IOTA/IOTA-ES occultation update for (16) Psyche / TYC 6349-00594-1 event on 2009 Nov 03, 23:01 UT Visible from Summary ------- On 2009 Nov 03 UT, the 253 km diameter asteroid (16) Psyche will occult a 11.1 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 10.9 mag (the magnitude of the asteroid) for at most 14.7 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: 99 * date and approx. time of event: 2009 Nov 03, 23:01 - 2009 Nov 03, 23:03 UT * magnitude of target star: 11.1 * magnitude drop [mag]: 0.7 * estimated maximum duration [s]: 14.7 * Moon: 98 % sunlit, 103° distance * Sun: 91° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 809 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 4.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .048 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .048", .027", 89° ) * approx speed of asteroid's shadow [km/s]: 17.1993 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6349-00594-1 by 16 Psyche on 2009 Nov 3 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 - 59 31 0 72 0 0 23 3 22 0 194 -21 ... .. .. - 73 17 16 ... .. .. - 79 42 40 - 60 23 43 71 0 0 23 3 21 1 193 -21 - 49 16 55 - 73 35 28 ... .. .. - 79 42 29 - 61 21 57 70 0 0 23 3 21 2 192 -21 - 50 39 5 - 74 4 55 ... .. .. - 79 57 21 - 62 25 17 69 0 0 23 3 20 3 191 -20 - 52 3 2 - 74 44 26 ... .. .. - 80 25 29 - 63 33 25 68 0 0 23 3 18 5 190 -20 - 53 28 50 - 75 33 11 ... .. .. - 81 5 39 - 64 46 12 67 0 0 23 3 16 6 189 -20 - 54 56 36 - 76 30 38 ... .. .. - 81 57 6 - 66 3 33 66 0 0 23 3 13 7 188 -20 - 56 26 25 - 77 36 30 - 53 4 32 - 82 59 29 - 67 25 28 65 0 0 23 3 10 8 186 -19 - 57 58 27 - 78 50 44 - 54 40 43 - 84 12 49 - 68 52 3 64 0 0 23 3 7 9 185 -19 - 59 32 52 - 80 13 34 - 56 18 34 - 85 37 36 - 70 23 32 63 0 0 23 3 3 10 183 -18 - 61 9 53 - 81 45 26 - 57 58 20 - 87 14 49 - 72 0 12 62 0 0 23 2 58 11 182 -17 - 62 49 45 - 83 27 13 - 59 40 16 - 89 6 14 - 73 42 30 61 0 0 23 2 53 12 180 -16 - 64 32 45 - 85 20 14 - 61 24 39 - 91 14 52 - 75 31 1 60 0 0 23 2 47 13 178 -15 - 66 19 16 - 87 26 34 - 63 11 49 - 93 46 3 - 77 26 34 59 0 0 23 2 40 14 176 -14 - 68 9 45 - 89 49 34 - 65 2 10 - 96 50 22 - 79 30 16 58 0 0 23 2 32 15 174 -13 - 70 4 42 - 92 34 56 - 66 56 10 -100 54 36 Latitude Latitude Latitude Latitude - 81 0 0 57 19 7 23 2 26 15 173 -12 53 6 59 63 28 54 51 44 56 68 7 30 - 82 0 0 56 52 58 23 2 22 16 172 -11 52 44 26 62 51 2 51 23 14 66 56 57 - 83 0 0 56 27 47 23 2 18 16 171 -11 52 22 37 62 15 27 51 2 13 65 59 32 - 84 0 0 56 3 32 23 2 14 16 170 -10 52 1 31 61 41 56 50 41 53 65 9 52 - 85 0 0 55 40 13 23 2 10 17 169 -10 51 41 11 61 10 17 50 22 16 64 25 35 - 86 0 0 55 17 49 23 2 6 17 168 -9 51 21 34 60 40 22 50 3 21 63 45 26 - 87 0 0 54 56 19 23 2 1 17 167 -8 51 2 42 60 12 3 49 45 8 63 8 38 - 88 0 0 54 35 43 23 1 57 17 166 -8 50 44 35 59 45 15 49 27 38 62 34 39 - 89 0 0 54 16 2 23 1 53 17 165 -7 50 27 12 59 19 54 49 10 51 62 3 9 - 90 0 0 53 57 13 23 1 49 18 163 -6 50 10 34 58 55 55 48 54 46 61 33 49 - 91 0 0 53 39 18 23 1 44 18 162 -6 49 54 41 58 33 16 48 39 25 61 6 29 - 92 0 0 53 22 15 23 1 40 18 161 -5 49 39 33 58 11 53 48 24 46 60 40 59 - 93 0 0 53 6 5 23 1 36 18 160 -4 49 25 10 57 51 44 48 10 51 60 17 11 - 94 0 0 52 50 47 23 1 31 18 159 -4 49 11 33 57 32 46 47 57 40 59 54 59 - 95 0 0 52 36 21 23 1 27 18 158 -3 48 58 40 57 14 59 47 45 12 59 34 18 - 96 0 0 52 22 47 23 1 23 18 157 -2 48 46 33 56 58 21 47 33 28 59 15 4 - 97 0 0 52 10 4 23 1 19 18 156 -2 48 35 11 56 42 50 47 22 27 58 57 14 - 98 0 0 51 58 13 23 1 14 18 155 -1 48 24 34 56 28 24 47 12 11 58 40 44 - 99 0 0 51 47 13 23 1 10 18 154 0 48 14 43 56 15 4 47 2 38 58 25 32 Uncertainty in time = +/- 5 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6349-00594-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 00 21.2321 DE: -17 18 21.352 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .047, .025 ) * V mag [mag]: 11.1 * B mag [mag]: 11.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (16) Psyche approx. diameter [km]: 253 approx. diameter ["]: .146 distance from Earth [AU]: 2.38600 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1923 number of rejected observations: 251 time covered by the observations: 1903 May 04 - 2008 Feb 11 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 77° remarks: * orbital elements for (16) Psyche : Mean anomaly = 327.61054254 deg Arg. of pericenter = 226.96954461 deg Long. of node = 150.29376414 deg Inclination = 3.09872627 deg Eccentricity = 0.13865197 Semimajor axis = 2.92376157 AU Perihelion dist = 2.51837628 AU Mag: H = 5.96, G = 0.20 Epoch of elements : MJD 55138.95900000 TDT (2009 Nov 03.959) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 3 16 Psyche 23h 1.5m UT 11.1 21 0 21.232-17 18 21.35TYC 6349-00594-1 11.3 10.9 253 14.7 2.386 2.432 8.20 -73.6172 -17.307 -169.47 -15.33 23.0248 -0.21782 0.92453 9.44964 2.22363 0.00552 0.00162 2000 325.84429920091026.00000226.969545150.293764 3.0987260.13865197 2.9237616 2.5183763 5.9 5.00.20 RATE 1.9714740 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.048 0.027 89 1.19 0.028 0 54545.5020091103_0594-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org