David's Astronomy Pages CCD Images - Session 899 (2021-05-31)

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Images (S900)

Objects	Session Notes
NGC 5861 - Spiral Galaxy     UGC 11177 - Spiral Galaxy with Type Ia Supernova 2021koq     VV 807 - Spiral Galaxy with Type AGN Transient AT 2021fbu     Variable Stars (photometric monitoring) - R CrB, AM Her, SS Her, BL Lac     Nearby Stars (astrometric monitoring) - Barnards Star	- Night session (1.8 hours) - Main aims of the session were to test latest AstroMain version and acquire a selection of variable star, nearby star, comet & deep sky targets. - Summer sky - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 9.5°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2021-05-31 >>    [ Local Files >> ]   -

NGC 5861 - Spiral Galaxy

NGC 5861 (Libra) NGC 5861 (Spiral Galaxy) with NGC 5858 (Elliptical Galaxy) Ast.Now Deep Sky Challenge Object, Jun 2021 [ Deep Sky Challanges (Ast.Now) ]

Annotated CCD Image  (50% size, square root scale) 6 x 90s exposure (average combine), 3x3 binning, C Filter 2021-05-31 23:49 UT (#899010-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5861 - Detail Image taken under twilight sky conditions (Sun Alt -10.5°) Target to be rescheduled for darker sky condition.

CCD Image  (100% size, square root scale, cropped) Image details as above

NGC 5858 - Detail

CCD Image  (100% size, square root scale, cropped) Image details as above

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UGC 11177 - Spiral Galaxy with Type Ia Supernova 2021koq

UGC 11177 with SN 2021koq (Ophiuchus) SN 2021koq (Type: Ia) discovered 2021/04/28.486 UT by ATLAS Alias: ATLAS21nmi Discovery Magnitude 17.84 (orange-ATLAS Filter)  ( Rochester Supernova site | TNS 2021koq | TNS AstroNote ATLAS21nmi )

UGC 11177 with SN 2021koq - 2021-06-01 (T+33.6d) Image below (2021-06-01.044) was taken 33.6 days after discovery of 2021koq Position of reported transient (very faint) is shown by white cross-hairs Very poor quality image (bright sky background, low S/N)

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-06-01 01:09 UT (#899074-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021koq (in UGC 11177) on Supernovae 2021 Page >>

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VV 807 - Spiral Galaxy with Type AGN Transient AT 2021fbu

VV 807 with AT 2021fbu (Hercules) AT 2021fbu (Type: AGN) discovered 2021/03/06.861 UT by Gaia Alias: Gaia21bgd Discovery Magnitude +16.36 (G-Gaia Filter)  (Rochester Supernova site | TNS 2021fbu | Gaia21bgd )  [ Vorontsov-Velyaminov Galaxies ]

VV 807 with AT 2021fbu - 2021-06-01 (T+86.2d) Image below (2021-06-01.021) was taken 86.2 days after discovery of 2021fbu Position of transient (not separately distinguishable) is shown by white cross hairs.   Measured magnitude +15.14 (nucleus + transient, Clear Filter) Poor quality image (bright sky background)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-06-01 00:38 UT (#899056-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021fbu (in VV 807) on Transients 2021 Page >>

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