David's Astronomy Pages Images - Session 1013 (2022-05-30)

Images (S1012)

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Images (S1014)

Objects	Session Notes
C/2017 K2 (PANSTARRS) - Comet     AT 2022bj - CV Type Transient AT 2022jrp - CV Type Transient (UG Candidate)     NGC 4545 - Spiral Galaxy with Type II Supernova 2022fuc NGC 4647 - Spiral Galaxy with Type Ia (? Type Ib) Supernova 2022hrs     Variable Stars (photometric monitoring) - SS Cyg, BL Lac, AM Her      Nearby Stars (astrometric monitoring) - Barnards Star	- All night session (2.8 hours) - Summer twilight conditions     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 3.0°C (min) - CCD Temperature:  -20°C - Notes from 2022-05-30 >>

C/2017 K2 (PANSTARRS) - Comet

C/2017 K2 (PANSTARRS) (passing through Ophiuchus) Sun Distance 3.04 AU (approaching) Earth Distance 2.21 AU (330.7 million km)		C/2017 K2 (PANSTARRS) - 2022-05-31 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -53.47 arcsec/hr, Dec -21.18 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2022-05-31 00:02 UT (#1013027-29) 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 2022-05-31 00:05 UT (#1013027-35) 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 >>
Images of C2017 K2 (PANSTARRS) on Comets 2022 Page >>

C/2017 K2 (PANSTARRS)  - False Colour Image Inverse Spectrum

C/2017 K2 (PANSTARRS)  -  2022-05-31

False Colour CCD Image (70% size, log scale) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2022-05-31 00:05 UT (#1013027-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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AT 2022bj - CV Type Transient

AT 2022bj (Hercules) AT 2022bj (Type: CV) discovered 2022-01-04.426 UT by Gaia Alias: Gaia22abp [ TNS 2022bj | Gaia22abp ]

AT 2022bj - 2022-05-31 (T+146.6d) Image below (2022-05-31.049) was taken 146.6 days after discovery of 2022bj Position of reported transient (very faint, almost invisible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2022-05-31 01:14 UT (#1013079-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

Images of AT 2022bj on Transients 2022 Page

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AT 2022jrp - CV Type Transient (UG Candidate)

AT 2022jrp (Bootes) AT 2022jrp (Type: CV) discovered 2022-05-09.812 UT by XOSS Alias: XM116HT Discovery Magnitude +12.8 ' Classification : CV Type (Spectrum shows a blue continuum with H alpha in emission at zero redshift) ' Rochester Supernova site | TNS 2022jrp | XM116HT Discovery)

AT 2022jrp - 2022-05-30 (T+21.2d) Image below (2022-05-30.992) was taken 21.2 days after discovery of 2022jrp Position of reported transient is shown by white cross-hairs Measured magnitude +15.93 (fading)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-05-30 23:52 UT (#1013020-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022jrp on Transients 2022 Page >>

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NGC 4545 - Spiral Galaxy with Type II Supernova 2022fuc

NGC 4545 with SN2022fuc (Draco) SN 2022fuc (Type: II) discovered 2022-04-02.878 UT by Giancarlo Cortini Alias: ATLAS22lhg, ZTF22aadpuwe Discovery Magnitude 17 ' Past image of the same field taken on 2022/03/03.98 showed nothing at that position (limit mag.+18.5) '  ( Rochester Supernova site | TNS 2022fuc )

NGC 4545 with SN 2022fuc - 2022-05-31 (T+58.2d) Image below (2022-05-31.028) was taken 58.2 days after discovery of 2022fuc Position of SN (faint but distinct) is shown by white cross-hairs Measured magnitude +15.67 Poor quality image (due to bright twilight sky)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-05-31 00:50 UT (#1013055-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022fuc (NGC 4545) on Supernovae 2022 Page >>

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NGC 4647 - Spiral Galaxy with Type Ia (? Type Ib) Supernova 2022hrs

NGC 4647 with SN2022hrs (Virgo) SN 2022hrs (Type: Ia) discovered 2022-04-16.619 UT by Koichi Itagaki Alias: ATLAS22mip Discovery Magnitude 15 (Clear Filter)  ( Rochester Supernova site | TNS 2022hrs | Forth Image) Whilst TNS Classification records 2022hrs as a Type Ia SN, spectra taken earlier with my equipment  (2022-04-27.913) suggest that it is actually a Type Ib SN

NGC 4647 with SN 2022hrs - 2022-05-30 (T+44.4d) Image below (2022-05-30.970) was taken 44.4 days after discovery of 2022hrs Position of SN (bright) is shown by white cross-hairs Measured magnitude +13.75 (fading)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-05-30 23:27 UT (#1013010-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022hrs (NGC 4647) on Supernovae 2022 Page >>

SN2022hrs Spectra - 2022-05-30 (T+44.4d) Very poor quality spectra due to bright twilight sky

Spectra produced in AstroMain using Image taken with Star Analyser 200 3 x 180s exposure (average combine), 2x2 binning, S Filter 2022-05-30 23:40 UT (#1013015-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN2022hrs Classification

The classification of the spectra from SN 2022hrs was discussed earlier following acquistion of spectral images taken 2022-04-27, S1004 (see classification discussion) Although the TNS classification is recorded as Type 1a Supernova, my analysis suggests that SN 2022hrs it is actually a Type  Ib supernova due to absence of Si line at 6150 A and presence of distinct (He) absorption line at 5876 A.

Images of SN 2022hrs (NGC 4647) on Supernovae 2022 Page >>

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