David's Astronomy Pages Images - Session 1439 (2026-07-12)

Images (S1438)

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Image (S1439)

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Session Notes

AT 2026iul - CV Type Transient AT 2026juw - CV Type Transient   NGC 4205 - Spiral Galaxy with Type Ia Supernova 2026fvx NGC 5907 - Spiral Galaxy with Type II Supernova 2026kid NGC 6070 - Spiral Galaxy with Type II Supernova 2026ejy   UGC 525 - Spiral Galaxy with Type Ia Supernova 2025ahxd   Variable Stars (photometric monitoring) - T CrB, BL Lac, CY Lyr, KIC 8462852 (Tabby's Star)   Nearby Stars (astrometric monitoring) - 61 Cyg

- All-Night Session (3.0 hr) - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 7.5°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2026-07-12 >> - -

Observing Result

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AT 2026iul  - CV Type Transient

AT 2026iul (Cygnus) AT 2026iul (Type: CV) discovered 2026-04-07.397 UT by GEOTS Alias: GEOTS-PAPA-SHANKAR-2026-003 Discovery Magnitude 15.7 (Clear- Filter) vs Prior Non-Detection Limiting Magnitude 18 (Clear- Filter) Discovered in Cyg using 14" f/2.0 Astrograph at Golden Ears Observatory (MPC code U55). Group reports a significant brightening of the Gaia DR3 variable star 2033708559892804224 (VSX). Recent observations show an increase in magnitude of >2.3 when compared to the last recorded observation from Golden Ears Observatory on 02 March 2026. ( TNS 2026iul )

AT 2026iul - 2026-07-13 (T+96.6d) Image below (2026-07-13.039) was taken 96.6 days after discovery of 2026iul Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +14.87 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-07-13 00:59 UT (#1439056-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026iul on Transients 2026 Page  >>

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AT 2026juw  - CV Type Transient

AT 2026juw (Cygnus) AT 2026juw (Type: CV) discovered 2026-04-16.318 UT by GEOTS Alias: GEOTS-Balaji-2026-005, IRAS 19523+4538 Discovery Magnitude 13.8 (Clear- Filter) vs Prior Non-Detection Limiting Magnitude 18 (Clear- Filter) Discovered in Cyg using 14" f/2.0 Astrograph at Golden Ears Observatory (MPC code U55). Group reports the discovery of a variable star displaying significant variability, characterized by periods of quiescence interspersed with episodic flaring activity. The object has increased in brightness by approximately 1.8 magnitudes compared to its last recorded observation on March 30, 2025. Period analysis of ZTF light curves performed with Peranso suggests a periodicity of roughly 323 days. ( TNS 2026juw )

AT 2026juw - 2026-07-13 (T+87.7d) Image below (2026-07-13.047) was taken 87.7 days after discovery of 2026juw Position of earlier transient (distinct) is shown by white cross-hairs Measured Magnitude +12.98 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-07-13 01:11 UT (#1439063-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026juw on Transients 2026 Page  >>

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NGC 4205  - Spiral Galaxy with Type Ia Supernova 2026fvx

NGC 4205 with SN 2026fvx (Draco) SN 2026fvx (Type: Ia) discovered 2026-03-17.986 UT by LAST Alias: ZTF26aamqluf, ATLAS26dgt Discovery Magnitude 19.46 (Clear- Filter) vs Prior Non-Detection Limiting Magnitude 19.97 (Clear- Filter) ( TNS 2026fvx )

NGC 4205 with SN 2026fvx - 2026-07-12 (T+117.0d) Image below (2026-07-12.994) was taken 117.0 days after discovery of 2026fvx Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +15.19 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-07-13 00:00 UT (#1439030-34) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4205 with SN 2026fvx - Earlier Image, 2026-04-03 (T+16.9d) Image below (2026-04-03.922) was taken 16.9 days after discovery of 2026fvx Position of earlier supernova (distinct) is shown by white cross-hairs Measured Magnitude +12.38 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-03 22:13 UT (#1416033-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026fvx (in NGC 4205) on Supernovae 2026 Page  >>

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NGC 5907  - Spiral Galaxy with Type II Supernova 2026kid

NGC 5907 with SN 2026kid (Draco) SN 2026kid (Type: II) discovered 2026-04-22.600 UT by Yasuo Sano Alias: ATLAS26equ, ZTF26aatswhm Discovery Magnitude 16.62 (Clear- Filter) vs Prior Non-Detection Limiting Magnitude 19 (Clear- Filter) SCT 0.36-m F/11 reflector + FLI ML1001E CCD, Nayoro Hokkaido Japan ( TNS 2026kid )

NGC 5907 with SN 2026kid - 2026-07-12 (T+81.4d) Image below (2026-07-12.985) was taken 81.4 days after discovery of 2026kid Position of earlier supernova (faint) is shown by white cross-hairs Estimated Magnitude +15.6 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-07-12 23:41 UT (#1439026-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026kid (in NGC 5907) on Supernovae 2026 Page  >>

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NGC 6070  - Spiral Galaxy with Type II Supernova 2026ejy

NGC 6070 with SN 2026ejy (Serpens) SN 2026ejy (Type: II) discovered 2026-02-25.180 UT by ATLAS Alias: GOTO26bnq, ZTF26aaiedvz, ATLAS26coa, BGEM J161000.25+004220.7 Discovery Magnitude 18.55 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 20.4 (L-GOTO Filter) ( TNS 2026ejy )

NGC 6070 with SN 2026ejy - 2026-07-12 (T+137.8d) Image below (2026-07-12.961) was taken 137.8 days after discovery of 2026ejy Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +15.17 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-07-12 23:14 UT (#1439015-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026ejy (in NGC 6070) on Supernovae 2026 Page  >>

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UGC 525  - Spiral Galaxy with Type Ia Supernova 2025ahxd

UGC 525 with SN 2025ahxd (Pisces) SN 2025ahxd (Type: Ia) discovered 2025-12-22.101 UT by ATLAS Alias: ZTF25ackdapv Discovery Magnitude 20.1472 (g-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.9825 (g-ZTF Filter) ( TNS 2025ahxd )

UGC 525 with SN 2025ahxd - 2026-07-13 (T+202.9d) Image below (2026-07-13.016) was taken 202.9 days after discovery of 2025ahxd Position of earlier supernova (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.4 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-07-13 00:32 UT (#1439042-46) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025ahxd (in UGC 525) on Supernovae 2025 Page  >>

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