IOTA/IOTA-ES occultation update for (2294) Andronikov / TYC 1884-01443-1 event on 2008 Jan 07, 20:15 UT Visible from China, Arabia, Africa Summary ------- On 2008 Jan 07 UT, the 17 km diameter asteroid (2294) Andronikov will occult a 10.1 mag star in the constellation Gemini for observers along a path across China, Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 15.2 mag (the magnitude of the asteroid) for at most 1.3 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: 16 * date and approx. time of event: 2008 Jan 07, 20:07 - 2008 Jan 07, 20:23 UT * magnitude of target star: 10.1 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 1.3 * Moon: 1 % sunlit, 178° distance * Sun: 172° distance * rough path description: China, Arabia, Africa The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 4.12 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .066 +/- .053) * 1 sigma uncertainty ellipse (major, minor, PA): ( .067", .053", 99° ) * approx speed of asteroid's shadow [km/s]: 12.8471 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1884-01443-1 by 2294 Andronikov on 2008 Jan 07 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 - 43 0 0 1 13 12 20 23 37 0 65 8 1 18 18 1 8 6 2 0 24 .. .. .. - 42 0 0 1 41 9 20 23 37 2 65 6 1 46 16 1 36 3 2 28 23 .. .. .. - 41 0 0 2 9 12 20 23 37 3 65 5 2 14 19 2 4 5 2 56 27 1 22 1 - 40 0 0 2 37 19 20 23 36 4 65 4 2 42 26 2 32 12 3 24 35 1 50 7 - 39 0 0 3 5 30 20 23 35 5 65 3 3 10 37 3 0 23 3 52 47 2 18 17 - 38 0 0 3 33 44 20 23 35 6 65 2 3 38 51 3 28 37 4 21 2 2 46 30 - 37 0 0 4 2 0 20 23 33 7 66 1 4 7 7 3 56 53 4 49 20 3 14 45 - 36 0 0 4 30 18 20 23 32 8 66 0 4 35 25 4 25 11 5 17 38 3 43 2 - 35 0 0 4 58 37 20 23 31 9 66 -1 5 3 44 4 53 30 5 45 57 4 11 20 - 34 0 0 5 26 56 20 23 29 10 66 -2 5 32 3 5 21 48 6 14 16 4 39 39 - 33 0 0 5 55 14 20 23 27 11 66 -3 6 0 21 5 50 6 6 42 34 5 7 57 - 32 0 0 6 23 30 20 23 25 13 66 -5 6 28 38 6 18 23 7 10 51 5 36 14 - 31 0 0 6 51 45 20 23 23 14 66 -6 6 56 52 6 46 38 7 39 5 6 4 28 - 30 0 0 7 19 57 20 23 21 15 66 -7 7 25 4 7 14 50 8 7 17 6 32 41 - 29 0 0 7 48 5 20 23 18 16 66 -8 7 53 12 7 42 58 8 35 24 7 0 50 - 28 0 0 8 16 9 20 23 16 17 67 -9 8 21 16 8 11 2 9 3 28 7 28 55 - 27 0 0 8 44 8 20 23 13 18 67 -10 8 49 15 8 39 1 9 31 26 7 56 55 - 26 0 0 9 12 2 20 23 10 19 67 -11 9 17 8 9 6 55 9 59 18 8 24 49 - 25 0 0 9 39 49 20 23 7 20 67 -12 9 44 55 9 34 42 10 27 4 8 52 38 - 24 0 0 10 7 29 20 23 3 21 67 -13 10 12 35 10 2 23 10 54 43 9 20 19 - 23 0 0 10 35 2 20 23 0 22 67 -14 10 40 8 10 29 55 11 22 13 9 47 54 - 22 0 0 11 2 26 20 22 56 23 68 -15 11 7 32 10 57 20 11 49 36 10 15 20 - 21 0 0 11 29 41 20 22 53 24 68 -16 11 34 47 11 24 35 12 16 49 10 42 37 - 20 0 0 11 56 47 20 22 49 25 68 -17 12 1 53 11 51 42 12 43 53 11 9 45 - 19 0 0 12 23 43 20 22 45 26 68 -18 12 28 48 12 18 38 13 10 46 11 36 43 - 18 0 0 12 50 28 20 22 40 28 69 -20 12 55 33 12 45 23 13 37 29 12 3 31 - 17 0 0 13 17 2 20 22 36 29 69 -21 13 22 7 13 11 57 14 4 0 12 30 7 - 16 0 0 13 43 24 20 22 32 30 69 -22 13 48 28 13 38 19 14 30 20 12 56 32 - 15 0 0 14 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20 7 12 4 294 -12 12 14 51 12 4 38 12 56 56 11 22 37 143 0 0 11 42 20 20 7 11 3 295 -11 11 47 27 11 37 14 12 29 34 10 55 11 144 0 0 11 14 46 20 7 11 2 295 -9 11 19 53 11 9 39 12 2 2 10 27 34 145 0 0 10 47 2 20 7 10 1 295 -8 10 52 9 10 41 55 11 34 20 .. .. .. 146 0 0 .. .. .. .. .. .. .. .. .. 10 24 16 .. .. .. 11 6 28 .. .. .. Data for the target star ------------------------ * name: TYC 1884-01443-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 38 27.1048 DE: +24 46 07.565 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .017 ) * V mag [mag]: 10.1 * B mag [mag]: 10.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2294) Andronikov approx. diameter [km]: 17 approx. diameter ["]: .013 distance from Earth [AU]: 1.76300 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 872 number of rejected observations: 25 time covered by the observations: 1944 Sep 15 - 2007 Dec 14 1 sigma uncertainty ellipse (major, minor, PA): 0.065, 0.050, 99° remarks: * orbital elements for (2294) Andronikov : Mean anomaly = 115.72395821 deg Arg. of pericenter = 43.42684363 deg Long. of node = 291.10041339 deg Inclination = 6.29914231 deg Eccentricity = 0.11727166 Semimajor axis = 2.58227608 AU Perihelion dist = 2.27944829 AU Mag: H = 11.56, G = 0.15 Epoch of elements : MJD 54472.84400000 TDT (2008 Jan 07.844) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 07 2294 Andronikov 20h 15.4m UT 10.1 6 38 27.105 24 46 7.57TYC 1884-01443-1 10.5 15.2 17 1.3 1.763 -2.644 -3.21 48.988 24.770 237.70 -22.37 20.2566 -.00979 .10791 -7.22261 -0.64400 0.00082 -0.00022 2000 115.0484512008 1 5.00000 43.426844291.100413 6.2991420.117271662.582276082.2794482911.55 0.15 RATE 2.3751990 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.067 0.053 98.5 5.120 0.055 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org