Grazing Occultation of 661SF0 Magnitude 4.5 [Red = 4.3] v R661 = 71 Tauri (V777) Date: 2016 Dec 13 1h 31m, to 2016 Dec 13 1h 44m Nominal site altitude 100m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o 15 0 0 61 13 57.7 1 30 39 31 244 1.66 172.4 181.48 -23.52S 15 30 0 61 11 7.0 1 31 1 31 245 1.68 172.5 181.52 -23.56S 16 0 0 61 8 11.9 1 31 23 31 245 1.69 172.5 181.56 -23.60S 16 30 0 61 5 12.2 1 31 45 30 246 1.71 172.6 181.60 -23.64S 17 0 0 61 2 8.1 1 32 6 30 246 1.73 172.6 181.64 -23.68S 17 30 0 60 58 59.5 1 32 28 30 247 1.74 172.6 181.68 -23.72S 18 0 0 60 55 46.4 1 32 49 30 248 1.76 172.7 181.71 -23.75S 18 30 0 60 52 28.8 1 33 11 29 248 1.78 172.7 181.75 -23.79S 19 0 0 60 49 6.7 1 33 32 29 249 1.80 172.8 181.79 -23.83S 19 30 0 60 45 40.1 1 33 53 29 249 1.81 172.8 181.83 -23.87S 20 0 0 60 42 9.0 1 34 14 29 250 1.83 172.8 181.87 -23.91S 20 30 0 60 38 33.4 1 34 35 28 251 1.85 172.9 181.91 -23.95S 21 0 0 60 34 53.4 1 34 55 28 251 1.87 172.9 181.94 -23.98S 21 30 0 60 31 8.8 1 35 16 28 252 1.89 172.9 181.98 -24.02S 22 0 0 60 27 19.8 1 35 36 28 252 1.91 173.0 182.02 -24.06S 22 30 0 60 23 26.3 1 35 57 27 253 1.93 173.0 182.05 -24.09S 23 0 0 60 19 28.4 1 36 17 27 254 1.96 173.1 182.09 -24.13S 23 30 0 60 15 26.0 1 36 37 27 254 1.98 173.1 182.13 -24.17S 24 0 0 60 11 19.2 1 36 57 27 255 2.00 173.1 182.16 -24.20S 24 30 0 60 7 7.9 1 37 16 26 255 2.02 173.2 182.20 -24.24S 25 0 0 60 2 52.2 1 37 36 26 256 2.05 173.2 182.24 -24.28S 25 30 0 59 58 32.0 1 37 55 26 256 2.07 173.2 182.27 -24.31S 26 0 0 59 54 7.4 1 38 15 25 257 2.10 173.3 182.31 -24.35S 26 30 0 59 49 38.4 1 38 34 25 258 2.12 173.3 182.34 -24.38S 27 0 0 59 45 4.9 1 38 53 25 258 2.15 173.3 182.38 -24.42S 27 30 0 59 40 27.0 1 39 12 25 259 2.18 173.4 182.41 -24.45S 28 0 0 59 35 44.7 1 39 30 24 259 2.20 173.4 182.45 -24.49S 28 30 0 59 30 58.0 1 39 49 24 260 2.23 173.4 182.48 -24.52S 29 0 0 59 26 6.9 1 40 7 24 260 2.26 173.5 182.52 -24.56S 29 30 0 59 21 11.5 1 40 26 24 261 2.29 173.5 182.55 -24.59S 30 0 0 59 16 11.6 1 40 44 23 261 2.32 173.5 182.58 -24.62S 30 30 0 59 11 7.4 1 41 2 23 262 2.35 173.6 182.62 -24.66S 31 0 0 59 5 58.9 1 41 19 23 263 2.39 173.6 182.65 -24.69S 31 30 0 59 0 46.0 1 41 37 22 263 2.42 173.6 182.68 -24.72S 32 0 0 58 55 28.7 1 41 55 22 264 2.45 173.7 182.72 -24.76S 32 30 0 58 50 7.2 1 42 12 22 264 2.49 173.7 182.75 -24.79S 33 0 0 58 44 41.3 1 42 29 22 265 2.53 173.7 182.78 -24.82S 33 30 0 58 39 11.2 1 42 46 21 265 2.56 173.8 182.81 -24.85S 34 0 0 58 33 36.8 1 43 3 21 266 2.60 173.8 182.85 -24.89S 34 30 0 58 27 58.1 1 43 19 21 266 2.64 173.8 182.88 -24.92S 35 0 0 58 22 15.2 1 43 36 20 267 2.68 173.9 182.91 -24.95S 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 2 meters [CHARM/CADARS, 3 measures] 661 is variable: 661 = V0777 Tau, 4.73, range 0.02, B, Type DSCTC, Period 0.16 days 661 is triple: AC 4.0 12.4 10.4" 147.0 (DRS 38) Graze path of C approximately 25.8 km north, and 8.1 secs later compared to A - refer to graze profile for exact distances AB 4.5 12.0 132" 153.7 (BUP 59) Graze path of B approximately 342.9 km north, and 76.9 secs later compared to A - refer to graze profile for exact distances Librations Long -0.07 Lat +7.26 P +182.25 D +7.51 Illumination of moon 98%+ Elongation of Moon 165 Vertical Profile Scale approx. 2.58 km/arcsec at mean distance of moon Horizontal Scale Factor 1.96 deg/min At longitude 25.00: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -28.3 2.1 3.4 4.1 4.5 4.8 4.9 5.0 -26.3 2.1 3.4 4.1 4.5 4.8 4.9 5.0 -24.3 2.1 3.4 4.1 4.5 4.8 4.9 5.0 -22.3 2.1 3.4 4.1 4.5 4.8 4.9 5.0 -20.3 2.1 3.4 4.1 4.5 4.8 4.9 5.0 ------------------------------------------------------------------------------ Double star catalogue details WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 04263+1537BUP 59 1906 2000 8 149 153 138.4 132.6 4.50 11.99 F0V +114-032 +008-012 +15 625 N 042620.74+153705.8 ------------------------------------------------ Interferometric catalogue entries 042620.74+153705.8 Hyades vB 141 BUP 59A HD 28052 HIP 20713 04263+1537 N Date PA Sep M1 M2 1976.039 . . < 0.033 . . . . . 552 20 3.8 1 Hrt1984 Sc 1976.8602 . . < 0.035 . . . . . 552 20 3.8 1 McA1978c Sc 1976.9230 . . < 0.035 . . . . . 552 20 3.8 1 McA1978c Sc 1977.0868 . . < 0.035 . . . . . 552 20 3.8 1 McA1978c Sc 1979.036 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc 1979.6967 V243.4 . . . . . . . . 1 Rad1982b O 1979.771 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc 1980.156 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc 1980.5949 V173.2 . 0.0089 0.0003 . . 3.59 0.11 700 70 . 1 Pts1981a O 1980.5949 V173.2 . 0.0089 0.0003 . . 3.61 0.14 450 50 . 1 Pts1981a O 1980.718 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc 1982.7611 . . < 0.030 . . . . . 3.8 1 Msn1996b Sc 1982.847 . . < 0.078 . . . . . 550 1.0 1 Tok1983 Ig 1983.0505 . . < 0.030 . . . . . 549 22 3.8 1 Msn1996b Sc 1983.9311 . . < 0.06 . . . . . 550 3 2.0 1 Bnu1984 S 1988.170 . . < 0.038 . . . . . 549 22 3.6 1 McA1993 Sc 1991.25 . . < 0.1 . 4.55 . . . 511 222 0.3 1 HIP1997e Hh 1991.8992 . . < 0.030 . . . . . 549 22 3.8 2 Msn1993a Sc 1996.022 . . < 0.05 . . . >3.6 . 2200 400 5.1 1 Pat1998 Si 2005.8687 . . < 0.036 . . . . . 550 24 3.8 1 Msn2009 Su 042620.74+153705.8 HR 1394 BUP 59 HD 28052 HIP 20713 04263+1537 N Date PA Sep M1 M2 1991.56 153.0 . 132.25 . 4.504 0.009 12.054 0.186 530 100 1.4 1 TYC2002 Ht 1991.56 . . . . 4.780 0.014 12.544 0.211 430 90 1.4 1 TYC2002 Ht ------------------------------------------------ AAVSO Variable star entry Variable identifier Type Max Min Ph Epoch Period V0777 Tau DSCTC 4.73 ( 0.02 B 0.16 ------------------------------------------------------------------------------ Results of Observer Scan UT Site Long. Lat. Dist. h m s Ähtäri 24.1 62.6 253km 1 37 0 Artjärvi Tähtikallio 26.2 60.7 91km 1 38 23 Forssa 23.6 60.8 60km 1 36 42 Hämeenlinna 24.4 61.0 92km 1 37 14 Hamina 27.2 60.6 90km 1 39 0 Hartola 26.0 61.6 178km 1 38 15 Helsinki Kaivopuisto 25.0 60.2 11km 1 37 34 Imatra 28.8 61.2 184km 1 39 59 Järvenpää 25.1 60.5 47km 1 37 40 Joensuu Jakokoski 30.0 62.7 360km 1 40 43 Jyväskylä Rihlaperä 25.7 62.2 242km 1 38 3 Kangasala 24.0 61.4 129km 1 36 57 Kemiö 22.8 60.1 22km 1 36 8 Kokkola 23.1 63.8 373km 1 36 22 Kuopio Huuhanmäki 27.6 62.9 339km 1 39 17 Lahti Pirttiharju 25.6 61.0 108km 1 37 59 Lappeenranta 28.2 61.1 157km 1 39 37 Loimaa 23.1 60.8 56km 1 36 19 Loviisa 26.2 60.5 62km 1 38 23 Maarianhamina 19.9 60.1 65km 1 34 12 Merikarvia 21.5 61.9 143km 1 35 16 Mikkeli Kiiskinmäki 27.2 61.7 208km 1 39 2 Mäntyharju 26.9 61.4 174km 1 38 48 Nilsiä 28.1 63.2 379km 1 39 34 Pirkkola 24.9 60.2 18km 1 37 32 Pori 21.8 61.5 108km 1 35 28 Porvoo 25.7 60.4 46km 1 38 3 Rautalampi 26.7 62.6 292km 1 38 41 Salo 23.1 60.4 8km 1 36 22 Savonlinna 28.9 61.9 253km 1 40 3 Siuntio 24.2 60.2 1km 1 37 4 Tallinna 24.8 59.4 73km 1 37 26 Tampere Kauppi 23.8 61.5 138km 1 36 48 Turku Isoheikkilä 22.2 60.5 3km 1 35 46 Ulvila Vesitorni 21.9 61.4 104km 1 35 33 Vaasa Sundom 21.6 63.0 270km 1 35 19 Vantaa 25.0 60.3 28km 1 37 35 Varkaus 27.9 62.3 283km 1 39 26