David's Astronomy Pages CCD Images - Session 928 (2021-10-24)

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Images (S928)

Objects	Session Notes
AT 2021yel - CV Type Transient AT 2021zkf - YSO Transient, V0645 Cyg      NGC 6627 - Spiral Galaxy with Type II Supernova 2021abkm     UGC 235 - Spiral Galaxy with Type II Supernova 2021aazm UGC 12188 - Spiral Galaxy with Type II Supernova 2021ucg      Variable Stars (photometric monitoring) - RX And, SS Cyg, BL Lac      Nearby Stars (astrometric monitoring) - Groombridge 34, EV Lac	- Full night Session (8.8 hours). - Clear skies all night but poor seeing and moonlit - Main aims of the session were to acquire a selection of targets including  Comet 67P/Churyumov-Gerasimenko - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 12°C (min) - CCD Temperature:  -10°C - Notes from 2021-10-25 >>    [ Local Files >> ]   -

AT 2021yel - CV Type Transient

AT 2021yel (Lyra) AT 2021yel (Type: CV) discovered 2021-09-05.712 UT by Gaia Alias: Gaia21edo Discovery Magnitude 16.18 (g-Gaia Filter) Outburst of confirmed CV TCP J19092450+3041330 ( TNS 2021yel | Gaia21edo )

AT 2021yel - 2021-10-25 (T+50.1d) Image below (2021-10-25.803) was taken 50.1 days after discovery of 2021yel Position of earlier transient (not visible) is shown by white cross hairs.

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-10-25 19:19 UT (#928022-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021yel on Transients 2021 Page >>

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AT 2021zkf - YSO Transient, V0645 Cyg

AT 2021zkf / V0645 Cyg (Cygnus) AT2021zkf (Type: YSO) discovered 2021-09-13.232 UT by Gaia Alias: Gaia21ego, GCVS V0645 Cyg Triggering Magnitude 11.16 (G-Gaia Filter) vs Historic Magnitude 12.14 +/- 0.29 SD Slow rise of known YSO V645 Cyg, 1 mag in over 5 years ( TNS 2021zkf | Gaia21ego )

AT 2021zkf - 2021-10-25 (T+42.6d) Image below (2021-10-25.811) was taken 42.6 days after discovery of 2021zkf Position of transient (distinct, fading) is shown by white cross-hairs Measured Magnitude +11.50 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-10-25 19:37 UT (#928029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021zkf / V0645 Cyg on Transients 2021 Page >>

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NGC 6627 - Spiral Galaxy with Type II Supernova 2021abkm

NGC 6627 with SN 2021abkm (Hercules) SN 2021abkm (Type: II) discovered 2021-10-14.208 UT by ATLAS Alias: ATLAS21bkcp, Gaia21ewt Discovery Magnitude 18.15 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.03 Confirmed SN II Gaia, 2021-10-26 04:19:46, Mag 18.32 Gaia, 2022-02-18 22:00:41, Mag 20.68 Gaia, 2022-03-17 17:43:09, Mag 20.87  (Rochester Supernova site | Enrico Prosperi image ) ( TNS 2021abkm | Gaia21ewt )

NGC 6627 with SN 2021abkm - 2021-10-25 (T+11.6d) Image below (2021-10-25.797) was taken 11.6 days after discovery of 2021abkm Position of SN (very faint) is shown by white cross-hairs Poor quality image (single frame)

Annotated CCD Image  (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-10-25 19:07 UT (#928019) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021abkm (NGC 6627) on Supernovae 2021 Page >>

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UGC 235 - Spiral Galaxy with Type II Supernova 2021aazm

UGC 235 with SN2021aazm (Andromeda) SN 2021aazm (Type: II) discovered 2021-10-09.830 UT by XOSS Alias: XM75HT Discovery Magnitude 18.32 (Clear Filter)  (Rochester Supernova site | Stan Howerton image | TNS 2021aazm )

UGC 235 with SN 2021aazm - 2021-10-25 pm (T+16.0d) Image below (2021-10-25.849) was taken 16.0 days after discovery of 2021aazm Position of supernova (very faint) is shown by white cross-hairs Estimated Magnitude +18.5 (Clear Filter)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-10-25 20:31 UT (#928048-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN2021abko (UGC 235) on Supernovae 2021 Page >>

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UGC 12188 - Spiral Galaxy with Type II Supernova 2021ucg

UGC 12188 with SN2021ucg (Lacerta) SN 2021ucg (Type: II) discovered 2021/07/25.516 UT by ATLAS Alias: ATLAS21bchd Discovery Magnitude 18.06 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.45 Host Alias : PGC 69727 (catalog mag +14.4)  (Rochester Supernova site | Odd Trondal image  | TNS 2021ucg )

UGC 12188 with SN 2021ucg - 2021-10-25 (T+92.3d) Image below (2021-10-25.835) was taken 92.3 days after discovery of 2021ucg Position of SN (faint) is shown by white cross-hairs Measured magnitude +16.13 (Clear Filter)

CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-10-25 20:10 UT (#928042-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021ucg (UGC 12188) on Supernovae 2021 Page >>

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