David's Astronomy Pages CCD Images - Session 934 (2021-11-16)

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Session Notes

AT2021aetv - Type CV Transient (Unconfirmed) NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju Nova Cas 2021 - Nova (V1405 Cas) UGC 1977 - Spiral Galaxy (PGC 9557) AT2021wuy - Type CV Transient (Attempt) UGC 3240 - Spiral Galaxy with Type Ia Supernova 2021vau 10P/Tempel - Comet Nova Per 2020 - Nova (V1112 Per, AT2020abap) NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl IC 357 - Spiral Galaxy AT2021ckv - Type YSO Transient  (GCVS PR Ori) C/2019 L3 (ATLAS) - Comet PGC 21754 - Spiral Galaxy IC 482 - Spiral Galaxy (PGC 22409) UGC 5751 - Spiral Galaxy with Type Ibn Supernova 2021abcw 15P/Finlay - Comet 67P/Churyumov-Gerasimenko - Comet C/2021 A1 (Leonard) - Comet NGC 4583 - Spiral Galaxy with Transient AT2021aetw UGC 8975 - Spiral Galaxy with Type Ia Supernova 2021adpe UGC 5994 - Spiral Galaxy with Transient AT2021ably      Variable Stars (photometric monitoring) - RX And, Z And, SY Cnc, RZ LMi, BL Lac, CN Ori, GK Per      Nearby Stars (astrometric monitoring) - DX Cnc, Groombridge 34, Scholz's Sta, Teegardens Star

- All night session 8.5 hours - Session interrupted by occasional cloud. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1.5°C (min) - CCD Temperature:  -20°C - Notes from 2021-11-16 >>    [ Local Files >> ]

AT2021aetv - Type CV Transient (unconfirmed)

AT2021aetv (Pisces) AT2021aetv (Type: CV) discovered 2021-11-12.220 UT by Robert Nelson Alias: RHN-001, GSC 0015-0388

AT2021aetv - 2021-11-16 (T+4.7d) Image below (2021-11-16.910) was taken 4.7 days after discovery of AT2021aetv AT2021aetv is shown by white cross-hairs Measured magnitude +11.4 vs GCS 15:388 catalog mag +11.5 and UCA/USNO2 catalog mag +11.4 No indication of any significant brightning. The transient is therefore unconfirmed. Star would seem to have returned to normal state

Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-16 21:54 UT (#934003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju

NGC 9 with SN2021zju (Pegasus) SN 2021zju (Type: Ib) discovered 2021-09-24.483 UT by ATLAS Alias: ATLAS21bjbm, ZTF21acdxhuv  (Rochester Supernova site | Enrico Prosperi image )

NGC 9 with SN2021zju - 2021-11-16 (T+53.5d) Image below (2021-11-16.958) was taken 53.5 days after discovery of 2021zju Supernova (faint) is shown by white cross-hairs Poor quality image due to and bright moonlit sky / poor transparency

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-16 23:10 UT (#934034-38) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021zju (NGC 9) on Supernovae 2021 Page >>

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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 - 2021-11-16 (T+243.6d) Image below (2021-11-16.974) was taken 243.6 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +8.84 (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-11-16 23:25 UT (#934042-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-11-16 (T+243.6d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-11-16 23:28 UT (#934047-51) 12" LX200R (at f/10.4) + ST-10XME

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) 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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AT2021wuy - Type CV Transient (Attempt)

AT2021wuy (Auriga) AT2021wuy (Type: CV) discovered 2021-08-22.291 UT by Gaia Alias: Gaia21dxt Transient alert triggered by 2.5 mag rise in magnitude from +19.4 to +16.9 [ Gaia21dxt ]

AT2021wuy - 2021-11-17 (T+86.7d) Image below (2021-11-17.004) was taken 86.7 days after discovery of 2021wuy Reported position of AT2021wuy is shown by white circle

Annotated CCD Image (50% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 00:09 UT (#934072-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2021wuy - Detail, 2021-11-17 (T+86.7d) Image below (2021-11-17.004) was taken 86.7 days after discovery of 2021wuy Star shown by white cross-hairs may or may not be AT2021wuy Measured magnitude +14.8 (vs catalog mag +15.4 in UCA/USNO2) Adjacent faint star has estimated mag of +16.8 and might be AT2021wuy instead. Alternatively AT2021wuy might be a third star (not visible) that has faded back to its historic magnitude of +19.4

Annotated CCD Image (125% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 00:09 UT (#934072-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (125% size, linear scale) Image details as above

Reference picture for Gaia21dxt Aladin Insert on gsaweb's Gaia21dxt web page

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UGC 3240 - Spiral Galaxy with Type Ia Supernova 2021vau

UGC 3240 with SN2021vau (Orion) SN 2021vau (Type: Ia, z=0.036) discovered 2021/08/04.610 UT by ASAS-SN Alias: ASASSN-21ou, Gaia21dzq Host Alias : PGC 16668 (catalog mag +15.5)  (Rochester Supernova site | Discovery image | Gaia21dzq )

UGC 3240 with SN2021vau - 2021-11-17 (T+104.4d) Image below (2021-11-17.012) was taken 104.4 days after discovery of 2021vau Supernova shown by white indicator line Measured magnitude +16.0 (SN + Host Nucleus) (vs catalog mag for UGC/PGC 16668 of +15.5) Image quality degraded by bright moonlit sky

CCD Image  (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 00:26 UT (#934079-81) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vau (UGC 3240) on Supernovae 2021 Page >>

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10P/Tempel - Comet

10P/Tempel  (passing through Taurus) Sun Distance 2.59 AU Earth Distance 1.63 AU (244.4 million km) Position of comet shown by white cross-hairs		10P/Tempel - 2021-11-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -41.89 arcsec/hr, Dec -1.19 arcsec/hr).
Annotated CCD Image (50% size, linear scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 00:46 UT (#934087-89) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, linear scale, cropped)  Image details as left
Images of 10P/Tempel on Comets 2021 Page >>

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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 - 2021-11-17 (T+356.2d) Image below (2021-11-17.039) was taken 356.2 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +15.7 (fading)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2021-11-17 01:01 UT (#934093-96) 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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NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl

NGC 940 with SN2021vtl (Triangulum) SN 2021vtl (Type: Ia) discovered 2021-08-11.930 UT by XOSS Alias: PSP21D, Gaia21duk, PSN J02292803+3138385  (Rochester Supernova site )

NGC 940 with SN2021vtl - 2021-11-17 (T+97.1d) Image below (2021-11-17.055) was taken 97.1 days after discovery of 2021vtl No indication of earlier SN object, this is most probably because SN has faded

Annotated CCD Image  (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 01:28 UT (#934116-20) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vtl (NGC 940) on Supernovae 2021 Page >>

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IC 357 - Spiral Galaxy

IC 357 (Taurus) Alias PGC 14384 (catalog mag +15.0)

CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:02 UT (#934133-37) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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AT2021ckv - Type YSO Transient  (GCVS PR Ori)

AT2021ckv / PR Ori  (Orion) AT2021ckv (Type: YSO) discovered 2021/02/08.759 UT by Gaia Alias: Gaia21arx, GCVS PR Ori  [ Gaia21arx ]

AT2021ckv / PR Ori - AT2021ckv - 2021-11-17 (T+281.3d) Image below (2021-11-17.094) was taken 281.3 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.1 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:18 UT (#934142-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) (passing through Lynx) Sun Distance 3.59 AU  (approaching) Earth Distance 2.97 AU (444.2 million km)		C/2019 L3 (ATLAS)  - 2021-11-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -9.23 arcsec/hr, Dec -14.86 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:41 UT (#934157-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:44 UT (#934157-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2019 L3 (ATLAS) on Comets 2021 Page >>

C/2019 L3 (ATLAS) Inverse Spectrum

C/2019 L3 (ATLAS)  - 2021-11-17

False Colour CCD Image (70% size, log scale) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:44 UT (#934157-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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PGC 21754 - Spiral Galaxy

PGC 21754 ( Lynx)

CCD Image (150% size, log scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 02:44 UT (#934157-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

False Colour CCD Image (150% size, log scale, cropped) Inverse Spectrum Image details as above

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IC 482 - Spiral Galaxy (PGC 22409)

IC 482 (Gemini) Alias: PGC 22409 Glare on right of image is from HIP 39191 (mag 5.87) which lies 7.4' outside of field of view

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 03:22 UT (#934188-92) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image (125% size, square root scale, cropped) Image details as above

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UGC 5751 - Spiral Galaxy with Type Ibn Supernova 2021abcw

UGC 5751 with SN2021abcw (Leo) SN 2021abcw (Type: Ibn) discovered 2021-10-11.480 UT by ASAS-SN Alias: ASASSN-21td, Gaia21ewv  (Rochester Supernova site | Discovery Image )

UGC 5751 with SN2021abcw UGC 5731 / PGC 31388 (catalog mag +14.7) with adjacent galaxies  PGC 31434 (catalog mag +14.9), PGC 31394 (catalog mag +15.9) PGC 31386 (catalog mag +15.6), PGC 1643010 (catalog mag +16.6),  PGC 1642183 (catalog mag +17.6), PGC 1641820 (catalog mag +18.0)

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:09 UT (#934206-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 5751 with SN2021abcw - 2021-11-17 (T+36.7d) Image below (2021-11-17.167) was taken 36.7 days after discovery of 2021abcw SN (faint) shown by white cross-hairs

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:09 UT (#934206-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of  SN 2021abcw (UGC 5751) on Supernovae 2021 Page >>

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15P/Finlay - Comet

15P/Finlay (passing through Gemini) Sun Distance 1.19 AU (receeding) Earth Distance 1.41 AU (210.7 million km) Comet position is shown by white cross-hairs		15P/Finlay - 2021-11-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 9.91 arcsec/hr, Dec 7.56 arcsec/hr) Comet (faint) shown by white cross-hairs, best seen in negative image as a small fuzzy blob
Annotated CCD Image (50% size, square root scale) 9 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:24 UT (#934213-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped)  9 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:24 UT (#934213-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 15P/Finlay on Comets 2021 Page >>
		Negative CCD Image (100% size, square root scale, cropped)  Image details as above

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67P/Churyumov-Gerasimenko - Comet

67P/Churyumov-Gerasimenko (passing through Cancer) Sun Distance 1.23 AU (turning) Earth Distance 0.42 AU (62.7 million km)		67P/Churyumov-Gerasimenko - 2021-11-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 107.75 arcsec/hr, Dec 2.12 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:44 UT (#934227-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, log scale, cropped) 15 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:49 UT (#934227-41) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 67P/Churyumov-Gerasimenko on Comets 2021 Page >>

67P/Churyumov-Gerasimenko - False Colour Image(s)  Inverse Spectrum

67P/Churyumov-Gerasimenko - 2021-11-17

False Colour CCD Image (70% size, log scale) 15 x 45s exposure (average combine), 3x3 binning, C Filter 2021-11-17 04:49 UT (#934227-41) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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C/2021 A1 (Leonard) - Comet

C/2021 A1 (Leonard) (passing through Canes Venatici) Sun Distance 1.14 AU (approaching) Earth Distance 1.02 AU (152.1 million km)		C/2021 A1 (Leonard) - 2021-11-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 48.68 arcsec/hr, Dec -11.87 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:06 UT (#934245-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, log scale, cropped) 9 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:07 UT (#934243-51) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2021 A1 (Leonard) on Comets 2021 Page >>

C/2021 A1 (Leonard)  - False Colour Image(s)  Inverse Spectrum

C/2021 A1 (Leonard) - 2021-11-17

False Colour CCD Image (70% size, log scale) 9 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:07 UT (#934243-51) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 4583 - Spiral Galaxy with Transient AT2021aetw

NGC 4583 with AT2021aetw (Canes Venatici) AT2021aetw (Type: unk) discovered 2021-11-14.490 UT by ASAS-SN Alias: ASASSN-21uz  (Rochester Supernova site )

NGC 4583 NGC 4583  / PGC 42198 (catalog mag +13.6 or +14.6) with adjacent galaxy PGC 42179 (catalog mag +16.2)

Annotated CCD Image  (50% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:27 UT (#934253-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4583 with AT2021aetw - 2021-11-17 (T+2.7d) Image below (2021-11-17.221) was taken 2.7 days after discovery of 2021aetw Position of reported SN shown by white cross-hairs No indication of any distinct object or significant brightning Measured Magnitude (nucleus + transient):  +14.7 (vs. galaxy catalog mag of +13.6 or +14.6)

Annotated CCD Image  (125% size, log scale, cropped) Image details as above

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UGC 8975 - Spiral Galaxy with Type Ia Supernova SN 2021adpe

UGC 8975 with SN 2021adpe (Canes Venatici) SN 2021adpe (Type: Type Ia, z=0.009) discovered 2021-11-04.975 UT by Gaia  Alias: Gaia21fas,  Mag +17.76 at discovery  (Rochester Supernova site | Gaia21fas )

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:48 UT (#934261-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 8975 with SN 2021adpe - 2021-11-17 (T+12.3d) Image below (2021-11-17.235) was taken 12.3 days after discovery of 2021adpe Position of reported Candiate SN (AT2021adpe) shown by white cross-hairs Measured Magnitude ?  (unable to extract object in CCDSoft/Sextractor)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 05:48 UT (#934261-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021adpe (UGC 8975) on Supernovae 2021 Page >>

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UGC 5994 - Spiral Galaxy with Transient AT2021ably

UGC 5994 with AT2021ably (Leo) AT2021ably (Type: unk) discovered 2021-10-14.615 UT by ATLAS Alias: ATLAS21bkdw, Gaia21eym,  Mag +17.87 at discovery  (Rochester Supernova site | Gaia21eym )

Annotated CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-17 06:12 UT (#934270-73) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 5994 with AT2021ably - 2021-11-17 (T+33.6d) Image below (2021-11-17.252) was taken 33.6 days after discovery of 2021ably Position of reported transient is close to galaxy centre (no indication of transient or significant brightening of galaxy)

Annotated CCD Image  (125% size, square root scale, cropped) Image details as above

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