IOTA/IOTA-ES occultation update for (2979) Murmansk / HIP 31448 event on 2012 Dec 17, 04:07 UT Visible from Argentina, Chile Summary ------- On 2012 Dec 17 UT, the 22 km diameter asteroid (2979) Murmansk will occult a 5.9 mag star in the constellation Monoceros for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 11.2 mag to 17.1 mag (the magnitude of the asteroid) for at most 1.9 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: . The event at a glimpse ---------------------- * Rank: 17 * date and approx. time of event: 2012 Dec 17, 04:04 - 2012 Dec 17, 04:11 UT * geocentric midpoint of event [JD]: 2456278.67175417 * magnitude of target star: 5.9 * magnitude drop [mag]: 11.2 * estimated maximum duration [s]: 1.9 * Moon: 19 % sunlit, 141° distance * Sun: 161° distance * rough path description: Argentina, Chile Additional comments ------------------- possible double star The occultation path -------------------- * approximate projected width [km]: 48 * 1 sigma uncertainty interval [path widths]: +/- 4.04 * 1 sigma uncertainty interval [seconds]: +/- 9.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .085 +/- .060) * 1 sigma uncertainty ellipse (major, minor, PA): ( .085", .059", 85° ) * approx speed of asteroid's shadow [km/s]: 13.6246 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 31448 by 2979 Murmansk on 2012 Dec 17 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 Latitude Latitude Latitude Latitude - 14 0 0 -56 38 8 4 4 6 18 324 -1 -56 23 56 -56 52 25 -54 32 21 -58 52 48 - 15 0 0 -56 24 46 4 4 9 18 325 -1 -56 10 36 -56 39 3 -54 19 8 -58 39 16 - 16 0 0 -56 11 27 4 4 12 19 326 -2 -55 57 18 -56 25 43 -54 5 58 -58 25 46 - 17 0 0 -55 58 10 4 4 15 19 327 -2 -55 44 2 -56 12 25 -53 52 51 -58 12 18 - 18 0 0 -55 44 57 4 4 18 20 328 -3 -55 30 50 -55 59 10 -53 39 47 -57 58 52 - 19 0 0 -55 31 46 4 4 21 20 329 -3 -55 17 40 -55 45 58 -53 26 46 -57 45 30 - 20 0 0 -55 18 40 4 4 25 21 330 -4 -55 4 35 -55 32 50 -53 13 49 -57 32 11 - 21 0 0 -55 5 37 4 4 28 21 331 -4 -54 51 33 -55 19 46 -53 0 57 -57 18 56 - 22 0 0 -54 52 38 4 4 32 22 332 -5 -54 38 36 -55 6 47 -52 48 9 -57 5 45 - 23 0 0 -54 39 45 4 4 35 22 333 -5 -54 25 44 -54 53 52 -52 35 25 -56 52 38 - 24 0 0 -54 26 56 4 4 39 22 334 -6 -54 12 56 -54 41 2 -52 22 47 -56 39 37 - 25 0 0 -54 14 12 4 4 43 23 335 -6 -54 0 14 -54 28 17 -52 10 15 -56 26 40 - 26 0 0 -54 1 35 4 4 46 23 336 -7 -53 47 38 -54 15 38 -51 57 48 -56 13 49 - 27 0 0 -53 49 3 4 4 50 24 337 -7 -53 35 7 -54 3 5 -51 45 27 -56 1 4 - 28 0 0 -53 36 38 4 4 54 24 338 -8 -53 22 43 -53 50 38 -51 33 13 -55 48 25 - 29 0 0 -53 24 19 4 4 58 25 339 -8 -53 10 26 -53 38 18 -51 21 5 -55 35 53 - 30 0 0 -53 12 8 4 5 2 25 340 -9 -52 58 16 -53 26 5 -51 9 5 -55 23 28 - 31 0 0 -53 0 3 4 5 7 25 341 -9 -52 46 13 -53 14 0 -50 57 12 -55 11 10 - 32 0 0 -52 48 7 4 5 11 26 342 -10 -52 34 18 -53 2 2 -50 45 27 -54 59 0 - 33 0 0 -52 36 18 4 5 15 26 343 -10 -52 22 30 -52 50 12 -50 33 50 -54 46 58 - 34 0 0 -52 24 38 4 5 20 27 344 -10 -52 10 51 -52 38 30 -50 22 21 -54 35 4 - 35 0 0 -52 13 6 4 5 24 27 345 -11 -51 59 21 -52 26 57 -50 11 0 -54 23 18 - 36 0 0 -52 1 43 4 5 29 27 346 -11 -51 48 0 -52 15 33 -49 59 49 -54 11 42 - 37 0 0 -51 50 30 4 5 33 28 347 -12 -51 36 47 -52 4 18 -49 48 46 -54 0 15 - 38 0 0 -51 39 26 4 5 38 28 348 -12 -51 25 45 -51 53 13 -49 37 53 -53 48 57 - 39 0 0 -51 28 31 4 5 43 28 349 -13 -51 14 52 -51 42 17 -49 27 10 -53 37 50 - 40 0 0 -51 17 47 4 5 48 28 350 -13 -51 4 9 -51 31 31 -49 16 37 -53 26 52 - 41 0 0 -51 7 13 4 5 53 29 351 -13 -50 53 36 -51 20 56 -49 6 14 -53 16 5 - 42 0 0 -50 56 50 4 5 57 29 352 -14 -50 43 14 -51 10 32 -48 56 2 -53 5 29 - 43 0 0 -50 46 38 4 6 2 29 354 -14 -50 33 3 -51 0 18 -48 46 0 -52 55 3 - 44 0 0 -50 36 36 4 6 7 29 355 -14 -50 23 3 -50 50 15 -48 36 9 -52 44 49 - 45 0 0 -50 26 47 4 6 12 30 356 -15 -50 13 14 -50 40 24 -48 26 30 -52 34 47 - 46 0 0 -50 17 8 4 6 18 30 357 -15 -50 3 37 -50 30 45 -48 17 2 -52 24 56 - 47 0 0 -50 7 42 4 6 23 30 358 -15 -49 54 12 -50 21 17 -48 7 46 -52 15 18 - 48 0 0 -49 58 28 4 6 28 30 359 -16 -49 44 59 -50 12 2 -47 58 42 -52 5 51 - 49 0 0 -49 49 26 4 6 33 30 0 -16 -49 35 59 -50 2 59 -47 49 50 -51 56 38 - 50 0 0 -49 40 37 4 6 38 30 1 -16 -49 27 11 -49 54 9 -47 41 10 -51 47 37 - 51 0 0 -49 32 1 4 6 43 31 2 -17 -49 18 35 -49 45 31 -47 32 43 -51 38 49 - 52 0 0 -49 23 37 4 6 49 31 4 -17 -49 10 13 -49 37 7 -47 24 29 -51 30 15 - 53 0 0 -49 15 27 4 6 54 31 5 -17 -49 2 4 -49 28 55 -47 16 28 -51 21 54 - 54 0 0 -49 7 30 4 6 59 31 6 -17 -48 54 8 -49 20 58 -47 8 40 -51 13 47 - 55 0 0 -48 59 47 4 7 5 31 7 -17 -48 46 26 -49 13 14 -47 1 5 -51 5 54 - 56 0 0 -48 52 18 4 7 10 31 8 -18 -48 38 58 -49 5 43 -46 53 44 -50 58 14 - 57 0 0 -48 45 3 4 7 15 31 9 -18 -48 31 44 -48 58 27 -46 46 37 -50 50 49 - 58 0 0 -48 38 2 4 7 21 31 10 -18 -48 24 44 -48 51 25 -46 39 44 -50 43 39 - 59 0 0 -48 31 15 4 7 26 31 11 -18 -48 17 58 -48 44 38 -46 33 5 -50 36 43 - 60 0 0 -48 24 43 4 7 31 31 13 -18 -48 11 27 -48 38 5 -46 26 40 -50 30 3 - 61 0 0 -48 18 26 4 7 37 31 14 -18 -48 5 10 -48 31 46 -46 20 30 -50 23 37 - 62 0 0 -48 12 23 4 7 42 31 15 -19 -47 59 8 -48 25 43 -46 14 34 -50 17 26 - 63 0 0 -48 6 36 4 7 48 31 16 -19 -47 53 22 -48 19 55 -46 8 53 -50 11 31 - 64 0 0 -48 1 3 4 7 53 31 17 -19 -47 47 50 -48 14 22 -46 3 27 -50 5 51 - 65 0 0 -47 55 46 4 7 58 31 18 -19 -47 42 34 -48 9 4 -45 58 15 -50 0 27 - 66 0 0 -47 50 44 4 8 4 30 19 -19 -47 37 32 -48 4 1 -45 53 19 -49 55 19 - 67 0 0 -47 45 58 4 8 9 30 20 -19 -47 32 47 -47 59 15 -45 48 38 -49 50 26 - 68 0 0 -47 41 28 4 8 14 30 22 -19 -47 28 17 -47 54 44 -45 44 13 -49 45 50 - 69 0 0 -47 37 13 4 8 20 30 23 -19 -47 24 3 -47 50 28 -45 40 3 -49 41 30 - 70 0 0 -47 33 14 4 8 25 30 24 -19 -47 20 5 -47 46 29 -45 36 8 -49 37 26 - 71 0 0 -47 29 31 4 8 30 29 25 -19 -47 16 22 -47 42 46 -45 32 29 -49 33 38 - 72 0 0 -47 26 5 4 8 35 29 26 -19 -47 12 56 -47 39 18 -45 29 6 -49 30 7 - 73 0 0 -47 22 54 4 8 40 29 27 -19 -47 9 46 -47 36 7 -45 25 59 -49 26 52 - 74 0 0 -47 20 0 4 8 45 29 28 -19 -47 6 52 -47 33 13 -45 23 8 -49 23 54 - 75 0 0 -47 17 22 4 8 50 28 29 -19 -47 4 14 -47 30 34 -45 20 32 -49 21 13 - 76 0 0 -47 15 0 4 8 55 28 30 -19 -47 1 53 -47 28 13 -45 18 13 -49 18 48 - 77 0 0 -47 12 55 4 9 0 28 31 -18 -46 59 48 -47 26 7 -45 16 10 -49 16 41 - 78 0 0 -47 11 6 4 9 5 28 32 -18 -46 57 59 -47 24 18 -45 14 23 -49 14 50 - 79 0 0 -47 9 34 4 9 10 27 33 -18 -46 56 28 -47 22 46 -45 12 52 -49 13 17 - 80 0 0 -47 8 19 4 9 15 27 34 -18 -46 55 12 -47 21 31 -45 11 38 -49 12 0 - 81 0 0 -47 7 20 4 9 20 27 35 -18 -46 54 14 -47 20 32 -45 10 40 -49 11 0 - 82 0 0 -47 6 38 4 9 25 26 36 -18 -46 53 32 -47 19 50 -45 9 58 -49 10 18 - 83 0 0 -47 6 13 4 9 29 26 37 -17 -46 53 7 -47 19 25 -45 9 33 -49 9 53 - 84 0 0 -47 6 5 4 9 34 25 38 -17 -46 52 58 -47 19 16 -45 9 24 -49 9 45 - 85 0 0 -47 6 13 4 9 38 25 39 -17 -46 53 6 -47 19 25 -45 9 32 -49 9 54 - 86 0 0 -47 6 38 4 9 43 24 40 -17 -46 53 31 -47 19 50 -45 9 56 -49 10 20 - 87 0 0 -47 7 20 4 9 47 24 41 -17 -46 54 13 -47 20 32 -45 10 37 -49 11 4 - 88 0 0 -47 8 19 4 9 51 24 42 -16 -46 55 12 -47 21 31 -45 11 34 -49 12 4 - 89 0 0 -47 9 34 4 9 56 23 43 -16 -46 56 27 -47 22 47 -45 12 47 -49 13 22 - 90 0 0 -47 11 6 4 10 0 23 44 -16 -46 57 59 -47 24 19 -45 14 17 -49 14 57 - 91 0 0 -47 12 56 4 10 4 22 45 -15 -46 59 48 -47 26 9 -45 16 3 -49 16 50 - 92 0 0 -47 15 1 4 10 8 22 46 -15 -47 1 53 -47 28 15 -45 18 6 -49 18 59 - 93 0 0 -47 17 24 4 10 12 21 46 -15 -47 4 15 -47 30 38 -45 20 25 -49 21 26 - 94 0 0 -47 20 3 4 10 15 21 47 -14 -47 6 54 -47 33 17 -45 23 1 -49 24 9 - 95 0 0 -47 22 59 4 10 19 20 48 -14 -47 9 49 -47 36 13 -45 25 52 -49 27 10 - 96 0 0 -47 26 11 4 10 23 20 49 -14 -47 13 1 -47 39 26 -45 29 0 -49 30 27 - 97 0 0 -47 29 40 4 10 26 19 50 -13 -47 16 29 -47 42 56 -45 32 24 -49 34 1 - 98 0 0 -47 33 25 4 10 30 18 51 -13 -47 20 14 -47 46 42 -45 36 5 -49 37 53 - 99 0 0 -47 37 27 4 10 33 18 52 -12 -47 24 15 -47 50 44 -45 40 1 -49 42 1 -100 0 0 -47 41 45 4 10 36 17 52 -12 -47 28 32 -47 55 2 -45 44 13 -49 46 25 -101 0 0 -47 46 19 4 10 39 17 53 -11 -47 33 5 -47 59 37 -45 48 41 -49 51 6 -102 0 0 -47 51 9 4 10 42 16 54 -11 -47 37 55 -48 4 28 -45 53 25 -49 56 4 -103 0 0 -47 56 15 4 10 45 16 55 -11 -47 43 0 -48 9 35 -45 58 25 -50 1 18 -104 0 0 -48 1 37 4 10 48 15 56 -10 -47 48 22 -48 14 58 -46 3 40 -50 6 48 -105 0 0 -48 7 15 4 10 51 14 57 -10 -47 53 59 -48 20 37 -46 9 11 -50 12 35 -106 0 0 -48 13 9 4 10 53 14 57 -9 -47 59 52 -48 26 31 -46 14 57 -50 18 37 -107 0 0 -48 19 18 4 10 56 13 58 -9 -48 6 0 -48 32 41 -46 20 59 -50 24 55 -108 0 0 -48 25 42 4 10 58 13 59 -8 -48 12 23 -48 39 7 -46 27 15 -50 31 29 -109 0 0 -48 32 22 4 11 0 12 60 -8 -48 19 2 -48 45 48 -46 33 47 -50 38 19 -110 0 0 -48 39 17 4 11 2 11 61 -7 -48 25 56 -48 52 44 -46 40 33 -50 45 24 -111 0 0 -48 46 27 4 11 4 11 61 -7 -48 33 5 -48 59 54 -46 47 34 -50 52 44 -112 0 0 -48 53 52 4 11 6 10 62 -6 -48 40 28 -49 7 20 -46 54 50 -51 0 19 -113 0 0 -49 1 31 4 11 8 9 63 -5 -48 48 6 -49 15 0 -47 2 20 -51 8 9 -114 0 0 -49 9 24 4 11 10 9 64 -5 -48 55 59 -49 22 55 -47 10 4 -51 16 14 -115 0 0 -49 17 32 4 11 11 8 64 -4 -49 4 6 -49 31 4 -47 18 2 -51 24 34 -116 0 0 -49 25 54 4 11 13 7 65 -4 -49 12 26 -49 39 27 .. .. .. -51 33 7 -117 0 0 -49 34 30 4 11 14 7 66 -3 -49 21 1 -49 48 4 .. .. .. -51 41 55 -118 0 0 -49 43 19 4 11 15 6 67 -3 -49 29 49 -49 56 55 .. .. .. -51 50 57 -119 0 0 -49 52 22 4 11 16 6 68 -2 -49 38 50 -50 5 59 .. .. .. -52 0 12 -120 0 0 -50 1 38 4 11 17 5 68 -1 -49 48 5 -50 15 16 .. .. .. -52 9 40 -121 0 0 -50 11 7 4 11 18 4 69 -1 -49 57 33 -50 24 46 .. .. .. -52 19 22 -122 0 0 -50 20 48 4 11 19 4 70 0 -50 7 13 -50 34 29 .. .. .. -52 29 17 Uncertainty in time = +/- 10 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: HIP 31448 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 35 17.5971 DE: +09 59 17.920 * position source: mpos:FK6 LTP pm:FK6 LTP plx:FK6 vrad:FK6 * standard error: RA,DE ["]: ( .017, .020 ) * V mag [mag]: 5.9 * B mag [mag]: 7.5 * Diameter [mas]: 2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2979) Murmansk approx. diameter [km]: 22 approx. diameter ["]: .013 distance from Earth [AU]: 2.25900 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: MPC (via Astdys) number of used observations: 836 number of rejected observations: 17 time covered by the observations: 1976 Apr 23 - 2012 Feb 12 1 sigma uncertainty ellipse (major, minor, PA): 0.083, 0.056, 85° remarks: * orbital elements for (2979) Murmansk : Mean anomaly = 90.57367248 deg Arg. of pericenter = 197.56588397 deg Long. of node = 148.56245219 deg Inclination = 11.40275761 deg Eccentricity = 0.15567459 Semimajor axis = 3.12666396 AU Perihelion dist = 2.63992183 AU Mag: H = 12.27, G = 0.15 Epoch of elements : MJD 56278.17200000 TDT (2012 Dec 17.172) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 17 2979 Murmansk 4h 7.3m UT 5.9 6 35 17.597 9 59 17.92HIP 31448 7.5 17.1 25 1.9 2.259 -2.013 3.54 -49.2036 9.986 117.21 -23.36 4.1221 -0.10085 -0.84918 -7.63650 0.90662 -0.00130 0.00143 2000 89.116836201212 9.00000197.565884148.562452 11.4027580.15567459 3.1266640 2.639921812.3 5.00.15 RATE 1.7827170 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.085 0.059 85 5.06 0.062 0 2 1 0 056264.0020121217__31448 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 05:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org