David's Astronomy Pages CCD Images - Session 671 (2019-03-04)

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Session Notes

21P/Giacobini-Zinner - Comet NGC 2301 - Open Cluster (H VI-27) NGC 2335 - Open Cluster (H VIII-32) C/2018 Y1 (Iwamoto) - Comet TrES-3 - Exoplanet Host Star Galaxies in TrES-3 Star Field (PGC 2101630 et al) TrES-3 b - Exoplanet Transit (Dry Run)     Photometric Monitoring - Variables   - SY Cnc, CI Cyg, SS Her, CY Lyr, CN Ori,  FO Ori, NV Ori,  SY Tau (R CrB, S Cyg, SS Cyg, AM Her, U Her, U Mon, V Sge attempts failed due to cloud)     Astrometric Monitoring - Nearby Stars  - Barnards Star, 61 Cyg, CN Leo

- Night session,  Duration 8.6hr Session operated in  fully automated mode, and monitored over remote connection. - Main aim of the session was general observing with mix of variable stars, nearby stars, comets and deep sky targets.  An attempted Exoplanet Transit run failed as the date was on night too early, it nevertheless provided a useful dry run.     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  -3°C (min) - CCD Temperature:  -25°C  (68% av. power) - Notes from 2019-03-04 >>

21P/Giacobini-Zinner - Comet

21P/Giacobini-Zinner, attempted observation  (passing through Canis Major) Sun Distance 2.35 AU Earth Distance 1.87 AU (280.2 million km) No sign of comet at it's expected position, shown below by white circle Bright star to bottom left is HIP 29895, mag +5.1

CCD Image (50% size, linear scale) 6 x 30s exposure (average combine), 3x3 binning, C Filter 2019-03-04 21:09 UT (#671003-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

21P/Giacobini-Zinner - Previous Image (2018-09-15) (Passing through starfield in Gemini) Sun Distance 1.02 AU Earth Distance 0.40 AU (59.1 million km)

CCD Image (50% size, linear scale) 30 sec exposure (single frame), 3x3 binning, C Filter 2018-09-15 01:18 UT (#629521) 12" LX200R  (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 [ Full Size Image ]

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NGC 2301 - Open Cluster (H VI-27)

NGC 2301 / H VI-27 (Monoceros) Hidden Treasures H39 [ Herschel 400 Objects ] [ Open Star Clusters ] [ Hidden Treasures ]

CCD Image (70% size) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2019-03-04 21:29 UT (#671014-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 2301 - Earlier Image (2017-12-22)

CCD Image (50% size) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2017-12-22 03:39h UT (#608088-92) 12" LX200R  (at f/10.4) + ST-10XME (Autoguided using TS 80mm APO + ZWO ASI178MC)

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NGC 2335 - Open Cluster (H VIII-32)

NGC 2335 / H VIII-32 (Monoceros)

CCD Image (70% size) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2019-03-04 21:40 UT (#671023-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2018 Y1 (Iwamoto) - Comet

C/2018 Y1 (Iwamoto) (passing through Auriga) Sun Distance 1.34 AU Earth Distance 0.83 AU (123.5 million km)		C/2018 Y1 (Iwamoto) - Detail Aligned on Comet (stars appear trailed due to movement of comet)
CCD Image (50% size) 2 x 30s exposure (average combine), 3x3 binning, C Filter 2019-03-04 21:51 UT (#671032-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (50% size, logscale) 11 x 30s exposure (average combine), 3x3 binning, C Filter 2019-03-04 21:51 UT (#671032-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
More Images of C/2018 Y1 (Iwamoto)

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TrES-3 - Exoplanet Host Star

TrES-3  (Hercules) V mag 12.4, B-V 0.71, TrES-3b Depth 29 mmag, Period 1.31d Alias GSC 3089:929 / V1434 Her / AAVSO UID: 000-BFT-449

Annotated CCD Image (70% size) 12 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-03-05 02:05 UT (#671334-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

TrES-3 - Earlier Image (2019-02-24)

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 - Earlier Image (2007-08-13)

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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Galaxies in TrES-3 Star Field (PGC 2101630 et al)

Galaxies in TrES-3 Star Field (Hercules)  PGC 2101630 (catalog mag +16.8),  PGC 2102574 (catalog mag +16.9) PGC 2101473 (catalog mag +17.7),  PGC 2100869 (catalog mag +18.1)

Annotated Negative CCD Image (70% size) 12 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-03-05 02:05 UT (#671334-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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TrES-3 b - Exoplanet Transit (Dry Run)

340 x 30s frames collected through Astrodon Exoplanet Blue Blocking (Xo or BB) Filter between 2019-03-05 00:25 to 03:51 UT as a dry run practice ahead of some future transit attempt for detecting the TrES-3 b exoplanet.

TrES-3 b Exoplanet  (Hercules)

TrES-3, discovered by O'Donovan et al, 2007,   http://adsabs.harvard.edu/abs/2007ApJ...663L..37O is an exoplanet that orbits the star TrES-3 approximately every 1.31 days Mass 1.910 MJupiter,  radius of 1.336 RJupiter , mean density of 0.994 g cm-3. Period = 1.306190 d, transit epoch Tc = 2454185.91010 ± 0.0003  (BJD) HAT-P-12 lies at a distance 799 light years (245 parsecs), is star with mass 0.915 Msun The image below was taken during a dry run prior to some future transit of TrES-3

Annotated CCD Image (70% size) 12 x 30s exposure (average combine), 3x3 binning, Xo Filter 2019-03-05 02:05 UT (#671334-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

340 x 30s frames collected between 2019-03-05 00:25 to 03:51 UT (JD  2458547.52 - 2458547.66) Images taken through an Astrodon Exoplanet Blue Blocking (BB) Filter, and reduced using the appropriate Master Dark  and Master Flat Frames [ Master.-25c_3x3_030s.S647.AvMedian17.ST10.DARK.FIT & MasterFlat.3x3.Xo.S629.SkyFlats.AvMedian15.FIT ] Photometry made using 3 calibration stars (C1 to C3) based on AAVSO's Photometry Sequence for V1434 Her (TrES-3) (see details below)

Reference Image of TrES-3 Taken through Astrodon Exoplanet Blue Blocking (BB) Filter Showing Calibration Stars (C1-C3) and Check Star (K) used for photometric analysis of TrES-3 TrES-3 (GSC 3089:929) :  V Mag +12.41,  AUID 000-BFT-449 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 K (GSC 3089:741): V Mag +13.001 (0.010),  AUID 000-BJP-974 (C1-C3 stars and their magnitudes are chosen from the AAVSO's Field Photometry for V1434 Her (TrES-3), Chart F, (Source of Sequence Magnitudes  is SRO )

Annotated CCD Image (70% size) 12 x 30s exposure (average combine), 3x3 binning, BB / Xo Filter 2019-03-05 02:05 UT (#671334-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Detailed Light Curve for TrES-3 2019-03-05 00:25 to 03:51 UT with various environmental & supporting information

Differential Magnitudes for TrES-3 are zero based using average calculated magnitude from the entire run (there being no actual transit in this run) Differential Magnitudes for Check Star are  zero based using average calculated magnitude from the entire run and are shifted by +0.10mag for display 5 min moving average of Differential Mags are displayed for both TrES-3 and theCheck Star. No (V+R) magnitude data was available for the BB (Blue -Blocking) filters used and therefore V Magnitude where used instead for the calibration. (This is likely to make the calculated magnitude slightly off the TrES-3's true V mag,  but differential magnitudes should still be good) SNR, Ambient Temperature and Altitide data is shown in the graph for information. (note that altitude varied from 25 to 52 over the course of the observing run) Raw Magnitudes & SNR measured using AstroMain/VMA and CCDSoft.  Calibrated Magnitudes and Differential Magnitudes calculated usin MS Excel (also used for graphing the results)

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