David's Astronomy Pages CCD Images - Session 986 (2022-03-16)

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Images (S987)

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Session Notes

C/2020 V2 (ZTF) - Comet     AT2021agpw - CV Type Transient     2MASS J17554042+6551277 - Star (JWST mirror alignment evaluation star) PGC 61099 - Spiral Galaxy     UGC 10566 - Spiral Galaxy with Type Ia Supernova 2022aab      Variable Stars (photometric monitoring) - U Her, SS Her      Nearby Stars (astrometric monitoring) - Barnards Star

- Pre-Dawn session 1.7 hours Session slightly delayed by 'Too Few Stars' - Main objective was to take my own images of the star 2MASS J17554042+6551277 (TYC 4212-1079-1), the star used for fine-phasing the alignment and focusing of the 18 hexagonal mirrors on the JWST space telescope  (Details and JWST picture in 16 Mar press release at https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully).       - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 2°C (min) - CCD Temperature:  -20°C - Notes from 2022-03-16 >>    [ Local Files >> ]

C/2020 V2 (ZTF) - Comet

C/2020 V2 (ZTF) (passing through Ursa Major) Sun Distance 4.89 AU Earth Distance 4.28 AU (640.8 million km)		C/2020 V2 (ZTF) - 2022-03-17, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -76.87 arcsec/hr, Dec 24.77 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 90s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:16 UT (#986003-05) 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 90s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:17 UT (#986003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2020 V2 (ZTF) on Comets 2022 Page >>

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AT2021agpw - CV Type Transient

AT2021agpw (Serpens) AT2021agpw (Type: CV) discovered 2021-12-27.275 UT by MASTER Alias: MASTER OT J155629.78+090149.3 Discovery Mag 10.1 (red long variability ?) [ TNS 2021agpw ]

AT2021agpw - 2022-03-17 (T+79.9d) Image below (2022-03-17.161) was taken 79.9 days after discovery of 2021agpw Reported transient is shown by white cross hairs.   Measured magnitude +12.39

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:55 UT (#986025-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT2021agpw on Transients 2021 Page

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2MASS J17554042+6551277 - Star (JWST mirror alignment evaluation star)

2MASS J17554042+6551277 (Draco) Alias: TYC 4212-1079-1 Image taken of the star used for the fine-phasing alignment and focusing of 18 hexagonal mirrors on the James Webb Space Telescope. (Reference: See NASA press release, 2022-03-16  https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully).   Image is taken through R filter (like the JWST image)

Annotated CCD Image (70% size, square root scale, cropped) 7 x 45s exposure (average combine), 3x3 binning, R Filter 2022-03-17 03:32 UT (#986011-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

2MASS J17554042+6551277  - Focus Profile

2MASS J17554042+6551277 - Closer View (R Filter)

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

CCD Image (125% size, square root scale, cropped) Image details as above (Shown in red, to match the filter colour)

2MASS J17554042+6551277 - (C Filter) North Up

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

2MASS J17554042+6551277 - JWST Image (Image Credits: NASA/STScI) Note:  The JWST image is rotated 80 deg from North

R Filter, taken c. 2022-03-11 [ Full size Image on NASA.gov site ] https://www.nasa.gov/sites/default/files/thumbnails/image/telescope_alignment_evaluation_image_labeled.png

JWST Image with detailed inserts showing some of the faint background stars and galaxies (Base Image Credits : NASA/STScI)

2MASS J17554042+6551277 - Image Cross-Matching

12" LX200 Image - Non aligned Negative, Cropped, Rescaled Raw Image Scale : 1.399"/px,  PictureScale 1.119"/px With picture size of 500 x 336px,   the Cropped Image FOV is 9.325' x  6.266'

Negative CCD Image (125% size, square root scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:41 UT (#986018-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Reference Image (DSS2) DSS2 Image captured through Aladin, Negative, Cropped, Rescaled, This DSS2 image doesn't contain much more detail than my own CCD Image and doesn't help in cross-matching to the JWST image

Reference Image (PanSTARRS) - Detail PanSTARRS DR Image captured through Aladin,  Rescaled, Negative, Rotated 80 deg This PanSTARRS image contains more detail than either my own CCD Image or DSS2 image and shows some of the small galaxies seen in the JWST background Image has to be rotated 80 deg left to align with JWST image

JWST Image - Negative JWST pocket guide ( jwst-pocket-guide.pdf) states the NirCam FOV to be 2 x 132" x 132" with gaps suggesting either 2.2' x 2.2'  or  4.4' x 4.4' as expected FOV sizes Original Picture 5437 x 3438 pixels.  Assuming this is the original image size and that NirCam pixel scale imaging is 0.031 arc sec/px (from  jwst-pocket-guide.pdf) then the Image FOV is 2.809' x  1.776'  Certain artefacts in original full size picture suggest at least one picture join which might explain the difference is the FOV from that initially expected Orientation of JWST image isn't given but has been determined to be rotated 80 deg from north.

(Image Credits: NASA/STScI)

12" LX200 Image - aligned and cross-matched to JWST Image Rectangle shows approximate area equivalent to JWST image My CCD image (10 minute total exposure) shows a couple of the background stars seen in the JWST image but not surprisingly it show none of the faint distant galaxies that JWST can see. On the otherhand outside of JWST field of view, my CCD Image has captured the galaxy PGC 61099 (see image)

Negative CCD Image (125% size, square root scale, rotated 80 deg (left), cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:41 UT (#986018-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

See earlier image of HD 84406 - Star ("JWST mirror alignment star")  from 2022-02-14

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PGC 61099 - Spiral Galaxy

PGC 61099 (Draco) Spiral Galaxy in same field of view as 2MASS J17554042+6551277

Annotated CCD Image (70% size, square root scale) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2022-03-17 03:41 UT (#986018-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PGC 61099 - Detail

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

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UGC 10566 - Spiral Galaxy with Type Ia Supernova 2022aab

UGC 10566 with SN2022aab (Hercules) SN 2022aab (Type: Ia) discovered 2022-01-19.633 UT by ATLAS Alias: ATLAS22ccn  ( Rochester Supernova site | TNS 2022aab )

UGC 10566 with SN2022aab - 2022-03-17 (T+56.5d) Image below (2022-03-17.183) was taken 56.5 days after discovery of 2022aab Position or reported SN (indistinguishable from nucleus) is shown by white cross-hairs Measured magnitude (Nucleus + SN) +15.83

Annotated CCD Image (125% size,square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-03-17 04:32 UT (#986054-58) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022aab (UGC 10566) on Supernovae 2022 Page

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