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Images - Session 667 (2019-02-23)
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46P/Wirtanen - Comet C/2018 Y1 (Iwamoto) - Comet HAT-P-36 - Exoplanet Host Star HAT-P-18 - Exoplanet Host Star Kepler-447 - Exoplanet Host Star TrES-2 - Exoplanet Host Star TrES-3 - Exoplanet Host Star WASP-135 - Exoplanet Host Star IC 1222 - Spiral Galaxy (ARP 73) NGC 3684 - Spiral Galaxy Variable Stars (photometric monitoring) - AM CVn, SY Cnc, R CrB, CI Cy, S Cyg, SS Cyg, U Gem, AM Her, SS Her, U Mon, GK Per, FG Sge, RR Tau, SU Tau
- Z And, U Her attempts failed due to cloud
Nearby Stars (astrometric monitoring) - HH And, Barnards Star, DX Cnc, 61 Cyg, EV Lac, CN Leo
- Full Night Session, Duration 8.2hr
Session operated in fully automated mode, attended for first half / unattended for second half.
Sky conditions good, once inititally cloud had passed which had delayed start of session
- Main aim of the session was general observing with mix of variable stars , nearby stars , comets and deep sky targets. There was a few remaining Exoplanet host stars baseline observations to make. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 8°C (max) dropping to 0 C min) - CCD Temperature: -20°C & -25C / 83 & 85% av. power) - Notes from 2019-02-23 >>
| 46P/Wirtanen (passing through Ursa
Major) Sun Distance 1.42 AU Earth Distance 0.51 AU (75.8 million km) |
46P/Wirtanen - Detail 10 minute total exposure Stacked image aligned on Comet (stars appear trailed due to motion of comet) |
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| Annotated CCD Image (50% size) 3 x 15s exposure (average combine), 3x3 binning, C Filter 2019-02-23 23:53 UT (#667117-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
CCD Image (100% size, linear scale, cropped) 40 x 15s exposure (average combine), 3x3 binning, C Filter 2019-02-23 23:59 UT (#667117-56) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| 46P/Wirtanen - 2 hours later |
46P/Wirtanen - Detail, 2 hours later 10 minute total exposure |
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| Annotated CCD Image (50% size) 3 x 15s exposure (average combine), 3x3 binning, C Filter 2019-02-24 01:53 UT (#667169-71) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
CCD Image (100% size, linear scale, cropped 39 x 15s exposure (average combine), 3x3 binning, C Filter 2019-02-24 02:00 UT (#667169-208) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| More Images of 46P/Wirtanen | ||
| 46P/Wirtanen - Earlier Image (2018-12-16) (passing through Taurus) Near to point of closest distance from earth Sun Distance 1.06 AU Earth Distance 0.08 AU (11.6 million km) |
46P/Wirtanen - Earlier Detail (2018-12-16) | |
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| CCD Image (50% size, linear scale) 15s exposure (single frame), 3x3 binning, C Filter 2018-12-16 21:03 UT (#641184) 12" LX200R (at f/10.4) + ST-10XME |
CCD Image (50% size, log scale) 31 x 15s exposure (average combine), 3x3 binning, C Filter 2018-12-16 21:03 to 21:16 UT (#641184-222) 12" LX200R (at f/10.4) + ST-10XME (Autoguided on comet using TS 80mm APO + ZWO ASI178MC & PHD2) |
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| C/2018 Y1 (Iwamoto) (passing through Auriga) Sun Distance 1.31 AU Earth Distance 0.53 AU (78.6 million km) |
C/2018 Y1 (Iwamoto) - Detail Aligned on Comet (stars appear trailed due to movement of comet) |
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| CCD Image (50% size, linear scale) 30s exposure (single frame), 3x3 binning, C Filter 2019-02-23 23:00 UT (#667063) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
CCD Image (50% size, log scale) 7 x 30s exposure (average combine), 3x3 binning, C Filter 2019-02-23 23:00 UT (#667063-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| More Images of C/2018 Y1 (Iwamoto) | ||
| C/2018 Y1 (Iwamoto) - Earlier Image
(2019-02-20) (passing through Gemini) Sun Distance 1.30 AU Earth Distance 0.44 AU (65.3 million km) |
C/2018 Y1 (Iwamoto) - Closer View
(2019-02-20) |
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| CCD Image (50% size) 30s exposure (single frame), 3x3 binning, C Filter 2019-02-20 22:53 UT (#665138) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
CCD Image (100% size,cropped) Image details as above |
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HAT-P-36 \ GSC 3020:2221 (Canes Venatici) |
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CCD Image (70% size) 4 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 03:19 UT (#667275-79) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| HAT-P-36 - Earlier Image (2019-02-13) through Astrodon Exoplanet Blue Blocking (BB) Filter |
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| Annotated CCD Image (70% size) 4 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-02-13 22:58 UT (#663245-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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HAT-P-18 (Hercules) |
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Annotated CCD Image (50% size) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2019-02-24 03:27 UT (#667282-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| HAT-P-18 through Astrodon Exoplanet
Blue Blocking (BB) Filter Photometric options for measuring a future transit of HAT-P-18 b are : a) use a single reference star C1 (Undef, GSC 2594:731, V Mag +10.5, B-V ??) with one check star K (Undef, GSC 2594:272, V mag +12.2, B-V ??) or b) ensemble of reference stars C1, C2, C3 C1 (as above), C2 (117, GSC 2594:496, V mag +11.653, B-V 0.912) C3 (131, GSC 2594:102, V mag +13.145, B-V 0.595) C4 (128, GSC 2594:789, V mag +12.848, B-V 0.525) - outside image fov. with one check star K (Undef, GSC 2594:272, V mag +12.2, B-V ??) HAT-P-18: (catalog V mag mag 12.76, B-V ---) |
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| Annotated CCD Image (70% size) 4 x 20s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 03:30 UT (#667287-90) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Frames have been examined to check whether the exposure time
used (20s) is ok or not. 20s exposure in Xo (BB) filter, 3x3 binning, max pixel ~11000 (C1 Star), ~3000 (HAT-P-18) Exposure is much too short. Proposal is to try 60s (3x3 binning) and increase W offset by 1.5' and decrease N Offset by 0.3' to get C4 reference star inside FOV (i.e. new offsets W 1.5', N -2.2') |
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Kepler-447 (Draco) |
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Annotated CCD Image (50% size) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2019-02-24 04:05 UT (#667317-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Kepler-447 (Draco) through Astrodon Exoplanet Blue Blocking (BB) Filter Photometric options for measuring a future transit of Kepler-447 b are : a) use a single reference star C1 (Undef, GSC 3545:843, V Mag +10.6, B-V 1.27) with one check star K (Undef, GSC 3545:1113, V mag +11.8, B-V ??) or b) ensemble of reference stars C1, C2, C3, C4 C1 (as above), C2 (Undef, GSC 3545:461, V mag +11.03, B-V 0.76) C3 (Undef, GSC 3545:127, V mag +10.19, B-V 0.40) C4 (Undef, GSC 3545:569, V mag +11.5, B-V ??) Kepler-447: (catalog V mag mag 10.8/ ?12.5, B-V ??) |
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| Annotated CCD Image (70% size) 5 x 20s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 04:08 UT (#667322-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Frames have been examined to check whether the exposure time
used (20s) is ok or not. 20s exposure in Xo (BB) filter, 3x3 binning, max pixel ~17500 (C1 Star), ~21000 (C2 Star), ~ 26000 (C3 Star) ~4000 (Kepler-447) Opportunity to increase exposure to 30s, N offset to be changed from 3' to 1' to provide better centering of reference stars. |
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TrES-2 Parent Start / GSC 3549:2811 (Draco) |
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Annotated CCD Image (50% size) 3 x 30s exposure (average combine), 3x3 binning, C Filter 2019-02-24 03:06 UT (#667259-62) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| TrES-2 through Astrodon Exoplanet
Blue Blocking (BB) Filter Photometric options for measuring a future transit of TrES-2 b are : a) use a single reference star C1 (108, GSC 3549:2716, V mag +10.792, B-V 1.011) with one check star K ( GSC 3549:2837, mag +12.3) or b) use an essemble of reference stars C1 to C3 C1 (as above), C2 (121, GSC 3550:628, mag +12.140, B-V 1.066), C3 (128, GSC 3549:2829, mag +12.811, B-V, 1.044) Alt Check Star K2 (GSC 3549:2776, mag +12.1) TrES-2: (catalog mag +11.41, B-V 0.62) (N.B. other photometric stars only visible in by adjusting the TrES-2 N/W offsets C4 (116, GSC 3549:2704, mag +11.561, B-V, 0.963) C5 (120, GSC 3549:2815, mag +12.022, B-V, 0.624) |
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| Annotated CCD Image (70% size) 5 x 20s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 03:08 UT (#667263-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Frames have been examined to check whether the exposure time
used (20s) is ok or not. 20s exposure in Xo (BB) filter at 3x3 binning has max pixel value of ~ 14000 presenting an opportunity to take a slightly longer exposure Proposal is to repeat Xo exposures at 30s. |
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TrES-3 (Hercules) |
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Annotated CCD Image (50% size) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2019-02-24 04:45 UT (#667354-58) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| TrES-3 through Astrodon Exoplanet Blue Blocking (BB) Filter |
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| Annotated CCD Image (70% size) 4 x 20s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 04:48 UT (#667360-63) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Photometric options for measuring
a future transit of TrES-3 b are : a) use a single reference star C2 (GSC 3089:995): V Mag +11.792 (0.012), AUID 000-BJP-977) with one check star K (GSC 3089:741): V Mag +13.001 (0.010), AUID 000-BJP-974) or b) adjust target pointing and use wider ensemble of reference stars C1, C2, C3 C1 (GSC 2620:812, V Mag +11.411 (0.022) , AUID 000-BJP-972), C2 (GSC 3089:995, V Mag +11.792 (0.012), AUID 000-BJP-977) C3 (GSC 2620:301, V Mag +12.589 (0.010), AUID 000-BJP-971 with one check star K (GSC 3089:741, V Mag +13.001 (0.010), AUID 000-BJP-974) Xo (BB) frames were been examined to check whether the exposure time used (20s) and FOV are ok or not. WIth 20s exposure, 3x3 binning, max pixel values are ~5000 (C2 Star), ~3000 (TrES-3) There is opportunity to improve photometric signal by using a longer exposure time of 30 or 45s. Frames used a Target Offsets of N 3.0 arc min, W 0.0 arc min. The north offset have been a planning mistake since C1 and C2 references stars both lie south of the FOV. There is opportunity to modify target pointing offsets to N -3.0 arc min, W 1.5 arc min in order to get more reference stars into FOV during future attempts. |
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TrES-3 - Earlier Image (2007-08-13) |
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Annotated CCD Image 3 x 60 sec exposure (average combine), 2x2 binning, C Filter 2007-08-13 23:02h UT (#203194-98) 8" LX200 Classic + ST-7E |
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WASP-135 (Hercules) |
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Annotated CCD Image (50% size) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2019-02-24 03:38 UT (#667295-97) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| WASP-135 through Astrodon Exoplanet
Blue Blocking (BB) Filter Photometric options for measuring a future transit of WASP-135 b are : a) use a single reference star C1 (Undef, GSC 2607:127, V Mag +10.26, B-V 1.27) with one check star K (Undef, GSC 2089:272, V mag +12.5, B-V ??) or b) ensemble of reference stars C1, C2, C3 C1 (as above), C2 (Undef, GSC 2089:1673, V mag +12.0, B-V ??) C3 (Undef, GSC 2089:1627, V mag +12.3, B-V ??) WASP-135: (catalog V mag mag 13.3, B-V 0.97) |
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| Annotated CCD Image (70% size) 5 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-02-24 03:42 UT (#667299-303) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Frames have been examined to check whether the exposure time
used (30s) is ok or not. 30s exposure in Xo (BB) filter, 3x3 binning, max pixel ~29000 (C1 Star), ~3000 (HAT-P-18) Exposure is too short to reduce noise associated with Wasp-135 magnitude measurement, but can not be increased unless the bright star C1 is dropped from reference list. |
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| IC 1222 (Hercules) Aliases ARP 73, PGC 58544 |
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| CCD Image (50% size) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2019-02-23 22:37 UT (#667048-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| IC 1222 - Detail |
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| CCD Image (100% size, linear scale, cropped) Image details as above |
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| Negative CCD Image (100% size, linear scale, cropped) Image details as above |
| IC 1222 - Earlier Image (2019-02-06) |
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| CCD Image (100% size, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2019-02-06 06:21 UT (#658004-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| IC 1222 - Earlier Image (2007) |
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| CCD Image (100% size) 3 x 3 min exposure (average combine), 2x2 binning, C Filter 2007-10-22 20:11hUT (#224094-96) 8" LX200 Classic (at f/6.3) + ST-7E |
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| NGC 3684 (Leo) Ast. Now Deep Sky Challenge Object, Mar 2019 |
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| CCD Image (50% size, linear scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2019-02-23 22:04 UT (#667024-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 3684 - Detail |
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| CCD Image (100% size, square root scale, cropped) Image details as above |
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| This Web Page: | Images - Session 667 (2019-01-23) |
| Last Updated : | 2024-06-13 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
