David's Astronomy Pages Images - Session 1311 (2025-04-06)

Images (S1310)

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Images (S1311)

Objects

Session Notes

M84 - Elliptical Galaxy     NGC 3956 - Spiral Galaxy (UGCA 251) NGC 5068 - Spiral Galaxy (UGCA 345) NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw NGC 6106 - Spiral Galaxy with Type Ib Supernova 2024ahv     UGCA 277 - Irregular Galaxy (PGC 39395) UGC 3355 - Spiral Galaxy with Type Ia Supernova 2025dbx UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs UGC 10913 - Spiral Galaxy with Transient AT 2025hy         Variable Stars (photometric monitoring) - None         Nearby Stars (astrometric monitoring) - None

- All-Night Session (7.2 hr)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 4.5°C (min) - CCD Temperature: -15°/-20°C - Notes from 2025-04-06 >>     -

Observing Result

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M84 - Elliptical Galaxy

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NGC 3956 - Spiral Galaxy (UGCA 251)

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NGC 5068 - Spiral Galaxy (UGCA 345)

NGC 5068 (Virgo) Alias: UGCA 345 (Catalog mag +9.8 or +10.6) [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-07 00:16 UT (#1311106-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5068 - Detail

Annotated CCD Image (100% size, square root scale, cropped) Image details as above

Negative CCD Image (150% size, square root scale, cropped) Image details as above

NGC 5068 - Earlier Image with  Luminous Red Nova AT 2020hat (Apr 2020) AT2020hat (Type LRN, luminous red nova) discovered 2020/04/12.475 by ATLAS  (Rochester Supernova site |  K. Itagaki image  mag +17.9 at 2020/04/14.618 | Image (2020-04-19.941) taken 7.47 days after LRN discovery. SN shown by white cross hairs. Magnitude ? (v. faint) A LRN is is a stellar explosion thought to be caused by the merging of two stars. The luminosity of the explosion occurring in luminous red novae is between that of a supernova (which is brighter) and a nova (dimmer). The visible light lasts for weeks or months, and is distinctively red in colour, becoming dimmer and redder over time. (Wikipedia)

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2020-04-19 22:35 UT (#770052-56) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

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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 - Spiral Galaxy

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-07 01:52 UT (#1311165-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6106 with SN 2024ahv - 2025-04-07 (T+446.2d) Image below (2025-04-07.071) was taken 446.2 days after discovery of 2024ahv Position of earlier transient (faded & no longer visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +19.3 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-07 01:52 UT (#1311165-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6106 with SN 2024ahv - Earlier Image, 2024-02-14 (T+28.3d) Image below (2024-02-14.169) was taken 28.3 days after discovery of 2024ahv Position of reported transient (distinct) is shown by white cross-hairs Measured Magnitude +14.79 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-02-14 04:11 UT (#1185234-37) 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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UGCA 277 - Irregular Galaxy (PGC 39395)

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UGC 3355 - Spiral Galaxy with Type Ia Supernova 2025dbx

UGC 3355 with SN 2025dbx (Auriga) SN 2025dbx (Type: Ia) discovered 2025-03-01.298 UT by ATLAS using ATLAS Haleakala Telescope Alias: ATLAS25cgo Discovery magnitude 18.78 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.35  ( TNS 2025dbx)

UGC 3355 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-06 21:20 UT (#1311012-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 3355 with SN 2025dbx - 2025-04-06 (T+36.6d) Image below (2025-04-06.883) was taken 36.6 days after discovery of 2025dbx Position of reported supernova (very faint ) is shown by white cross-hairs Estimated Magnitude +18.5 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-06 21:20 UT (#1311012-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025dbx (in UGC 3355) on Supernova 2025 Page >>

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UGC 10058 - Spiral Galaxy with Type II Supernova 2025gvs

UGC 10058 with SN 2025gvs (Corona Borealis) SN 2025gvs (Type: II) discovered 2025-04-05.502 UT by ATLAS Alias: ATLAS25dpm Discovery magnitude 17.59 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 17.7  ( TNS 2025gvs)

UGC 10058 - Spiral Galaxy with SN 2025gvs (T+1.6d)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-07 02:36 UT (#1311179-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 10058 with SN 2025gvs - 2025-04-07 (T+1.6d) Image below (2025-04-07.102) was taken 1.6 days after discovery of 2025gvs Position of reported supernova (distinct, brightening) is shown by white cross-hairs Measured Magnitude +16.59 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2025-04-07 02:36 UT (#1311179-83) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025gvs (in UGC 10058) on Supernova 2025 Page >>

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UGC 10913 - Spiral Galaxy with Transient AT 2025hy

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