IOTA/IOTA-ES occultation update for (921) Jovita / 2UCAC 34016396 event on 2015 Aug 07, 01:13 UT Visible from SE Canada, E USA Summary ------- On 2015 Aug 07 UT, the 61 km diameter asteroid (921) Jovita will occult a 11.8 mag star in the constellation Aquila for observers along a path across SE Canada, E USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.1 mag to 13.8 mag (the magnitude of the asteroid) for at most 6.0 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: 91 * date and approx. time of event: 2015 Aug 07, 01:08 - 2015 Aug 07, 01:19 UT * geocentric midpoint of event [JD]: 2457241.55131667 * magnitude of target star: 11.8 * magnitude drop [mag]: 2.1 * estimated maximum duration [s]: 6.0 * Moon: 50 % sunlit, 95° distance * Sun: 155° distance * rough path description: SE Canada, E USA The occultation path -------------------- * approximate projected width [km]: 98 * 1 sigma uncertainty interval [path widths]: +/- 0.50 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .039 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .021", 81° ) * approx speed of asteroid's shadow [km/s]: 10.0487 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 34016396 by 921 Jovita on 2015 Aug 7 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 - 23 12 24 72 55 19 1 8 54 23 184 0 - 22 52 10 72 19 46 - 23 33 51 73 31 43 - 22 33 0 71 45 1 - 23 56 42 74 9 3 - 25 56 52 71 49 25 1 9 4 24 181 -1 - 25 32 45 71 15 25 - 26 22 27 72 24 9 - 25 9 56 70 42 7 - 26 49 44 72 59 41 - 28 23 32 70 45 38 1 9 14 26 178 -2 - 27 56 46 70 13 1 - 28 51 53 71 18 54 - 27 31 24 69 41 0 - 29 22 1 71 52 50 - 30 36 11 69 43 48 1 9 24 27 176 -3 - 30 7 36 69 12 25 - 31 6 22 70 15 44 - 29 40 27 68 41 34 - 31 38 21 70 48 16 - 32 37 33 68 43 44 1 9 34 27 173 -4 - 32 7 43 68 13 28 - 33 8 58 69 14 30 - 31 39 19 67 43 40 - 33 42 8 69 45 46 - 34 29 43 67 45 17 1 9 44 28 171 -5 - 33 59 3 67 16 2 - 35 1 56 68 14 59 - 33 29 45 66 47 12 - 35 35 50 68 45 8 - 36 14 15 66 48 20 1 9 54 29 169 -5 - 35 43 1 66 20 0 - 36 46 58 67 17 3 - 35 13 8 65 52 2 - 37 21 18 67 46 11 - 37 52 23 65 52 45 1 10 4 30 167 -6 - 37 20 47 65 25 15 - 38 25 23 66 20 35 - 36 50 30 64 58 6 - 38 59 56 66 48 47 - 39 25 4 64 58 25 1 10 14 31 166 -7 - 38 53 16 64 31 42 - 39 58 13 65 25 27 - 38 22 43 64 5 17 - 40 32 50 65 52 48 - 40 53 7 64 5 15 1 10 24 31 164 -7 - 40 21 13 63 39 15 - 41 26 17 64 31 32 - 39 50 31 63 13 31 - 42 0 51 64 58 7 - 42 17 8 63 13 9 1 10 34 32 162 -8 - 41 45 14 62 47 49 - 42 50 16 63 38 45 - 41 14 28 62 22 43 - 43 24 43 64 4 37 - 43 37 40 62 22 4 1 10 44 33 160 -8 - 43 5 49 61 57 20 - 44 10 42 62 47 2 - 42 35 3 61 32 50 - 44 45 0 63 12 14 - 44 55 10 61 31 55 1 10 54 33 159 -9 - 44 23 24 61 7 45 - 45 28 4 61 56 17 - 43 52 40 60 43 49 - 46 2 9 62 20 52 - 46 9 59 60 42 37 1 11 4 34 157 -9 - 45 38 20 60 19 0 - 46 42 43 61 6 26 - 45 7 41 59 55 34 - 47 16 35 61 30 27 - 47 22 27 59 54 9 1 11 14 34 155 -10 - 46 50 56 59 31 2 - 47 54 59 60 17 26 - 46 20 23 59 8 5 - 48 28 37 60 40 55 - 48 32 49 59 6 26 1 11 24 35 154 -10 - 48 1 27 58 43 47 - 49 5 10 59 29 14 - 47 31 1 58 21 18 - 49 38 33 59 52 13 - 49 41 20 58 19 25 1 11 34 35 152 -10 - 49 10 8 57 57 13 - 50 13 29 58 41 46 - 48 39 49 57 35 10 - 50 46 37 59 4 17 - 50 48 12 57 33 5 1 11 44 36 151 -11 - 50 17 10 57 11 18 - 51 20 9 57 55 0 - 49 47 0 56 49 39 - 51 53 3 58 17 4 - 51 53 36 56 47 22 1 11 54 36 149 -11 - 51 22 44 56 25 59 - 52 25 21 57 8 53 - 50 52 42 56 4 44 - 52 58 1 57 30 32 - 52 57 42 56 2 15 1 12 4 36 148 -11 - 52 27 0 55 41 15 - 53 29 15 56 23 23 - 51 57 6 55 20 21 - 54 1 41 56 44 38 - 54 0 38 55 17 42 1 12 14 37 146 -12 - 53 30 5 54 57 3 - 54 31 59 55 38 27 - 53 0 20 54 36 30 - 55 4 12 55 59 19 - 55 2 31 54 33 39 1 12 24 37 145 -12 - 54 32 8 54 13 21 - 55 33 41 54 54 4 - 54 2 31 53 53 8 - 56 5 41 55 14 35 - 56 3 29 53 50 7 1 12 34 37 143 -12 - 55 33 15 53 30 8 - 56 34 29 54 10 12 - 55 3 46 53 10 14 - 57 6 17 54 30 22 - 57 3 38 53 7 3 1 12 44 37 142 -12 - 56 33 33 52 47 22 - 57 34 28 53 26 48 - 56 4 11 52 27 47 - 58 6 4 53 46 39 - 58 3 3 52 24 25 1 12 54 38 140 -12 - 57 33 6 52 5 2 - 58 33 43 52 43 53 - 57 3 51 51 45 44 - 59 5 9 53 3 25 - 59 1 50 51 42 13 1 13 4 38 139 -13 - 58 32 1 51 23 7 - 59 32 22 52 1 23 - 58 2 53 51 4 6 - 60 3 38 52 20 37 - 60 0 4 51 0 24 1 13 14 38 138 -13 - 59 30 22 50 41 34 - 60 30 28 51 19 17 - 59 1 20 50 22 49 - 61 1 34 51 38 15 - 60 57 49 50 18 57 1 13 24 38 136 -13 - 60 28 14 50 0 24 - 61 28 5 50 37 35 - 59 59 18 49 41 54 - 61 59 3 50 56 16 - 61 55 10 49 37 52 1 13 34 38 135 -13 - 61 25 41 49 19 34 - 62 25 19 49 56 14 - 60 56 50 49 1 19 - 62 56 9 50 14 40 - 62 52 10 48 57 7 1 13 44 38 133 -13 - 62 22 46 48 39 3 - 63 22 13 49 15 14 - 61 54 0 48 21 2 - 63 52 57 49 33 25 - 63 48 54 48 16 41 1 13 54 38 132 -13 - 63 19 35 47 58 51 - 64 18 52 48 34 34 - 62 50 52 47 41 4 - 64 49 29 48 52 29 - 64 45 25 47 36 33 1 14 4 38 131 -13 - 64 16 9 47 18 56 - 65 15 18 47 54 12 - 63 47 30 47 1 23 - 65 45 50 48 11 53 - 65 41 46 46 56 41 1 14 14 38 129 -13 - 65 12 34 46 39 18 - 66 11 35 47 14 7 - 64 43 57 46 21 57 - 66 42 3 47 31 35 - 66 38 1 46 17 6 1 14 24 38 128 -13 - 66 8 51 45 59 55 - 67 7 47 46 34 19 - 65 40 17 45 42 47 - 67 38 11 46 51 33 - 67 34 14 45 37 45 1 14 34 38 127 -13 - 67 5 6 45 20 47 - 68 3 58 45 54 46 - 66 36 32 45 3 51 - 68 34 19 46 11 48 - 68 30 27 44 58 39 1 14 44 38 125 -13 - 68 1 20 44 41 53 - 69 0 10 45 15 27 - 67 32 47 44 25 8 - 69 30 29 45 32 17 - 69 26 44 44 19 46 1 14 54 38 124 -13 - 68 57 37 44 3 11 - 69 56 26 44 36 22 - 68 29 4 43 46 38 - 70 26 45 44 52 59 - 70 23 8 43 41 5 1 15 4 37 123 -13 - 69 54 0 43 24 41 - 70 52 51 43 57 29 - 69 25 26 43 8 20 - 71 23 10 44 13 55 - 71 19 43 43 2 35 1 15 14 37 121 -13 - 70 50 33 42 46 23 - 71 49 27 43 18 48 - 70 21 57 42 30 12 - 72 19 48 43 35 3 - 72 16 31 42 24 16 1 15 24 37 120 -13 - 71 47 19 42 8 15 - 72 46 18 42 40 18 - 71 18 40 41 52 15 - 73 16 41 42 56 22 - 73 13 36 41 46 7 1 15 34 37 119 -12 - 72 44 20 41 30 16 - 73 43 27 42 1 59 - 72 15 38 41 14 26 - 74 13 54 42 17 51 - 74 11 3 41 8 7 1 15 44 36 117 -12 - 73 41 42 40 52 27 - 74 40 58 41 23 48 - 73 12 55 40 36 47 - 75 11 30 41 39 29 - 75 8 53 40 30 15 1 15 53 36 116 -12 - 74 39 26 40 14 45 - 75 38 55 40 45 45 - 74 10 33 39 59 15 - 76 9 32 41 1 16 - 76 7 12 39 52 30 1 16 3 36 115 -12 - 75 37 38 39 37 10 - 76 37 20 40 7 50 - 75 8 38 39 21 50 - 77 8 6 40 23 11 - 77 6 2 39 14 52 1 16 13 35 114 -11 - 76 36 20 38 59 42 - 77 36 20 39 30 2 - 76 7 12 38 44 32 - 78 7 14 39 45 12 - 78 5 29 38 37 19 1 16 23 35 113 -11 - 77 35 37 38 22 19 - 78 35 57 38 52 20 - 77 6 19 38 7 19 - 79 7 2 39 7 19 - 79 5 37 37 59 52 1 16 33 34 111 -11 - 78 35 33 37 45 1 - 79 36 17 38 14 42 - 78 6 4 37 30 10 - 80 7 34 38 29 31 - 80 6 31 37 22 28 1 16 43 34 110 -10 - 79 36 14 37 7 47 - 80 37 24 37 37 8 - 79 6 32 36 53 5 - 81 8 55 37 51 48 - 81 8 15 36 45 7 1 16 53 33 109 -10 - 80 37 43 36 30 35 - 81 39 24 36 59 37 - 80 7 47 36 16 4 - 82 11 12 37 14 7 - 82 10 56 36 7 48 1 17 3 33 108 -10 - 81 40 8 35 53 26 - 82 42 23 36 22 8 - 81 9 55 35 39 4 - 83 14 30 36 36 27 - 83 14 41 35 30 30 1 17 13 32 107 -9 - 82 43 33 35 16 18 - 83 46 28 35 44 40 - 82 13 2 35 2 5 - 84 18 56 35 58 49 - 84 19 36 34 53 11 1 17 23 32 106 -9 - 83 48 6 34 39 9 - 84 51 46 35 7 12 - 83 17 14 34 25 6 - 85 24 38 35 21 10 - 85 25 49 34 15 51 1 17 33 31 105 -8 - 84 53 54 34 1 59 - 85 58 25 34 29 42 - 84 22 39 33 48 5 - 86 31 44 34 43 30 - 86 33 29 33 38 29 1 17 43 30 103 -8 - 86 1 6 33 24 47 - 87 6 35 33 52 9 - 85 29 24 33 11 3 - 87 40 26 34 5 46 - 87 42 46 33 1 2 1 17 53 29 102 -7 - 87 9 51 32 47 30 - 88 16 26 33 14 31 - 86 37 39 32 33 57 - 88 50 53 33 27 58 - 88 53 53 32 23 30 1 18 3 29 101 -7 - 88 20 21 32 10 9 - 89 28 11 32 36 48 - 87 47 34 31 56 45 - 90 3 19 32 50 3 - 90 7 2 31 45 49 1 18 13 28 100 -6 - 89 32 49 31 32 40 - 90 42 5 31 58 56 - 88 59 23 31 19 27 - 91 18 0 32 11 59 - 91 22 31 31 8 0 1 18 23 27 99 -5 - 90 47 30 30 55 1 - 91 58 25 31 20 54 - 90 13 19 30 42 0 - 92 35 15 31 33 45 - 92 40 38 30 29 57 1 18 33 26 98 -4 - 92 4 42 30 17 12 - 93 17 32 30 42 39 - 91 29 38 30 4 22 - 93 55 26 30 55 16 - 94 1 48 29 51 40 1 18 43 25 97 -4 - 93 24 46 29 39 8 - 94 39 51 30 4 8 - 92 48 43 29 26 31 - 95 19 0 30 16 30 - 95 26 29 29 13 4 1 18 53 24 96 -3 - 94 48 11 29 0 46 - 96 5 55 29 25 16 - 94 10 57 28 48 23 - 96 46 34 29 37 22 - 96 55 19 28 34 4 1 19 3 23 95 -2 - 96 15 30 28 22 2 - 97 36 25 28 46 0 - 95 36 52 28 9 54 - 98 18 52 28 57 48 - 98 29 7 27 54 36 1 19 13 21 94 -1 - 97 47 27 27 42 52 - 99 12 14 28 6 12 - 97 7 7 27 31 1 - 99 56 56 28 17 39 Uncertainty in time = +/- 5 secs Prediction of 2015 Jul 18.0 Data for the target star ------------------------ * name: 2UCAC 34016396 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 22 25.6184 DE: +06 13 32.042 * position source: URAT1 * standard error: RA,DE ["]: ( .014, .014 ) * V mag [mag]: 11.8 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (921) Jovita approx. diameter [km]: 61 approx. diameter ["]: .049 distance from Earth [AU]: 1.71300 * orbital information: orbit source: Preston date of fit: 2015 Jul 17 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1176 number of rejected observations: 30 time covered by the observations: 1919 Sep 05 - 2015 Jun 25 1 sigma uncertainty ellipse (major, minor, PA): 0.037, 0.016, 80° remarks: * orbital elements for (921) Jovita : Mean anomaly = 24.21626421 deg Arg. of pericenter = 70.82645837 deg Long. of node = 204.92333132 deg Inclination = 16.33276475 deg Eccentricity = 0.18319808 Semimajor axis = 3.17197631 AU Perihelion dist = 2.59087635 AU Mag: H = 9.93, G = 0.15 Epoch of elements : MJD 57241.05100000 TDT (2015 Aug 07.051) ------ occelmnt file for Occult BEGIN ----------------------------------- 2015 Aug 7 921 Jovita 1h 13.9m UT 11.8 20 22 25.618 6 13 32.042UCAC 34016396 0.0 13.8 61 6.0 1.713 -1.692 -14.54 -28.1185 6.231 162.99 16.55 1.2316 -0.39092 0.67923 -4.91520 -2.83011 0.00097 -0.00215 2000 24.0329012015 8 6.00000 70.826458204.923331 16.3327650.18319808 3.1719763 2.5908763 9.9 5.00.15 RATE 1.7446530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.040 0.021 81 1.50 0.025 0 0 4 2 057221.0020150807_016396 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2015 Jul 17, 17:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org