IOTA/IOTA-ES occultation update for (93) Minerva / TYC 0625-00755-1 event on 2009 Aug 04, 23:52 UT Visible from Summary ------- On 2009 Aug 04 UT, the 157 km diameter asteroid (93) Minerva will occult a 12.2 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.0 mag to 12.6 mag (the magnitude of the asteroid) for at most 18.0 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: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2009 Aug 04, 23:39 - 2009 Aug 04, 23:55 UT * magnitude of target star: 12.2 * magnitude drop [mag]: 1.0 * estimated maximum duration [s]: 18.0 * Moon: 99 % sunlit, 87° distance * Sun: 105° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 161 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 5.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .024", 83° ) * approx speed of asteroid's shadow [km/s]: 8.7104 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0625-00755-1 by 93 Minerva on 2009 Aug 4 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 - 4 56 26 -27 0 0 23 39 39 2 77 -75 - 1 46 53 ... .. .. - 0 13 58 ... .. .. - 0 51 4 -26 0 0 23 39 42 5 75 -79 1 50 5 - 3 51 1 3 11 10 - 5 38 58 Latitude Latitude Latitude Latitude 0 0 0 -25 46 1 23 39 43 6 74 -79 -26 31 37 -25 0 15 -26 56 11 -24 35 29 1 0 0 -25 28 55 23 39 44 7 74 -80 -26 14 41 -24 42 59 -26 39 21 -24 18 6 2 0 0 -25 11 4 23 39 46 8 74 -81 -25 57 2 -24 24 58 -26 21 47 -23 59 59 3 0 0 -24 52 30 23 39 48 9 73 -81 -25 38 38 -24 6 11 -26 3 29 -23 41 7 4 0 0 -24 33 10 23 39 50 10 73 -82 -25 19 30 -23 46 40 -25 44 27 -23 21 29 5 0 0 -24 13 4 23 39 52 11 72 -83 -24 59 36 -23 26 22 -25 24 40 -23 1 4 6 0 0 -23 52 12 23 39 55 12 72 -83 -24 38 57 -23 5 18 -25 4 7 -22 39 53 7 0 0 -23 30 34 23 39 58 13 71 -83 -24 17 32 -22 43 26 -24 42 49 -22 17 55 8 0 0 -23 8 9 23 40 1 14 71 -84 -23 55 19 -22 20 47 -24 20 44 -21 55 8 9 0 0 -22 44 55 23 40 4 15 71 -84 -23 32 20 -21 57 20 -23 57 51 -21 31 34 10 0 0 -22 20 54 23 40 8 16 70 -84 -23 8 32 -21 33 4 -23 34 12 -21 7 10 11 0 0 -21 56 3 23 40 12 17 70 -83 -22 43 56 -21 7 59 -23 9 43 -20 41 57 12 0 0 -21 30 23 23 40 16 18 70 -83 -22 18 31 -20 42 4 -22 44 27 -20 15 53 13 0 0 -21 3 53 23 40 20 19 69 -82 -21 52 17 -20 15 18 -22 18 20 -19 48 59 14 0 0 -20 36 33 23 40 25 20 69 -82 -21 25 12 -19 47 42 -21 51 24 -19 21 14 15 0 0 -20 8 22 23 40 30 21 69 -81 -20 57 17 -19 19 14 -21 23 38 -18 52 37 16 0 0 -19 39 19 23 40 35 22 68 -80 -20 28 31 -18 49 54 -20 55 0 -18 23 8 17 0 0 -19 9 24 23 40 40 23 68 -80 -19 58 53 -18 19 42 -20 25 32 -17 52 47 18 0 0 -18 38 36 23 40 46 25 68 -79 -19 28 23 -17 48 37 -19 55 11 -17 21 32 19 0 0 -18 6 56 23 40 52 26 67 -78 -18 57 0 -17 16 38 -19 23 58 -16 49 23 20 0 0 -17 34 22 23 40 59 27 67 -77 -18 24 44 -16 43 46 -18 51 51 -16 16 21 21 0 0 -17 0 54 23 41 6 28 67 -76 -17 51 35 -16 9 59 -18 18 52 -15 42 24 22 0 0 -16 26 31 23 41 13 29 67 -75 -17 17 31 -15 35 18 -17 44 59 -15 7 32 23 0 0 -15 51 14 23 41 20 30 67 -74 -16 42 34 -14 59 41 -17 10 11 -14 31 45 24 0 0 -15 15 3 23 41 28 31 66 -73 -16 6 41 -14 23 10 -16 34 29 -13 55 3 25 0 0 -14 37 56 23 41 36 33 66 -72 -15 29 54 -13 45 43 -15 57 53 -13 17 24 26 0 0 -13 59 53 23 41 44 34 66 -71 -14 52 12 -13 7 20 -15 20 21 -12 38 51 27 0 0 -13 20 55 23 41 53 35 66 -69 -14 13 35 -12 28 1 -14 41 55 -11 59 21 28 0 0 -12 41 2 23 42 2 36 66 -68 -13 34 2 -11 47 47 -14 2 33 -11 18 55 29 0 0 -12 0 13 23 42 12 37 66 -67 -12 53 33 -11 6 37 -13 22 16 -10 37 33 30 0 0 -11 18 28 23 42 22 38 66 -66 -12 12 10 -10 24 31 -12 41 3 - 9 55 16 31 0 0 -10 35 49 23 42 32 40 66 -65 -11 29 51 - 9 41 30 -11 58 56 - 9 12 3 32 0 0 - 9 52 14 23 42 43 41 66 -64 -10 46 38 - 8 57 34 -11 15 54 - 8 27 55 33 0 0 - 9 7 44 23 42 54 42 66 -62 -10 2 30 - 8 12 43 -10 31 57 - 7 42 52 34 0 0 - 8 22 21 23 43 5 43 66 -61 - 9 17 27 - 7 26 57 - 9 47 6 - 6 56 55 35 0 0 - 7 36 4 23 43 17 45 66 -60 - 8 31 32 - 6 40 19 - 9 1 22 - 6 10 5 36 0 0 - 6 48 54 23 43 29 46 66 -59 - 7 44 43 - 5 52 47 - 8 14 45 - 5 22 22 37 0 0 - 6 0 52 23 43 41 47 66 -57 - 6 57 2 - 5 4 24 - 7 27 15 - 4 33 47 38 0 0 - 5 12 0 23 43 54 49 67 -56 - 6 8 31 - 4 15 10 - 6 38 55 - 3 44 22 39 0 0 - 4 22 17 23 44 8 50 67 -55 - 5 19 9 - 3 25 7 - 5 49 45 - 2 54 7 40 0 0 - 3 31 47 23 44 21 51 67 -54 - 4 28 59 - 2 34 16 - 4 59 45 - 2 3 4 41 0 0 - 2 40 29 23 44 35 52 68 -52 - 3 38 2 - 1 42 38 - 4 8 59 - 1 11 15 42 0 0 - 1 48 26 23 44 49 54 68 -51 - 2 46 19 - 0 50 15 - 3 17 26 - 0 18 42 43 0 0 - 0 55 40 23 45 4 55 69 -50 - 1 53 52 0 2 51 - 2 25 9 0 34 35 44 0 0 - 0 2 12 23 45 19 56 69 -48 - 1 0 42 0 56 37 - 1 32 10 1 28 32 45 0 0 0 51 55 23 45 34 58 70 -47 - 0 6 54 1 51 3 - 0 38 31 2 23 7 46 0 0 1 46 39 23 45 50 59 71 -45 0 47 33 2 46 4 0 15 46 3 18 18 47 0 0 2 41 58 23 46 6 60 72 -44 1 42 35 3 41 40 1 10 39 4 14 3 48 0 0 3 37 48 23 46 22 62 73 -43 2 38 10 4 37 46 2 6 5 5 10 18 49 0 0 4 34 8 23 46 38 63 74 -41 3 34 14 5 34 21 3 2 2 6 7 1 50 0 0 5 30 54 23 46 55 64 76 -40 4 30 46 6 31 21 3 58 26 7 4 9 51 0 0 6 28 3 23 47 12 65 77 -39 5 27 42 7 28 43 4 55 15 8 1 38 52 0 0 7 25 31 23 47 29 67 79 -37 6 24 59 8 26 24 5 52 25 8 59 25 53 0 0 8 23 17 23 47 46 68 81 -36 7 22 33 9 24 20 6 49 54 9 57 28 54 0 0 9 21 15 23 48 3 69 83 -34 8 20 22 10 22 29 7 47 37 10 55 41 55 0 0 10 19 24 23 48 21 70 85 -33 9 18 22 11 20 45 8 45 33 11 54 2 56 0 0 11 17 38 23 48 38 71 88 -32 10 16 29 12 19 7 9 43 36 12 52 28 57 0 0 12 15 55 23 48 56 72 91 -30 11 14 40 13 17 30 10 41 43 13 50 54 58 0 0 13 14 11 23 49 14 73 95 -29 12 12 51 14 15 50 11 39 52 14 49 16 59 0 0 14 12 21 23 49 32 74 99 -28 13 10 59 15 14 4 12 37 58 15 47 32 60 0 0 15 10 24 23 49 50 75 103 -26 14 8 59 16 12 8 13 35 57 16 45 37 61 0 0 16 8 14 23 50 8 76 108 -25 15 6 49 17 9 59 14 33 47 17 43 28 62 0 0 17 5 49 23 50 25 76 114 -23 16 4 25 18 7 33 15 31 23 18 41 1 63 0 0 18 3 5 23 50 43 77 119 -22 17 1 43 19 4 47 16 28 42 19 38 13 64 0 0 18 59 59 23 51 1 77 126 -21 17 58 40 20 1 36 17 25 41 20 35 1 65 0 0 19 56 27 23 51 19 77 132 -19 18 55 13 20 57 59 18 22 16 21 31 21 66 0 0 20 52 26 23 51 36 77 139 -18 19 51 18 21 53 52 19 18 25 22 27 10 67 0 0 21 47 53 23 51 53 77 145 -17 20 46 53 22 49 11 20 14 4 23 22 26 68 0 0 22 42 46 23 52 11 77 151 -16 21 41 54 23 43 55 21 9 10 24 17 4 69 0 0 23 37 1 23 52 28 77 157 -14 22 36 20 24 38 0 22 3 40 25 11 4 70 0 0 24 30 37 23 52 44 76 163 -13 23 30 6 25 31 25 22 57 32 26 4 22 71 0 0 25 23 30 23 53 1 76 168 -12 24 23 11 26 24 5 23 50 44 26 56 56 72 0 0 26 15 39 23 53 17 75 173 -10 25 15 33 27 16 1 24 43 13 27 48 44 73 0 0 27 7 2 23 53 34 74 177 -9 26 7 10 28 7 9 25 34 57 28 39 45 74 0 0 27 57 36 23 53 49 73 181 -8 26 58 0 28 57 29 26 25 55 29 29 56 75 0 0 28 47 21 23 54 5 72 184 -7 27 48 0 29 46 57 27 16 4 30 19 16 76 0 0 29 36 14 23 54 20 71 187 -6 28 37 10 30 35 34 28 5 23 31 7 43 77 0 0 30 24 16 23 54 36 71 190 -5 29 25 29 31 23 18 28 53 50 31 55 17 78 0 0 31 11 24 23 54 50 70 193 -3 30 12 55 32 10 7 29 41 26 32 41 57 79 0 0 31 57 37 23 55 5 69 195 -2 30 59 27 32 56 2 30 28 8 33 27 41 80 0 0 32 42 56 23 55 19 68 197 -1 31 45 4 33 41 1 31 13 55 34 12 30 81 0 0 33 27 18 23 55 33 67 199 0 32 29 46 34 25 4 31 58 48 34 56 22 Uncertainty in time = +/- 6 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0625-00755-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 43 14.6568 DE: +11 08 56.268 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .022 ) * V mag [mag]: 12.2 * B mag [mag]: 12.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (93) Minerva approx. diameter [km]: 157 approx. diameter ["]: .097 distance from Earth [AU]: 2.23700 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 865 number of rejected observations: 119 time covered by the observations: 1913 Sep 28 - 2008 Mar 12 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.011, 59° remarks: * orbital elements for (93) Minerva : Mean anomaly = 70.90237145 deg Arg. of pericenter = 275.38621491 deg Long. of node = 4.08391142 deg Inclination = 8.56147444 deg Eccentricity = 0.14213159 Semimajor axis = 2.75402064 AU Perihelion dist = 2.36258730 AU Mag: H = 7.81, G = 0.15 Epoch of elements : MJD 55047.99400000 TDT (2009 Aug 04.994) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 4 93 Minerva 23h 51.6m UT 12.2 1 43 14.657 11 8 56.27TYC 0625-00755-1 12.6 12.6 157 18.0 2.237 1.001 12.50 74.2489 11.146 -176.37 16.99 23.8592 -0.13915 0.16509 3.75032 3.17896 -0.00497 -0.00192 2000 69.1784502009 728.00000275.386215 4.083911 8.5614740.14213159 2.7540206 2.3625873 7.7 5.00.15 RATE 2.1565190 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.024 83 1.27 0.027 0 54545.5020090804_0755-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 11:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org