11 - 91 0 0 -20 49 29 0 28 12 12 65 -7 -20 40 48 -20 58 9 -19 55 43 -21 42 58 - 90 0 0 -20 18 0 0 28 9 13 64 -8 -20 9 16 -20 26 44 -19 23 54 -21 11 50 - 89 0 0 -19 45 35 0 28 7 14 64 -9 -19 36 47 -19 54 22 -18 51 8 -20 39 45 - 88 0 0 -19 12 12 0 28 4 15 64 -10 -19 3 21 -19 21 3 -18 17 24 -20 6 43 - 87 0 0 -18 37 52 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60 49 3 85 0 0 61 27 42 0 9 47 11 290 -3 61 35 57 61 19 28 62 18 46 60 36 53 86 0 0 61 15 18 0 9 46 10 291 -3 61 23 35 61 7 1 62 6 38 60 24 12 87 0 0 61 2 22 0 9 45 10 291 -2 61 10 42 60 54 2 61 53 59 60 11 0 88 0 0 60 48 55 0 9 44 9 292 -2 60 57 18 60 40 32 61 40 50 59 57 16 89 0 0 60 34 55 0 9 43 9 293 -1 60 43 21 60 26 30 61 27 8 59 42 58 90 0 0 60 20 23 0 9 42 8 294 -1 60 28 52 60 11 55 61 12 55 59 28 7 91 0 0 60 5 17 0 9 41 8 295 0 60 13 49 59 56 45 60 58 8 59 12 42 Uncertainty in time = +/- 9 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: TYC 1724-00525-1 * constellation : Pegasus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 48 38.1740 DE: +18 46 18.706 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .025, .032 ) * V mag [mag]: 11.3 * B mag [mag]: 12.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3044) Saltykov approx. diameter [km]: 27 approx. diameter ["]: .024 distance from Earth [AU]: 1.57800 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 808 number of rejected observations: 14 time covered by the observations: 1978 Jul 12 - 2012 Sep 13 1 sigma uncertainty ellipse (major, minor, PA): 0.078, 0.046, 73° remarks: * orbital elements for (3044) Saltykov : Mean anomaly = 40.55019381 deg Arg. of pericenter = 69.51595324 deg Long. of node = 242.61842807 deg Inclination = 13.53375286 deg Eccentricity = 0.15761838 Semimajor axis = 2.85116483 AU Perihelion dist = 2.40176885 AU Mag: H = 11.81, G = 0.15 Epoch of elements : MJD 56203.01300000 TDT (2012 Oct 03.013) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 3 3044 Saltykov 0h 19.0m UT 11.3 23 48 38.174 18 46 18.71TYC 1724-00525-1 12.0 15.4 27 2.5 1.578 -1.715 -23.66 -19.7041 18.779 172.52 -4.04 0.3165 -0.20312 0.20930 -4.37322 -4.24455 0.00116 -0.00141 2000 39.9333582012 930.00000 69.515953242.618428 13.5337530.15761838 2.8511648 2.401768811.8 5.00.15 RATE 2.0472490 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.082 0.056 75 3.59 0.061 0 0 0-4 056197.0020121003_0525-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 21:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org