David's Astronomy Pages CCD Images - Session 902 (2021-07-24)

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Objects	Session Notes
KIC 8462852 - Variable Star (Tabby's Star) Nova Per 2020 - Nova (V1112 Per, AT2020abap)     AT 2021dma - CV Type Transient AT 2021dmc - CV Type Transient AT 2021dvd - CV Type Transient AT 2021dwy - CV Type Transient     Variable Stars (photometric monitoring) - CI Cyg, S Cyg, SS Cyg, AM Her, U Her, BL Lac, CY Lyr     Nearby Stars (astrometric monitoring) - HH And, Barnards Star, Groombridge 34	- Night session (3.2 hours) - Summer sky conditions - Main aims of the session were to test latest AstroMain version and acquire a selection of targets as conditions allowed - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 8.5°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2021-07-24 >>    [ Local Files >> ]   -

Observing Result

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KIC 8462852 - Variable Star (Tabby's Star)

KIC 8462852 / Tabby's Star (Cygnus) Alias: Boyajian's Star, WTF Star ("Where’s the Flux?") Distance 1470 ly. Magnitude +11.7 Star shows large irregular dimmings. KIC 8462852 shown by white cross-hairs Measured Mag +11.71 (V)

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2021-07-25 01:24 UT (#902129-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Earlier Image (2020-12-02) Measured Mag +11.94 (C), + 11.82 (V)

Annotated CCD Image  (50% size, linear scale, cropped) 4 x 30s exposure (average combine), 3x3 binning, C Filter 2020-12-02 21:38 UT (#837157-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852 Links: AAVSO Info : https://www.aavso.org/category/tags/kic-8462852 Unofficial Page for Where's the Flux? Discovery Paper:  1509.03622.pdf (arxiv.org)

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Nova Per 2020 - Nova (V1112 Per, AT2020abap)

Nova Per 2020 (Perseus) Nova in Perseus discovered 2020/11/25.807 [ Novae ] Nova Per 2020 discovered independently by Seiji Ueda and Stanislav Korotkiy et al AT2020abap (Type: CV) reported 2020/11/27.230 UT by PGIR Alias: N Per 2020 , PGIR20fbf, TCP J04291888+4354233, TCP J04291884+4354232, V1112 Per

Nova Per 2020 (CV) - 2021-07-24 (T+241.2d) Image below (2021-07-24.993) was taken 241.2 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +15.1

CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2021-07-24 23:56 UT (#902043-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Per 2020 on Novae Page >>

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AT 2021dma - CV Type Transient

AT 2021dma (Cepheus) AT 2021dma (Type: CV) discovered 2021/02/18.076 UT by Gaia Alias: Gaia21aye Discovery Magnitude 14.02 (G-GaiaFilter) vs Historic Magnitude 14.24 +/- 0.04 SD Galactic plane source brightens by 0.2 mag ( TNS 2021dma | Gaia21aye )

AT 2021dma - 2021-07-24 (T+156.9d) Image below (2021-07-24.983) was taken 156.9 days after discovery of 2021dma Position of transient (distinct) is indication by white cross-hairs Measured Magnitude +13.58 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-07-24 23:38 UT (#902034-38) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dma on Transients 2021 Page >>

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AT 2021dmc - CV Type Transient

AT 2021dmc (Cygnus) AT 2021dmc (Type: CV) discovered 2021/02/17.839 UT by Gaia Alias: Gaia21ayg Discovery Magnitude 14.16 (G-GaiaFilter) vs Historic Magnitude 14.45 +/- 0.01 SD Source in the Galactic plane brightens by 0.3 mag  ( TNS 2021dmc | Gaia21ayg )

AT 2021dmc - 2021-07-25 (T+157.2d) Image below (2021-07-25.064) was taken 157.2 days after discovery of 2021dmc Position of transient (faint) is indication by white cross-hairs Measured Magnitude +13.47 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-07-25 01:35 UT (#902135-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dmc on Transients 2021 Page >>

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AT 2021dvd - CV Type Transient

AT 2021dvd (Vulpecula) AT 2021dvd (Type: CV) discovered 2021/02/21.110 UT by Gaia Alias: Gaia21bba Discovery Magnitude 14.42 (G-GaiaFilter) vs Historic Magnitude 14.61 +/- 0.05 SD ~ 0.2 mag rise in bright Gaia source in the Galactic plane ( TNS 2021dvd | Gaia21bba )

AT 2021dvd - 2021-07-24 (T+153.8d) Image below (2021-07-24.958) was taken 153.8 days after discovery of 2021dvd Position of transient (faint) is indication by white cross-hairs Measured Magnitude +13.47 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-07-24 23:02 UT (#902004-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dvd on Transients 2021 Page >>

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AT 2021dwy - CV Type Transient

AT 2021dwy (Vulpecula) AT 2021dwy (Type: CV) discovered 2021/02/22.613 UT by Gaia Alias: Gaia21bch Discovery Magnitude 14.20 (G-GaiaFilter) vs Historic Magnitude 14.59 +/- 0.09 SD Gaia source brightens by 0.4 mag ( TNS 2021dwy | Gaia21bch )

AT 2021dwy - 2021-07-25 (T+152.4d) Image below (2021-07-25.028) was taken 152.4 days after discovery of 2021dwy Position of transient (faint) is indication by white cross-hairs Measured Magnitude +14.62 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-07-25 00:43 UT (#902097-101) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dwy on Transients 2021 Page >>

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