David's Astronomy Pages CCD Images - Session 909 (2021-08-27)

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Session Notes

Nova Cas 2021 - Nova (V1405 Cas) NGC 7767 - Spiral Galaxy with AT2021kni Nova Per 2020 - Nova (V1112 Per, AT2020abap) UGC 505 - Spiral Galaxy with Type Ia Supernova 2021ukt 15P/Finlay - Comet UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw UGC 3240 - Spiral Galaxy with Type Ia Supernova 2021vau        - 2 Pallas attempt failed (incorrect position)      Variable Stars (photometric monitoring) - RX And, U And, Z And, CI Cyg, SS Cyg, BL Lac, DY Per - SS Cyg attempt failed (cloud)      Nearby Stars (astrometric monitoring) - HH And, 61 Cyg, Groombridge 34, EV Lac

- All Night Session (6.4 hours). - Main aims of the session were to acquire a selection of targets as conditions allowed - Early issues due to Observer errors (lens cap left on, action leading to cable wrap/scope to power off) - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 5°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2021-08-27 >>    [ Local Files >> ]   -   - Aurora Images/Video from 2021-08-27 >>

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 - 2021-08-27 (T+162.6d) Image below (2021-08-27.990) was taken 150.9 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +7.94 Note: star object is saturated and shows some blooming, mag is probably underestimated (linked with Detection Threshold = 50)

CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-08-27 23:46 UT (#909081-85) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-08-27 (T+162.6d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-08-27 23:49 UT (#909086-90) 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 >>

Nova Cas 2021 (V1405 Cas) Spectra - Calibrated .  Calibrated using two point calibration in RSpec 2.0.0 1) Zero Order Star at 0 and 2) Ha emission line at 6563 A.  Giving calibration scale of 25.5 Angstroms/pixel

Spectra produced in RSpec 2.0.0 using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-08-24 00:57 UT (#907051-55) 12" LX200R (at f/10.4) + ST-10XME

Nova Cas 2021 (V1405 Cas) Spectra - Corrected .  Calibrated Spectra corrected using Instrument Response determined from Reference Star HIP 115566 / SAO 20610 (Type B9III) taken at same altitude (85 deg) as Nova Cas 2021 V1405 Cas is reported to have a Classical Nova Spectrum cf. V1405 Cas Spectrum by Raymond Kneip, 2021-03-19

Spectra produced in RSpec 2.0.0 using Image taken with Star Analyser 200 Image details as above

Spectra produced in RSpec 2.0.0 using Images taken with Star Analyser 200 Displayed using RSpec Presentation Manager Image details as above

Images of Nova Cas 2021 on Novae Page >>

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NGC 7767 - Spiral Galaxy with AT2021kni (unconfirmed)

NGC 7767 with AT2021kni (Pegasus) AT2021kni (Type: unk) discovered 2021/04/26.766 UT by Koichi Itagaki Alias: PSN J23505558+2705349, Gaia21cvt ( Rochester Supernova site | Discovery Image | Enrico Prosperi image | Gaia21cvt )

NGC 7767 with AT2021kni - 2021-08-28 (T+123.2d) Image below (2021-08-28.006) was taken 123.2 days after discovery of 2021kni Position of reported transient is shown by white circle. No clear definitive evidence of object at reported position. Transient AT2021kni has probably faded to below limiting magnitude of image (~ +18.0) Gaia observations (Gaia21cvt) on 2021-08-06 indicate that AT2021kni had faded to +19.74

CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 00:18 UT (#909107-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT2021kni (NGC 7767) on Supernovae 2021 Page >>

NGC 7767 and adjacent galaxies (Part of Abell 2666) - Wide View NGC 7767 (catalog mag +13.5), NGC 7768 (catalog mag +12.3), NGC 7765 (catalog mag +14.7), NGC 7766 (catalog mag +16.7), PGC 1798869 (catalog mag +17.3)

CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 00:18 UT (#909107-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7767 and adjacent galaxies (Part of Abell 2666) - Detail

CCD Image (100% size, square root scale, cropped) Image details as above

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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 - 2021-08-28 (T+275.2d) Image below (2021-08-28.028) was taken 275.2 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +15.3 (fading)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2021-08-28 00:46 UT (#909124-27) 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 >>

Nova Per 2020 (V1112 Per) Spectra Very dim spectra, but H-beta and H-alpha emission lines are apparent

Annotated CCD Image (100% size, square root scale, cropped) 4 x 60s exposure (average combine), 2x2 binning, S Filter 2021-08-28 00:52 UT (#909128-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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UGC 505 - Spiral Galaxy with Type Ia Supernova 2021ukt

UGC 505 with SN2021ukt (Cetus) SN 2021ukt (Type: Ia) discovered 2021/07/31.441 UT by ZTF Alias: ZTF21abpxquj, Gaia21dsv ( Rochester Supernova site | Stan Howerton image | Gaia21dsv )

UGC 505 with SN2021ukt - 2021-08-28 (T+27.6d) Image below (2021-08-28.053) was taken 27.6 days after discovery of 2021ukt SN position is shown by white cross-hairs. Measured magnitude +16.0

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 01:26 UT (#909151-55) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021ukt (UGC 505) 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 - 2021-08-28, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 120.55 arcsec/hr, Dec 4.80 arcsec/hr) Comet (faint) shown by white cross-hairs
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-28 01:48 UT (#909160-62) 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)  7 x 60s exposure (average combine), 3x3 binning, C Filter 2021-08-28 01:50 UT (#909160-67) 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 >>

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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 (T+3.5d)

CCD Image  (50% size, square root scale) 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

UGC 2605 with SN2021wvw - 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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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 (T+23.5d)

CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 03:07 UT (#909223-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 3240 with SN2021vau - 2021-08-28 (T+23.5d) Image below (2021-08-28.124) was taken 23.5 days after discovery of 2021vau Supernova shown by white indicator line Measured magnitude +15.7 (SN + Host Nucleus)

CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-08-28 03:07 UT (#909223-27) 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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