David's Astronomy Pages Images - Session 1428 (2026-04-30)

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Image (S1429)

Objects

Session Notes

29P/Schwassmann-Wachmann - Comet   C/2022 N2 (PANSTARRS) - Comet   KIC 8462852 - Variable Star (Tabby's Star, Boyajian's Star, WTF Star)   AT 2026jyw - Transient AT 2026kay - Transient   M31N 2026-04b? - Extragalactic Nova in M31  (non-detection)   NGC 3437 - Spiral Galaxy with Type I Supernova 2026kie NGC 3861 - Spiral Galaxy with Type II Supernova 2026ihi NGC 5907 - Spiral Galaxy with Type II Supernova 2026kid   UGC 12040 - Spiral Galaxy with Transient AT 2026kux   Variable Stars (photometric monitoring) - T CrB, CI Cyg, AM Her, RZ LMi, BL Lac, RR Leo, ER UMa, KIC 8462852 (Tabby's Star)   Nearby Stars (astrometric monitoring) - HH And (Ross 248)

- All-Night Session (5.5 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 2026-04-30 >> - -

Observing Result

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29P/Schwassmann-Wachmann  - Comet

29P/Schwassmann-Wachmann - 2026-04-30 (passing through Leo) Sun Distance 6.31 AU Earth Distance 5.67 AU (848.1 million km)		29P/Schwassmann-Wachmann - 2026-04-30 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -4.8 arcsec/hr, Dec 3.2 arcsec/hr) Measured M2 Magnitude +15.35 (Clear Filter)
Annotated CCD Image (50% size, square root scale) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 00:05 UT (#1428075-81) 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 2026-05-01 00:05 UT (#1428075-81) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of Comet_29P_Schwassmann-Wachmann on Comets 2026 Page  >>

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C/2022 N2 (PANSTARRS)  - Comet

C/2022 N2 (PANSTARRS) - 2026-04-30 (passing through Taurus) Sun Distance 4.50 AU Earth Distance 5.30 AU (793.4 million km)		C/2022 N2 (PANSTARRS) - 2026-04-30 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 40.6 arcsec/hr, Dec 3.4 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-04-30 21:35 UT (#1428006-07) 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) 6 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-04-30 21:38 UT (#1428006-12) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C2022_N2_PANSTARRS on Comets 2026 Page  >>

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KIC 8462852  - Variable Star (Tabby's Star, Boyajian's Star, WTF Star)

KIC 8462852 (Cygnus) Alias: Tabby's Star, Boyajian's Star, WTF Star Star shows large irregular dimmings. 1470 ly. Mag +11.7

KIC 8462852 (Cygnus) Position of vairible (distinct) is shown by white cross-hairs Measured Magnitude +11.70 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2026-04-30 22:35 UT (#1428038-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Active Monitoring - KIC 8462852  >>

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AT 2026jyw  - Transient

AT 2026jyw (Ophiuchus) AT 2026jyw (Type: unk) discovered 2026-04-17.498 UT by MASTER Alias: MASTER OT J170428.77-215420.0 Discovery Magnitude 15.9 (Other- Filter) vs Prior Non-Detection Limiting Magnitude 19.1 (Other- Filter) MASTER-OAGH ( TNS 2026jyw )

AT 2026jyw - 2026-05-01 (T+13.6d) Image below (2026-05-01.082) was taken 13.6 days after discovery of 2026jyw Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +15.68 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 02:07 UT (#1428124-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026jyw on Transients 2026 Page  >>

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AT 2026kay  - Transient

AT 2026kay (Ophiuchus) AT 2026kay (Type: unk) discovered 2026-04-12.143 UT by ATLAS Alias: ATLAS26eck, PS26bbr Discovery Magnitude 16.906 (wide-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.67 (orange-ATLAS Filter) ( TNS 2026kay )

AT 2026kay - 2026-05-01 (T+18.9d)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 01:46 UT (#1428117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2026kay - 2026-05-01 (T+18.9d) Image below (2026-05-01.067) was taken 18.9 days after discovery of 2026kay Position of earlier transient (very faint) is shown by white cross-hairs Measured Magnitude +18.29 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 01:46 UT (#1428117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026kay on Transients 2026 Page  >>

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M31N 2026-04b? - Extragalactic Nova in M31  (non-detection)

M31 with M31N 2026-04b? (Andromeda) M31N 2026-04b? (Type: EGN?) discovered 2026-04-23.056 UT by Kamil Hornoch et al. Alias: PNV J00433502+4146280 [ Messier Objects ]

M31 with M31N 2026-04b? (T+8.0d)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 00:50 UT (#1428091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with M31N 2026-04b? - 2026-05-01 (T+8.0d) Image below (2026-05-01.028) was taken 8.0 days after discovery of M31N 2026-04b? Position of earlier transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.9 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 00:50 UT (#1428091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of M31N 2026-04b? (in M31) on Transients 2026 Page  >>

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NGC 3437  - Spiral Galaxy with Type I Supernova 2026kie

NGC 3437 with SN 2026kie (Leo) SN 2026kie (Type: I) discovered 2026-04-22.314 UT by ATLAS Alias: ATLAS26epm, ZTF26aatzrft Discovery Magnitude 18.086 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.49 (orange-ATLAS Filter) ( TNS 2026kie )

NGC 3437 with SN 2026kie - 2026-04-30 (T+8.7d) Image below (2026-04-30.985) was taken 8.7 days after discovery of 2026kie Position of earlier supernova ( ) is shown by white cross-hairs Estimated Magnitude +15.8 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-30 23:47 UT (#1428068-72) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2026kie (in NGC 3437) on Supernovae 2026 Page  >>

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NGC 3861  - Spiral Galaxy with Type II Supernova 2026ihi

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 )

NGC 3861 with SN 2026ihi - 2026-05-01 (T+26.6d) Image below (2026-05-01.013) was taken 26.6 days after discovery of 2026ihi Position of earlier supernova (faint) is shown by white cross-hairs Estimated Magnitude +17.4 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 00:26 UT (#1428084-88) 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 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 - 2026-04-30 (T+8.3d) Image below (2026-04-30.910) was taken 8.3 days after discovery of 2026kid Position of earlier supernova (distinct) is shown by white cross-hairs Estimated Magnitude +14.7 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-04-30 21:59 UT (#1428015-19) 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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UGC 12040  - Spiral Galaxy with Transient AT 2026kux

UGC 12040 with AT 2026kux (Lacerta) AT 2026kux (Type: unk) discovered 2026-04-24.204 UT by ATLAS Alias: ATLAS26exf Discovery Magnitude 18.422 (wide-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.04 (wide-ATLAS Filter) ( TNS 2026kux )

UGC 12040 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 01:26 UT (#1428112-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 12040 with AT 2026kux - 2026-05-01 (T+6.9d) Image below (2026-05-01.058) was taken 6.9 days after discovery of 2026kux Position of earlier transient (faint) is shown by white cross-hairs Measured Magnitude +16.78 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2026-05-01 01:26 UT (#1428112-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 12040 w/AT2026kux - Earlier Image

CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-07-18 00:34 UT (#795045-48) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026kux (in UGC 12040) on Transients 2026 Page  >>

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KIC 8462852  - Variable Star (Tabby's Star, Boyajian's Star, WTF Star)

KIC 8462852 (Cygnus) Alias: Tabby's Star, Boyajian's Star, WTF Star Star shows large irregular dimmings. 1470 ly. Mag +11.7

KIC 8462852 (Cygnus) Position of vairible (distinct) is shown by white cross-hairs Measured Magnitude +11.70 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, V Filter 2026-04-30 22:35 UT (#1428038-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Active Monitoring - KIC 8462852  >>

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