|
|
|
|
|
|
| |
|
All times UT unless otherwise noted |
SpectacularApril 9th eta Geminorum Graze in Dixon, California |
 |
Observing Site
|
Graze Prediction from WinOCCULT Grazing Occultation of 946DM3 Magnitude 3.5 [Red = 2.5] V R946 = Propus = eta Geminorum Date: 2011 Apr 10 4h 38m, to 2011 Apr 10 5h 16m Nominal site altitude 34m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' o ' h m s Alt Alt Az o o o -125 0.00 40 1.37 4 37 42 46 262 0.98 15.9 15.88 14.02N -124 0.00 39 31.22 4 39 25 45 264 1.02 16.0 15.98 14.11N -123 0.00 39 0.58 4 41 8 43 265 1.06 16.1 16.08 14.21N -122 0.00 38 29.48 4 42 49 42 266 1.10 16.2 16.17 14.31N -121 45.00 38 21.64 4 43 14 42 267 1.11 16.2 16.19 14.33N -121 0.00 37 57.97 4 44 29 41 268 1.14 16.2 16.25 14.39N -120 0.00 37 26.07 4 46 7 40 269 1.18 16.3 16.32 14.46N -119 0.00 36 53.82 4 47 44 39 271 1.23 16.4 16.39 14.53N -118 0.00 36 21.28 4 49 19 38 272 1.28 16.4 16.45 14.59N -117 0.00 35 48.47 4 50 52 37 273 1.34 16.5 16.50 14.64N -116 0.00 35 15.44 4 52 23 36 274 1.39 16.5 16.54 14.68N -115 0.00 34 42.23 4 53 52 34 275 1.46 16.6 16.56 14.70N Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. Projected diameter of star 24 meters [CHARM/CADARS, 12 measures] 946 is variable:
946 = eta Gem, 3.15 to 3.9, V, Type SRA+EA, Period 232.9 days, Phase 1 %
946 is double: AB 3.5 6.2 1.6" 253.5 (BU 1008) Graze path of B 1.83 km north, and 2.7 secs earlier compared to A Librations Long -8.26 Lat +1.31
P +16.15 D -3.34
Illumination of moon 36%+
Elongation of Moon 74
Vertical Profile Scale 2.10 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.86 deg/min
At longitude -105.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
10.6 5.6 7.0 7.8 8.3 8.6 8.9 9.0
12.6 5.6 7.0 7.8 8.3 8.6 8.9 9.1
14.6 5.6 7.0 7.8 8.3 8.7 8.9 9.1
16.6 5.6 7.1 7.8 8.3 8.7 8.9 9.1
18.6 5.6 7.1 7.9 8.4 8.7 8.9 9.1
------------------------------------------------------------------------------ Double star catalogue details WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 06149+2230BU 1008 1881 2008 101 300 257 1.1 1.8 3.52 6.15 M3.5I-II +22 1241 NOD 061452.69+223024.6 ------------------------------------------------ Interferometric catalogue entries 061452.69+223024.6 ADS 4841 BU 1008AB HD 42995 HIP 29655 06149+2230 N O
Date PA Sep M1 M2
1976.8604 263.8 0.2 1.584 0.010 . . . . 552 20 3.8 1 McA1978b Sch
1977.1799 269.4 . 1.601 . . . . . 552 20 2.1 1 McA1982b Sch
1991.25 260.6 . 1.705 . 3.38 . 6.07 . 550 0.3 1 HIP1997a Thp
1991.25 . . . . 3.55 . 6.25 0.01 505 97 0.3 1 Fab2000a Thp
1991.25 . . . . 5.49 . 7.46 0.01 435 70 0.3 1 Fab2000a Thp
1991.93 261.9 . 1.759 . 3.52 . 6.15 . 530 100 1.4 1 TYC2000a Tty
2004.241 258.5 0.3 1.765 0.022 . . . . 530 57 1.0 1 Sca2005a Spe
2005.111 257.2 0.3 1.703 0.012 . . . . 644 70 1.0 1 Sca2007a Spe
2006.128 256.2 2. 1.65 0.06 . . . . 700 200 1.0 1 Orl2007 Spe
2008.243 257.2 0.3 1.787 0.009 . . . . 530 57 1.0 1 Pru2010 Spe
061452.70+223024.6 eta Gem BU 1008A HD 42995 HIP 29655 06149+2230 N
Date PA Sep M1 M2
1975.9566 . . < 0.033 . . . . . 517 20 3.8 1 McA1978c Sch
1977.0870 . . < 0.035 . . . . . 552 20 3.8 1 McA1978c Sch
1979.7709 . . < 0.033 . . . . . 470 3.8 1 McA1981b Sch
1982.1679 . . < 0.028 . . . . . 550 ? 3.6 1 Bag1984b Spe
1982.1706 . . < 0.028 . . . . . 550 ? 3.6 1 Bag1984b Spe
1983.9340 . . < 0.06 . . . . . 550 3 2.0 1 Bnu1984 Spe
1988.807 . . < 0.05 . . . . . 2.1 1 Iso1991 Spe
1988.8087 . . < 0.05 . . . . . 2.1 1 Iso1990b Spe
1988.8114 . . < 0.05 . . . . . 2.1 1 Iso1990b Spe
1991.25 . . . . 3.382 0.014 6.070 0.149 511 222 0.3 1 HIP1997f Thp
------------------------------------------------ AAVSO Variable star entry Variable identifier Type Max Min Ph Epoch Period
eta Gem SRA+EA 3.15 3.9 V 2437725.0000 232.9
------------------------------------------------------------------------------
Results of Observer Scan UT
Site Long. Lat. Dist. h m s
BREIT IDEAS Obs - 12inch LX200 -121.7 37.1 113km 4 43 19
|
|
Profile
|
| Results |
 |
 |
 |
 |
 |
Place name eta Gem Graze - Dixon, CA Email address breit_ideas@hotmail.com Representative Derek C Breit TA CED 31 305 -1215029.2 +382420.9 84 12 M OA D. Breit 2011 410 44228.664R 946 DDG EG G0.04 1 0.300T111 AA 2011 410 44244.713R 946 RDG EG G0.04 1 0.467T111 AA 2011 410 44245.147R 946 DDG EG G0.04 1 0.267T111 AA 2011 410 44245.581R 946 RDG EG G0.04 1 0.334T111 AA 2011 410 44246.515R 946 BDG EG G0.04 1 0.800T111 AA 2011 410 44248.517R 946 DDG EG G0.04 1 0.367T111 AA 2011 410 44249.051R 946 RDG EG G0.04 1 0.501T111 AA 2011 410 44250.286R 946 DDG EG G0.04 1 0.500T111 AA 2011 410 44316.046R 946 FDG EG G0.04 1 0.467 111 AA 2011 410 44320.216R 946 RDG EG G0.04 1 1.201T111 AA 2011 410 44324.788R 946 DDG EG G0.04 1 0.734T111 AA 2011 410 44325.789R 946 RDG EG G0.04 1 0.634T111 AA 2011 410 44327.190R 946 DDG EG G0.04 1 0.501T111 AA 2011 410 44331.194R 946 RDG EG G0.04 1 0.701T111 AA 2011 410 44332.796R 946 DDG EG G0.04 1 0.133T111 AA 2011 410 44357.788R 946 RDG EG G0.04 1 1.068T111 AA |
| See the Video.. Target is obvious.. Click HERE 6MB |
This site was last updated 10/21/14
© Copyright, Derek C Breit. All rights reserved.
