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Images - Session 1421 (2026-04-13)
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29P/Schwassmann-Wachmann - Comet AT 2026iul - CV Type Transient IC 700 - Spiral Galaxy with Type IIb Supernova 2025aico NGC 3689 - Spiral Galaxy with Type Ib Supernova 2026gwx NGC 3861 - Spiral Galaxy with Type II Supernova 2026ihi NGC 4205 - Spiral Galaxy with Type Ia Supernova 2026fvx NGC 4914 - Elliptical Galaxy with Type Ia Supernova 2026fjc PCG 1137+3234 - Compact Galaxy Group Variable Stars (photometric monitoring) - T CrB, ER UMa Nearby Stars (astrometric monitoring) - None
- Attempted all-Night Session (3.2 hr), ended early due to cloud/rain. - 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 2026-04-13 >> - -
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29P/Schwassmann-Wachmann - 2026-04-13 (passing through Leo) Sun Distance 6.31 AU Earth Distance 5.48 AU (819.9 million km) |
29P/Schwassmann-Wachmann - 2026-04-13 Detail
Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -10.5 arcsec/hr, Dec 5.0 arcsec/hr) Measured M2 Magnitude +13.32 (Clear Filter) |
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Annotated CCD Image (50% size, square root scale)
7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-04-13 23:14 UT (#1421013-19) 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)
7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-04-13 23:14 UT (#1421013-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Images of Comet_29P_Schwassmann-Wachmann on Comets 2026 Page >> | ||
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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 ) |
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AT 2026iul - 2026-04-14 (T+6.7d)
Image below (2026-04-14.077) was taken 6.7 days after discovery of 2026iul Position of earlier transient (faint but distinct) is shown by white cross-hairs Measured Magnitude +14.13 (Clear Filter) |
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Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter 2026-04-14 01:51 UT (#1421077) 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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IC 700 with SN 2025aico (Leo)
SN 2025aico (Type: IIb) discovered 2025-12-24.202 UT by GOTO Alias: GOTO25mmu, ATLAS25qfv, ZTF25ackyfnb Discovery Magnitude 16.86 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 20.3 (L-GOTO Filter) ( TNS 2025aico ) |
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IC 700 with SN 2025aico - 2026-04-13 (T+110.8d)
Image below (2026-04-13.991) was taken 110.8 days after discovery of 2025aico Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +16.14 (Clear Filter) |
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Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-13 23:55 UT (#1421029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2025aico (in IC 700) on Supernovae 2025 Page >> |
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NGC 3689 with SN 2026gwx (Leo)
SN 2026gwx (Type: Ib) discovered 2026-03-20.236 UT by ATLAS Alias: ZTF26aaodgsa, GOTO26cmj, ATLAS26dmo, WFST260320nhhv, PS26ash Discovery Magnitude 20.8896 (r-ZTF Filter) vs Prior Non-Detection Limiting Magnitude 20.921 (g-ZTF Filter) Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). ( TNS 2026gwx ) |
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NGC 3689 with SN 2026gwx - 2026-04-13 (T+24.7d)
Image below (2026-04-13.976) was taken 24.7 days after discovery of 2026gwx Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +14.79 (Clear Filter) |
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Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-13 23:34 UT (#1421022-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2026gwx (in NGC 3689) on Supernovae 2026 Page >> |
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NGC 3861 with SN 2026ihi (Leo)
SN 2026ihi (Type: II) discovered 2026-04-04.401 UT by ATLAS Alias: ATLAS26dru, GOTO26cvs, BGEM J114504.57+195815.7, ZTF26aardkdm Discovery Magnitude 18.182 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.41 (orange-ATLAS Filter) ( TNS 2026ihi ) |
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NGC 3861 with SN 2026ihi - 2026-04-14 (T+9.6d)
Image below (2026-04-14.021) was taken 9.6 days after discovery of 2026ihi Position of earlier supernova (faint) is shown by white cross-hairs Estimated Magnitude +17.0 (Clear Filter) |
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Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-14 00:38 UT (#1421043-47) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2026ihi (in NGC 3861) on Supernovae 2026 Page >> |
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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 ) |
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NGC 4205 with SN 2026fvx - 2026-04-14 (T+27.1d)
Image below (2026-04-14.060) was taken 27.1 days after discovery of 2026fvx Position of earlier supernova (distinct) is shown by white cross-hairs Measured Magnitude +12.76 (Clear Filter) |
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Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-14 01:34 UT (#1421067-70) 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 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 ) |
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NGC 4914 with SN 2026fjc - 2026-04-14 (T+33.0d)
Image below (2026-04-14.037) was taken 33.0 days after discovery of 2026fjc Position of earlier supernova (fading) is shown by white cross-hairs Estimated Magnitude +15.4 (Clear Filter) |
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Annotated CCD Image (125% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-14 01:01 UT (#1421051-55) 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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PCG 1137+3234 (Ursa Major)
Palomar Compact Galaxy Catalogue, radius 35 arcsec, mag 15.6 [ PCG Groups ] |
| PCG 1137+3234 - Compact Galaxy Group |
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Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-14 00:17 UT (#1421036-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| PCG 1137+3234 (Ursa Major) |
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Annotated CCD Image (175% size, square root scale, cropped)
Image details as above |
| PCG 1137+3234 (Ursa Major) |
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Annotated CCD Image (175% size, square root scale, cropped)
Image details as above |
| PCG 1137+3234 (Ursa Major) |
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Annotated negative CCD Image (175% size, square root scale, cropped)
Image details as above |
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IC 700 with SN 2025aico (Leo)
SN 2025aico (Type: IIb) discovered 2025-12-24.202 UT by GOTO Alias: GOTO25mmu, ATLAS25qfv, ZTF25ackyfnb Discovery Magnitude 16.86 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 20.3 (L-GOTO Filter) ( TNS 2025aico ) |
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IC 700 with SN 2025aico - 2026-04-13 (T+110.8d)
Image below (2026-04-13.991) was taken 110.8 days after discovery of 2025aico Position of earlier supernova (faint) is shown by white cross-hairs Measured Magnitude +16.14 (Clear Filter) |
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Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-13 23:55 UT (#1421029-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2025aico (in IC 700) on Supernovae 2025 Page >> |
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| This Web Page: | Images - Session 1421 (2026-04-13) |
| Last Updated : | 2026-05-22 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |