IOTA/IOTA-ES occultation update for (695) Bella / TYC 1732-00076-1 event on 2022 Oct 23, 02:21 UT Visible from E Canada, E USA, Mexico Summary ------- On 2022 Oct 23 UT, the 41.1 km diameter asteroid (695) Bella will occult a 10.6 mag star in the constellation Pegasus for observers along a path across E Canada, E USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.64 mag to 12.01 mag (the magnitude of the asteroid) for at most 5.190 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 98 * date and approx. time of event: 2022 Oct 23, 02:08 - 2022 Oct 23, 02:34 * geocentric midpoint of event [JD]: 2459875.59839196 * magnitude of target star: 10.64 * magnitude drop [mag]: 1.64 * estimated maximum duration [s]: 5.190 * Moon: 6 % sunlit, 150° distance * Sun: 151° distance * rough path description: E Canada, E USA, Mexico The occultation path -------------------- * approximate projected width [km]: 44 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 2.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.006", 67°) * approx speed of asteroid's shadow [km/s]: 7.9173 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1732-00076-1 by 695 Bella on 2022 Oct 23 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude .. .. .. -32 0 0 .. .. .... .. .. .. ... .. .. -140 32 0 ... .. .. -140 12 43 .... -139 8 4 -31 0 0 2 34 14.1 2 57 11 -139 33 6 -138 43 17 -139 51 52 -138 25 0 .... -137 25 19 -30 0 0 2 34 13.0 3 56 10 -137 49 8 -137 1 42 -138 7 0 -136 44 16 -0.29 -135 48 52 -29 0 0 2 34 11.2 5 56 8 -136 11 39 -135 26 15 -136 28 44 -135 9 33 -0.31 -134 17 53 -28 0 0 2 34 8.7 7 55 7 -134 39 47 -133 56 8 -134 56 10 -133 40 4 -0.32 -132 51 41 -27 0 0 2 34 5.6 8 54 5 -133 12 48 -132 30 43 -133 28 36 -132 15 12 -0.33 -131 29 45 -26 0 0 2 34 1.9 10 54 4 -131 50 10 -131 9 27 -132 5 26 -130 54 25 -0.33 -130 11 36 -25 0 0 2 33 57.7 11 53 3 -130 31 24 -129 51 54 -130 46 12 -129 37 19 -0.33 -128 56 51 -24 0 0 2 33 53.0 13 53 1 -129 16 6 -128 37 42 -129 30 29 -128 23 31 -0.33 -127 45 12 -23 0 0 2 33 47.9 14 52 0 -128 3 57 -127 26 32 -128 17 58 -127 12 42 -0.33 -126 36 21 -22 0 0 2 33 42.3 16 52 -1 -126 54 39 -126 18 7 -127 8 19 -126 4 37 -0.33 -125 30 3 -21 0 0 2 33 36.3 17 52 -2 -125 47 57 -125 12 14 -126 1 18 -124 59 1 -0.33 -124 26 6 -20 0 0 2 33 29.9 19 51 -3 -124 43 37 -124 8 39 -124 56 42 -123 55 43 -0.33 -123 24 18 -19 0 0 2 33 23.1 20 51 -5 -123 41 29 -123 7 11 -123 54 19 -122 54 30 -0.33 -122 24 30 -18 0 0 2 33 16.0 21 51 -6 -122 41 22 -122 7 42 -122 53 58 -121 55 14 -0.33 -121 26 33 -17 0 0 2 33 8.5 23 50 -7 -121 43 8 -121 10 1 -121 55 30 -120 57 45 -0.33 -120 30 17 -16 0 0 2 33 0.7 24 50 -8 -120 46 36 -120 14 1 -120 58 47 -120 1 57 -0.33 -119 35 37 -15 0 0 2 32 52.6 25 50 -9 -119 51 42 -119 19 36 -120 3 41 -119 7 42 -0.33 -118 42 26 -14 0 0 2 32 44.2 26 50 -10 -118 58 17 -118 26 37 -119 10 6 -118 14 54 -0.33 -117 50 37 -13 0 0 2 32 35.4 28 50 -11 -118 6 16 -117 35 1 -118 17 55 -117 23 26 -0.33 -117 0 6 -12 0 0 2 32 26.4 29 50 -12 -117 15 33 -116 44 41 -117 27 4 -116 33 15 -0.33 -116 10 47 -11 0 0 2 32 17.1 30 50 -13 -116 26 3 -115 55 33 -116 37 27 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6.9 44 52 -24 -107 44 31 -107 16 31 -107 54 57 -107 6 8 -0.34 Latitude Latitude Latitude Latitude -107 0 0 1 47 4 2 29 57.3 45 53 -24 2 8 45 1 25 27 2 24 57 1 9 26 -0.34 -106 0 0 3 21 5 2 29 37.9 46 54 -25 3 43 8 2 59 8 3 59 35 2 42 52 -0.34 -105 0 0 4 57 1 2 29 17.7 48 54 -27 5 19 25 4 34 43 5 36 8 4 18 12 -0.34 -104 0 0 6 34 48 2 28 56.6 50 55 -28 6 57 33 6 12 9 7 14 33 5 55 21 -0.34 -103 0 0 8 14 20 2 28 34.8 51 57 -29 8 37 27 7 51 19 8 54 44 7 34 16 -0.35 -102 0 0 9 55 32 2 28 12.2 53 58 -30 10 19 2 9 32 9 10 36 35 9 14 50 -0.35 -101 0 0 11 38 18 2 27 48.9 55 60 -31 12 2 10 11 14 33 12 20 1 10 56 58 -0.35 -100 0 0 13 22 31 2 27 24.8 56 61 -32 13 46 47 12 58 24 14 4 54 12 40 32 -0.35 - 99 0 0 15 8 4 2 27 0.2 58 63 -33 15 32 42 14 43 34 15 51 7 14 25 26 -0.35 - 98 0 0 16 54 48 2 26 34.9 60 66 -34 17 19 49 16 29 55 17 38 32 16 11 30 -0.35 - 97 0 0 18 42 33 2 26 9.1 61 68 -35 19 7 58 18 17 18 19 26 58 17 58 37 -0.36 - 96 0 0 20 31 11 2 25 42.8 62 71 -36 20 56 59 20 5 33 21 16 17 19 46 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78 2 0 77 29 48 78 14 2 77 17 52 -0.38 59 0 0 77 33 45 2 10 0.7 20 306 -10 77 50 6 77 17 27 78 2 18 77 5 21 -0.38 60 0 0 77 21 3 2 9 59.2 19 307 -10 77 37 38 77 4 30 77 50 0 76 52 14 -0.38 61 0 0 77 7 44 2 9 57.6 19 308 -9 77 24 34 76 50 57 77 37 7 76 38 29 -0.38 62 0 0 76 53 47 2 9 56.0 19 309 -9 77 10 53 76 36 44 77 23 37 76 24 6 -0.38 63 0 0 76 39 9 2 9 54.4 18 310 -9 76 56 31 76 21 51 77 9 28 76 9 0 -0.38 64 0 0 76 23 49 2 9 52.8 18 311 -9 76 41 27 76 6 14 76 54 37 75 53 11 -0.38 65 0 0 76 7 43 2 9 51.1 18 312 -8 76 25 39 75 49 51 76 39 2 75 36 36 -0.38 66 0 0 75 50 50 2 9 49.4 17 313 -8 76 9 4 75 32 40 76 22 39 75 19 11 -0.38 67 0 0 75 33 6 2 9 47.7 17 314 -8 75 51 38 75 14 37 76 5 28 75 0 55 -0.38 68 0 0 75 14 27 2 9 46.0 17 315 -7 75 33 19 74 55 39 75 47 24 74 41 43 -0.38 69 0 0 74 54 52 2 9 44.2 16 316 -7 75 14 4 74 35 44 75 28 23 74 21 33 -0.38 70 0 0 74 34 16 2 9 42.4 16 317 -7 74 53 49 74 14 47 75 8 24 74 0 21 -0.38 71 0 0 74 12 35 2 9 40.6 15 318 -6 74 32 29 73 52 45 74 47 21 73 38 3 -0.38 72 0 0 73 49 45 2 9 38.7 15 319 -6 74 10 3 73 29 33 74 25 11 73 14 35 -0.38 73 0 0 73 25 43 2 9 36.8 14 320 -5 73 46 23 73 5 8 74 1 49 72 49 52 -0.38 74 0 0 73 0 23 2 9 34.9 14 321 -5 73 21 27 72 39 24 73 37 11 72 23 51 -0.38 75 0 0 72 33 39 2 9 33.0 13 322 -5 72 55 9 72 12 16 73 11 12 71 56 25 -0.38 76 0 0 72 5 28 2 9 31.1 13 323 -4 72 27 23 71 43 39 72 43 45 71 27 29 -0.38 77 0 0 71 35 42 2 9 29.2 12 324 -4 71 58 4 71 13 27 72 14 46 70 56 58 -0.38 78 0 0 71 4 16 2 9 27.3 12 325 -3 71 27 5 70 41 33 71 44 8 70 24 44 -0.38 79 0 0 70 31 3 2 9 25.4 11 326 -3 70 54 20 70 7 52 71 11 44 69 50 43 -0.38 80 0 0 69 55 55 2 9 23.5 10 326 -2 70 19 42 69 32 16 70 37 28 69 14 46 -0.39 81 0 0 69 18 45 2 9 21.6 10 327 -1 69 43 2 68 54 37 70 1 10 68 36 45 -0.39 82 0 0 68 39 26 2 9 19.8 9 328 -1 69 4 13 68 14 48 69 22 45 67 56 34 -0.39 83 0 0 67 57 48 2 9 18.1 8 329 0 68 23 6 67 32 39 68 42 1 67 14 3 -0.39 84 0 0 67 13 43 2 9 16.4 7 330 1 67 39 33 66 48 3 67 58 52 66 29 4 -0.40 85 0 0 66 27 1 2 9 14.9 6 331 1 66 53 23 66 0 49 67 13 6 65 41 27 -0.40 86 0 0 65 37 32 2 9 13.4 5 332 2 66 4 27 65 10 49 66 24 35 64 51 3 -0.41 87 0 0 64 45 7 2 9 12.1 4 333 3 65 12 34 64 17 51 65 33 7 63 57 42 -0.43 88 0 0 63 49 35 2 9 11.1 3 334 4 64 17 34 63 21 47 64 38 32 63 1 14 -0.45 89 0 0 62 50 44 2 9 10.2 2 335 5 63 19 16 62 22 24 63 40 39 62 1 28 -0.50 90 0 0 61 48 25 2 9 9.7 1 336 6 62 17 30 61 19 34 62 39 16 60 58 14 -0.65 Uncertainty in time = +/- 3 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 1732-00076-1 * constellation : Pegasus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 03 51.4439 DE: +26 38 18.723 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 03 51.4438 DE: +26 38 18.723 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (695) Bella asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.046 distance from Earth [AU]: 1.23480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 date of fit: 2022 Sep 21 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.029", 0.006", 66.942° remarks: * orbital elements for (695)Bella : Mean anomaly = 17.5812086030 deg Arg. of pericenter = 79.8756919377 deg Long. of node = 275.4886218613 deg Inclination = 13.8432917413 deg Eccentricity = 0.1606047521 Semimajor axis = 2.5402015335 AU Perihelion dist = 2.1322330959 AU Mag: H = 9.11, G = 0.15 Epoch of elements : MJD 59875.09833333 TDT (2022 Oct 23.0983) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512022Sep21,5.19,2022,10,23,2.361407,-0.294170,0.193788,-2.456300,-3.733139,0.002387,-0.001224,0.000001,0.000001 -65.6522,26.7671,140.68,-11.35,False TYC 1732-00076-1,0.06428996,26.6385342,0.00,10.64,0.00,0.0,0,,0.08390770,26.7670949,1.64,0.00,0,0,0 695,Bella,12.01,41.1,1.2348,0,0,-1.305,-26.59,,2.0,0 0,17.3138,2022,10,22,79.8757,275.4886,13.8433,0.16060,2.54020,2.13223,9.12,5.0,0.15 1.372,0.0293,0.0063,67,0.0171,Known errors,-1.00,-1,-1,-1 20221023_0076-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org