David's Astronomy Pages CCD Images - Session 941 (2021-12-13)

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C/2017 K2 (PANSTARRS) - Comet KIC 8462852 - Variable Star (Tabby's Star) AT2021aegs - CV Type Transient M31 - Spiral Galaxy with Transient AT2021aaxp (attempt) UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw AT2021aemj - Transient Nova Cas 2021 - Nova (V1405 Cas) UGC 1977 - Spiral Galaxy (PGC 9557)      Variable Stars (photometric monitoring) - RX And, SS Cyg, BL Lac, SU Tau      Nearby Stars (astrometric monitoring) - HH And, Groombridge 34, EV Lac

- Evening session 5.9 hours -   - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 3°C (min) - CCD Temperature:  -20°C - Notes from 2021-12-13 >>    [ Local Files >> ]

C/2017 K2 (PANSTARRS) - Comet

C/2017 K2 (PANSTARRS) (passing through Hercules) Sun Distance 4.56 AU (approaching) Earth Distance 5.29 AU (791.1 million km)		C/2017 K2 (PANSTARRS) - 2021-12-13, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 29.48 arcsec/hr, Dec -15.35 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-13 18:13 UT (#941014-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, square root scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-13 18:16 UT (#941014-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C2017 K2 (PANSTARRS) on Comets 2021 Page >>

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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 +11.70 (V) (linked with Detection Threshold = 8)

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2021-12-13 18:28 UT (#941024-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Earlier Image (2021-08-13) Measured Mag +11.1 (V)

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2021-08-13 23:24 UT (#905040-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

KIC 8462852  - Earlier Image (2021-07-25) 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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AT2021aegs - CV Type Transient

AT2021aegs (Cepheus) AT2021aegs (Type: CV) discovered 2021-11-10.435 UT by Gaia Alias: Gaia21fcs  [ Gaia21fcs ]  AT2021aegs / Gaia21fcs is shown by white cross-hairs

Annotated CCD Image  (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 18:39 UT (#941030-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2021aegs - 2021-12-13 (T+33.3d) Image below (2021-12-13.774) was taken 33.3 days after discovery of 2021aegs.

Annotated CCD Image (125% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 18:39 UT (#941030-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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M31 - Spiral Galaxy with Transient AT2021aaxp (attempt)

M31 with AT2021aaxp (Andromeda) AT2021aaxp (Type: Nova) discovered 2021-10-09.613 UT by Balam Alias: PNV J00444033+4113068  Rochester EGN Page | Klaus Wenzel image ) Reported position of transient shown by white circle

Annotated CCD Image  (50% size, square root scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 19:10 UT (#941055-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT2021aaxp - 2021-12-13 (T+65.2d) Image below (2021-12-13.797) was taken 65.2 days after discovery of 2021aaxp Position of earlier transient (no longer visible) is shown by white circle

Annotated CCD Image (125% size, square root scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 19:10 UT (#941055-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw

UGC 2605 with SN2021wvw (Perseus) SN 2021wvw (Type: II, z=0.009944) discovered 2021-08-24.606 UT by PS1 Alias: PS21jnb Host Alias : PGC 12073  (Rochester Supernova site )

UGC 2605 with SN2021wvw - 2021-12-13 (T+111.2d) Image below (2021-12-13.804) was taken 111.2 days after discovery of 2021wvw Position of earlier Supernova (no longer visible) is shown by white cross-hairs

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-13 19:28 UT (#941063-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2605 with SN2021wvw - Earlier Image, 2021-08-28 (T+3.5d) Image below (2021-08-28.109) was taken 3.5 days after discovery of 2021wvw Supernova shown by white cross-hairs Measured magnitude +17.35 (linked with Detection Threshold = 3)

CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 02:46 UT (#909215-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wvw (UGC 2605) on Supernovae 2021 Page >>

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AT2021aemj - Transient

AT2021aemj (Cepheus) AT2021aemj (Type: CV) discovered 2021-11-12.439 UT by Gaia Alias: Gaia21fcz Transient alert triggered at magnitude + 14.39 (0.2 mag rise over historic magnitude +14.61)  [ Gaia21fcz ]  AT2021aemj / Gaia21fcz is shown by white cross-hairs

Annotated CCD Image  (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 19:56 UT (#941082-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2021aemj - 2021-12-13 (T+31.4d) Image below (2021-12-13.828) was taken 31.4 days after discovery of 2021aemj Measured mag + 13.47 vs catalog mag +13.5

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-13 19:56 UT (#941082-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 / AT2021hkn - 2021-12-13 (T+270.4d) Image below (2021-12-13.838) was taken 270.4 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +8.98 (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-12-13 20:07 UT (#941091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-12-13 (T+270.4d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-12-13 20:11 UT (#941096-100) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

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UGC 1977 - Spiral Galaxy (PGC 9557)

UGC 1977 / PGC 9557

Annotated CCD Image  (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-13 21:31 UT (#941144-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 1977 - Earlier Image (2021-11-16)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-16 23:45 UT (#934054-58) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 1977 - Earlier Image (2021-11-09)

Annotated CCD Image  (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 22:53 UT (#932117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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