David's Astronomy Pages CCD Images - Session 942 (2021-12-16)

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132P/Helin-Roman-Alu - Comet NGC 7446 - Elliptical Galaxy with Type Ia Supernova 2021agdd Nova Cas 2021 - Nova (V1405 Cas) NGC 1400 - Elliptical Galaxy with Type Ia Supernova 2021hcz (faded) AT 2021xbh - Type Nova? Transient (Attempt)       Following Targets were unguided due to a PHD2 application Failure : UGC 4671 - Spiral Galaxy with Type Ia Supernova 2021afsj C/2019 L3 (ATLAS) - Comet 67P/Churyumov-Gerasimenko - Comet NGC 2955 - Spiral Galaxy AT 2021agdv - Variable Star Transient  (GSC 5966:2500) AT 2021rl - BL Type Transient (QSO 0954+658) UGC 3855 - Spiral Galaxy with Type II Supernova 2021agco NGC 3310 - Spiral Galaxy (Herschel IV-60) with SN 2021gmj IC 719 - Spiral Galaxy NGC 3836 - Spiral Galaxy with Type II Supernova 2021aefs (attempt) SBS 0951+534 - Galaxy AT 2021aena - CV Type Transient (Attempt)      Variable Stars (photometric monitoring) - U An, Z And, R CrB, SS Cyg, RZ LMi, BL Lac, FO Ori,FU Ori, NV Ori, DY Per, RR Tau      Nearby Stars (astrometric monitoring) - HH And, CN Leo, Teegardens Star

- Evening session 11.7 hours -   - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 0.5°C (min) - CCD Temperature:  -20°/-25°C - Notes from 2021-12-16 >>    [ Local Files >> ]

132P/Helin-Roman-Alu - Comet

132P/Helin-Roman-Alu (passing through Cetus) Sun Distance 1.72 AU (receeding) Earth Distance 1.10 AU (163.9 million km)		132P/Helin-Roman-Alu - 2021-12-16, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 59.42 arcsec/hr, Dec 25.30 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-16 19:26 UT (#942008-10) 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) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-16 19:23 UT (#942004-10) 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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NGC 7446 - Elliptical Galaxy with Type Ia Supernova 2021agdd

NGC 7446 with SN 2021agdd (Andromeda) SN 2021agdd (Type: Ia) discovered 2021-12-07.152 UT by DLT40 Alias: DLT21ag  ( Rochester Supernova site | Discovery Image  )

NGC 7446 with SN 2021agdd- 2021-12-16 (T+9.7d) NGC 7446 with adjacent named galaxies NGC 7445 and NGC 7449 plus several other unlabelled galaxies

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 19:42 UT (#942013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7446 with SN 2021agdd - 2021-12-16 (T+9.7d) Image below (2021-12-16.815) was taken 9.7 days after discovery of 2021agdd SN is shown by white cross hairs.  Measured Magnitude +16.25

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 19:42 UT (#942013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

Images of SN 2021agdd (NGC 7446) 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 / AT 2021hkn - 2021-12-16 (T+273.4d) Image below (2021-12-16.863) was taken 273.4 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +9.06 (linked with Detection Threshold = 50

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-12-16 20:43 UT (#942057-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-12-16 (T+273.4d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-12-16 20:47 UT (#942062-66) 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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NGC 1400 - Elliptical Galaxy

NGC 1400 (Eridanus) SN 2021hcz (Type: Ia) discovered 2021/03/24.984 UT by Gaia Alerting magnitude +15.43 Alias: Gaia21bmx  ( Rochester Supernova site | Discovery Image  )

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 21:36 UT (#942097-101) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1400 - Detail Image below (2021-12-16.893) was taken 266.9 days after discovery of SN 2021hcz Transient is no longer visible Poor quality image due to bright moonlight

CCD Image  (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 21:36 UT (#942097-101) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021hcz (NGC 1400) on Supernova 2021 Page >>

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AT 2021xbh - Type Nova? Transient (Attempt)

AT 2021xbh (Camelopardalis) AT 2021xbh (Type: Nova?) discovered 2021-08-27.873 UT by XOSS Alias: KATS21Q001  ( Rochester Supernova site | KATS21Q001 Image  )

Annotated CCD Image  (50% size, linear scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 22:35 UT (#942117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021xbh - Detail, 2021-12-16 (T+111.1d) Image below (2021-12-16.935) was taken 111.1 days after discovery of 2021xbh Position of earlier transient (no longer visible) is shown by white circle

Annotated CCD Image  (100% size, linear scale, cropped) Image details as above

Images of AT 2021xbh on Transients 2021 Page >>

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UGC 4671 - Spiral Galaxy with Type Ia Supernova 2021afsj

UGC 4671 with SN 2021afsj (Ursa Major) SN 2021afsj (Type: Ia) discovered 2021-11-29.718 UT by Shuji Tokuoka Alias: Gaia21flf, ZTF21acqstfo  ( Rochester Supernova site | Gaia21flf  )

Annotated CCD Image  (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 23:56 UT (#942179-82) 12" LX200R (at f/10.4) + ST-10XME Non-guided

UGC 4671 with SN 2021afsj - 2021-12-16 (T+17.3d) Image below (2021-12-16.989) was taken 17.3 days after discovery of 2021afsj Position of SN is shown by white cross-hairs Measured magnitude +14.0

Annotated CCD Image  (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-16 23:56 UT (#942179-82) 12" LX200R (at f/10.4) + ST-10XME Non-guided

Images of SN 2021afsj (UGC 4671) on Supernovae 2021 Page >>

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C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) (passing through Auriga) Sun Distance 3.56 AU (approaching) Earth Distance 2.65 AU (397.0 million km)		C/2019 L3 (ATLAS)  - 2021-12-17, Detail Comet's rate of motion (Ra -34.66 arcsec/hr, Dec -22.22 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-17 00:55 UT (#942206-08) 12" LX200R (at f/10.4) + ST-10XME Non-guided		CCD Image (100% size, log scale, cropped) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-17 00:53 UT (#942200-08) 12" LX200R (at f/10.4) + ST-10XME Non-guided
Images of C/2019 L3 (ATLAS) on Comets 2021 Page >>

C/2019 L3 (ATLAS) Inverse Spectrum

C/2019 L3 (ATLAS)  - 2021-12-17

False Colour CCD Image (70% size, log scale) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-17 00:53 UT (#942200-08) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

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67P/Churyumov-Gerasimenko - Comet

67P/Churyumov-Gerasimenko (passing through Cancer) Sun Distance 1.33 AU (receeding) Earth Distance 0.45 AU (66.7 million km)		67P/Churyumov-Gerasimenko - 2021-12-17, Detail 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 2021-12-17 01:04 UT (#942211-13) 12" LX200R (at f/10.4) + ST-10XME Non-guided		Annotated CCD Image (100% size, log scale, cropped) 12 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-17 01:09 UT (#942211-24) 12" LX200R (at f/10.4) + ST-10XME Non-guided
Images of 67P/Churyumov-Gerasimenko on Comets 2021 Page >>

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

67P/Churyumov-Gerasimenko - 2021-12-17

False Colour CCD Image (70% size, log scale) 12 x 45s exposure (average combine), 3x3 binning, C Filter 2021-12-17 01:09 UT (#942211-24) 12" LX200R (at f/10.4) + ST-10XME Non-guided

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NGC 2955 - Spiral Galaxy

NGC 2955 (Leo Minor) SN 2021jtt (Type: SN) discovered 2021/04/15.199 UT by ZTF Alias: ZTF21aavoqpl  ( Rochester Supernova site | Manfred Mrotzek image w/SN 2021jtt )

Annotated CCD Image  (50% size, square root scale) 180s exposure (single frame), 3x3 binning, C Filter 2021-12-17 01:23 UT (#942227) 12" LX200R (at f/10.4) + ST-10XME Non-guided

NGC 2955 - Detail Image below (2021-12-17.056) was taken 245.9 days after discovery of SN 2021jtt Position of earlier SN (not visible) is shown by white cross-hairs Earlier SN is presumed to have faded and is no longer visible

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

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AT 2021agdv - Variable Star Transient  (GSC 5966:2500)

AT 2021agdv (Canis Major) AT 2021agdv (Type: Star, class unknown ) discovered 2021-12-07.784 UT by Gaia Alias: Gaia21fly, GSC 5966:2500   Alert triggered at magnitude +11.24 (vs Historic magnitiude +11.55)  ( Rochester Supernova site | Gaia21fly )

Annotated CCD Image  (50% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-17 01:45 UT (#942235-39) 12" LX200R (at f/10.4) + ST-10XME Unguided

AT 2021agdv - 2021-12-17 (T+9.3d) Image below (2021-12-17.071) was taken 9.3 days after discovery of 2021agdv Measured magnitude +11.3 (vs catalog mag +11.4)

Annotated CCD Image  (100% size,  linear scale, cropped) Image details as above Unguided

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AT 2021rl - BL Type Transient (QSO 0954+658)

AT 2021rl (Ursa Major) BL Type Transient, QSO 0954+658, 6C 095456+654857 AT 2021rl (Type: BL) discovered 2021/01/06.449 UT by Gaia Alias: Gaia21acz   Triggering Magnitude 14.21 (vs Historic Magnitude 15.57) ( Gaia21acz )

AT 2021rl - 2021-12-17 (T+344.7d) Image below (2021-12-17.124) was taken 344.7 days after discovery of 2021rl BL Type object shown by white cross hairs. Measured magnitude +15.1  (vs catalog mag of +15.5)

Annotated CCD Image  (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 03:08 UT (#942276-80) 12" LX200R (at f/10.4) + ST-10XME Non-guided

Images of AT 2021rl  (QSO 0954+658) on Transients 2021 Page >>

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UGC 3855 - Spiral Galaxy with Type II Supernova 2021agco

UGC 3855 with SN 2021agco (Lynx) SN 2021agco (Type: II) discovered 2021-12-05.564 UT by XOSS Alias: PSP21al  ( Rochester Supernova site | Andrea Mantero image | Jordi Camarasa image)

Annotated CCD Image  (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 04:17 UT (#942298-301) 12" LX200R (at f/10.4) + ST-10XME Non-guided

UGC 3855 with SN 2021agco - 2021-12-17 (T+11.6d) Image below (2021-12-17.172) was taken 11.6 days after discovery of 2021agco Position of reported SN (very faint) is shown by white cross-hairs

Annotated CCD Image  (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 04:17 UT (#942298-301) 12" LX200R (at f/10.4) + ST-10XME Non-guided

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

Images of SN 2021agco (UGC 3855) on Supernovae 2021 Page >>

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NGC 3310 - Spiral Galaxy  (Herschel IV-60) with Type II Supernova 2021gmj

NGC 3310 / Herschel IV-60 with SN 2021gmj (Ursa Major) SN 2021gmj (Type: II) discovered 2021/03/20.320 UT by DLT40 Alias: ZTF21aaqgmjt, ATLAS21izq  ( Rochester Supernova site |  Gianluca Masi image)

NGC 3310 with SN 2021gmj - 2021-12-17 (T+271.9d) Image below (2021-12-17.187) was taken 271.9 days after discovery of 2021gmj SN is no longer visible

CCD Image (100% size, log scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 04:40 UT (#942305-08) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

NGC 3310 with SN 2021gmj - Earlier Image, 2021-03-24 (T+4.6d) Image below (2021-03-24.915) was taken 4.6 days after discovery of 2021gmj SN position indicated by white cross-hairs

Annotated CCD Image (100% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-24 22:07 UT (#875043-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021gmj (NGC 3310) on Supernovae 2021 Page >>

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IC 719 - Spiral Galaxy

IC 719 with SN 2021kos (Virgo) IC 791 contained earlier SN 2021kos (Type: Ib) discovered 2021/04/19.226 UT by ZTF Alias: ZTF21aawmdxw, Gaia21ccl Gaia Alert triggered at mag +18.14  ( Rochester Supernova site |  Gaia21ccl )

IC 719  - Spiral Galaxy Image below (2021-12-17.208) was taken 242.0 days after discovery of 2021kos The SN is no longer visible Poor quality image , image was unguided due to a PHD2 problem Target to be rescheduled for a later session

CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 05:09 UT (#942328-32) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

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NGC 3836 - Spiral Galaxy with Type II Supernova 2021aefs (attempt)

NGC 3836 with SN 2021aefs (Crater) SN 2021aefs (Type: II) discovered 2021-11-09.272 UT by Gaia Alias: Gaia21fch Transient Alert triggered at mag +18.36  ( Rochester Supernova site |  Gaia21fch )

NGC 3836 - Spiral Galaxy Poor quality image - single unguided frame / bright sky

CCD Image (100% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-12-17 05:38 UT (#942340) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

NGC 3836 with SN 2021aefs - 2021-12-17 (T+38.0d) Image below (2021-12-17.224) was taken 38.0 days after discovery of 2021aefs Poor quality image - single unguided frame / bright sky

CCD Image (100% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-12-17 05:38 UT (#942340) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

Images of SN 2021aefs (NGC 3836) on Supernovae 2021 Page

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SBS 0951+534 - Galaxy

SBS 0951+534 (Ursa Major) Galaxy had earlier SN 2021hmc (Type: Ia) discovered 2021/03/29.178 UT by ZTF Alias: ZTF18acsremz  ( Rochester Supernova site )

CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-17 05:56 UT (#942344-47) 12" LX200R (at f/10.4) + ST-10XME Non-Guided

SBS 0951+534 - detail Image below (2021-12-17.242) was taken 263.1 days after discovery of SN 2021hmc

CCD Image (125% size, square root scale, cropped) Image details as above Non-Guided

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AT 2021aena - CV Type Transient (Attempt)

AT 2021aena (Corvus) AT 2021aena (Type: CV) discovered 2021-11-11.846 UT by Gaia Alias: Gaia21fdi Transient alert triggered at magnitude +14.56 (vs historic magnitiude +17.51)  ( Rochester Supernova site | Gaia21fdi )

Annotated CCD Image  (50% size, linear scale) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-12-17 06:11 UT (#942351-55) 12" LX200R (at f/10.4) + ST-10XME Unguided

AT 2021aena - 2021-12-17 (T+35.4d) Image below (2021-12-17.255) was taken 35.4 days after discovery of 2021aena Reported position of transient (not visible) is shown by white circle Star has most-likely faded back to its usual brightness +17.5

Annotated CCD Image  (100% size,  linear scale, cropped) Image details as above Unguided

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