David's Astronomy Pages Images - Session 1430 (2026-05-17)

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Image (S1431)

Objects

Session Notes

AT 2026iul - CV Type Transient AT 2026lck - Type Nova? Transient   NGC 4205 - Spiral Galaxy with Type Ia Supernova 2026fvx NGC 4914 - Elliptical Galaxy with Type Ia Supernova 2026fjc NGC 6070 - Spiral Galaxy with Type II Supernova 2026ejy   UGC 11058 - Spiral Galaxy with Type Ia Supernova 2026ewd   Variable Stars (photometric monitoring) - T CrB, S Cyg, S Cyg, RZ LMi, CY Lyr   Nearby Stars (astrometric monitoring) - None

- All-Night Session (3.2 hr) - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 2.5°C (min) - CCD Temperature:  -20°C - Notes from 2026-05-17 >> - -

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 - 2026-05-18 (T+40.6d) Image below (2026-05-18.024) was taken 40.6 days after discovery of 2026iul Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +14.46 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-05-18 00:36 UT (#1430042-44) 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 2026lck  - Type Nova? Transient

AT 2026lck (Aquila) AT 2026lck (Type: Nova?) discovered 2026-04-24.413 UT by ZTF Alias: DCAP32, ZTF26aatyimr Discovery Magnitude 15.89 (i-ZTF Filter) vs Prior Non-Detection Limiting Magnitude ( Filter) Group reports the discovery of a candidate dwarf nova.(DCAP pipeline DCAP32=ZTF26aatyimr) ASASSN-17cf associated with the target. ( TNS 2026lck )

AT 2026lck - 2026-05-18 (T+23.6d) Image below (2026-05-18.053) was taken 23.6 days after discovery of 2026lck Position of earlier transient (faint but distinct) is shown by white cross-hairs Measured Magnitude +13.48 (Clear Filter) Poor quality image (cloud/sky gradient, single frame)

Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2026-05-18 01:17 UT (#1430061) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026lck 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 - 2026-05-17 (T+61.0d) Image below (2026-05-17.969) was taken 61.0 days after discovery of 2026fvx Position of earlier supernova (fading) is shown by white cross-hairs Measured Magnitude +13.98 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-17 23:22 UT (#1430010-13) 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 4914  - Elliptical Galaxy with Type Ia Supernova 2026fjc

NGC 4914 with SN 2026fjc (Canes Venatici) SN 2026fjc (Type: Ia) discovered 2026-03-12.080 UT by ATLAS Alias: ATLAS26cwi, ZTF26aakqkpn, GOTO26ceh, WFST260310bkxqt Discovery Magnitude 18.475 (wide-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.35 (orange-ATLAS Filter) ( TNS 2026fjc )

NGC 4914 with SN 2026fjc - 2026-05-17 (T+66.9d) Image below (2026-05-17.983) was taken 66.9 days after discovery of 2026fjc Position of earlier supernova (faint) is shown by white cross-hairs Estimated Magnitude +16.3 (Clear Filter)

Annotated CCD Image (125% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-17 23:44 UT (#1430018-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026fjc (in NGC 4914) 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 - 2026-05-18 (T+81.9d) Image below (2026-05-18.036) was taken 81.9 days after discovery of 2026ejy Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +15.31 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-18 00:57 UT (#1430052-54) 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 11058  - Spiral Galaxy with Type Ia Supernova 2026ewd

UGC 11058 with SN 2026ewd (Hercules) SN 2026ewd (Type: Ia) discovered 2026-03-05.583 UT by ATLAS Alias: ATLAS26cph, GOTO26bqj, ZTF26aajugdc Discovery Magnitude 17.346 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.52 (cyan-ATLAS Filter) ( TNS 2026ewd )

UGC 11058 with SN 2026ewd - 2026-05-18 (T+73.4d) Image below (2026-05-18.006) was taken 73.4 days after discovery of 2026ewd Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +16.39 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-18 00:17 UT (#1430033-37) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026ewd (in UGC 11058) on Supernovae 2026 Page  >>

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