IOTA/IOTA-ES occultation update for (562) Salome / TYC 0631-00526-1 event on 2012 Dec 25, 15:37 UT Visible from SW Asia Summary ------- On 2012 Dec 25 UT, the 33 km diameter asteroid (562) Salome will occult a 12.8 mag star in the constellation Cetus for observers along a path across SW Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 15.0 mag (the magnitude of the asteroid) for at most 6.7 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 Dec 25, 15:25 - 2012 Dec 25, 15:55 UT * geocentric midpoint of event [JD]: 2456287.150275 * magnitude of target star: 12.8 * magnitude drop [mag]: 2.4 * estimated maximum duration [s]: 6.7 * Moon: 93 % sunlit, 28° distance * Sun: 122° distance * rough path description: SW Asia The occultation path -------------------- * approximate projected width [km]: 36 * 1 sigma uncertainty interval [path widths]: +/- 2.29 * 1 sigma uncertainty interval [seconds]: +/- 27.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .081) * 1 sigma uncertainty ellipse (major, minor, PA): ( .081", .045", 359° ) * approx speed of asteroid's shadow [km/s]: 4.9347 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0631-00526-1 by 562 Salome on 2012 Dec 25 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 50 32 12 -25 0 0 15 25 27 51 31 0 50 42 58 50 21 25 51 32 9 49 31 51 50 28 50 -24 0 0 15 25 45 52 32 -1 50 39 31 50 18 8 51 28 19 49 28 58 50 24 57 -23 0 0 15 26 4 53 32 -1 50 35 33 50 14 19 51 23 59 49 25 31 50 20 32 -22 0 0 15 26 24 53 33 -2 50 31 4 50 9 59 51 19 9 49 21 32 50 15 37 -21 0 0 15 26 43 54 34 -2 50 26 5 50 5 8 51 13 51 49 17 1 50 10 12 -20 0 0 15 27 3 55 35 -2 50 20 36 49 59 47 51 8 4 49 11 58 50 4 18 -19 0 0 15 27 23 56 35 -3 50 14 38 49 53 57 51 1 50 49 6 24 49 57 55 -18 0 0 15 27 43 57 36 -3 50 8 12 49 47 38 50 55 8 49 0 21 49 51 4 -17 0 0 15 28 3 57 37 -4 50 1 18 49 40 50 50 48 0 48 53 48 49 43 46 -16 0 0 15 28 24 58 38 -4 49 53 56 49 33 34 50 40 25 48 46 46 49 36 0 -15 0 0 15 28 44 59 39 -4 49 46 8 49 25 51 50 32 24 48 39 15 49 27 47 -14 0 0 15 29 5 60 41 -5 49 37 52 49 17 41 50 23 57 48 31 16 49 19 7 -13 0 0 15 29 26 60 42 -5 49 29 10 49 9 3 50 15 5 48 22 48 49 10 1 -12 0 0 15 29 47 61 43 -6 49 20 2 48 59 59 50 5 48 48 13 54 49 0 29 -11 0 0 15 30 8 62 44 -6 49 10 28 48 50 28 49 56 5 48 4 31 48 50 30 -10 0 0 15 30 30 62 46 -6 49 0 28 48 40 31 49 45 58 47 54 41 48 40 6 - 9 0 0 15 30 51 63 47 -7 48 50 2 48 30 8 49 35 26 47 44 24 48 29 15 - 8 0 0 15 31 13 64 49 -7 48 39 11 48 19 19 49 24 29 47 33 40 48 17 59 - 7 0 0 15 31 35 64 51 -7 48 27 53 48 8 4 49 13 8 47 22 29 48 6 17 - 6 0 0 15 31 57 65 52 -8 48 16 11 47 56 22 49 1 22 47 10 51 47 54 9 - 5 0 0 15 32 19 65 54 -8 48 4 2 47 44 15 48 49 11 46 58 46 47 41 35 - 4 0 0 15 32 41 66 56 -8 47 51 28 47 31 41 48 36 35 46 46 14 47 28 35 - 3 0 0 15 33 3 66 58 -9 47 38 28 47 18 41 48 23 34 46 33 14 47 15 8 - 2 0 0 15 33 25 67 60 -9 47 25 1 47 5 15 48 10 8 46 19 47 47 1 16 - 1 0 0 15 33 48 67 63 -9 47 11 9 46 51 22 47 56 17 46 5 52 46 46 56 0 0 0 15 34 10 67 65 -9 46 56 50 46 37 2 47 42 1 45 51 30 46 32 10 1 0 0 15 34 33 67 67 -10 46 42 4 46 22 14 47 27 18 45 36 39 46 16 56 2 0 0 15 34 55 68 69 -10 46 26 51 46 7 0 47 12 10 45 21 20 46 1 14 3 0 0 15 35 18 68 72 -10 46 11 11 45 51 17 46 56 35 45 5 32 45 45 5 4 0 0 15 35 41 68 74 -10 45 55 3 45 35 6 46 40 33 44 49 14 45 28 26 5 0 0 15 36 4 68 77 -11 45 38 26 45 18 26 46 24 3 44 32 27 45 11 19 6 0 0 15 36 26 68 79 -11 45 21 21 45 1 17 46 7 6 44 15 9 44 53 42 7 0 0 15 36 49 68 82 -11 45 3 45 44 43 38 45 49 40 43 57 20 44 35 34 8 0 0 15 37 12 68 84 -11 44 45 40 44 25 28 45 31 45 43 39 0 44 16 56 9 0 0 15 37 35 68 87 -11 44 27 4 44 6 47 45 13 20 43 20 6 43 57 45 10 0 0 15 37 58 68 89 -12 44 7 56 43 47 33 44 54 25 43 0 40 43 38 2 11 0 0 15 38 21 67 91 -12 43 48 16 43 27 47 44 34 59 42 40 39 43 17 45 12 0 0 15 38 44 67 94 -12 43 28 2 43 7 27 44 15 0 42 20 4 42 56 53 13 0 0 15 39 7 67 96 -12 43 7 14 42 46 31 43 54 28 41 58 52 42 35 26 14 0 0 15 39 30 66 98 -12 42 45 51 42 25 0 43 33 22 41 37 3 42 13 22 15 0 0 15 39 52 66 100 -12 42 23 51 42 2 52 43 11 41 41 14 35 41 50 40 16 0 0 15 40 15 65 102 -12 42 1 13 41 40 5 42 49 23 40 51 27 41 27 18 17 0 0 15 40 38 65 104 -12 41 37 56 41 16 38 42 26 27 40 27 38 41 3 15 18 0 0 15 41 1 64 106 -12 41 13 58 40 52 30 42 2 53 40 3 7 40 38 29 19 0 0 15 41 24 64 108 -13 40 49 18 40 27 40 41 38 37 39 37 50 40 13 0 20 0 0 15 41 46 63 109 -13 40 23 54 40 2 4 41 13 39 39 11 47 39 46 44 21 0 0 15 42 9 63 111 -13 39 57 44 39 35 42 40 47 58 38 44 56 39 19 40 22 0 0 15 42 32 62 112 -13 39 30 47 39 8 31 40 21 30 38 17 15 38 51 45 23 0 0 15 42 54 61 113 -13 39 2 59 38 40 29 39 54 14 37 48 40 38 22 58 24 0 0 15 43 16 60 115 -13 38 34 19 38 11 35 39 26 7 37 19 11 37 53 15 25 0 0 15 43 39 60 116 -13 38 4 45 37 41 44 38 57 8 36 48 43 37 22 34 26 0 0 15 44 1 59 117 -13 37 34 12 37 10 55 38 27 14 36 17 14 Latitude Latitude Latitude Latitude 36 0 0 28 32 17 15 44 57 57 119 -13 28 53 32 28 10 57 30 29 45 26 32 2 35 0 0 30 15 12 15 45 35 55 120 -13 30 35 43 29 54 36 32 8 43 28 19 11 34 0 0 31 52 10 15 46 10 54 121 -12 32 12 1 31 32 15 33 42 4 30 0 2 33 0 0 33 23 38 15 46 43 53 122 -12 33 42 52 33 4 20 35 10 10 31 35 4 32 0 0 34 50 0 15 47 13 51 123 -12 35 8 40 34 31 17 36 33 26 33 4 44 31 0 0 36 11 39 15 47 42 50 123 -12 36 29 47 35 53 27 37 52 10 34 29 26 30 0 0 37 28 52 15 48 9 48 123 -12 37 46 31 37 11 11 39 6 41 35 49 31 29 0 0 38 42 0 15 48 34 47 123 -11 38 59 10 38 24 46 40 17 16 37 5 17 28 0 0 39 51 17 15 48 58 46 123 -11 40 8 1 39 34 30 41 24 10 38 17 3 27 0 0 40 56 58 15 49 20 45 123 -11 41 13 18 40 40 36 42 27 37 39 25 5 26 0 0 41 59 18 15 49 41 44 123 -11 42 15 15 41 43 19 43 27 51 40 29 36 25 0 0 42 58 29 15 50 1 43 123 -10 43 14 4 42 42 51 44 25 2 41 30 51 24 0 0 43 54 41 15 50 20 42 123 -10 44 9 56 43 39 25 45 19 22 42 29 0 23 0 0 44 48 7 15 50 38 40 123 -10 45 3 3 44 33 10 46 11 1 43 24 16 22 0 0 45 38 56 15 50 54 39 122 -10 45 53 33 45 24 17 47 0 9 44 16 49 21 0 0 46 27 16 15 51 10 38 122 -9 46 41 36 46 12 55 47 46 54 45 6 47 20 0 0 47 13 17 15 51 25 38 121 -9 47 27 20 46 59 12 48 31 24 45 54 21 19 0 0 47 57 5 15 51 39 37 121 -9 48 10 53 47 43 16 49 13 46 46 39 38 18 0 0 48 38 49 15 51 53 36 120 -9 48 52 22 48 25 15 49 54 8 47 22 46 17 0 0 49 18 35 15 52 5 35 120 -8 49 31 54 49 5 14 50 32 37 48 3 51 16 0 0 49 56 29 15 52 18 34 119 -8 50 9 34 49 43 22 51 9 17 48 43 0 15 0 0 50 32 36 15 52 29 33 119 -8 50 45 29 50 19 42 51 44 14 49 20 19 14 0 0 51 7 3 15 52 40 32 118 -7 51 19 44 50 54 21 52 17 34 49 55 54 13 0 0 51 39 54 15 52 50 32 117 -7 51 52 23 51 27 23 52 49 22 50 29 50 12 0 0 52 11 14 15 53 0 31 117 -7 52 23 32 51 58 54 53 19 42 51 2 12 11 0 0 52 41 7 15 53 10 30 116 -7 52 53 15 52 28 58 53 48 37 51 33 3 10 0 0 53 9 37 15 53 19 29 116 -6 53 21 36 52 57 38 54 16 13 52 2 29 9 0 0 53 36 49 15 53 28 29 115 -6 53 48 38 53 24 59 54 42 32 52 30 34 8 0 0 54 2 44 15 53 36 28 114 -6 54 14 25 53 51 3 55 7 39 52 57 20 7 0 0 54 27 28 15 53 44 27 113 -6 54 39 0 54 15 56 55 31 35 53 22 52 6 0 0 54 51 3 15 53 51 27 113 -5 55 2 26 54 39 38 55 54 25 53 47 12 5 0 0 55 13 31 15 53 58 26 112 -5 55 24 47 55 2 14 56 16 10 54 10 24 4 0 0 55 34 56 15 54 5 25 111 -5 55 46 4 55 23 46 56 36 54 54 32 30 3 0 0 55 55 19 15 54 12 25 111 -5 56 6 21 55 44 17 56 56 39 54 53 33 2 0 0 56 14 44 15 54 18 24 110 -4 56 25 39 56 3 49 57 15 28 55 13 35 1 0 0 56 33 13 15 54 24 23 109 -4 56 44 1 56 22 23 57 33 21 55 32 39 0 0 0 56 50 46 15 54 30 23 108 -4 57 1 29 56 40 3 57 50 22 55 50 46 - 1 0 0 57 7 28 15 54 36 22 107 -4 57 18 4 56 56 50 58 6 32 56 7 59 - 2 0 0 57 23 18 15 54 41 22 107 -3 57 33 50 57 12 46 58 21 52 56 24 20 - 3 0 0 57 38 19 15 54 46 21 106 -3 57 48 46 57 27 52 58 36 25 56 39 50 - 4 0 0 57 52 33 15 54 51 20 105 -3 58 2 54 57 42 10 58 50 12 56 54 30 - 5 0 0 58 6 0 15 54 56 20 104 -3 58 16 17 57 55 42 59 3 15 57 8 23 - 6 0 0 58 18 43 15 55 1 19 104 -2 58 28 56 58 8 29 59 15 34 57 21 30 - 7 0 0 58 30 42 15 55 5 19 103 -2 58 40 51 58 20 33 59 27 11 57 33 52 - 8 0 0 58 41 59 15 55 9 18 102 -2 58 52 4 58 31 53 59 38 6 57 45 30 - 9 0 0 58 52 34 15 55 13 18 101 -2 59 2 36 58 42 32 59 48 22 57 56 25 - 10 0 0 59 2 30 15 55 17 17 100 -2 59 12 28 58 52 31 59 57 59 58 6 39 - 11 0 0 59 11 45 15 55 21 17 99 -1 59 21 41 59 1 50 60 6 58 58 16 12 - 12 0 0 59 20 23 15 55 24 16 99 -1 59 30 15 59 10 30 60 15 20 58 25 5 - 13 0 0 59 28 23 15 55 28 16 98 -1 59 38 12 59 18 32 60 23 5 58 33 20 - 14 0 0 59 35 45 15 55 31 15 97 -1 59 45 33 59 25 57 60 30 14 58 40 56 - 15 0 0 59 42 32 15 55 34 15 96 0 59 52 17 59 32 46 60 36 48 58 47 55 - 16 0 0 59 48 42 15 55 38 14 95 0 59 58 26 59 38 59 60 42 48 58 54 17 Uncertainty in time = +/- 27 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: TYC 0631-00526-1 * constellation : Cetus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 22 08.2156 DE: +09 27 16.095 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .040, .080 ) * V mag [mag]: 12.8 * B mag [mag]: 13.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (562) Salome approx. diameter [km]: 33 approx. diameter ["]: .020 distance from Earth [AU]: 2.29500 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1023 number of rejected observations: 60 time covered by the observations: 1905 Apr 04 - 2012 Dec 04 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.014, 61° remarks: * orbital elements for (562) Salome : Mean anomaly = 68.12108162 deg Arg. of pericenter = 263.00360508 deg Long. of node = 70.75246834 deg Inclination = 11.12764653 deg Eccentricity = 0.09615676 Semimajor axis = 3.02238869 AU Perihelion dist = 2.73176560 AU Mag: H = 9.88, G = 0.15 Epoch of elements : MJD 56286.65100000 TDT (2012 Dec 25.651) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 25 562 Salome 15h 36.4m UT 12.8 2 22 8.216 9 27 16.09TYC 0631-00526-1 13.2 15.0 33 6.7 2.295 -0.099 10.57 66.8832 9.451 -54.00 -23.37 15.6066 -0.37008 -0.05225 -0.38670 2.75828 0.00470 0.00187 2000 66.87351020121219.00000263.003605 70.752468 11.1276470.09615676 3.0223887 2.731765610.0 5.00.15 RATE 1.8757660 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.081 0.045 359 3.29 0.045 0 0-4 5 056278.0020121225_0526-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org