David's Astronomy Pages Images - Session 1257 (2024-10-19)

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Images (S1257)

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Session Notes

13P/Olbers - Comet C/2021 S3 (PANSTARRS) - Comet C/2022 E2 (ATLAS) - Comet C/2023 A3 (Tsuchinshan-ATLAS) - Comet     T CrB - Variable Star     AT 2021aggy - CV Type Transient AT 2022wel - Type YSO? Transient (in Berkeley 95) AT 2023ay - Type ulens? Transient AT 2023cqw - Type ulens? Transient AT 2023rdg - Type Blazar Transient AT 2023rrr - Type QSO Transient (QSO J0136+4751) AT 2023vqz - Type QSO Transient in WISEA Galaxy     AT 2024iim - Type YSO Transient   (non-detection) AT 2024uun - CV Type Transient   (non-detection) AT 2024xhn - Type Nova? Transient AT 2024xpy - Type BL Transient AT 2024yej - Type CV? Transient     LEDA 2266307 - Galaxy with Type Ia Supernova 2024xjk  (non-detection) LEDA 2514988 - Galaxy with Type Ia Supernova 2023qb  (non-detection) M31 - Spiral Galaxy with Transient AT 2023hrm  (non-detection) M33 - Spiral Galaxy with Nova M33 2024-08a?  (non-detection)       - AT2024xig & SN 2024wak attempts failed (due to cloud & bad guiding)     Variable Stars (photometric monitoring) - T CrB, CI Cyg, BL Lac, RR Tau, ER UMa     Nearby Stars (astrometric monitoring) - Barnards Star, DX Cnc

- Attempted Night Session (9.5 hrs),. Ended earlier by cloud (the approach of Storm Ashley).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 6.5°C (min) - CCD Temperature:  -15°/-20°C - Notes from 2024-10-19 >>     -

Observing Result

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13P/Olbers - Comet

13P/Olbers - 2024-10-19 (passing through Serpens) Sun Distance 1.99 AU (receeding) Earth Distance 2.82 AU (422.6 million km) Image taken with comet at Altitude: 7.1°, Airmass: 7.69		13P/Olbers - 2024-10-19 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 77.65 arcsec/hr, Dec -46.37 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 6 x 60s exposure (average combine), 3x3 binning, C Filter 2024-10-19 18:32 UT (#1257042-47) 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) Image details as left
Images of 13P/Olbers on Comets 2024 Page >>

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C/2021 S3 (PANSTARRS) - Comet

C/2021 S3 (PANSTARRS) - 2024-10-19 (passing through Cygnus) Sun Distance 3.50 AU  (receeding) Earth Distance 3.20 AU (478.6 million km)		C/2021 S3 (PANSTARRS) - 2024-10-19 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 38.69 arcsec/hr, Dec -35.05 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 23:49 UT (#1257180-86) 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) Image details as left
Images of C/2021 S3 (PANSTARRS) on Comets 2024 Page >>

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C/2022 E2 (ATLAS) - Comet

C/2022 E2 (ATLAS) - 2024-10-19 (passing through Lynx) Sun Distance 3.68  AU (receeding) Earth Distance 3.36 AU (502.1 million km)		C/2022 E2 (ATLAS) - 2024-10-19 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -49.46 arcsec/hr, Dec 50.60 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 5 x 90s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 23:34 UT (#1257173-77) 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) Image details as left
Images of C/2022 E2 (ATLAS) on Comets 2023 Page >>
Images of C/2022 E2 (ATLAS) on Comets 2024 Page >>

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19 (passing through Serpens) Sun Distance 0.69 AU (receeding) Earth Distance 0.58 AU (86.7 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 519.61 arcsec/hr, Dec 43.03 arcsec/hr)
Annotated CCD Image (50% size, log scale) 2 x 5s exposure (average combine), 3x3 binning, C Filter 2024-10-19 18:13 UT (#1257022-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, log scale, cropped) 11 x 5s exposure (average combine), 3x3 binning, C Filter 2024-10-19 18:14 UT (#1257022-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19
False Color CCD Image (50% size, log scale) 11 x 5s exposure (average combine), 3x3 binning, C Filter 2024-10-19 18:14 UT (#1257022-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		False Color CCD Image (100% size, log scale, cropped) Image details as left
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19
IPhone Colour Image (12% size, natural view) 3s exposure, img 7378 2024-10-19 18:16 UT (19:16 BST)
IPhone Colour Image (12% size, night mode) 3s exposure, img 7378 2024-10-19 18:16 UT (19:16 BST)
IPhone Colour Image (12% size, natural view) 3s exposure, img 7384 2024-10-19 18:16 UT (19:16 BST)		IPhone Colour Image (12% size, night mode) 3s exposure, img 7384 2024-10-19 18:16 UT (19:16 BST)
C/2023 A3 (Tsuchinshan-ATLAS) - 2024-10-19
CMOS Colour Image (16% size, asinh scale) 15 x 10s exposure (stacked), 1x1 binning, OSC 2024-10-19 18:44 UT (#1256132-36) TS 80mm APO, ZWO ASI178MC Auto-guided using 12" LX200 + ST10-XME & PHD2 [ larger image, 32% scale ]

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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 (V Band) - 2024-10-19 (S1257)		T CrB - Photometry - 2024-10-19
		2024-10-19 18:55 UT Altitude: 32.0°, Airmass: 1.885 T CrB  : 10.24 (V Mag), 11.55 (B Mag),  1.31 (B-V)
Annotated CCD Image (50% size, linear scale) 3 x 20s exposure (average combine), 3x3 binning, V Filter 2024-10-19 18:55 UT (#1257053-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (not shown) 3 x 30s exposure (average combine), 3x3 binning, B Filter 2024-10-19 18:54 UT (#1257052-56)
More Images & Data for T CrB >>

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AT 2021aggy - CV Type Transient

AT 2021aggy (Aquila) AT 2021aggy (Type: CV) discovered 2021-12-12.396 UT by Gaia Alias: Gaia21fno Alerting Magnitude 15.74 (G-Gaia Filter) vs Historic Magnitude 15.91 +/-0.06 SD Gaia source brightens by 0.2 mag over 17 months ( TNS 2021aggy | Gaia21fno )

AT 2021aggy - 2024-10-19 (T+1042.5d) Image below (2024-10-19.847) was taken 1042.5 days after discovery of 2021aggy Positon of earlier transient (faint) is shown by white cross hairs.   Measured magnitude +15.52 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 20:22 UT (#1257102-06) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021aggy on Transients 2021 Page >>

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AT 2022wel - Type YSO? Transient (in Berkeley 95)

AT 2022wel (Cepheus) AT 2022wel (Type: YSO?) discovered 2022-09-26.353 UT by Gaia Alias: Gaia22eav Alerting Magnitude 15.20 (G-Gaia Filter) vs Historic Magnitude 15.46 +/- 0.03 SD Bright red gal.plane source rises by 0.3 mag, coincident with candidate YSO [ TNS 2022wel | Gaia22eav ]

AT 2022wel - 2024-10-19 (T+754.6d) Image below (2024-10-19.948) was taken 754.6 days after discovery of 2022wel Position of earlier transient (distinct, brightened slightly) is shown by white cross-hairs Measured Magnitude +14.52

Annotated CCD Image (125% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 22:54 UT (#1257156-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022wel on Transients 2022 Page >>

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AT 2023ay - Type ulens? Transient

AT 2023ay (Vulpecula) AT 2023ay (Type: ulens?) discovered 2023-01-04.279 UT by Gaia Alias: Gaia23acg Alerting Magnitude 16.09 (G-Gaia) vs Historic Magnitude 16.36 +/- 0.08 SD Gal.plane source candidate microlensing event [ TNS 2023ay | Gaia23acg ]

AT 2023ay - 2024-10-19 (T+654.6d) Image below (2024-10-19.878) was taken 654.6 days after discovery of 2023ay Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +16.15

Annotated CCD Image (125% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 21:12 UT (#1257123-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ay on Transients 2023 Page >>

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AT 2023cqw - Type ulens? Transient

AT 2023cqw (Cygnus) AT 2023cqw (Type: ulens?) discovered 2023-02-26.439 UT by Gaia Alias: Gaia23awr Alerting Magnitude 14.24 (G-Gaia Filter) vs Historic Magnitude 14.52 +/- 0.08 SD Bright gal.plane source candidate microlensing event or Be-type outburst rises by 0.3 mag [ TNS 2023cqw | Gaia23awr ]

AT 2023cqw - 2024-10-19 (T+601.5d) Image below (2024-10-19.894) was taken 601.5 days after discovery of 2023cqw Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude +14.13

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 21:36 UT (#1257130-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023cqw on Transients 2023 Page >>

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AT 2023rdg - Type Blazar Transient

AT 2023rdg (Cetus) Alias: In WISEA J021216.88-022155.7 AT 2023rdg (Type: Blazar) discovered 2023-08-20.495 UT by Gaia Alias: Gaia23cay Alerting Magnitude 16.57 (G-Gaia Filter) vs Historic Magnitude 17.73 +/- 0.40 SD Low State Magnitude 18.1 to 19.1 Brightening in known Blazar [ TNS 2023rdg | Gaia23cay ]

AT 2023rdg - 2024-10-20 (T+426.5d) Image below (2024-10-20.017) was taken 426.5 days after discovery of 2023rdg Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude +17.02

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-20 00:31 UT (#1257196-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023rdg on Transients 2023 Page >>

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AT 2023rrr - Type QSO Transient (QSO J0136+4751)

AT 2023rrr (Andromeda) AT 2023rrr (Type: QSO) discovered 2023-09-02.139 UT by Gaia Alias: Gaia23cfc Discovery Magnitude 16.04 (G-Gaia Filter) vs Historic Mag 18.43 +/- 0.778 SD Brightening in known QSO  (QSO J0136+4751) Gaia, 2022-02-24 22:20, mag 18.78 Gaia, 2023-08-08 21:24, mag 17.19 Gaia, 2023-09-02 03:20, mag 16.04 Gaia, 2023-12-08 08:00, mag 17.15 Gaia, 2023-12-16 06:19, mag 17.80  ( TNS 2023rrr | Gaia23cfc )

AT 2023rrr - 2024-10-19 (T+413.9d) Image below (2024-10-19.998) was taken 413.9 days after discovery of 2023rrr Position of reported transient (very faint, brightening ?) is shown by white cross-hairs Measured Magnitude +17.01 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-20 00:02 UT (#1257189-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rrr - Earlier Image 2023-11-15 (T+74.8d) Image below (2023-11-15.976) was taken 74.8 days after discovery of 2023rrr Position of reported transient (faint but relatively distinct) is shown by white cross-hairs Measured Magnitude +17.26 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-11-15 23:33 UT (#1167209-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023rrr on Transients 2023 Page >>

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AT 2023vqz - Type QSO Transient in WISEA Galaxy

AT 2023vqz (Auriga) In WISEA J064410.86+354644.6 AT 2023vqz (Type: QSO) discovered 2023-10-16.370 UT by Gaia Alias: Gaia23cxv Discovery magnitude 15.39 (G-Gaia Filter)  vs Historic magnitude 16.31 +/- 0.25 SD Brightening in known QSO Gaia, 2019-04-11 18:20, mag 16.08 Gaia, 2020-03-13 07:16, mag 15.90 Gaia, 2023-04-09 20:40, mag 15.50 Gaia, 2023-10-16 10:40, mag 15.41 ( Whilst discovery alert only triggered on 2023-10-16 (at Historic Mag - 3 *SD)  the QSO has been brighter than normal range (16.0-16.6) since 2020-03-13  )  ( TNS 2023vqz | Gaia23cxv )

AT 2023vqz - 2024-10-20 (T+369.7d) Image below (2024-10-20.096) was taken 369.7 days after discovery of 2023vqz Position of reported transient (faint but distinct) is shown by white cross-hairs Measured Magnitude + 15.05 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-20 02:21 UT (#1257253-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023vqz (in WISEA Galaxy) on Transients 2023 Page >>

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AT 2024iim - Type YSO Transient (non-detection)

AT 2024iim (Orion) AT 2024iim (Type: YSO) discovered 2024-05-01.620 UT by Gaia Alias: Gaia24bhy Alerting Magnitude 16.77 (G-Gaia Filter) vs Historic Magnitude 17.56 +/-0.12 SD Brightening in known YSO ( TNS 2024iim | Gaia24bhy )

AT 2024iim - 2024-10-20 (T+171.5d) Image below (2024-10-20.083) was taken 171.5 days after discovery of 2024iim Positon of earlier transient (not visible, probably faded ?) is shown by white cross hairs. Non-Detection Limiting Magnitude +17.5 (Clear Filter)   Poor quality image (bright sky background)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-20 02:07 UT (#1257247-50) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024iim on Transients 2024 Page >>

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

AT 2024uun (Aquila) AT 2024uun (Type: CV) discovered 2024-09-03.569 UT by MASTER Alias: MASTER OT J200038.43+133129.1 Alerting Magnitude 14.6 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.2 ( TNS 2024uun )

AT 2024uun - 2024-10-19 (T+46.3d) Image below (2024-10-19.853) was taken 46.3 days after discovery of 2024uun Positon of earlier transient (not visible, probably faded ?) is shown by white cross hairs. Non-Detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 20:31 UT (#1257109-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024uun on Transients 2024 Page >>

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AT 2024xhn - Type Nova? Transient

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AT 2024xpy - Type BL Transient

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AT 2024yej - Type CV? Transient

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LEDA 2266307 - Galaxy with Type Ia Supernova 2024xjk (non-detection)

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LEDA 2514988 - Galaxy with Type Ia Supernova 2023qb (non-detection)

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M31 - Spiral Galaxy with Transient AT 2023hrm (non-detection)

M31 with AT 2023hrm (Andromeda) AT 2023hrm (Type: unk) discovered 2023-05-07.872 UT by XOSS Alias: XM98MZ, PNV J00424488+4115033 Discovery Magnitude 16.6 (Clear Filter)  ( TNS 2023hrm )

M31 with AT 2023hrm (T+531.0d) Cam2 Reference Image Position of AT 2023hrm (not visible in this exposure) is shown by blue circle Limits of M31 Spiral Galaxy is shown by white ellipse (bottom left-hand corner)

Annotated CMOS Image (16% size) (10s exposure, 1x1 binning) 2024-10-19 22:00 UT (23:00 BST) TS 80mm APO, ZWO ASI178MC

M31 -Spiral Galaxy with AT 2023hrm (T+531.0d)

Annotated CCD Image (70% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 22:09 UT (#1257142-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023hrm - 2024-10-19 (T+531.0d) Image below (2024-10-19.917) was taken 531.0 days after discovery of 2023hrm Position of earlier transient (faded & no longer visible) is shown by white cross-hairs  Non-Detection Limiting Magnitude +17.2 (Clear Filter)

Annotated CCD Image (125% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-10-19 22:09 UT (#1257142-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023hrm (in M31) on Transients 2023 Page >>

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M33 - Spiral Galaxy with EGN Transient Nova M33 2024-08a? (non-detection)

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