IOTA/IOTA-ES occultation update for (3540) Protesilaos / TYC 2519-01341-1 event on 2012 Nov 30, 02:12 UT Visible from Russia, Europe Summary ------- On 2012 Nov 30 UT, the 88 km diameter asteroid (3540) Protesilaos will occult a 11.0 mag star in the constellation Leo Minor for observers along a path across Russia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 16.6 mag (the magnitude of the asteroid) for at most 6.4 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: 29 * date and approx. time of event: 2012 Nov 30, 02:06 - 2012 Nov 30, 02:16 UT * geocentric midpoint of event [JD]: 2456261.59229583 * magnitude of target star: 11.0 * magnitude drop [mag]: 5.6 * estimated maximum duration [s]: 6.4 * Moon: 98 % sunlit, 71° distance * Sun: 94° distance * rough path description: Russia, Europe The occultation path -------------------- * approximate projected width [km]: 110 * 1 sigma uncertainty interval [path widths]: +/- 2.30 * 1 sigma uncertainty interval [seconds]: +/- 12.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .065 +/- .059) * 1 sigma uncertainty ellipse (major, minor, PA): ( .071", .053", 125° ) * approx speed of asteroid's shadow [km/s]: 13.6682 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2519-01341-1 by 3540 Protesilaos on 2012 Nov 30 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 - 40 0 0 22 19 14 2 6 40 0 56 -85 .. .. .. 22 55 33 .. .. .. 25 47 27 - 39 0 0 22 56 45 2 6 40 1 57 -85 22 20 35 23 33 16 .. .. .. 26 26 12 - 38 0 0 23 34 45 2 6 41 2 57 -86 22 58 23 24 11 29 .. .. .. 27 5 27 - 37 0 0 24 13 13 2 6 41 4 58 -86 23 36 39 24 50 9 .. .. .. 27 45 9 - 36 0 0 24 52 8 2 6 42 5 58 -86 24 15 22 25 29 16 .. .. .. 28 25 18 - 35 0 0 25 31 29 2 6 43 6 59 -86 24 54 31 26 8 49 .. .. .. 29 5 52 - 34 0 0 26 11 14 2 6 44 7 59 -85 25 34 4 26 48 46 .. .. .. 29 46 51 - 33 0 0 26 51 21 2 6 46 8 59 -84 26 13 59 27 29 6 .. .. .. 30 28 11 - 32 0 0 27 31 50 2 6 48 9 60 -83 26 54 17 28 9 47 .. .. .. 31 9 52 - 31 0 0 28 12 39 2 6 50 10 60 -83 27 34 54 28 50 47 .. .. .. 31 51 53 - 30 0 0 28 53 46 2 6 52 11 61 -82 28 15 50 29 32 6 .. .. .. 32 34 10 - 29 0 0 29 35 10 2 6 54 12 61 -81 28 57 3 30 13 41 26 6 30 33 16 43 - 28 0 0 30 16 49 2 6 57 14 62 -79 29 38 31 30 55 32 26 47 11 33 59 30 - 27 0 0 30 58 41 2 6 59 15 63 -78 30 20 12 31 37 35 27 28 8 34 42 29 - 26 0 0 31 40 45 2 7 2 16 63 -77 31 2 5 32 19 49 28 9 17 35 25 37 - 25 0 0 32 22 58 2 7 6 17 64 -76 31 44 9 33 2 13 28 50 37 36 8 53 - 24 0 0 33 5 19 2 7 9 18 64 -75 32 26 20 33 44 44 29 32 8 36 52 15 - 23 0 0 33 47 46 2 7 12 19 65 -74 33 8 38 34 27 21 30 13 46 37 35 41 - 22 0 0 34 30 17 2 7 16 20 66 -73 33 51 0 35 10 1 30 55 30 38 19 8 - 21 0 0 35 12 51 2 7 20 21 66 -72 34 33 25 35 52 43 31 37 18 39 2 34 - 20 0 0 35 55 24 2 7 24 22 67 -71 35 15 50 36 35 25 32 19 9 39 45 58 - 19 0 0 36 37 55 2 7 28 23 68 -70 35 58 14 37 18 4 33 1 1 40 29 16 - 18 0 0 37 20 22 2 7 33 24 69 -69 36 40 34 38 0 39 33 42 51 41 12 28 - 17 0 0 38 2 44 2 7 37 25 69 -68 37 22 49 38 43 7 34 24 38 41 55 30 - 16 0 0 38 44 57 2 7 42 26 70 -67 38 4 56 39 25 26 35 6 20 42 38 21 - 15 0 0 39 27 1 2 7 47 27 71 -65 38 46 55 40 7 35 35 47 55 43 20 58 - 14 0 0 40 8 53 2 7 52 28 72 -64 39 28 42 40 49 32 36 29 22 44 3 19 - 13 0 0 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45 234 -5 67 49 43 68 50 48 65 32 12 71 14 36 104 0 0 68 14 23 2 15 46 45 236 -4 67 43 51 68 45 7 65 25 55 71 9 23 105 0 0 68 8 18 2 15 49 45 237 -4 67 37 41 68 39 8 65 19 20 71 3 53 106 0 0 68 1 56 2 15 52 45 238 -4 67 31 12 68 32 52 65 12 24 70 58 7 107 0 0 67 55 15 2 15 54 44 239 -3 67 24 25 68 26 17 65 5 9 70 52 3 108 0 0 67 48 15 2 15 57 44 241 -3 67 17 18 68 19 24 64 57 34 70 45 43 109 0 0 67 40 56 2 16 0 44 242 -3 67 9 53 68 12 12 64 49 39 70 39 5 110 0 0 67 33 18 2 16 3 44 243 -2 67 2 7 68 4 41 64 41 23 70 32 9 111 0 0 67 25 20 2 16 6 43 244 -2 66 54 2 67 56 51 64 32 46 70 24 55 112 0 0 67 17 2 2 16 9 43 245 -2 66 45 37 67 48 41 64 23 48 70 17 22 113 0 0 67 8 24 2 16 12 43 247 -1 66 36 51 67 40 11 64 14 28 70 9 31 114 0 0 66 59 25 2 16 15 42 248 -1 66 27 44 67 31 20 64 4 46 70 1 21 115 0 0 66 50 6 2 16 18 42 249 -1 66 18 16 67 22 9 63 54 42 69 52 51 116 0 0 66 40 25 2 16 20 42 250 -1 66 8 27 67 12 36 63 44 16 69 44 1 117 0 0 66 30 22 2 16 23 41 251 0 65 58 15 67 2 42 63 33 26 69 34 51 Uncertainty in time = +/- 17 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 2519-01341-1 * constellation : Leo Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 58 41.6612 DE: +30 54 45.267 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .026, .033 ) * V mag [mag]: 11.0 * B mag [mag]: 11.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3540) Protesilaos approx. diameter [km]: 88 approx. diameter ["]: .027 distance from Earth [AU]: 4.46700 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 611 number of rejected observations: 8 time covered by the observations: 1953 Feb 14 - 2012 Apr 28 1 sigma uncertainty ellipse (major, minor, PA): 0.067, 0.043, 130° remarks: * orbital elements for (3540) Protesilaos : Mean anomaly = 357.25484882 deg Arg. of pericenter = 115.66895686 deg Long. of node = 26.43781310 deg Inclination = 23.31236995 deg Eccentricity = 0.11779464 Semimajor axis = 5.26360461 AU Perihelion dist = 4.64358018 AU Mag: H = 9.44, G = 0.15 Epoch of elements : MJD 56261.09200000 TDT (2012 Nov 30.092) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 30 3540 Protesilaos 2h 12.9m UT 11.0 10 58 41.661 30 54 45.27TYC 2519-01341-1 11.2 16.6 88 6.4 4.467 1.159 2.81 62.0856 30.912 143.95 -21.68 2.2151 -0.11037 0.58576 7.58167 1.42660 -0.00561 0.00236 2000 357.16572420121129.00000115.668957 26.437813 23.3123700.11779464 5.2636046 4.6435802 9.3 5.00.15 RATE 0.8161670 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.071 0.053 125 3.30 0.063 0 0 2-3 056247.0020121130_1341-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 03:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org