IOTA/IOTA-ES occultation update for (3447) Burckhalter / HIP 20103 event on 2008 Feb 02, 04:46 UT Visible from Europe, Scandanavia, Canada, USA, Caribbean, Colombia Summary ------- On 2008 Feb 02 UT, the 10 km diameter asteroid (3447) Burckhalter will occult a 8.3 mag star in the constellation Camelopardalis for observers along a path across Europe, Scandanavia, Canada, USA, Caribbean, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.9 mag to 15.2 mag (the magnitude of the asteroid) for at most 1.0 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: 10 * date and approx. time of event: 2008 Feb 02, 04:38 - 2008 Feb 02, 04:54 UT * midpoint of event [JD]: 2454498.69897083 * magnitude of target star: 8.3 * magnitude drop [mag]: 6.9 * estimated maximum duration [s]: 1.0 * Moon: 23 % sunlit, 154° distance * Sun: 115° distance * rough path description: Europe, Scandanavia, Canada, USA, Caribbean, Colombia The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 6.67 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .066 +/- .069) * 1 sigma uncertainty ellipse (major, minor, PA): ( .069", .066", 163° ) * approx speed of asteroid's shadow [km/s]: 10.1177 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 20103 by 3447 Burckhalter on 2008 Feb 02 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. 31 8 40 42 20 12 28 54 38 45 0 46 4 38 52 9 351 -8 28 54 26 44 48 32 28 54 53 45 12 43 29 0 32 41 23 9 29 2 54 47 32 39 26 49 1 49 0 12 4 39 4 13 350 -11 26 48 17 48 51 42 26 49 47 49 8 37 26 41 29 46 48 1 27 2 30 50 53 23 24 43 35 51 54 29 4 39 16 16 349 -13 24 42 42 51 47 26 24 44 30 52 1 28 24 32 55 50 8 9 24 58 34 53 30 30 22 33 47 54 15 37 4 39 28 18 347 -14 22 32 52 54 9 23 22 34 43 54 21 50 22 22 27 52 42 46 22 48 43 55 41 39 20 17 56 56 15 7 4 39 39 21 346 -16 20 17 5 56 9 24 20 18 48 56 20 49 20 7 14 54 50 40 20 31 49 57 34 31 17 55 10 57 58 34 4 39 51 23 344 -17 17 54 26 57 53 13 17 55 54 58 3 54 17 46 2 56 39 56 18 7 11 59 13 15 15 25 1 59 29 10 4 40 3 24 342 -19 15 24 27 59 24 6 15 25 35 59 34 14 15 18 12 58 14 48 15 34 26 60 40 19 12 47 15 60 48 54 4 40 15 26 340 -20 12 46 55 60 44 2 12 47 36 60 53 45 12 43 29 59 37 49 12 53 22 61 57 15 10 1 53 61 59 2 4 40 26 28 338 -21 10 1 49 61 54 21 10 1 58 62 3 43 10 1 48 60 50 37 10 4 0 63 5 9 7 9 7 63 0 30 4 40 38 29 336 -22 7 9 21 62 55 57 7 8 53 63 5 2 7 13 21 61 54 17 7 6 35 64 4 41 4 9 23 63 53 54 4 40 50 30 334 -24 4 9 59 63 49 29 4 8 48 63 58 19 4 18 30 62 49 36 4 1 36 64 56 25 1 3 21 64 39 43 4 41 2 32 332 -25 1 4 20 64 35 24 1 2 22 64 44 1 1 17 51 63 37 8 0 49 45 65 40 41 - 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74 59 27 26 17 21 - 73 56 5 25 49 6 - 75 54 0 26 40 35 - 74 53 48 24 52 5 4 51 37 34 319 -81 - 74 49 41 24 50 14 - 74 57 55 24 53 56 - 73 54 28 24 24 48 - 75 52 27 25 17 51 - 74 50 10 23 26 19 4 51 49 33 319 -82 - 74 46 2 23 24 24 - 74 54 17 23 28 13 - 73 50 40 22 58 5 - 75 48 55 23 52 56 - 74 44 19 21 57 58 4 52 0 32 320 -83 - 74 40 10 21 55 59 - 74 48 27 21 59 57 - 73 44 30 21 28 37 - 75 43 17 22 25 36 - 74 36 4 20 26 43 4 52 12 31 320 -84 - 74 31 53 20 24 39 - 74 40 14 20 28 47 - 73 35 48 19 56 3 - 75 35 23 20 55 32 - 74 25 10 18 52 9 4 52 24 29 321 -85 - 74 20 58 18 49 58 - 74 29 23 18 54 19 - 73 24 15 18 19 55 - 75 25 1 19 22 22 - 74 11 20 17 13 45 4 52 36 28 321 -86 - 74 7 4 17 11 27 - 74 15 36 17 16 3 - 73 9 32 16 39 37 - 75 11 54 17 45 38 - 73 54 9 15 30 51 4 52 48 26 322 -86 - 73 49 48 15 28 23 - 73 58 29 15 33 17 - 72 51 9 14 54 24 - 74 55 41 16 4 46 - 73 33 2 13 42 33 4 52 59 25 322 -85 - 73 28 35 13 39 55 - 73 37 28 13 45 11 - 72 28 25 13 3 14 - 74 35 54 14 18 59 - 73 7 12 11 47 40 4 53 11 23 323 -84 - 73 2 37 11 44 47 - 73 11 46 11 50 32 - 72 0 23 11 4 38 - 74 11 53 12 27 15 - 72 35 29 9 44 27 4 53 23 21 323 -82 - 72 30 42 9 41 15 - 72 40 15 9 47 38 - 71 25 33 8 56 27 - 73 42 40 10 28 9 - 71 56 3 7 30 12 4 53 35 19 324 -80 - 71 50 59 7 26 34 - 72 1 6 7 33 48 - 70 41 33 6 35 12 - 73 6 50 8 19 32 - 71 5 46 5 0 23 4 53 46 16 324 -78 - 71 0 16 4 56 5 - 71 11 15 5 4 39 - 69 43 54 3 54 31 - 72 22 2 5 58 0 - 69 58 23 2 6 7 4 53 58 13 324 -75 - 69 52 5 2 0 41 - 70 4 38 2 11 30 - 68 22 33 0 40 13 - 71 24 1 3 17 25 - 68 17 12 - 1 36 4 4 54 10 9 324 -71 - 68 8 58 - 1 44 14 - 68 25 18 - 1 28 4 - 65 59 8 - 4 0 57 - 70 3 20 0 4 22 ... .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. - 67 46 25 - 4 28 7 Data for the target star ------------------------ * name: HIP 20103 * constellation : Camelopardalis * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 18 34.3614 DE: +52 58 26.882 * position source: mpos:HIP pm:HIP plx:HIP * standard error: RA,DE ["]: ( .023, .019 ) * V mag [mag]: 8.3 * B mag [mag]: 9.6 * Apparent position with proper motion RA(deg): 64.8073835708 DE(deg): 52.9988592700 * Equation of equinoxes (radians) : 0.000044705417002 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3447) Burckhalter approx. diameter [km]: 10 approx. diameter ["]: .010 distance from Earth [AU]: 1.33100 * orbital information: orbit source: Preston date of fit: 2007 Dec 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 451 number of rejected observations: 21 time covered by the observations: 1942 Sep 08 - 2007 Dec 18 1 sigma uncertainty ellipse (major, minor, PA): 0.067, 0.062, 162° remarks: * orbital elements for (3447) Burckhalter : Mean anomaly = 298.02969140 deg Arg. of pericenter = 163.68873507 deg Long. of node = 0.76266481 deg Inclination = 20.71088774 deg Eccentricity = 0.02868828 Semimajor axis = 1.99096334 AU Perihelion dist = 1.93384603 AU Mag: H = 11.97, G = 0.15 Epoch of elements : MJD 54498.19900000 TDT (2008 Feb 02.199) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Feb 02 3447 Burckhalter 4h 46.5m UT 8.3 4 18 34.361 52 58 26.88HIP 20103 9.6 15.2 10 1.0 1.331 2.228 -31.92 -138.753 52.984 111.78 -16.99 4.7753 .56401 .35538 3.04276 -4.83255 0.00489 -0.00044 2000 295.1531532008 125.00000163.688735 0.762665 20.7108880.028688281.990963341.9338460311.95 0.15 RATE 3.5084000 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.069 0.066 163.3 7.670 0.067 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Dec 22, 20:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org