Grazing Occultation of 1925SB1 Magnitude 1.0 [Red = 1.1] v R1925 = Spica = alpha Virginis Date: 2024 Nov 27 10h 54m, to 2024 Nov 27 11h 3m Nominal site altitude 0m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o -108 0 0 33 39 25.2 10 53 36 2 105 23.34 212.5 192.21 12.84S -107 45 0 33 36 0.2 10 53 39 3 105 21.36 212.5 192.27 12.90S -107 30 0 33 32 33.1 10 53 42 3 106 19.69 212.6 192.33 12.96S -107 15 0 33 29 3.9 10 53 46 3 106 18.26 212.7 192.38 13.02S -107 0 0 33 25 32.5 10 53 49 3 106 17.02 212.7 192.44 13.08S -106 45 0 33 21 59.0 10 53 52 4 106 15.93 212.8 192.50 13.13S -106 30 0 33 18 23.4 10 53 56 4 106 14.97 212.8 192.56 13.19S -106 15 0 33 14 45.6 10 54 0 4 106 14.12 212.9 192.62 13.25S -106 0 0 33 11 5.7 10 54 3 4 106 13.36 213.0 192.68 13.31S -105 45 0 33 7 23.5 10 54 7 5 107 12.67 213.0 192.74 13.37S -105 30 0 33 3 39.1 10 54 11 5 107 12.05 213.1 192.80 13.43S -105 15 0 32 59 52.5 10 54 16 5 107 11.48 213.1 192.86 13.49S -105 0 0 32 56 3.7 10 54 20 5 107 10.96 213.2 192.92 13.55S -104 45 0 32 52 12.7 10 54 24 5 107 10.49 213.3 192.98 13.62S -104 30 0 32 48 19.3 10 54 29 6 107 10.05 213.3 193.04 13.68S -104 15 0 32 44 23.7 10 54 34 6 107 9.65 213.4 193.11 13.74S -104 0 0 32 40 25.8 10 54 39 6 108 9.27 213.4 193.17 13.80S -103 45 0 32 36 25.6 10 54 43 6 108 8.93 213.5 193.23 13.86S -103 30 0 32 32 23.1 10 54 49 7 108 8.60 213.6 193.29 13.93S -103 15 0 32 28 18.2 10 54 54 7 108 8.30 213.6 193.35 13.99S -103 0 0 32 24 10.9 10 54 59 7 108 8.02 213.7 193.42 14.05S -102 45 0 32 20 1.3 10 55 5 7 108 7.75 213.8 193.48 14.11S -102 30 0 32 15 49.3 10 55 10 8 108 7.50 213.8 193.54 14.18S -102 15 0 32 11 34.9 10 55 16 8 109 7.27 213.9 193.61 14.24S -102 0 0 32 7 18.1 10 55 22 8 109 7.05 213.9 193.67 14.31S -101 45 0 32 2 58.8 10 55 28 8 109 6.84 214.0 193.74 14.37S -101 30 0 31 58 37.1 10 55 34 9 109 6.64 214.1 193.80 14.44S -101 15 0 31 54 12.9 10 55 41 9 109 6.45 214.1 193.87 14.50S -101 0 0 31 49 46.2 10 55 47 9 109 6.27 214.2 193.93 14.57S -100 45 0 31 45 16.9 10 55 54 9 109 6.10 214.3 194.00 14.63S -100 30 0 31 40 45.2 10 56 1 10 110 5.94 214.3 194.06 14.70S -100 15 0 31 36 10.9 10 56 7 10 110 5.79 214.4 194.13 14.77S -100 0 0 31 31 34.0 10 56 15 10 110 5.64 214.5 194.20 14.83S - 99 45 0 31 26 54.6 10 56 22 10 110 5.50 214.5 194.26 14.90S - 99 30 0 31 22 12.5 10 56 29 11 110 5.36 214.6 194.33 14.97S - 99 15 0 31 17 27.8 10 56 37 11 110 5.24 214.7 194.40 15.03S - 99 0 0 31 12 40.5 10 56 44 11 111 5.11 214.7 194.47 15.10S - 98 45 0 31 7 50.5 10 56 52 11 111 4.99 214.8 194.54 15.17S - 98 30 0 31 2 57.8 10 57 0 12 111 4.88 214.9 194.60 15.24S - 98 15 0 30 58 2.4 10 57 9 12 111 4.77 214.9 194.67 15.31S - 98 0 0 30 53 4.3 10 57 17 12 111 4.67 215.0 194.74 15.38S - 97 45 0 30 48 3.4 10 57 26 12 111 4.57 215.1 194.81 15.45S - 97 30 0 30 42 59.7 10 57 34 13 111 4.47 215.2 194.88 15.52S - 97 15 0 30 37 53.3 10 57 43 13 112 4.37 215.2 194.95 15.59S - 97 0 0 30 32 44.0 10 57 52 13 112 4.28 215.3 195.02 15.66S - 96 45 0 30 27 31.9 10 58 1 13 112 4.20 215.4 195.09 15.73S - 96 30 0 30 22 17.0 10 58 11 14 112 4.11 215.4 195.17 15.80S - 96 15 0 30 16 59.1 10 58 20 14 112 4.03 215.5 195.24 15.87S - 96 0 0 30 11 38.3 10 58 30 14 112 3.95 215.6 195.31 15.95S - 95 45 0 30 6 14.7 10 58 40 14 112 3.88 215.7 195.38 16.02S - 95 30 0 30 0 48.0 10 58 50 15 113 3.80 215.7 195.45 16.09S - 95 15 0 29 55 18.4 10 59 1 15 113 3.73 215.8 195.53 16.16S - 95 0 0 29 49 45.8 10 59 11 15 113 3.66 215.9 195.60 16.24S - 94 45 0 29 44 10.1 10 59 22 16 113 3.59 215.9 195.68 16.31S - 94 30 0 29 38 31.4 10 59 33 16 113 3.53 216.0 195.75 16.39S - 94 15 0 29 32 49.6 10 59 44 16 113 3.47 216.1 195.83 16.46S - 94 0 0 29 27 4.7 10 59 55 16 113 3.40 216.2 195.90 16.54S - 93 45 0 29 21 16.7 11 0 7 17 114 3.34 216.2 195.98 16.61S - 93 30 0 29 15 25.5 11 0 18 17 114 3.29 216.3 196.05 16.69S - 93 15 0 29 9 31.2 11 0 30 17 114 3.23 216.4 196.13 16.76S - 93 0 0 29 3 33.6 11 0 42 17 114 3.17 216.5 196.20 16.84S - 92 45 0 28 57 32.8 11 0 54 18 114 3.12 216.6 196.28 16.92S - 92 30 0 28 51 28.7 11 1 7 18 114 3.07 216.6 196.36 17.00S - 92 15 0 28 45 21.3 11 1 20 18 115 3.02 216.7 196.44 17.07S - 92 0 0 28 39 10.6 11 1 33 19 115 2.97 216.8 196.51 17.15S - 91 45 0 28 32 56.5 11 1 46 19 115 2.92 216.9 196.59 17.23S - 91 30 0 28 26 39.1 11 1 59 19 115 2.87 216.9 196.67 17.31S - 91 15 0 28 20 18.2 11 2 13 19 115 2.83 217.0 196.75 17.39S - 91 0 0 28 13 53.9 11 2 27 20 115 2.78 217.1 196.83 17.47S - 90 45 0 28 7 26.1 11 2 41 20 115 2.74 217.2 196.91 17.55S - 90 30 0 28 0 54.9 11 2 55 20 116 2.69 217.3 196.99 17.63S - 90 15 0 27 54 20.1 11 3 9 21 116 2.65 217.3 197.07 17.71S - 90 0 0 27 47 41.7 11 3 24 21 116 2.61 217.4 197.15 17.79S Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. The path is adjusted for the effects of refraction at low moon altitudes. Projected diameter of star 1 meters [CHARM/CADARS, 6 measures] 1925 is variable: 1925 = alf Vir, 0.96 to 1.00, V, Type ELL+BCEP, Period 4.0145 days, Phase 75% 1925 is multiple: Aa,Ab 1.3 4.5 0.10" (OCC 418) Graze path of Ab approximately 0.1 km south, and 0.2 secs earlier compared to Aa - refer to graze profile for exact distances Aa,Ac 1.3 7.5 0.50" (OCC 418) Graze path of Ac approximately 0.6 km south, and 0.8 secs earlier compared to Aa - refer to graze profile for exact distances AB 1.0 12.0 154" 33.0 (BUP 150) Graze path of B approximately 274.6 km south, and 10.3 secs earlier compared to A - refer to graze profile for exact distances AC 1.0 10.5 368" 60.8 (BUP 150) Graze path of C approximately 591.2 km south, and 357.2 secs later compared to A - refer to graze profile for exact distances Librations Long +0.77 Lat +2.36 P +194.51 D +2.36 Illumination of moon 13%- Elongation of Moon 41 Vertical Profile Scale approx. 1.88 km/arcsec at mean distance of moon Horizontal Scale Factor 1.76 deg/min At longitude -99.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 11.1 6.1 7.6 8.4 8.9 9.3 9.5 9.7 13.1 6.2 7.6 8.4 9.0 9.3 9.6 9.8 15.1 6.2 7.7 8.5 9.0 9.4 9.6 9.9 17.1 6.2 7.7 8.5 9.0 9.4 9.7 9.9 19.1 6.3 7.7 8.5 9.1 9.4 9.7 9.9 ------------------------------------------------------------------------------ Double star catalogue details Star is a Kepler2 target star. EPIC_ID = 212573842 ------------------------------------------------ WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 13252-1110OCC 418Aa,Ab 1975 1995 0 -1 -1 0.1 -1.0 1.3 4.5 B1III- -042-031 -10 3672 N 132511.58-110940.4 13252-1110OCC 418Aa,Ac 1975 1975 0 -1 -1 0.5 0.5 1.3 7.5 B1III- -042-031 -10 3672 N 132511.58-110940.4 13252-1110BUP 150AB 1879 2010 5 33 33 144.4 151.9 0.98 12.0 B1III-+B2 -042-031 -10 3672 N 132511.58-110940.4 13252-1110BUP 150AC 1879 2010 3 62 61 359.8 367.3 0.98 10.5 B1III-+B2 -042-031 N 132511.58-110940.4 ------------------------------------------------ Interferometric catalogue entries 132511.58-110940.4 HR 5056 = alp Vir OCC 418Aa,Ab HD 116658 HIP 65474 13252-1110 N Date PA Sep M1 M2 1975. V225. . 0.05 . 1.3 . 4.5 . . 1 OCC2002 O 1988.166 . . < 0.038 . . . . . 549 22 3.6 1 McA1993 Sc 1989.3938 . . < 0.05 . . . . . 2.1 1 Iso1992 S 1991.25 . . < 0.1 . 0.89 . . . 511 222 0.3 1 HIP1997e Hh 1995.2090 V237. . . . . . . . 1260 290 1.5 1 Rch1996 O 2002.2408 . . < 0.13 . . . . . 900 340 3.6 1 Rbr2007 A 2002.2409 . . < 0.08 . . . . . 900 340 3.6 1 Rbr2007 A 132511.58-110940.4 HR 5056 = alp Vir OCC 418Aa,Ac HD 116658 HIP 65474 13252-1110 N Date PA Sep M1 M2 1975. V180. . 0.5 . 1.3 . 7.5 . . 1 OCC2002 O ------------------------------------------------ AAVSO Variable star entry Variable identifier Type Max Min Ph Epoch Period alf Vir ELL+BCEP 0.96 1.00 V 2419530.4900 4.0145000 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s