David's Astronomy - Images 2024-09-12 (S1242)

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Images - Session 1242 (2024-09-12)

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Objects Session Notes

V0669 Cep - Variable Star / Reflection Nebula

T CrB - Variable Star

AT 2021afdl - CV Type Transient   (non-detection)

AT 2022absk - CV Type Transient   (non-detection)

AT 2023csw - CV Type Transient

AT 2023dwm - CV Type Transient

AT 2023uqd - Type YSO? Transient (near V0669 Cep & LDN 1196)

AT 2023abqc - CV Type Transient (non-detection)

AT 2024eja - Type YSO? Transient

AT 2024jqo - CV Type Transient (non-detection)

AT 2024jri - Transient (non-detection)

AT 2024koe - Transient in M31 (non-detection)

LDN 1196 - Dark Nebula

M31 - Spiral Galaxy with EGN Transient AT 2023yoa

M33 - Spiral Galaxy with Nova M33 2024-08a?

NGC 3073 - Elliptical Galaxy with Transient AT 2024unf (unconfirmed)

NGC 3206 - Spiral Galaxy with Type IIn Supernova 2024bch

NGC 7253B - Spiral Galaxy with Type Ia Supernova 2023wuk

Variable Stars (photometric monitoring)

- RX And, T CrB, SS Cyg, BL Lac, CY Lyr, KIC 8462852

Nearby Stars (astrometric monitoring)

- Groombridge 34



- All-Night Session (6.6 hr)

- 12" LX200 + ST-10XME for imaging

- TS 80mm APO + ZWO ASI178MC for guiding & imaging

- Ambient Temperature: 4°C (min)

- CCD Temperature:   -20°C

- Notes from 2024-09-12 >>

- Aurora Images/Video from night, 2024-09-12 >>
North Panorama

Observing Result

V0669 Cep - Variable Star / Reflection Nebula

V0669 Cep (Cepheus)
Star is surrounded by reflection nebula
Star lies next to dark nebula LDN 1196 ( LDN 1196 )

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 02:54 UT (#1242154-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

V0669 Cep - Detail

Annotated CCD Image (150% size, square root scale, cropped)
Image details as above

AT 2021afdl - CV Type Transient (non-detection)

AT 2021afdl (Pegasus)
AT 2021afdl (Type: CV) discovered 2021-11-22.240 UT by Gaia
Alias: Gaia21fgm
Alerting magnitude 15.22 (vs Historic magnitude 18.78)
Outburst in candidate CV, previous outburst reported in Gaia15abf
( TNS 2021afdl | Gaia21fgm )

AT 2021afdl - 2024-09-13 (T+1025.8d)
Image below (2024-09-13.031) was taken 1025.8 days after discovery of 2021afdl
Position of earlier transient (not visible or barely visible ?) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.5 (Clear Filter)
Object is likely at it's normal lowstand magnitude level (mag 19.2 to 20.0)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 00:52 UT (#1242103-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021afdl on Transients 2021 Page >>

AT 2022absk - CV Type Transient (non-detection)

AT 2022absk (Perseus)
AT 2022absk (Type: CV) discovered 2022-11-26.216 UT by ZTF
Alias: ZTF22abwwdbv
Discovery Mag +15.92 (r-ZTF Filter)
( TNS 2022absk )

AT 2022absk - 2024-09-13 (T+656.9d)
Image below (2024-09-13.097) was taken 656.9 days after discovery of 2022absk
Position of earlier transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 02:23 UT (#1242139-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022absk on Transients 2022 Page >>

AT 2023csw - CV Type Transient

AT 2023csw (Vulpecula)
AT 2023csw (Type: CV) discovered 2023-03-03.202 UT by Gaia
Alias: Gaia23ayn
Alerting Magnitude 16.88 (G-Gaia Filter)
vs Historic Magnitude 17.15 +/- 0.05 (SD)
~0.2 mag rise in red Gaia source
( TNS 2023csw | Gaia15abf )

AT 2023csw - 2024-09-12 (T+559.7d)
Image below (2024-09-12.938) was taken 559.7 days after discovery of 2023csw
Position of earlier transient (very faint) is shown by white cross-hairs
Measured Magnitude +16.92 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 22:34 UT (#1242038-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023csw on Transients 2023 Page >>

AT 2023dwm - CV Type Transient

AT 2023dwm (Cygnus)
AT 2023dwm (Type: CV) discovered 2023-03-24.595 UT by MASTER
Alias: MASTER OT J203050.57+554708.9
Discovery Magnitude 12.6 (Clear Filter)
( TNS 2023dwm )

AT 2023dwm - 2024-09-12 (T+538.4d)
Image below (2024-09-12.954) was taken 538.4 days after discovery of 2023dwm
Position of reported transient (brightening ?) is shown by white cross-hairs
Measured magnitude +13.81 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 22:56 UT (#1242054-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023dwm on Transients 2023 Page >>

AT 2023uqd - Type YSO? Transient

AT 2023uqd (Cepheus)
AT 2023uqd (Type: YSO?) discovered 2023-10-08.320 UT by Gaia
Alias: Gaia23cuk
Alerting Magnitude 15.49 (G-Gaia Filter)
vs Historic Magnitude 16.58 +/- 0.33 SD
Brightening in candidate YSO
( TNS 2023uqd | Gaia23cuk )

AT 2023uqd - 2024-09-13 (T+340.8d)
Image below (2024-09-13.115) was taken 340.8 days after discovery of 2023uqd
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +16.01 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 02:54 UT (#1242154-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023uqd on Transients 2023 Page >>

AT 2023abqc - CV Type Transient (non-detection)

AT 2023abqc (Cygnus)
AT 2023abqc (Type: CV) discovered 2023-12-25.743 UT by Gaia
Alias: Gaia23duj
Discovery Magnitude 16.86 (G-Gaia Filter)
vs Historic Magnitude 19.95 +/- 1.38 SD
Outburst in candidate CV ASASSN-19mf
( TNS 2023abqc | Gaia23duj )

AT 2023abqc - 2024-09-12 (T+262.3d)
Image below (2024-09-12.997) was taken 262.3 days after discovery of 2023abqc
or around 10 days after last outburst on c. 2024-09-01
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.2 (Clear Filter)
The image below confirms that the new outburst in this candidate CV is over and it is heading
towards its normal Low Stand Magnitude range +20.2 to +21.1 (range based on Gaia data)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 23:58 UT (#1242078-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023abqc on Transients 2023 Page >>

AT 2024eja - Type YSO? Transient

AT 2024eja (Monoceros)
AT 2024eja (Type: YSO?) discovered 2024-03-13.147 UT by Gaia
Alias: Gaia24ayy
Discovery Magnitude 12.70 (G-Gaia Filter)
vs Historic Magnitude 12.29 +/- 0.04 SD
Dimming in candidate YSO
( TNS 2024eja | Gaia24ayy )

AT 2024eja - 2024-09-13 (T+184.0d)
Image below (2024-09-13.161) was taken 184.0 days after discovery of 2024eja
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +12.18 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 03:56 UT (#1242183-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024eja on Transients 2024 Page >>

AT 2024jqo - CV Type Transient (non-detection)

AT 2024jqo (Delphinus)
AT 2024jqo (Type: CV) discovered 2024-05-27.803 UT by XOSS
Alias: KATS24K004, TCP J20182208+1551176
Discovery Magnitude 16.66 (Clear Filter)
( TNS 2024jqo )

AT 2024jqo - 2024-09-12 (T+108.1d)
Image below (2024-09-12.926) was taken 108.1 days after discovery of 2024jqo
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 22:17 UT (#1242030-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024jqo on Transients 2024 Page >>

AT 2024jri - Transient (non-detection)

AT 2024jri (Andromeda)
AT 2024jri (Type: unk) discovered 2024-05-27.747 UT by MASTER
Alias: MASTER OT J000024.64+332541.8
Discovery Magnitude 15.7 (Clear Filter)
( TNS 2024jri )

AT 2024jri - 2024-09-13 (T+108.3d)
Image below (2024-09-13.069) was taken 108.3 days after discovery of 2024jri
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 01:48 UT (#1242125-29)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024jri on Transients 2024 Page >>

AT 2024koe - Transient in M31 (non-detection)

AT 2024koe (Andromeda)
AT 2024koe (Type: unk) discovered 2024-06-08.412 UT by GEOTS
Alias: GEOTS-Balaji-2024-008
Discovery Magnitude 16.8 (Other Filter)
( TNS 2024koe )

AT 2024koe - 2024-09-13 (T+96.6d)
Image below (2024-09-13.047) was taken 96.6 days after discovery of 2024koe
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.7 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 01:17 UT (#1242110-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024koe (in M31) on Transients 2024 Page >>

LDN 1196 - Dark Nebula

LDN 1196 (Cepheus)
[ Dark Nebula ]

The star at centre of image, surrounded by a reflection nebula, is V0669 Cep

Annotated CCD Image (70% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 02:54 UT (#1242154-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (70% size, square root scale)
Image details as above

M31 - Spiral Galaxy with EGN Transient AT 2023yoa

M31 with Nova M31 AT 2023yoa (Andromeda)
AT 2023yoa (Type: EGN) discovered 2023-11-27.831 UT by XOSS
Alias: PSP23N, PNV J00430932+4115416, Nova M31 2023-11f
Discovery Mag 16.2 (Clear filter)
( TNS 2023yoa )

Nova M31 AT 2023yoa - 2024-09-13 (T+290.3d)
Image below (2024-09-13.082) was taken 290.3 days after discovery of 2023yoa
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 02:07 UT (#1242132-36)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023yoa - Earlier Image, 2023-11-30 (T+3.0d)
Image below (2023-11-30.831) was taken 3.0 days after discovery of 2023yoa
Position of reported transient (very faint) is shown by white cross-hairs
Estimated Magnitude +16.5* (Clear Filter) * uncertain estimate

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 20:04 UT (#1169041-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023yoa on Transients 2023 Page >>

M33 - Spiral Galaxy with EGN Transient Nova M33 2024-08a?

M33 with Nova M33 2024-08a? (Triangulum)
Nova M33 2024-08a? (Type: unk) discovered 2024-08-15.373 UT by GEOTS
Alias: PNV J01340281+3042406
Discovery Magnitude 17.2 (Clear Filter)
Possible Nova in M33
( CBAT Nova M33 2024-08a? )

Equivalence of transient position indicates that
AT 2024sgd = Nova M33 2024-08a?

Nova M33 2024-08a? - 2024-09-13 (T+28.8d)
Image below (2024-09-13.142) was taken 28.8 days after discovery of Nova M33 2024-08a?
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +18.01 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 03:32 UT (#1242172-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova M33 2024-08a? (in M33) on Transients 2024 Page >>

NGC 3073 - Elliptical Galaxy with Transient AT 2024unf (Unconfirmed)

NGC 3073 with AT 2024unf (Ursa Major)
AT 2024unf (Type: unk) discovered 2024-09-04.049 UT by Mascola
Discovery Magnitude 15.0 (Other Filter)
vs Prior Non-Detection Limiting Magnitude 15.0
( TNS 2024unf )

NGC 3073 with AT 2024unf - 2024-09-12 (T+8.9d)
Image below (2024-09-12.967) was taken 8.9 days after discovery of 2024unf
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.7 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 23:22 UT (#1242064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024unf (in NGC 3073) on Transients 2024 Page >>

NGC 3206 - Spiral Galaxy with Type IIn Supernova 2024bch

NGC 3206 with SN 2024bch (Ursa Major)
SN 2024bch (Type: IIn) discovered 2024-01-29.252 UT by Patrick Wiggins
Alias: ATLAS24bmx, PS24aap, GOTO24hm
Discovery Magnitude 15.5 ( Clear Filter)
( TNS 2024bch )

NGC 3206 with SN 2024bch - 2024-09-12 (T+227.7d)
Image below (2024-09-12.981) was taken 227.7 days after discovery of 2024bch
Position of reported SN (faint) is indicated by white cross-hairs.
Measured Magnitude +16.37 (Clear Filter)
Poor quality image (poor sky transparency / cloud)

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 23:39 UT (#1242071-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3206 with SN 2024bch - Earlier Image 2024-02-14 (T+15.8d)
Image below (2024-02-14.083) was taken 15.8 days after discovery of 2024bch
Position of reported SN (relatively bright & distinct) is indicated by white cross-hairs.
Measured Magnitude +13.10 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-14 02:09 UT (#1185189-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024bch (in NGC 3206) on Supernova 2024 Page >>

NGC 7253B - Spiral Galaxy with Type Ia Supernova 2023wuk

NGC 7253B with SN 2023wuk (Pegasus)
SN 2023wuk (Type: Ia) discovered 2023-11-06.132 UT by ZTF
Alias: ZTF23abooocr
Discovery Magnitude 18.96 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 20.29
( TNS 2023wuk )

NGC 7253A & NGC 7253B - Detail

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-09-13 00:15 UT (#1242085-89)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7253B with SN 2023wuk - 2024-09-13 (T+311.9d)
Image below (2024-09-13.004) was taken 311.9 days after discovery of 2023wuk
Position of reported Supernova (probably no longer visible) is shown by white cross-hairs
Unclear if the object at cross-hairs is SN at T309.9d or merely part of the nucleus

Images of SN 2023wuk (in NGC 7253B) on Supernova 2023 Page >>

T CrB - Variable Star

T CrB (Corona Borealis)
Alias: GCVS T CrB, HIP 78322, SAO 84129, HD 143454
Max Magnitude 2.0
Min Magnitude 10.8
Spectral: M3III+pec(NOVA)
( VSX T CrB )

T CrB

Annotated CCD Image (70% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 22:49 UT (#1242047-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

More Images of T CrB >>

T CrB (V Band) - 2024-09-12

T CrB - Photometry - 2024-09-12

Altitude 27.4, Airmass 2.175

Star	Id	V Mag (ref)	V Mag (instr)	V Mag (calc)	B Mag (ref)	B-V (ref)	B Mag (instr)	B Mag (calc)	B-V (calc)
C Star	98	9.809	-12.814		10.843	1.034	-11.593
K Star	112	11.166	-11.539	11.08	11.779	0.613	-10.754	11.69	0.60
Var. Star	T CrB		-12.697	9.93	-		-11.351	11.09	1.16

Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-12 21:56 UT (#1242017-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-12 21:55 UT (#1242016-20)

More Images & Data for T CrB >>

This Web Page:	Images - Session 1242 (2024-09-12)
Last Updated :	2024-10-23
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages Images - Session 1242 (2024-09-12)