David's Astronomy Pages Images - Session 1219 (2024-05-17)

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Session Notes

C/2023 A3 (Tsuchinshan-ATLAS) - Comet     AT 2024dsj - CV Type Transient     LEDA 2222714 - Galaxy with Type Ia Supernova 2024iey NGC 6106 - Spiral Galaxy with Type Ib Supernova 2024ahv     UGC 8630 - Spiral Galaxy with Type II Supernova 2024drv UGC 11067 - Spiral Galaxy with Type II Supernova 2024grw     Variable Stars (photometric monitoring) - AM Her, BL Lac      Nearby Stars (astrometric monitoring) - None

- All-Night Session (x hrs)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: x°C (min) - CCD Temperature:   -x°/ -15° C - Notes from 2024-05-17 >>     -

Observing Result

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C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2024-05-17 (passing through Virgo) Sun Distance 2.53 AU (approaching) Earth Distance 1.75 AU (262.5 million km) Poor quality image (bright sky background)		C/2023 A3 (Tsuchinshan-ATLAS) - 2024-05-17 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -98.27 arcsec/hr, Dec 16.45 arcsec/hr) Poor quality image (bright sky background, cloud)
Annotated CCD Image (50% size, square root scale) 60s exposure (single frame), 3x3 binning, Clear Filter 2024-05-17 22:39 UT (#1219008) 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) 9 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-05-17 22:43 UT (#1219006-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>

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AT 2024dsj - CV Type Transient

AT 2024dsj (Cassiopeia) AT 2024dsj (Type: CV) discovered 2024-02-28.787 UT by Gaia Alias: Gaia24ath Discovery Magnitude 15.25 (G-Gaia Filter) vs Historic Magnitude 15.03 +/- 0.02 SD  Gaia source fades by 0.2 mag TNS discovery report on TNS says Prior Non-Detection Limiting Mag 21.5 (2024-01-25 17:32) but Gaia data for the same date gives mag 15.26)  ( TNS 2024dsj | Gaia24ath )

AT 2024dsj - 2024-05-18 (T+79.2d) Image below (2024-05-18.004) was taken 79.2 days after discovery of 2024dsj Position of reported transient (faint, fading) is shown by white cross-hairs Measured Magnitude +14.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 00:09 UT (#1219027-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dsj on Transients 2024 Page >>

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LEDA 2222714 - Galaxy with Type Ia Supernova 2024iey

LEDA 2222714 with SN 2024iey (Hercules) SN 2024iey (Type: Ia) discovered 2024-05-06.424 UT by ZTF Alias: ZTF24aamipnt Discovery Magnitude 19.87 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.84  ( TNS 2024iey )

LEDA 2222714 - Galaxy LEDA 2222714 (alias  PGC 2222714, catalog mag +16.4) with adjacent galaxies PGC 57948 (catalog mag +14.2), PGC 2224030 (catalog mah +17.7), PGC 2221361 (catalog mag +17.9),  PGC 2221747 (catalog mag +18.0)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 00:50 UT (#1219041-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 2222714 with SN 2024iey - 2024-05-18 (T+11.6d) Image below (2024-05-18.028) was taken 11.6 days after discovery of 2024iey Position of reported SN (faint but distinct) is indicated by white cross-hairs. Measured Magnitude +15.63 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 00:50 UT (#1219041-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024iey (in LEDA 2222714) on Supernova 2024 Page >>

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NGC 6106 - Spiral Galaxy with Type Ib Supernova 2024ahv

NGC 6106 with SN 2024ahv (Hercules) SN 2024ahv (Type: Ib) discovered 2024-01-16.852 UT by Hidehiko Okoshi Alias: PS24vc, ATLAS24baw Discovery magnitude 16.2 (Clear Filter)  ( TNS 2024ahv)

NGC 6106 with SN 2024ahv - 2024-05-18 (T+122.2d) Image below (2024-05-18.044) was taken 122.2 days after discovery of 2024ahv Position of reported transient (faint) is shown by white cross-hairs Estimated Magnitude +16.2 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 01:12 UT (#1219048-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024ahv (in NGC 6106) 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 - 2024-05-18 (T+76.5d) Image below (2024-05-18.014) was taken 76.5 days after discovery of 2024drv Position of reported SN (distinct, fading) is indicated by white cross-hairs. Measured Magnitude +15.76 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 00:28 UT (#1219034-38) 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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UGC 11067 - Spiral Galaxy with Type II Supernova 2024grw

UGC 11067 with SN 2024grw (Ophiuchus) SN 2024grw (Type: II) discovered 2024-04-16.821 UT by ATLAS Alias: ATLAS24fvu, Gaia24bit Discovery Magnitude 18.36 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 20.09 (ATLAS) vs Historic Magnitude 20.45 +/- 0.05 (Gaia) Gaia comment : Confirmed SN II Gaia, 2024-02-01 06:55, mag 20.44 Gaia, 2024-04-16 19:43, mag 18.60 Gaia, 2024-05-03 06:03, mag 17.49 It is likely that the SN's progenitor is not the same as Gaia's  historical object recorded at mag 20.45 +/- 0.05, which is likely a foreground star since  the brightening in magnitude (only 3 mag or so ) is not consistent with the 10 mag brightening that would be expected for a SN.  The real progenitor would be expected to lay at mag 27 or so.  ( TNS 2024grw | Gaia24bit )

UGC 11067 with SN 2024grw - 2024-05-18 (T+31.2d) Image below (2024-05-18.059) was taken 31.2 days after discovery of 2024grw Position of reported supernova (faint, brightening ?) is shown by white cross-hairs Measured Magnitude +17.14 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-05-18 01:35 UT (#1219055-59) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024grw (in UGC 11067) on Supernova 2024 Page >>

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