IOTA/IOTA-ES occultation update for (3) Juno / UCAC2 32472723 event on 2009 Jun 08, 08:27 UT Visible from Summary ------- On 2009 Jun 08 UT, the 290 km diameter asteroid (3) Juno will occult a 11.5 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 0.3 mag to 10.1 mag (the magnitude of the asteroid) for at most 13.2 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: 100 * date and approx. time of event: 2009 Jun 08, 08:22 - 2009 Jun 08, 08:26 UT * magnitude of target star: 11.5 * magnitude drop [mag]: 0.3 * estimated maximum duration [s]: 13.2 * Moon: 100 % sunlit, 89° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 332 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .023 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .023", .022", 89° ) * approx speed of asteroid's shadow [km/s]: 21.9448 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 32472723 by 3 Juno on 2009 Jun 8 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 -120 0 0 11 40 14 8 22 50 1 88 -55 10 10 35 13 11 12 9 47 28 13 35 5 -119 0 0 11 42 42 8 22 50 2 88 -55 10 13 1 13 13 42 9 49 55 13 37 36 -118 0 0 11 45 32 8 22 50 3 89 -55 10 15 50 13 16 34 9 52 42 13 40 29 -117 0 0 11 48 44 8 22 50 4 89 -54 10 18 59 13 19 48 9 55 52 13 43 43 -116 0 0 11 52 17 8 22 51 5 89 -54 10 22 30 13 23 24 9 59 22 13 47 19 -115 0 0 11 56 12 8 22 51 6 89 -54 10 26 23 13 27 21 10 3 14 13 51 17 -114 0 0 12 0 28 8 22 52 7 90 -53 10 30 36 13 31 41 10 7 27 13 55 37 -113 0 0 12 5 6 8 22 53 8 90 -53 10 35 11 13 36 21 10 12 1 14 0 19 -112 0 0 12 10 5 8 22 54 9 90 -52 10 40 8 13 41 24 10 16 57 14 5 22 -111 0 0 12 15 26 8 22 54 10 90 -52 10 45 25 13 46 48 10 22 13 14 10 47 -110 0 0 12 21 8 8 22 55 11 90 -52 10 51 4 13 52 33 10 27 51 14 16 33 -109 0 0 12 27 11 8 22 57 12 91 -51 10 57 3 13 58 40 10 33 49 14 22 41 -108 0 0 12 33 35 8 22 58 13 91 -50 11 3 24 14 5 8 10 40 9 14 29 10 -107 0 0 12 40 21 8 22 59 14 91 -50 11 10 5 14 11 57 10 46 50 14 36 1 -106 0 0 12 47 27 8 23 0 15 91 -49 11 17 7 14 19 8 10 53 51 14 43 12 -105 0 0 12 54 54 8 23 2 16 92 -49 11 24 30 14 26 39 11 1 13 14 50 45 -104 0 0 13 2 42 8 23 4 17 92 -48 11 32 14 14 34 32 11 8 55 14 58 39 -103 0 0 13 10 51 8 23 5 18 92 -48 11 40 18 14 42 45 11 16 58 15 6 54 -102 0 0 13 19 20 8 23 7 19 93 -47 11 48 43 14 51 19 11 25 21 15 15 29 -101 0 0 13 28 9 8 23 9 20 93 -46 11 57 27 15 0 14 11 34 5 15 24 25 -100 0 0 13 37 19 8 23 11 20 93 -46 12 6 32 15 9 29 11 43 9 15 33 41 - 99 0 0 13 46 49 8 23 13 21 93 -45 12 15 57 15 19 5 11 52 32 15 43 18 - 98 0 0 13 56 39 8 23 15 22 94 -44 12 25 42 15 29 0 12 2 16 15 53 15 - 97 0 0 14 6 49 8 23 17 23 94 -43 12 35 46 15 39 16 12 12 19 16 3 32 - 96 0 0 14 17 19 8 23 20 24 94 -43 12 46 11 15 49 51 12 22 42 16 14 9 - 95 0 0 14 28 8 8 23 22 25 95 -42 12 56 54 16 0 46 12 33 24 16 25 6 - 94 0 0 14 39 16 8 23 25 26 95 -41 13 7 57 16 12 0 12 44 25 16 36 22 - 93 0 0 14 50 44 8 23 27 27 96 -40 13 19 18 16 23 34 12 55 45 16 47 57 - 92 0 0 15 2 30 8 23 30 28 96 -40 13 30 59 16 35 26 13 7 24 16 59 51 - 91 0 0 15 14 35 8 23 33 29 96 -39 13 42 58 16 47 38 13 19 21 17 12 4 - 90 0 0 15 26 59 8 23 36 30 97 -38 13 55 15 17 0 8 13 31 37 17 24 36 - 89 0 0 15 39 40 8 23 39 31 97 -37 14 7 51 17 12 56 13 44 11 17 37 26 - 88 0 0 15 52 40 8 23 42 32 98 -36 14 20 44 17 26 2 13 57 3 17 50 34 - 87 0 0 16 5 58 8 23 45 33 98 -35 14 33 56 17 39 26 14 10 13 18 4 0 - 86 0 0 16 19 33 8 23 48 34 99 -35 14 47 24 17 53 8 14 23 40 18 17 43 - 85 0 0 16 33 25 8 23 51 35 99 -34 15 1 10 18 7 7 14 37 24 18 31 44 - 84 0 0 16 47 34 8 23 55 36 100 -33 15 15 13 18 21 23 14 51 26 18 46 2 - 83 0 0 17 2 0 8 23 58 37 101 -32 15 29 32 18 35 56 15 5 43 19 0 36 - 82 0 0 17 16 43 8 24 2 37 101 -31 15 44 8 18 50 45 15 20 17 19 15 27 - 81 0 0 17 31 41 8 24 5 38 102 -30 15 59 0 19 5 50 15 35 8 19 30 34 - 80 0 0 17 46 55 8 24 9 39 103 -29 16 14 7 19 21 11 15 50 13 19 45 57 - 79 0 0 18 2 24 8 24 12 40 103 -28 16 29 30 19 36 47 16 5 35 20 1 35 - 78 0 0 18 18 9 8 24 16 41 104 -27 16 45 8 19 52 38 16 21 11 20 17 28 - 77 0 0 18 34 8 8 24 20 42 105 -27 17 1 1 20 8 44 16 37 2 20 33 36 - 76 0 0 18 50 22 8 24 24 43 105 -26 17 17 8 20 25 5 16 53 8 20 49 58 - 75 0 0 19 6 49 8 24 28 44 106 -25 17 33 29 20 41 39 17 9 27 21 6 34 - 74 0 0 19 23 30 8 24 32 44 107 -24 17 50 4 20 58 27 17 26 0 21 23 24 - 73 0 0 19 40 25 8 24 36 45 108 -23 18 6 52 21 15 28 17 42 47 21 40 27 - 72 0 0 19 57 32 8 24 40 46 109 -22 18 23 53 21 32 42 17 59 46 21 57 42 - 71 0 0 20 14 52 8 24 45 47 110 -21 18 41 7 21 50 8 18 16 58 22 15 10 - 70 0 0 20 32 24 8 24 49 48 111 -20 18 58 32 22 7 46 18 34 22 22 32 50 - 69 0 0 20 50 7 8 24 53 48 112 -19 19 16 10 22 25 36 18 51 58 22 50 41 - 68 0 0 21 8 1 8 24 57 49 113 -18 19 33 58 22 43 36 19 9 45 23 8 44 - 67 0 0 21 26 7 8 25 2 50 114 -17 19 51 58 23 1 48 19 27 43 23 26 57 - 66 0 0 21 44 22 8 25 6 51 115 -16 20 10 7 23 20 9 19 45 51 23 45 20 - 65 0 0 22 2 47 8 25 11 51 117 -15 20 28 27 23 38 40 20 4 10 24 3 52 - 64 0 0 22 21 22 8 25 15 52 118 -14 20 46 57 23 57 21 20 22 38 24 22 34 - 63 0 0 22 40 6 8 25 20 53 119 -13 21 5 35 24 16 10 20 41 15 24 41 25 - 62 0 0 22 58 58 8 25 25 53 121 -12 21 24 22 24 35 7 21 0 0 25 0 24 - 61 0 0 23 17 58 8 25 29 54 122 -11 21 43 17 24 54 13 21 18 54 25 19 30 - 60 0 0 23 37 5 8 25 34 55 124 -10 22 2 20 25 13 25 21 37 56 25 38 44 - 59 0 0 23 56 20 8 25 39 55 125 -9 22 21 29 25 32 44 21 57 4 25 58 5 - 58 0 0 24 15 41 8 25 43 56 127 -8 22 40 46 25 52 10 22 16 20 26 17 32 - 57 0 0 24 35 8 8 25 48 56 128 -7 23 0 9 26 11 42 22 35 41 26 37 5 - 56 0 0 24 54 41 8 25 53 57 130 -7 23 19 37 26 31 18 22 55 9 26 56 42 - 55 0 0 25 14 18 8 25 58 57 132 -6 23 39 11 26 51 0 23 14 42 27 16 25 - 54 0 0 25 34 0 8 26 2 58 134 -5 23 58 49 27 10 46 23 34 19 27 36 12 - 53 0 0 25 53 46 8 26 7 58 135 -4 24 18 32 27 30 35 23 54 1 27 56 2 - 52 0 0 26 13 35 8 26 12 59 137 -3 24 38 18 27 50 28 24 13 46 28 15 56 - 51 0 0 26 33 28 8 26 17 59 139 -2 24 58 8 28 10 24 24 33 35 28 35 52 - 50 0 0 26 53 23 8 26 22 59 141 -1 25 18 0 28 30 21 24 53 26 28 55 51 Uncertainty in time = +/- 2 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: UCAC2 32472723 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 27 31.7990 DE: +01 48 11.440 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 11.5 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3) Juno approx. diameter [km]: 290 approx. diameter ["]: .168 distance from Earth [AU]: 2.37500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 5771 number of rejected observations: 580 time covered by the observations: 1900 Sep 18 - 2007 Jun 07 1 sigma uncertainty ellipse (major, minor, PA): 0.009, 0.007, 82° remarks: * orbital elements for (3) Juno : Mean anomaly = 299.67629690 deg Arg. of pericenter = 248.00358801 deg Long. of node = 169.91244233 deg Inclination = 12.97875637 deg Eccentricity = 0.25532847 Semimajor axis = 2.67165799 AU Perihelion dist = 1.98950765 AU Mag: H = 5.30, G = 0.32 Epoch of elements : MJD 54990.35200000 TDT (2009 Jun 08.352) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 8 3 Juno 8h 27.1m UT 11.5 23 27 31.799 1 48 11.44UCAC2 32472723 0.0 10.1 290 13.2 2.375 2.915 13.91 -31.7420 1.800 53.00 22.87 8.4510 -0.14681 0.46560 11.80264 3.75732 -0.00497 -0.00209 2000 299.5968502009 6 8.00000248.003588169.912442 12.9787560.25532847 2.6716580 1.9895076 5.3 5.00.32 RATE 2.2570070 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.023 0.022 89 1.13 0.023 0 54545.5020090608_472723 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 09:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org