David's Astronomy Pages Images - Session 1207 (2024-04-12)

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Session Notes

C/2021 A1 (Leonard) - Comet     AT 2023huk - Transient AT 2023txn - CV Type Transient AT 2023abtv - CV Type Transient AT 2024crd - Type Nova? Transient AT 2024epa - CV Type Transient     IC 4588 - Elliptical Galaxy with Type Ia Supernova 2023ifv     NGC 4216 - Spiral Galaxy with Type Ia Supernova 2024gy NGC 5036 - Elliptical Galaxy with Type Ia Supernova 2024dop NGC 6004 - Spiral Galaxy with Type II Supernova 2024cld NGC 6433 - Spiral Galaxy with Type Ia Supernova 2024efn     UGC 8630 - Spiral Galaxy with Type II Supernova 2024drv       - 29P/Schwassmann-Wachmann attempt failed (due to wind)   - NGC 4192A w/SN2024exw attempt failed (due to cloud)     Variable Stars (photometric monitoring) - BL Lac      Nearby Stars (astrometric monitoring) - None

- Post-Midnight Session (4.7 hrs)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 8°C (min) - CCD Temperature:   -10°/-15°C - Notes from 2024-04-12 >>     -

Observing Result

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C/2021 A1 (Leonard) - Comet  (passing by NGC 4631)

C/2021 A1 (Leonard) - 2024-04-13 (passing through Ophiuchus) Sun Distance 9.15 AU (receeding) Earth Distance 8.45 AU (1263.7 million km) Expected position of comet (no visible) is shown by white circle		C/2021 A1 (Leonard) - 2024-04-13, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -13.32 arcsec/hr, Dec 5.95 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 03:25 UT (#1207111-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, square root scale, cropped) Image details as left
Images of C/2021 A1 (Leonard) on Comets 2021 Page >>

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AT 2023huk - Transient

AT 2023huk (Hercules) AT 2023huk (Type: unk) discovered 2023-05-08.278 UT by ATLAS Alias: ATLAS17fes Discovery magnitude 16.11 (orange-ATLAS)  vs Prior Non-Detection Limiting Magnitude 18.23  ( TNS 2023huk )

AT 2023huk - 2024-04-13 (T+340.8d) Image below (2024-04-13.046) was taken 340.8 days after discovery of 2023huk Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection, Limiting Magntitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 01:15 UT (#1207052-56) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023huk on Transients 2023 Page >>

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AT 2023txn - CV Type Transient

AT 2023txn (Cygnus) AT 2023txn (Type: CV) discovered 2023-09-29.797 UT by Gaia Alias: Gaia23cse Discovery magnitude 11.83 (G-Gaia) vs Historic Mag 13.14 Red Galactic plane source brightens erratically by 2 mag & becomes bluer  ( TNS 2023txn | Gaia23cse )

AT 2023txn - 2024-04-13 (T+196.3d) Image below (2024-04-13.084) was taken 196.3 days after discovery of 2023txn Position of reported transient (stable ?) is shown by white cross-hairs Measured magntitude +12.89 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 02:04 UT (#1207073-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023txn on Transients 2023 Page >>

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AT 2023abtv - CV Type Transient

AT 2023abtv (Pegasus) AT 2023abtv (Type: CV) discovered 2023-12-26.986 UT by Gaia Alias: Gaia23duv Discovery magnitude 12.07 (G-Gaia Filter) vs Historic Magnitude 13.38 +/- 0.57 (SD) Gaia and WISE source brightens by 2 mag  ( TNS 2023abtv | Gaia23duv )

AT 2023abtv - 2024-04-13 (T+108.1d) Image below (2024-04-13.100) was taken 108.1 days after discovery of 2023abtv Position of reported transient (fading) is shown by white cross-hairs Measured Magnitude +12.15 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 02:27 UT (#1207085-89) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023abtv on Transients 2023 Page >>

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AT 2024crd - Type Nova? Transient

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AT 2024epa - CV Type Transient

AT 2024epa (Aquila) AT 2024epa (Type: CV) discovered 2024-03-15.507 UT by Gaia Alias: Gaia24azt Discovery Magnitude 13.72 (G-Gaia Filter) vs Historic Magnitude 13.93 +/- 0.03 SD  ~0.3 mag rise in Gaia source  ( TNS 2024epa | Gaia24azt )

AT 2024epa - 2024-04-13 (T+28.6d) Image below (2024-04-13.075) was taken 28.6 days after discovery of 2024epa Position of reported transient (stable) is shown by white cross-hairs Measured Magnitude +13.82 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 01:51 UT (#1207066-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024epa on Transients 2024 Page >>

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IC 4588 - Elliptical Galaxy with Type Ia Supernova 2023ifv

IC 4588 with SN 2023ifv (Serpens) SN 2023ifv (Type: Ia) discovered 2023-05-13.421 UT by ATLAS Alias: ATLAS23kgp Discovery Magnitude 15.5 ( Clear Filter)  ( TNS 2023ifv )

IC 4588 - Elliptical Galaxy IC 4588 (catalog mag 15.0) with several other galaxies in FOV NGC 6051 (catalog mag +13.2 / 14.1), PGC 57014 (catalog mag +16.0), PGC 57003 (catalog mag +16.4),  PGC 56958 (catalog mag +16.4), PGC 140564 (catalog mag +16.6), PGC 140565 (catalog mag +17.4),  PGC 1697119 (catalog mag +17.4), PGC 57010 (catalog mag +18.0)

Annotated CCD Image (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 00:52 UT (#1207045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 4588 with SN 2023ifv - 2024-04-13 (T+335.6d) Image below (2024-04-13.030) was taken 335.6 days after discovery of 2023ifv Position of earlier SN (likely faded & no longer visible) is indicated by white cross-hairs.

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 00:52 UT (#1207045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023ifv (in IC 4588) on Supernova 2023 Page >>

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NGC 4216 - Spiral Galaxy with Type Ia Supernova 2024gy

NGC 4216 with SN 2024gy (Virgo) SN 2024gy (Type: Ia, z=0.001183) discovered 2024-01-04.678 UT by Koichi Itagaki Alias: AT2023acjv, AT2024ix, ASASSN-24ac, PSN J12155131+1306561 Discovery Magnitude 16.3 ( Clear Filter)  ( TNS 2024gy )

NGC 4216 with SN 2024gy - 2024-04-13 (T+99.4d) Image below (2024-04-13.128) was taken 99.4 days after discovery of 2024gy Position of reported SN (fading) is indicated by white cross-hairs. Measured Magnitude +14.71* (Clear Filter) * Measurement is uncertain due to poor image quality Poor quality image (due to cloud/poor sky transparency)

Annotated CCD Image (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 03:08 UT (#1207105-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024gy (in NGC 4216) on Supernova 2024 Page >>

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NGC 5036 - Elliptical Galaxy with Type Ia Supernova 2024dop

NGC 5036 with SN 2024dop (Virgo) SN 2024dop (Type: Ia) discovered 2024-03-02.390 UT by ASAS-SN Alias: ASASSN-24bm Discovery Magnitude 16.4 (g-SLOAN Filter) vs Prior Non-Detection Limiting Mag 16.7  ( TNS 2024dop )

NGC 5036 with SN 2024dop - 2024-04-12 (T+41.6d) Image below (2024-04-12.974) was taken 41.6 days after discovery of 2024dop Position of reported SN (very faint) is indicated by white cross-hairs. Estimated Magnitude +17.9 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-12 23:32 UT (#1207016-20) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024dop (in NGC 5036) on Supernova 2024 Page >>

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NGC 6004 - Spiral Galaxy with Type II Supernova 2024cld

NGC 6004 with SN 2024cld (Serpens) SN 2024cld (Type: II) discovered 2024-02-13.228 UT by GOTO Alias: GOTO24ql, ATLAS24clv Discovery Magnitude 17.97 ( Clear Filter) Spectrum contains clear narrow H Balmer and He II 4686A flash ionisation features typically seen in young type II SNe  ( TNS 2024cld )

NGC 6004 with SN 2024cld - 2024-04-13 (T+59.8d) Image below (2024-04-13.013) was taken 59.8 days after discovery of 2024cld Position of reported SN (distinct, fading) is indicated by white cross-hairs. Measured Magnitude +16.05 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 00:27 UT (#1207038-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024cld (in NGC 6004) on Supernova 2024 Page >>

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NGC 6433 - Spiral Galaxy with Type Ia Supernova 2024efn

NGC 6433 with SN 2024efn (Hercules) SN 2024efn (Type: Ia) discovered 2024-03-12.496 UT by CRTS Alias: SNhunt463 Discovery Magnitude 19.0 (V-crts-CRTS Filter) vs Prior Non-Detection Limiting Magnitude 21.0  ( TNS 2024efn )

NGC 6433 with SN 2024efn - 2024-04-13 (T+31.6d) Image below (2024-04-13.062) was taken 31.6 days after discovery of 2024efn Position of reported supernova (fading) is shown by white cross-hairs Measured Magnitude +16.07 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-13 01:38 UT (#1207059-63) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024efn (in NGC 6433) on Supernova 2024 Page >>

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UGC 8630 - Spiral Galaxy with Type II Supernova 2024drv

UGC 8630 with SN 2024drv (Canes Venatici) SN 2024drv (Type: II) discovered 2024-03-02.513 UT by ATLAS Alias: ATLAS24dct Discovery Magnitude 16.56 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Mag 18.86  ( TNS 2024drv )

UGC 8630 with SN 2024drv - 2024-04-12 (T+41.5d) Image below (2024-04-12.991) was taken 41.5 days after discovery of 2024drv Position of reported SN (distinct, fading slowly) is indicated by white cross-hairs. Measured Magnitude +15.44 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-12 23:56 UT (#1207024-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024drv (in UGC 8630) on Supernova 2024 Page >>

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