David's Astronomy Pages CCD Images - Session 944 (2021-12-24)

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Session Notes

132P/Helin-Roman-Alu - Comet C/2019 L3 (ATLAS) - Comet     Nova Cas 2021 - Nova (V1405 Cas)     UGC 12188 - Spiral Galaxy with Type II Supernova 2021ucg        - UGC 1971 w/SN2021afkk attempt failed due to poor/failed guiding - NGC 7446 w/SN2021agdd failed to poor guiding & cloud - NGC 4227 w/SN2021biz attempt failed due to cloud/bright sky      Variable Stars (photometric monitoring) - AM CVn, YZ, Cnc, RZ LMi, BL Lac, RR Taus, SU Tau      Nearby Stars (astrometric monitoring) - None

- All night session 10.2 hours, interrupted by cloud. -   - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 2.5°C (min) - CCD Temperature:  -20°C - Notes from 2021-12-24 >>    [ Local Files >> ]

132P/Helin-Roman-Alu - Comet

132P/Helin-Roman-Alu (passing through Cetus) Sun Distance 1.74 AU (receeding) Earth Distance 1.17 AU (175.6 million km)		132P/Helin-Roman-Alu - 2021-12-24, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 64.06 arcsec/hr, Dec 27.59 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-24 22:36 UT (#944041-43) 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) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-24 22:36 UT (#944041-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 132P/Helin-Roman-Alu on Comets 2021 Page >>

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C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) (passing through Gemini) Sun Distance 3.56 AU (approaching) Earth Distance 2.61 AU (390.3 million km)		C/2019 L3 (ATLAS)  - 2021-12-25, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -38.06 arcsec/hr, Dec -24.84 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-25 01:27 UT (#944078-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 4 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-25 01:28 UT (#944078-81) 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)  - 2021-12-25

False Colour CCD Image (70% size, log scale) 4 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-25 01:28 UT (#944078-81) 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 - 2021-12-24 (T+281.5d) Image below (2021-12-24.928) was taken 281.5 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +9.20 (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-12-24 22:18 UT (#944024-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-12-24 (T+281.5d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 3 x 30s exposure (average combine), 2x2 binning, S Filter 2021-12-24 22:21 UT (#944029-32) 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 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 SN2021ucg - 2021-12-24 (T+152.4d) Image below (2021-12-24.912) was taken 152.4 days after discovery of 2021ucg Position of earlier SN (no longer visible) is shown by white cross-hairs

CCD Image  (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-24 22:00 UT (#944016-18) 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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