David's Astronomy Pages Images - Session 1281 (2024-12-10)

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Session Notes

C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2022fnb - CV Type Transient AT 2023uqd - Type YSO? Transient (near V0669 Cep & LDN 1196) AT 2024dcg - CV Type Transient (non-detection) AT 2024gfh - Transient (non-detection)     M31 - Spiral Galaxy with Nova M31 2024-11b? (not distinguishable) M33 - Spiral Galaxy with Nova M33 2024-08a?  (not distinguishable)     SN 2024xqt - Type Ia Supernova       - AT2022rhq attempt failed (due to cloud)     Variable Stars (photometric monitoring) - None     Nearby Stars (astrometric monitoring) - Groombridge 34

- Attempted All-Night Session (5.7 hr), interrupted by and ended early by cloud.  Cold night  (-3°C).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -3°C (min) - CCD Temperature: -25°C - Notes from 2024-12-10 >>     -

Observing Result

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-10 (passing through Aquila) Sun Distance 1.64 AU (receeding) Earth Distance 2.23 AU (333.7 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-10 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 43.29 arcsec/hr, Dec 7.71 arcsec/hr)
Annotated CCD Image (50% size, log scale) 2 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-10 17:49 UT (#1281005-06) 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) 6 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-10 17:50 UT (#1281005-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-10		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-12-10
False Color CCD Image (50% size, log scale) 6 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-10 17:50 UT (#1281005-10) 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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AT 2022fnb - CV Type Transient

AT 2022fnb (Cepheus) AT 2022fnb (Type: CV) discovered 2022-03-30.875 UT by MASTER Alias: MASTER OT J222553.47+602042.5 Discovery magnitude 13.2 (Clear filter) vs Last Non-Detection at limiting mag 18.9  ( TNS 2022fnb)

AT 2022fnb - 2024-12-10 (T+986.0d) Image below (2024-12-10.909) was taken 986.0 days after discovery of 2022fnb Position of earlier reported transient (brightened, still active) is shown by white cross-hairs Measured magntitude + 11.60 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-12-10 21:53 UT (#1281038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022fnb - Earlier Image, 2023-07-22 (T+479.1d) Image below (2023-07-22.990) was taken 479.1 days after discovery of 2022fnb Position of earlier reported transient (fading slowly but still distinct) is shown by white cross-hairs Measured magntitude + 13.17 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-07-22 23:49 UT (#1123022-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022fnb - Reference Image (DSS2 Color)

Images of AT 2022fnb on Transients 2022 Page >>

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AT 2023uqd - Type YSO? Transient

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AT 2024dcg - CV Type Transient (Non-Detection)

AT 2024dcg (Lynx) AT 2024dcg (Type: CV) discovered 2024-02-19.350 UT by ATLAS Alias: ATLAS16dzn Discovery magnitude 16.15 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.51  ( TNS 2024dcg )

AT 2024dcg - 2024-12-10 (T+295.6d) Image below (2024-12-10.924) was taken 295.6 days after discovery of 2024dcg Position of earlier transient (faded & no longer visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.4 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, Clear Filter 2024-12-10 22:17 UT (#1281054-58) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dcg - Earlier Image, 2024-02-25 (T+5.7d) Image below (2024-02-25.071) was taken 5.7 days after discovery of 2024dcg Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +15.65 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, Clear Filter 2024-02-25 01:48 UT (#1191189-93) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dcg on Transients 2024 Page >>

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AT 2024gfh - Transient (Non-Detection)

AT 2024gfh (Cygnus) AT 2024gfh (Type: unk) discovered 2024-04-10.362 UT by GEOTS Alias: GEOTS-Balaji-2024-004, TCP J19445510+3846155 Discovery magnitude 16.5 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.0  ( TNS 2024gfh )

AT 2024gfh - 2024-12-10 (T+244.5d) Image below (2024-12-10.903) was taken 244.5 days after discovery of 2024gfh Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.4 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-12-10 21:40 UT (#1281035) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024gfh on Transients 2024 Page >>

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M31 - Spiral Galaxy with Nova M31 2024-11b? (not distinguishable)

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

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? - 2024-12-10 (T+117.6d) Image below (2024-12-10.940) was taken 117.6 days after discovery of Nova M33 2024-08a? Position of earlier transient (not distinguishable, likely faded) is shown by white cross-hairs  Poor quality image (poor sky transparency, single frame)

Annotated CCD Image (125% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-12-10 22:34 UT (#1281063) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 2024-08a? - Earlier Image, 2024-08-29 (T+13.7d) Image below (2024-08-29.078) was taken 13.7 days after discovery of Nova M33 2024-08a? Position of reported transient (very faint) is shown by white cross-hairs  Measured Magnitude +18.00 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-08-29 02:01 UT (#1234041-45) 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 >>

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SN 2024xqt - Type Ia Supernova

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