David's Astronomy Pages Images - Session 1272 (2024-11-18)

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Objects	Session Notes
C/2023 A3 (Tsuchinshan-ATLAS) - Comet     Nova Vul 2024 - Nova (V615 Vul)     AT2023cui - Type YSO? Transient  (non-detection) AT 2023jtn - Transient AT 2024xig - Transient  (non-detection) AT 2024xpy - Type BL Transient AT 2024xxu - Type YSO? Transient     NGC 6820 - Nebula     Variable Stars (photometric monitoring) - BL Lac, T CrB     Nearby Stars (astrometric monitoring) - Barnards Star	- Evening Session (2.8 hrs), ended earlier by cloud and snow.      - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -1.5°C (min) - CCD Temperature: -25°C - Notes from 2024-11-18 >>     -

Observing Result

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-11-18 (passing through Serpens) Sun Distance 1.26 AU (receeding) Earth Distance 1.58 AU (236.7 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-11-18 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 68.15 arcsec/hr, Dec 3.38 arcsec/hr)
Annotated CCD Image (50% size, log scale) 2 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:31 UT (#1272064-65) 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) 10 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:34 UT (#1272064-73) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
C/2023 A3 (Tsuchinshan-ATLAS) - 2024-11-18		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-11-18
False Color CCD Image (50% size, log scale) 10 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:34 UT (#1272064-73) 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 >>

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Nova Vul 2024 - Nova (V615 Vul)

Nova Vul 2024 (Vulpecula) Alias: N Vul 2024, V615 Vul, PNV J19430751+2100204 Nova Vul 2024 (Type: Nova) discovered 2024-07-29.832 UT by New Milky Way survey Discovery Magnitude 11.2 Maximum Magnitude 9.8 [ Novae ]

Nova Vul 2024 - 2024-11-18 (T+112.0d) Image below (2024-11-18.808) was taken 112.0 days after discovery of Nova Vul 2024 Positon of Nova (faint, fading) is shown by white cross hairs.   Measured magnitude +15.83 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:25 UT (#1272057-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Vul 2024 - Earlier Image, 2024-09-10 (T+43.0d) Image below (2024-09-10.867) was taken 43.0 days after discovery of nova Nova (distinct) is shown by white cross hairs.   Measured magnitude +13.10 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-09-10 20:49 UT (#1240006-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Vul 2024 on Novae 2024 Page >>

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AT 2023cui - Type YSO? Transient (non-detection)

AT 2023cui (Aquila) AT 2023cui (Type: YSO?) discovered 2023-03-06.718 UT by Gaia Alias: Gaia23bab Alerting Magnitude 16.31 (G-Gaia Filter) vs Historic Magnitude 18.33 +/- 0.64 SD Brightening in candidate YSO  ( TNS 2023cui | Gaia23bab )

AT 2023cui - 2024-11-18 (T+623.1d) Image below (2024-11-18.792) was taken 623.1 days after discovery of 2023cui Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.5 (Clear Filter) Object appears to be within its normal low state magnitude range 18.42 to 18.93 (Gaia data)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:10 UT (#1272050-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023cui on Transients 2023 Page >>

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AT 2023jtn - Transient

AT 2023jtn (Cygnus) AT 2023jtn (Type: unk) discovered 2023-05-30.281 UT by GEOTS Alias: GEOTS-Balaji-2023-006, TCP J19574498+3018065 Discovery Magnitude 16.9 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 17.5  ( TNS 2023jtn )

AT 2023jtn - 2024-11-18 (T+538.6d) Image below (2024-11-18.838) was taken 538.6 days after discovery of 2023jtn Position of earlier transient (very faint) is shown by white cross-hairs Measured Magnitude +16.39 (Clear Filter)

Annotated CCD Image (125% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 20:13 UT (#1272083-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023jtn on Transients 2023 Page >>

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AT 2024xig - Transient (non-detection)

AT 2024xig (Sagittarius) AT 2024xig (Type: unk) discovered 2024-10-01.311 UT by Gaia Alias: Gaia24ctz Discovery Magnitude 15.79 (G-Gaia Filter) Bright blue transient near faint blue PS1 source  ( TNS 2023jtn | Gaia24ctz )

AT 2024xig - 2024-11-18 (T+48.4d) Image below (2024-11-18.747) was taken 48.4 days after discovery of 2024xig Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 18:03 UT (#1272023-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023jtn on Transients 2023 Page >>

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AT 2024xpy - Type BL Transient

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AT 2024xxu - Type YSO? Transient

AT 2024xxu (Vulpecula) AT 2024xxu (Type: YSO?) discovered 2024-10-08.337 UT by Gaia Alias: Gaia24cxe Alerting Magnitude 15.44 (Clear Filter) vs Historic Magnitude 14.40 +/- 0.16 SD Candidate YSO dims by 1 mag  ( TNS 2024xxu | Gaia24cxe )

AT 2024xxu - 2024-11-18 (T+41.5d) Image below (2024-11-18.822) was taken 41.5 days after discovery of 2024xxu Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude  +14.67 (Clear Filter) Star is likely within its normal range (14.14 to 14.67, G- Gaia Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:54 UT (#1272076-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024xxu on Transients 2024 Page >>

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NGC 6820 - Nebula

NGC 6820 (Vulpecula)

Annotated CCD Image (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:54 UT (#1272076-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6820 - Detail

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-18 19:54 UT (#1272076-80) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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